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WACKER POLYMERS VINNAPAS(R): Smooth ... - Wacker Chemie

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SMOOTH FLOORS THANKS<br />

TO SELF-LEVELING FLOOR SCREEDS<br />

CREATING TOMORROw’S SOLUTIONS


DEPENDABLE SOLUTIONS FOR THE<br />

CONSTRUCTION INDUSTRY


FOR YOUR BUSINESS – wE’RE MAKING<br />

THINGS SIMPLER THAN EVER<br />

Finding the ideal product for your ap-<br />

plication is now easier than ever with<br />

<strong>VINNAPAS</strong> ® . From the start of 2007,<br />

we have introduced new <strong>VINNAPAS</strong> ®<br />

product classes that are consistent<br />

the world over. At the same time, we<br />

have made the nomenclature simpler<br />

and more intuitive.<br />

3<br />

Five Letters. So Many Advantages<br />

From 2007, each product has been<br />

assigned a letter, which tells you straight<br />

away what its key property is. This helps<br />

you locate a product quickly and identify<br />

its technical characteristics from anywhere<br />

in the world. As a result, product selection<br />

is easier and less prone to error.<br />

<strong>VINNAPAS</strong> ® – Always in a Class of<br />

its Own<br />

Irrespective of their specific properties,<br />

all our <strong>VINNAPAS</strong> ® dispersible polymer<br />

powders offer top quality.<br />

The advantages are numerous:<br />

– Top quality in every application<br />

– High reliability<br />

– Excellent product consistency<br />

– Compliance with every applicable<br />

standard<br />

– Outstanding processability and a long<br />

open time<br />

– Excellent mechanical strength<br />

These properties are present in all grades<br />

and are the reason <strong>VINNAPAS</strong> ® is the<br />

market leader.


OVERVIEw OF THE <strong>VINNAPAS</strong> ®<br />

PRODUCT CLASSES<br />

<strong>VINNAPAS</strong> ® N –<br />

the rheologically neutral class:<br />

These <strong>VINNAPAS</strong> ® polymer powders<br />

excel because of their neutral effect on<br />

rheology. They provide a high degree<br />

of formulation freedom and are ideal for<br />

applications ranging from tile adhesives<br />

and self-leveling compounds to exterior<br />

insulation and finish systems.<br />

<strong>VINNAPAS</strong> ® T –<br />

the highly thixotropic class:<br />

These <strong>VINNAPAS</strong> ® polymer powders<br />

have been customized to enhance<br />

thixotropy. They find application, for<br />

example, in the production of non-slump<br />

tile adhesives and troweling compounds,<br />

in turn facilitating efficient processing –<br />

particularly on walls.<br />

<strong>VINNAPAS</strong> ® L –<br />

the class for optimum leveling:<br />

These <strong>VINNAPAS</strong> ® polymer powders<br />

enhance leveling. They help create<br />

smooth surfaces by not only improving<br />

antifoam and sedimentation behavior but<br />

also displaying excellent flow properties.<br />

<strong>VINNAPAS</strong> ® F –<br />

the class for excellent flow properties<br />

without superplasticizers:<br />

These <strong>VINNAPAS</strong> ® polymer powders<br />

enhance flow and can feature the<br />

rheology of either casein or synthetic<br />

superplasticizers. They are ideally suited<br />

to all applications requiring low VOC<br />

levels and reliable workability.<br />

4<br />

<strong>VINNAPAS</strong> ® H –<br />

the class for outstanding water<br />

repellency:<br />

These <strong>VINNAPAS</strong> ® polymer powders<br />

feature remarkable hydrophobic properties.<br />

They excel as base mortars for all<br />

types of plasters and grout mortars as<br />

well as for exterior insulation and finish<br />

systems.<br />

New Names Mean New Opportunities.<br />

Effective immediately, the name of every<br />

<strong>VINNAPAS</strong> ® grade will indicate its<br />

product class. You will thus be able to<br />

recognize a grade’s key properties and<br />

suitability right away. For even greater<br />

clarity, we have simplified the entire<br />

nomenclature.<br />

Take, for example: <strong>VINNAPAS</strong> ® 5010 N<br />

50: specifies the base polymer<br />

(here: VAC/E)<br />

10: flexibility (here: hard)<br />

N: Product Class N<br />

(neutral effect on rheology)<br />

The New and Former Names<br />

New name Former name<br />

5010 N RE 5010 N<br />

5024 N RE 524 Z<br />

5028 N RE 5028 N<br />

5044 N RE 5044 N<br />

7055 N LL 5055<br />

7220 N LL 7200<br />

7034 N RE 5034 N<br />

5012 T RE 5012 T<br />

5021 T RE 530 Z<br />

5046 T RE 546 Z<br />

7037 T LL 5037<br />

5011 L RE 5011 L<br />

5023 L RE 523 Z<br />

5025 L RE 525 Z<br />

7014 F LL 5014<br />

7016 F LL 5016<br />

7031 H LL 5031<br />

8031 H RI 551 Z<br />

8034 H RI 554 Z<br />

First-Class Service<br />

If you have any questions, please contact<br />

our <strong>VINNAPAS</strong> ® experts. We will be glad<br />

to help.


The cost of construction is primarily<br />

based on labor costs. Therefore,<br />

when architects and building contractors<br />

choose construction materials,<br />

the speed with which they can be applied<br />

on site is an increasingly important<br />

factor. Construction material<br />

manufacturers thus continually face<br />

new challenges. The trend is further<br />

exacerbated by globalization as local<br />

standards are adapted to meet universal<br />

requirements: old formulations<br />

are not up to the job, and developing<br />

new ones is expensive. With<br />

<strong>VINNAPAS</strong> ® , <strong>WACKER</strong> <strong>POLYMERS</strong><br />

offers solutions that can meet<br />

tomorrow’s challenges.<br />

Floor screeds are a good example of<br />

changes in the construction industry.<br />

They are used in many buildings and are<br />

therefore conventional products to some<br />

extent. However, they must meet ever<br />

increasing demands. Processing speed,<br />

material consumption and drying time<br />

are now just as important as adhesion,<br />

surface quality and the load-bearing<br />

strength of the finished screed. To remain<br />

competitive, companies must continually<br />

offer new solutions.<br />

Solutions that Really Work<br />

For over 50 years, <strong>WACKER</strong> <strong>POLYMERS</strong><br />

has offered a steady stream of new<br />

solutions for optimizing existing mortar<br />

systems or making new ones possible.<br />

The latest example is a new generation of<br />

novel binders with plasticizing properties.<br />

The result is one of the widest ranges<br />

of polymer powders and a unique<br />

understanding of the formulation and<br />

use of mortars with different raw materials<br />

in the various climatic regions.<br />

Contents<br />

Self-Leveling Floor Screeds<br />

Application and Definition 6<br />

Floor Screeds: Classes and<br />

Differences 8<br />

Modification with <strong>VINNAPAS</strong> ® 10<br />

New <strong>VINNAPAS</strong> ® Grades 14<br />

Requirements of EN 13813 16<br />

<strong>WACKER</strong> Service 19<br />

Effect of Formulation Ingredients 21<br />

Global Partner 22<br />

<strong>WACKER</strong> at a Glance 23<br />

Available Worldwide<br />

As the world market leader in high-quality<br />

binders, <strong>WACKER</strong> <strong>POLYMERS</strong> has its<br />

own production sites in Europe, the USA<br />

and Asia. Therefore, customers can depend<br />

on rapid availability and low shipping<br />

costs, as well as reliable deliveries with<br />

consistent quality.<br />

Oriented to the Future<br />

<strong>WACKER</strong> <strong>POLYMERS</strong> is geared to<br />

tomorrow’s markets and helps to shape<br />

them. This is ensured by <strong>WACKER</strong>’s<br />

technical centers on all continents, with<br />

their close contacts to research facilities<br />

all over the world and active participation<br />

in standardization committees. Take advantage<br />

of our experience. Don’t hesitate<br />

to contact us.<br />

<strong>WACKER</strong> and <strong>VINNAPAS</strong> ® are registered trademarks of<br />

<strong>Wacker</strong> <strong>Chemie</strong> AG<br />

5


USUALLY INVISIBLE, BUT ALwAYS<br />

INDISPENSABLE<br />

All floor coverings, whether wood,<br />

carpet or tiles, require a sound<br />

subfloor. The quality can only be<br />

ensured if the subsurface is right.<br />

6<br />

Flat Surfaces<br />

Concrete surfaces or floor screeds are<br />

leveled using self-leveling compounds to<br />

eliminate any unevenness or flaws. That<br />

is particularly important for thin elastic<br />

flooring with a glossy surface. For<br />

example, vinyl or linoleum must be laid<br />

on an absolutely flat subsurface since<br />

any unevenness will be obvious. Largeformat<br />

tiles, parquet and laminate floors<br />

also require a sufficiently flat surface.<br />

Absorbent Substrate<br />

Self-leveling floor screeds also provide<br />

a substrate of uniform absorbency on a<br />

variety of subsurfaces including poured<br />

asphalt, anhydrite or cement substrates.<br />

A surface with defined absorbency is<br />

particularly important for laying textile<br />

and elastic floorings using water-based<br />

dispersion adhesives. These very<br />

low-emission adhesives will usually only<br />

set properly on an absorbent substrate.


Self-leveling compounds must meet a<br />

host of different requirements under<br />

various conditions and in combination<br />

with widely different materials.<br />

The new EN 13318 European standard<br />

defines the term “screed”, but does<br />

not specify a minimum thickness. The<br />

standard therefore also applies to thinly<br />

applied self-leveling filler compounds for<br />

interior use. The definition of a screed<br />

and some of its most important properties<br />

are summarized below.<br />

1 Screed:<br />

One or more layers of mortar laid in<br />

situ, directly onto a base, bonded or<br />

unbonded, or onto an intermediate<br />

layer or insulation layer, to fulfill one or<br />

more purposes:<br />

– to obtain a defined level<br />

– to carry the final flooring<br />

– to provide a wearing surface<br />

2 Polymer-modified cement screed:<br />

Screed with a cement binder and<br />

containing polymer dispersion or a<br />

polymer powder as additive.<br />

3 Self-smoothing:<br />

Capacity of a screed mortar to form a<br />

smooth surface.<br />

4 Self-leveling:<br />

Capacity of a screed mortar to form a<br />

flat and horizontal surface.<br />

5 Leveling coat:<br />

A layer for leveling out uneven surfaces<br />

and differences in height in the<br />

supporting surface or installations<br />

such as pipes.<br />

6 <strong>Smooth</strong>ing layer:<br />

Thin coat applied to a screed to<br />

provide a smooth and/or level surface<br />

to receive flooring.<br />

7


TOP PERFORMANCE IN MANY CLASSES<br />

Classification by Consistency and<br />

Layer Thickness<br />

Flooring compounds can be classified<br />

according to their consistency as self-<br />

leveling or non-slump. Self-leveling<br />

com pounds are used for smoothing and<br />

leveling over large areas. Non-slump<br />

compounds are used for forming<br />

gradients or repairing damaged spots.<br />

8<br />

Table 1: Classification According to Consistency and Layer Thickness<br />

Flooring Compound Layer thickness Consistency<br />

Fine grouts and smoothing compounds 0 – 5 mm Self-leveling<br />

Leveling compounds 3 – 8 mm Self-leveling<br />

Leveling mortars 8 – 20 mm Self-leveling<br />

Fillers 2 – 35 mm Non-slump<br />

Classification According to Binder<br />

System<br />

Cementitious floor screeds can additionally<br />

be classified according to the binder<br />

system used.<br />

Normal-Setting Systems:<br />

The simplest and most economical<br />

products are normal-setting Portland<br />

cement-based systems. Because of the<br />

Portland cement, these systems have<br />

pot lives of several hours but are much<br />

poorer in developing mechanical strength<br />

and have slower drying time.<br />

Fast-Setting Systems:<br />

Over the years, manufacturers of construction<br />

chemicals have had to continually<br />

adapt to new challenges such as changes<br />

in substrates and shorter construction<br />

times. In response, they have developed<br />

special mortars for fast-setting systems<br />

over recent decades. For example,<br />

blending normal Portland cement with<br />

aluminate cement is an excellent way<br />

of accelerating the setting and strength<br />

de velopment. The two cements have<br />

strong mutual effects which cause the<br />

mixture to set and develop its strength<br />

faster than when one type of cement is<br />

used on its own. The extent of the acceleration<br />

depends on the mixing ratio<br />

and additives used. In an extreme case,<br />

the formulation can be adjusted to start<br />

hardening within a few seconds.<br />

Fast-Drying Systems:<br />

The addition of calcium sulfate offers<br />

further benefits. With the proper composition<br />

and control by means of additives,<br />

the mineral “ettringite” is formed. This<br />

mineral can chemically bind a large<br />

proportion of the gauging water added.<br />

So only a small portion of the gauging<br />

water evaporates. This rapidly reduces the<br />

overall moisture content of the resulting<br />

surface which allows for faster installation<br />

of the desired floor covering.<br />

The formation of ettringite crystals also<br />

leads to volume expansion and consequently<br />

to compensation of shrinkage<br />

processes and a reduced tendency to<br />

crack (see Graph 1).


Shrinkage/Expansion (mm/m)<br />

Graph 1: Shrinkage/Expansion Depending on the Cementitious Binder System<br />

0.5<br />

0<br />

-0.5<br />

-1<br />

-1.5<br />

-2<br />

-2.5<br />

0 10 20 28 30 40 50 56<br />

Portland/HAC/sulfate agent T (high HAC content) Portland cement system<br />

Portland/HAC/sulfate agent F (high Portland cement content)<br />

Ettringite formation, and hence the<br />

drying time, can be adjusted by varying<br />

the ratio of Portland cement (PC) to alumina<br />

cement (HAC).<br />

Three Crucial Advantages of Ettringite-<br />

Forming Systems<br />

Onset of setting and development of<br />

mechanical strength take place earlier<br />

Fast drying<br />

Shrinkage is compensated and cracking<br />

reduced<br />

Conditioning (days)<br />

Hindered shrinkage on a shrinkage bar, size 1,000 x 50 x 10 mm. Conditioning: 28 days<br />

standard climatic conditions (23 °C/50 % rel. humidity), followed by 28 days in water.<br />

Synthetic Super-Plasticizers<br />

The introduction of the “EMICODE ® EC1”<br />

ECO label by GEV (Gemeinschaft Emissionskontrollierte<br />

Verlegewerkstoffe e. V.)<br />

for flooring compounds at first led to a<br />

move away from melamine and naphthalene<br />

sulfonates towards polycarboxylate<br />

ether in Germany. This trend can be<br />

expected to spread throughout Europe<br />

as European standards also influence<br />

emission control requirements. Another<br />

reason for converting to polycarboxylate<br />

ether is the reduction of shrinkage<br />

compared with other super-plasticizers.<br />

Casein<br />

Self-leveling compounds based on the<br />

natural super-plasticizer casein have<br />

unique flow and self-healing properties.<br />

However, the emission of ammonia under<br />

alkaline conditions caused by the cement<br />

has led to a switch to melamine and<br />

naphthalene sulfonate super-plasticizers,<br />

for example, in Scandinavia. The rest of<br />

Europe, too, is seeking alternatives to<br />

casein because of problems with availability<br />

and quality fluctuations.<br />

9


<strong>VINNAPAS</strong> ® : THE ANSwER TO MANY<br />

REQUIREMENTS<br />

Self-leveling flooring screeds have<br />

extremely complex compositions and<br />

must meet a wide range of demands.<br />

The trend towards rapid construction<br />

techniques means that the products<br />

must set and develop their strength<br />

very rapidly. At the same time,<br />

applicators require extremely long pot<br />

lives. Last but not least, a high quality<br />

result is required. <strong>VINNAPAS</strong> ® polymer<br />

powders contribute to meeting these<br />

complex requirements.<br />

Flooring Compound Requirements<br />

(Fresh Mortar)<br />

Self-leveling and self-smoothing<br />

No segregation<br />

Good application properties (can be pumped)<br />

Long pot life followed by rapid strength<br />

development<br />

Fast setting and drying to save time and<br />

labor costs<br />

Flooring Compound Requirements<br />

(Hardened Mortar)<br />

<strong>Smooth</strong>, defect-free, non-porous surface<br />

Homogeneous coating (no skinning over)<br />

Good adhesion to all substrates<br />

High abrasion resistance and surface hardness<br />

Low shrinkage and crack-free setting<br />

Low emissions (EMICODE ® EC1 acc. GEV)<br />

10<br />

Modification with Binders<br />

Modern self-leveling compounds are<br />

based on special hydraulic binders that<br />

harden rapidly without shrinking and resist<br />

cracking. Due to cost, it is desirable to<br />

apply self-leveling compounds relatively<br />

thin. Polymer binders make this possible<br />

by improving tensile adhesive strength,<br />

abrasion resistance and flexural strength.<br />

Optimum Solution: Dispersible Polymer<br />

Powders<br />

<strong>VINNAPAS</strong> ® polymer powders do more<br />

than improve the mechanical properties<br />

of leveling compounds. Together with<br />

super-plasticizers and cellulose ethers,<br />

they act as a kind of rheological additive,<br />

improving flow properties and reducing<br />

segregation.<br />

As an extra benefit, they optimize the<br />

self-healing effect, ensuring that a<br />

monolithic surface results where the<br />

compound flows together.


Better Properties<br />

Polymer binders added in the form of<br />

polymer powders can significantly<br />

enhance the properties of self-leveling<br />

flooring compounds. The improvements<br />

achieved by modification with polymer<br />

powders were investigated on an existing<br />

formulation comprising the mineral<br />

binders Portland cement/high-alumina<br />

cement/anhydrite and a large number<br />

of other components, as well as varying<br />

concentrations of polymer powders.<br />

Some crucial properties of self-leveling<br />

flooring compounds were significantly<br />

improved, depending on the amount<br />

of <strong>VINNAPAS</strong> ® polymer powder used.<br />

Compressive and Flexural Strength<br />

The compressive strength depends on the<br />

water/cement ratio and air-pore content,<br />

as well as the distribution of air pores.<br />

If the addition of polymer leads to a<br />

reduction in the water/cement ratio or<br />

air-pore content, the compressive<br />

strength of the system is increased. But<br />

if the air-pore content and water/cement<br />

ratio remain constant, addition of a<br />

polymer will tend to reduce the compressive<br />

strength (see Graph 2).<br />

By contrast, the flexural strength of selfleveling<br />

compounds is increased by the<br />

addition of polymer powders. The higher<br />

the polymer content, the greater the<br />

effect. By forming resin bridges between<br />

the fillers and hydrate phases of the<br />

cement, the polymer binder increases<br />

the cohesion of the system and therefore<br />

the flexural strength (see Graph 3).<br />

Graph 2: Compressive Strength<br />

compressive strength<br />

80<br />

70<br />

60<br />

50<br />

40<br />

30<br />

20<br />

10<br />

0<br />

0 1 2 2.5 4<br />

<strong>VINNAPAS</strong> ® L on dry-mix mortar (%)<br />

Prisms 160 x 40 x 40 mm, conditioned for<br />

28 days under standard climatic conditions<br />

(23 °C/50 % rel. humidity).<br />

With constant water/cement ratio and unchanged<br />

air-pore content, polymers reduce<br />

the compressive strength.<br />

The ratio between the compressive<br />

strength and flexural strength correlates<br />

with the cracking tendency. Since polymer<br />

powders reduce the compressive strength<br />

of self-leveling compounds while at the<br />

same time increasing their flexural<br />

strength, the ratio becomes smaller and<br />

cracking is reduced (see Graph 4).<br />

Graph 3: Flexural Strength<br />

flexural strenght (N/mm 2 )<br />

9<br />

8<br />

7<br />

6<br />

5<br />

4<br />

3<br />

2<br />

1<br />

0<br />

0 1 2 2.5 4<br />

<strong>VINNAPAS</strong> ® L on dry-mix mortar (%)<br />

Prisms 160 x 40 x 40 mm, conditioned for<br />

28 days under standard climatic conditions<br />

(23 °C/50 % rel. humidity).<br />

Increasing the polymer/cement ratio<br />

increases the flexural strength.<br />

Graph 4: Compressive/Flexural Strength<br />

compressive/flexural strength ratio<br />

16<br />

14<br />

12<br />

10<br />

8<br />

6<br />

4<br />

2<br />

0<br />

0 1 2 2.5 4<br />

<strong>VINNAPAS</strong> ® L on dry-mix mortar (%)<br />

The higher the polymer/cement ratio, the<br />

better the compressive/flexural strength<br />

ratio, and therefore the lower the susceptibility<br />

to cracking.<br />

11


Tensile Strength and Elongation<br />

The deformability of polymer-modified<br />

self-leveling compounds can be<br />

demonstrated by a tensile test. At higher<br />

polymer contents, the tensile strength<br />

and elongation on failure are greater.<br />

The higher deformability reduces the risk<br />

of cracking and helps to compensate for<br />

applied stresses.<br />

For example, polymer modification can<br />

improve the absorption both of stresses<br />

generated as the coating dries and of<br />

deformations to the underfloor beneath<br />

the leveling compound (see Graph 5).<br />

Abrasion Resistance of Self-Leveling<br />

Flooring Compounds<br />

The improvement in deformability obtained<br />

by modification with dispersible polymer<br />

powder also helps to compensate for<br />

dynamic loading, such as that caused<br />

by rolling or maneuvering wheels – e. g.<br />

a turning fork-lift truck. The wear test for<br />

abrasion-resistant coatings according to<br />

EN 13982-5 uses a single steel wheel<br />

with a load of 2,000 Newtons. The steel<br />

wheel is moved back and forth on the<br />

surface of the test substrate in two<br />

mutually perpendicular directions. After<br />

10,000 cycles of the steel wheel, the<br />

degree of abrasion is determined both<br />

gravimetrically and volumetrically based<br />

on the resulting surface profile. The test<br />

is carried out after conditioning for 28<br />

days under standard climatic conditions.<br />

12<br />

Graph 5: Tensile Strength and Elongation<br />

5<br />

4<br />

3<br />

2<br />

1<br />

0<br />

Tensile strength<br />

tensile strength (N/mm2 ); Elongation at break (mm • 10 -1 Elongation<br />

)<br />

Zero 1 % <strong>VINNAPAS</strong> ® L 2 % <strong>VINNAPAS</strong> ® L 2.5 % <strong>VINNAPAS</strong> ® L 4 % <strong>VINNAPAS</strong> ® L<br />

Increasing the polymer/cement ratio increases the tensile strength and deformability and<br />

therefore the load-bearing strength.


Abrasion test based on EN 13892-5<br />

Tensile Adhesive Strength<br />

The quality of self-leveling flooring<br />

depends on how well it bonds to<br />

the substrate. <strong>VINNAPAS</strong> ® polymer<br />

powders can ensure an excellent bond.<br />

(see Graph 6).<br />

The higher the proportion of <strong>VINNAPAS</strong> ®<br />

polymer powder, the better the adhesion<br />

to the substrate. For substrates such as<br />

wood or metal, which are difficult to bond<br />

to, larger amounts of polymer must be<br />

used. At the same time, polymer powders<br />

improve the plasticity of the mortar, and<br />

therefore ensure good bonding to the<br />

substrate even under the stresses resulting<br />

from the different coefficients of thermal<br />

expansion and movement of the substrate.<br />

Surface profile after the abrasion test,<br />

unmodified<br />

Graph 6: Tensile-adhesive strength<br />

tensile-adhesive strength<br />

(N/mm2 )<br />

2.5<br />

2.0<br />

1.5<br />

1.0<br />

0.5<br />

0<br />

0 1 2<br />

2.5 4<br />

6<br />

8<br />

on concrete on wood<br />

Surface profile after the abrasion test,<br />

modified with <strong>VINNAPAS</strong> ® polymer powder<br />

<strong>VINNAPAS</strong> ® L on dry-mix mortar (%)<br />

Conditioned for 28 days under standard climatic conditions (23 °C/50 % rel. humidity)<br />

13


POLYMER POwDERS THAT DO MORE<br />

14<br />

Excellent Flow – a Perfect Surface<br />

<strong>VINNAPAS</strong> ® L polymer powders that<br />

were specially developed for self-leveling<br />

flooring compounds improve both, the<br />

mechanical properties and the flow<br />

properties. They achieve very smooth,<br />

defect-free surfaces when used in<br />

combination with casein and synthetic<br />

super-plasticizers such as polycarboxylate<br />

ethers, melamine or naphthalene sulfonate<br />

condensates, and lignin sulfonates.<br />

They also reduce surface bleeding and<br />

segregation.<br />

New: Both a Binder and a Super-<br />

Plasticizer<br />

The latest generation of <strong>VINNAPAS</strong> ® F<br />

polymer powders for self-leveling flooring<br />

compounds and screeds are novel<br />

binders of a high-quality polymer binder<br />

with flow characteristics. For standard<br />

compounds, the polymer reduces the<br />

number of components in the formulation,<br />

simplifying handling and logistics. Of<br />

course, these products have very low<br />

emissions, are free of ammonia and<br />

formaldehyde, and therefore suitable for<br />

formulating products that comply with<br />

EMICODE ® EC1.


Super-Plasticizer Properties<br />

The super-plasticizing effect of these<br />

new innovative products is the result of<br />

a unique combination of properties and<br />

is immediately noticeable once the compound<br />

has been mixed. This feature is<br />

particularly advantageous for pumpable<br />

compounds, where mechanical mixing<br />

means that mix times are extremely short.<br />

The rapid dispersion of the dispersible<br />

polymer powder also reduces the risk<br />

of adding too much gauging water. This<br />

reduces the efflorescence at the surface.<br />

Another advantage of a binder with these<br />

additional properties is that it reduces<br />

shrinkage of cementitious flooring compounds<br />

and screeds.<br />

The new <strong>VINNAPAS</strong> ® F polymer powders<br />

with flow characteristics combine the<br />

properties of both, traditional and modern<br />

synthetic super-plasticizers (e. g. melamine<br />

sulfonate and polycarboxylate) and casein.<br />

Binder Properties<br />

<strong>VINNAPAS</strong> ® F polymer powders with flow<br />

characteristics are based on the new<br />

generation of vinyl acetate/ethylene/<br />

methyl methacrylate (VAc/E/MMA) terpolymers.<br />

In self-leveling flooring compounds<br />

and screeds, they provide excellent<br />

mechanical properties, measurable as<br />

compressive and flexural strength.<br />

Modifying self-leveling flooring compounds<br />

with <strong>VINNAPAS</strong> ® F polymer powders<br />

with flow characteristics also leads<br />

to high abrasion resistance in the wear<br />

tests required by the new European<br />

standards on screeds.<br />

With the appropriate formulation, this<br />

technique can be used to formulate<br />

cementitious industrial flooring for indoor<br />

and outdoor use.<br />

More flexible systems can be formulated<br />

by adding <strong>VINNAPAS</strong> ® N or <strong>VINNAPAS</strong> ® L<br />

opolymer powders, which have excellent<br />

compatibility with one another.<br />

15


NEw STANDARDS AND GUIDELINES<br />

POINT THE wAY AHEAD<br />

Flooring compounds and screeds<br />

perform important functions in a<br />

building. They are therefore closely<br />

regulated by official standards. Legal<br />

requirements will become ever more<br />

detailed in the near future as a result<br />

of the harmonization of standards.<br />

16<br />

Applicability of EN 13813<br />

In contrast to the German DIN 18560,<br />

parts 1 – 7 that have so far applied,<br />

EN 13813 defines the term “screed”<br />

to include thin floor coverings such as<br />

cementitious self-leveling flooring<br />

compounds or synthetic resin systems.<br />

It is not desirable to limit the thicknesses,<br />

i. e. the new standard covers all coatings,<br />

floorings and screeds.<br />

Coatings with special properties to protect<br />

load-bearing structural concrete elements<br />

against damage have to fulfill additional<br />

requirements of prEN 1504-2.<br />

EN 13813 defines the requirements on<br />

screed mortars used for floor constructions<br />

in interiors. It therefore explicitly does<br />

not apply to outdoor applications.<br />

In Europe, EFNARC (European Federation<br />

for Specialist Construction Chemicals<br />

and Concrete Systems) publishes a<br />

specification and guidelines for polymer-<br />

modified cementitious flooring as wearing<br />

surfaces.<br />

Table 2: Minimum Requirements<br />

EN 13813 EFNARC<br />

Flexural strength<br />

in N/mm 2 acc. to<br />

EN 13892-2 1 5<br />

Compressive strength<br />

in N/mm 2 acc. to<br />

EN 13892-2 5 20<br />

Wear resistance<br />

acc. to:<br />

Böhme A22 –<br />

BCA AR6 AR2<br />

Rolling Wheel RWA300 RWA10


Table 3: EN 13813 – The New European Standard for Floor Screeds and Self-Leveling Compounds<br />

Screed mortar based on: Cement Calcium Sulfate Magnesite Cast Asphalt Synthetic resin<br />

Compressive strength N N N – •<br />

Flexural strength N N N – •<br />

Wear resistance acc. to Böhme Na Wear resistance acc. to BCA N<br />

• • • –<br />

a • • • Na Wear resistance acc. to Rolling Wheel Na • • • Na } one out of three<br />

one out of two{<br />

Surface hardness • • N a – •<br />

Resistance to Indentation – – – N –<br />

Rolling wheel resistance of screeds with floor covering • • • • •<br />

Setting time • • – – –<br />

Shrinkage and expansion • • • – •<br />

Consistency • • • – •<br />

pH value • N • – –<br />

Modulus of elasticity • • • – •<br />

Impact resistance • a – – – N a<br />

Bond strength • • • – N<br />

N = Normative<br />

• = Optional, if applicable<br />

– = Not applicable<br />

a = Only for screed mortars intended for wearing surfaces<br />

17


18<br />

Emission Levels for Cementitious<br />

Flooring Compounds<br />

A large number of test methods and<br />

definitions exist for assessing the hazard<br />

potential with respect to indoor air.<br />

Based on a German initiative, the<br />

EMICODE ® classification has become<br />

established. It is based on measurements<br />

of carcinogens, suspected<br />

carcinogens and VOC levels in flooring<br />

compounds. The test methods<br />

underlying the EMICODE ® classification<br />

are to be incorporated in a similar form<br />

into European and international standards.<br />

Low Emissions<br />

All <strong>VINNAPAS</strong> ® polymer powders for<br />

flooring compounds are free of superplasticizers<br />

and meet the requirements<br />

for very low-emission products<br />

according to EMICODE ® EC1.


wITH wACKER YOU MAKE THE GRADE<br />

<strong>WACKER</strong> <strong>POLYMERS</strong> supports<br />

customers with questions on whether<br />

changes to standards make it<br />

necessary to modify formulations. In<br />

many cases, the answer comes from<br />

experience. If not, then the scientists<br />

at our technical centers will test your<br />

formulations for compliance with the<br />

standards.<br />

We can even do this under the actual<br />

conditions of your target market,<br />

since <strong>WACKER</strong> has a worldwide<br />

presence.<br />

19<br />

Abrasion Tests<br />

New test methods for the wear properties<br />

of cementitious compounds utilized as<br />

wear layers are defined in the European<br />

standards for screeds and flooring<br />

compounds. There are three such test<br />

methods, each based on the specific<br />

experiences and traditions of individual<br />

EU countries.<br />

19


EN 13892-3<br />

Wear resistance acc. to Böhme<br />

Wear resistance acc. to Böhme<br />

class abrasion in cm 3 /50 cm 2<br />

A22 22<br />

A15 15<br />

A12 12<br />

A9 9<br />

A6 6<br />

A3 3<br />

A1.5 1.5<br />

see also requirements on page 16<br />

20<br />

EN 13892-4<br />

Wear resistance acc. to BCA<br />

Wear resistance acc. to BCA<br />

class depth of abrasion in µm<br />

AR6 600<br />

AR4 400<br />

AR2 200<br />

AR1 100<br />

AR0.5 50<br />

see also requirements on page 16<br />

EN 13892-5<br />

Wear resistance acc. to Rolling Wheel<br />

Wear resistance acc. to Rolling Wheel<br />

class abrasion in cm 3<br />

RWA300 300<br />

RWA100 100<br />

RWA20 20<br />

RWA10 10<br />

RWA1 1<br />

see also requirements on page 16


FORMULATION MADE EASY<br />

The shrinkage bar shows the benefits of<br />

shrinkage compensators.<br />

Determination of shrinkage under practical<br />

conditions.<br />

Beside polymer binders in the form of<br />

<strong>VINNAPAS</strong> ® polymer powders, selfleveling<br />

flooring compounds also<br />

contain a large number of other<br />

additives in the product formulation.<br />

These additives are required to improve<br />

the development of mechanical<br />

strength, reduce drying time, compensate<br />

for shrinkage, etc. as needed for<br />

the end application. You can take<br />

advantage of our extensive experience<br />

in this field.<br />

At our technical centers, our scientists<br />

will be glad to assist you in formulating<br />

and testing your self-leveling flooring<br />

compounds.<br />

The effect of super-plasticizers is tested<br />

with the flow ring.<br />

21


YOUR GLOBAL PARTNER FOR LOCAL<br />

SOLUTIONS<br />

<strong>WACKER</strong> offers you a local presence<br />

worldwide. Across five continents<br />

you can draw on the expertise of local<br />

staff, who are in turn supported by a<br />

global network.<br />

The advantages you gain include<br />

our unique expertise, acquired in over<br />

50 years of experience in a broad<br />

spectrum of applications and markets.<br />

22<br />

Reliable Deliveries and Customer<br />

Proximity<br />

We have our own production sites in<br />

Europe, the USA and Asia, which reduce<br />

transit times and ensure reliable deliveries<br />

while maintaining consistent quality.<br />

Standard-Specific Tests<br />

Specialists from our technical centers<br />

support your optimization of existing<br />

formulations and the development of<br />

new products. For instance, if you so wish,<br />

we will perform any legally prescribed<br />

tests with local raw materials based on<br />

your guideline formulations. In the case<br />

of self-leveling flooring, these tests<br />

particularly include:<br />

– Abrasion resistance by the BCA,<br />

Rolling Wheel or Böhme test<br />

– Compressive and flexural strength<br />

according to EN 13892-2<br />

A Partner for Innovations<br />

<strong>WACKER</strong> is active in standardization<br />

committees worldwide, collaborating<br />

closely with universities and regularly<br />

partnering with research institutes to<br />

develop projects. This experience makes<br />

us an ideal partner for innovations which<br />

we gladly initiate and implement in<br />

cooperation with you. Don’t hesitate to<br />

contact us!


YOUR GLOBAL PARTNER FOR LOCAL<br />

SOLUTIONS<br />

<strong>WACKER</strong> offers you a local presence<br />

worldwide. Across five continents<br />

you can draw on the expertise of local<br />

staff, who are in turn supported by a<br />

global network.<br />

The advantages you gain include<br />

our unique expertise, acquired in over<br />

50 years of experience in a broad<br />

spectrum of applications and markets.<br />

22<br />

Reliable Deliveries and Customer<br />

Proximity<br />

We have our own production sites in<br />

Europe, the USA and Asia, which reduce<br />

transit times and ensure reliable deliveries<br />

while maintaining consistent quality.<br />

Standard-Specific Tests<br />

Specialists from our technical centers<br />

support your optimization of existing<br />

formulations and the development of<br />

new products. For instance, if you so wish,<br />

we will perform any legally prescribed<br />

tests with local raw materials based on<br />

your guideline formulations. In the case<br />

of self-leveling flooring, these tests<br />

particularly include:<br />

– Abrasion resistance by the BCA,<br />

Rolling Wheel or Böhme test<br />

– Compressive and flexural strength<br />

according to EN 13892-2<br />

A Partner for Innovations<br />

<strong>WACKER</strong> is active in standardization<br />

committees worldwide, collaborating<br />

closely with universities and regularly<br />

partnering with research institutes to<br />

develop projects. This experience makes<br />

us an ideal partner for innovations which<br />

we gladly initiate and implement in<br />

cooperation with you. Don’t hesitate to<br />

contact us!


<strong>Wacker</strong> <strong>Chemie</strong> AG<br />

Hanns-Seidel-Platz 4<br />

81737 München, Germany<br />

Tel. +49 89 6279-0<br />

Fax +49 89 6279-1770<br />

info.polymers@wacker.com<br />

www.wacker.com/vinnapas<br />

6143e/05.08 supersedes 6143e/12.06

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