Paints and Coatings Auxiliaries for the coating of surfaces - Clariant

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General information on the processing of waxes The waxes described here are insoluble at room temperature in the common paint solvents. They dissolve only at elevated temperatures in aromatic and a number of aliphatic solvents, mainly nonpolar hydrocarbons. When the wax/solvent mixture cools, the wax precipitates with varying degrees of crystallinity and remains finely dispersed in the solvent. By altering the type and quantity of the components and the dispersion method, it is possible to vary the dispersing operation considerably so as to achieve differences in the structure of the particles and the degree of dispersion and thus in the consistency of the dispersion. Similar fine dispersions can be produced using Ceridust without hot precipitation. These micronized powders offer the following advantages: > No heating of wax and solvent required. > No solvent vapours arise. > The risk of fire is reduced to a minimum. > Necessary dispersing machines are in operation for a short time only, thus saving time and energy. > Processing is environmentally safe. 18 Additions of 1% to 5 % wax, relative to the ready-to-use paint, have proved successful in practice. Higher additions are likely to cause impairment of the paint film in the form of chalking, cratering, pinholing and deterioration of recoating properties and intercoat adhesion. Licowax PE 520 The Licowax PE 520, which is supplied in the form of granules, fine grain and powder, cannot be incorporated directly into paint systems. It is necessary first to produce fine wax particles by dissolving and precipitating the product. The following methods are suitable: > Hot precipitation Heat 2 parts by weight Licowax PE 520 with 18 parts by weight solvent, mainly composed of aromatics, to about 100 °C; the resultant solution must be clear. Stir this solution into 80 parts by weight cold paint. With this procedure the wax is precipitated in the paint in a very finely dispersed form and has hardly any tendency to settle. > Preparation of a wax dispersion An approx. 10 % dispersion in xylene can be prepared by the following simple method: Heat 10 parts by weight Licowax PE 520 and 30 parts by weight xylene to about 100 °C, thereby dissolving the wax. After cooling the solution to about 96 °C stir into 60 parts by weight cold xylene. 1% to 5 % wax in the paint is recommended depending on the matt effect required.
Licowax PED 521, Licowax PED 522 Dissolve 20 to 30 parts by weight Licowax PED 521 or Licowax PED 522 at about 90 °C in 80 to 70 parts by weight xylene or white spirit. Cool the hot solution to room temperature with slight stirring and incorporate in the paint (page 25). Licowax 371 FP Heat 6 parts by weight Licowax 371 FP and 30 parts by weight xylene to 100 °C and cool while stirring to 75 °C. After reaching this temperature, the solution is diluted with 64 parts by weight butyl acetate 98/100 % while stirring and cooled to room temperature. The wax content in the finished paint should be about 1-2 %. Ceridust 9615 A, Ceridust 6721 The micronized powders can be stirred directly into the paint. A minimum mixing time of 15 minutes is advisable to ensure satisfactory wetting of the individual wax particles (page 22). However, it is expedient first to prepare a stock paste. It is sufficient to admix 20-30 % Ceridust micropowder with a suitable solvent and to stir the batch for about 15 minutes. Very homogeneous dispersions with good stability to settling are obtained by the additional use of a small amount of binder. This procedure is particularly recommended when other paint additives such as silica are also included in the paint formulation. 19
Page 1 and 2: Pigments & Additives Division Coati
Page 4 and 5: Function of waxes Waxes are incorpo
Page 6 and 7: 6 Ceridust TP Ceridust 9322 F Cerid
Page 8 and 9: Product range Waxes and wax micropo
Page 10 and 11: Properties 1) Ester waxes based on
Page 12 and 13: Ester waxes based on crude montan w
Page 14 and 15: Test methods Drop point DIN 51 801/
Page 16 and 17: Table 1 Test results with a paint r
Page 20 and 21: Ceridust 3910 Ceridust 3910 has ver
Page 22 and 23: UV reactive waxes TP Ceridust 5091,
Page 24 and 25: Polyurethane finishes > One-pack sy
Page 26 and 27: Wood wax (aqueous) These are unpigm
Page 28 and 29: Safety data Toxicological propertie
Page 30 and 31: Transport and storage Packaging > L
Page 32: Please note This information is bas

Paints and Coatings Auxiliaries for the coating of surfaces - Clariant

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