UCAR® LATEX 163S - Arkema Inc.

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2 UCAR ® Latex 163S UCAR ® Latex 163S is a high solids, all-acrylic binder for high-performance caulks, sealants, and elastomeric coatings. UCAR Latex 163S combines extraordinary adhesion properties, high pigment binding capacity, and excellent exterior durability. This unique combination of performance properties allows the formulator to prepare ASTM C 920 compliant, class A and B sealants. Due to the inherently high pigment binding capacity of UCAR Latex 163S, ASTM C 834 compliant formulations are now available with pigment-to-binder ratios as high as 5:1. Even higher pigment loading levels are being utilized in non-specification painters caulks. UCAR Latex 163S is an enhancement of UCAR Latex 163, a standard of the sealant industry for many years. Only the latex stabilization system has been changed. For those many formulators already familiar with UCAR Latex 163, working with the new (and improved) UCAR Latex 163S will be a pleasant experience. The product maintains all the properties of its predecessor, and the enhanced pigment binding capacity can be utilized to increase profitability. UCAR Latex 163S offers excellent cost-performance properties in elastomeric coatings designed to protect structures from water damage. If these coatings are applied at a sufficient thickness, they will also perform as effective gas barriers. Such coatings may be applied over any vertical surface that does not permit water accumulation. The polymer has inherent anti-rust capabilities that can be beneficial for coatings over ferrous surfaces. Typical Polymer Properties Polymer Type Acrylic Total Solids, % by weight 58.0 Weight per Gallon, lb 8.6 pH Value 4.3 Particle Size, microns 0.3 Viscosity, 25°C, cP (Brookfield, RVT #6, 60 rpm) 300 Glass Transition Temperature, midpoint, °C -11 Minimum Filming Temperature, °C
ASTM C 834 Compliant Low-Cost Caulk Formulation Suggestion K-2222 Ingredients Parts by Weight UCAR ® Latex 163S 224.48 “Santicizer” 160 65.10 Ethylene Glycol 9.14 TRITON ® Nonionic Surfactant X-405 9.14 “Tamol” 850 2.11 “Kathon” LX (1.5%) 0.91 Mineral Spirits 10.55 Water 24.61 “Silane” A-187 1.06 “Drikalite” 650.94 “Ti-Pure” R-902 0.00 CELLOSIZE ® Hydroxyethyl Cellulose ER-15M 1.40 Ammonium Hydroxide (28%) 0.56 TOTAL 1000.00 CAULK PROPERTIES Pigment-to-Binder Ratio 5.00 Pigment to Total Binder 3.33 Plasticizer, phr ASTM C 731 50.00 “Extrudability,” g/sec ASTM C 732 “Aging Effects” 22.08 Wash Out None Slump None Cracking None Loss of Adhesion None Discoloration ASTM C 734 “Low Temperature Flex” Very slight yellowing Unexposed control Pass–no cracking Exposed ASTM C 736 “Extension Recovery” Pass–no cracking First run 85.2%, no adhesion loss Duplicate run ASTM D 2202 90.0%, no adhesion loss “Slump”
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UCAR® LATEX 163S - Arkema Inc.

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