Polyisocyanate prepolymers from scrap polyester and polyurethane foam products obtained therefrom
US4048104A · kind A · utility
47Cited by
4References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 5, 1976 |
| Grant date | Sep 13, 1977 |
| Priority date | — |
| Expiry date | Aug 5, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S528/906
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Polyisocyanate prepolymers for use in preparing polyurethane products elastomers, adhesives and foams, are prepared by combining (1) organic polyisocyanate with (2) polyols which are the hydroxyl-terminated digestion products of (a) waste or scrap polyalkylene terephthalate polymers and (b) organic polyols. Polyurethane products resulting from the polyisocyanate prepolymers exhibit useful and unexpected properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.