Film-forming copolymers and their use in water vapour permeable coatings
US5266403A · kind A · utility
3Cited by
3References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 20, 1992 |
| Grant date | Nov 30, 1993 |
| Priority date | — |
| Expiry date | Aug 20, 2012 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06M15/647
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.