Urethane-based water-proofing/sound-proofing coating composition

Details Urethane-based water-proofing/sound-proofing coating composition Urethane-based water-proofing/sound-proofing coating composition

1975-08-15

1977-05-24

Hoffman, James R.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

427136, 427138, 427407R, 428339, 428425, B05D 136, B32B 2740, B32B 1104

Patent

active

040256839

ABSTRACT:
A water-proofing/sound-proofing coating composition comprises, in order, from a surface to be coated (A) a prime coat comprising (1) a paint binder, (2) a heat absorber, comprising a dark, preferably black, pigment, (3) a volatile solvent, and optionally (4) an inert fller, and (B) a membrane coat comprising (1) a polyurethane formed from (a) a mixture of high molecular weight polyols and low molecular weight chain stiffeners and (b) a polyisocyanate, (2) a nonvolatile extender and (3) a volatile solvent. The surfacing composition can also include an overlay of a wearing surface such as an asphalt concrete. A process is also provided for preparing a cast-in-place surfacing composition comprising (A) applying a primer to a surface to be coated, (B) allowing the prime coat to stand for a time sufficient to allow entrained gases to escape from the primed surface, and (C) applying to the surface of the prime coat a membrane-forming coat comprising (1) a mixture of a high molecular weight polyol and a low molecular weight chain stiffener, (2) a substantially inert nonvolatile extender, (3) a polyisocyanate, (4) a volatile solvent, and (5) a polyurethane-forming reaction catalyst.

REFERENCES:
patent: 3110981 (1963-11-01), Larner
patent: 3253521 (1966-05-01), Endres
patent: 3272098 (1966-09-01), Buchholtz et al.
patent: 3499783 (1970-03-01), Nelson et al.
patent: 3756845 (1973-09-01), Zasadny et al.

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