Elastomeric polyurethane-polyurea polymer prepared from an organic polyisocyanate a polyol and an aromatic diamine having at least one of the ortho positions to each amine lower alkyl
US4296212A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 27, 1980 |
| Grant date | Oct 20, 1981 |
| Priority date | — |
| Expiry date | Aug 27, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S264/83
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Elastomeric polyurethane-polyurea polymers are disclosed that are derived from the reaction of organic polyisocyanates with A. primary hydroxyl polyols having a functionality of 2 to 4 and a molecular weight from 1500 to 12000, and B. extender mixtures comprised of 1. an aromatic diamine wherein at least one of the positions ortho to each amine group is substituted by a lower alkyl group, and 2. a lower molecular weight diol, provided that the aromatic diamine comprises from 5 to 45 percent by weight of the extender mixture and the balance comprises the diol. The polymers find particular utility in the preparation of reaction injection molded parts, particularly, automotive parts because of their excellent flexural modulus, tensile, and tear properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.