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

1993-03-08

1994-05-10

Marquis, Melvyn I.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

525453, 525474, 4284231, 428447, D03D 2500

Patent

active

053105974

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 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: 5169906 (1992-12-01), Cray et al.

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