Film-forming copolymers and their use in water vapour permeable

Details Film-forming copolymers and their use in water vapour permeable Film-forming copolymers and their use in water vapour permeable

1992-08-20

1993-11-30

Marquis, Melvyn I.

Coating processes

With post-treatment of coating or coating material

Heating or drying

427180, 4273934, 525474, B05D 302

Patent

active

052664031

ABSTRACT:
A film-forming copolymer is formed by copolymerizing 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 all 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 vapour by coating it with such copolymer.

REFERENCES:
patent: 4011189 (1977-03-01), Keil
patent: 4686137 (1987-08-01), Ward
patent: 4774310 (1983-09-01), Butler

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