Poly-.alpha.-olefin/polyurethane block copolymers, processes for their production and their use
US5242977A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 19, 1991 |
| Grant date | Sep 7, 1993 |
| Priority date | — |
| Expiry date | Dec 19, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/10
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention is directed to poly-.alpha.-olefin/polyurethane block copolymers which are prepared by reacting PA0 A) isocyanate-reactive functionalized poly-(C.sub.2 -C.sub.10 -.alpha.-olefins) having a number average molecular weight M.sub.w of about 1000 to 350,000, PA0 B) polyisocyanates, isocyanate prepolymers or modified polyisocyanates, and, optionally, PA0 C) isocyanate-reactive synthesis units containing Zerewitinoff-active hydrogen atoms and having a molecular weight of 400 to about 5000 and, optionally, PA0 D) low molecular weight isocyanate-reactive chain extending agents having a molecular weight of 32 to 399. The present invention is also directed to this process for preparing the poly-.alpha.-olefin/polyurethane block copolymers and to their use as polymer dispersants for the production of polymer blends, as primers or modifiers or for the production of moldings or coatings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.