Film-forming copolymers and their use in water vapor permeable c

Details Film-forming copolymers and their use in water vapor permeable c Film-forming copolymers and their use in water vapor permeable c

1991-03-21

1992-12-08

Marquis, Melvyn I.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525474, C08F28300

Patent

active

051699060

ABSTRACT:
A film-forming copolymer is formed by copolymerising 100 parts of a curable polyurethane resin and 10 to 100 parts of an organosilicon compound, consisting essentially of SiO.sub.2, R.sub.3 SiO.sub.1/2 and R'R.sub.2 SiO.sub.1/2 units, the ratio of monovalent units to tetravalent units being from 0.4/1 to 2/1 and from 40 to 90% of and monovalent units being R'R.sub.2 SiO.sub.1/2 units. R is a monovalent hydrocarbon group having up to 8 carbons and R' denotes a OH-terminated polyoxyalkylene group. The invention also includes a method of making fabrics waterproof and permeable to water vapor by coating it with such copolymer.

REFERENCES:
patent: 4011189 (1977-03-01), Keil
patent: 4686137 (1987-08-01), Ward
patent: 4774310 (1988-09-01), Butler

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