Water-based composites with superior cure in thick films,...

Details Water-based composites with superior cure in thick films,... Water-based composites with superior cure in thick films,...

C - Chemistry, Metallurgy

09

D

117/186, 400/590

C09D 121/02 (2006.01) C04B 41/48 (2006.01) C04B 41/63 (2006.01) C04B 41/64 (2006.01) C08K 5/5435 (2006.01) C08K 5/544 (2006.01) C09D 157/00 (2006.01) C09D 163/00 (2006.01)

Patent

CA 2031405

ABSTRACT OF THE DISCLOSURE A coating composition is used for coating or overlaying Portland cement concrete or metal. The composition includes a synthetic polymer latex, an amine-functional epoxy curing agent, an epoxy-functional or amine-functional silane, a liquid epoxy resin, and a filler having a fine particle size. The coating composition has superior crack resistance and low cost in compar- ison with epoxy/amine-type polymer concrete, and excellent strength development, chemical resistance, and rapid cure in thick films in comparison with latex-based cementitious composi- tions. The coating composition can be mixed from a pair of storage-stable components; a dry mix including the fine particle size filler and the epoxy resin, and optionally larger size aggregate, and a wet mix including the polymer latex, the silane, and the amine curing agent. The two components can be mixed on site to give a fluid coating composition having a long pot life and low viscosity, which rapidly develops strength, and ulti- mately develops high compressive stength, thermal shock resistance, and resistance to chemical attack, especially attack by aqueous acids.

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