Film-forming copolymers and their use in water vapor permeable coatings
US5169906A · kind A · utility
59Cited by
3References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 21, 1991 |
| Grant date | Dec 8, 1992 |
| Priority date | — |
| Expiry date | Mar 21, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/223
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.