Reaction injection molded polyurethane
US4243760A · kind A · utility
21Cited by
6References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 23, 1979 |
| Grant date | Jan 6, 1981 |
| Priority date | — |
| Expiry date | May 23, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S521/914
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Covers a polyurethane elastomer of improved moldability, particularly useful in RIM applications which comprises the reaction product of an aromatic polyisocyanate, a high molecular weight polyether triol containing an internal mixed propylene oxide-ethylene oxide segment comprising 2-35% ethylene oxide by weight and 65-98% by weight of propylene oxide and an ethylene oxide cap such that said polyol has a primary hydroxyl content greater than 50% and preferably greater than 90%, and a chain-extending agent. Also covers the method of making said elastomer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.