Frosting agent for use with aqueous polyurethane and method for

Details Frosting agent for use with aqueous polyurethane and method for Frosting agent for use with aqueous polyurethane and method for

1993-12-01

1995-12-12

Nakarani, D. S.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

428405, 428406, 428407, 428447, 524591, 524847, C08K 900, B32B 516

Patent

active

054750504

ABSTRACT:
A frosting agent in which particulate silica suspends with high dispersibility without lowering the flow-out and formability of an aqueous polyurethane as a binder of frosting coating agent. Such a frosting agent for use in an aqueous polyurethane is obtained by adding 0.5-5.0 parts by weight of .gamma.-ureidopropyltriethoxysilane and 0.1 part by weight or more of water to 100 parts by weight of particulate silica and reacting said substances at a temperature of 15.degree.-100.degree. C. to modify the surface of said particulate silica. By this reaction, .gamma.-ureidopropylsilane liberated by hydrolysis of ethoxysilane groups reacts with acid hydroxy groups. Thus, the wettability and compatibility of the frosting agent with respect to aqueous polyurethane increases. This improves the dispersibility and the resistance to scuff of the coating.

REFERENCES:
patent: 4436881 (1984-03-01), Laitar
patent: 4482656 (1984-11-01), Nguyei et al.
patent: 4660642 (1987-04-01), Young

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