Rim nylon-based urethane block polymer composition
US4578447A · kind A · utility
3Cited by
11References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 28, 1983 |
| Grant date | Mar 25, 1986 |
| Priority date | — |
| Expiry date | Dec 28, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S264/83
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A two part RIM nylon-based urethane block polymer consists of an anionic metal salt catalyst in minor proportions and a prepolymer consisting of the reaction product of a diisocyanate with a mixture of a polymeric triamine having primary amine groups and a polyether diol in a large excess of a ring lactam which serves as a reaction diluent. The prepolymer preparation process is characterized by the immediate formation of a visible high molecular weight polymer gel which redissolves with continued agitation. No free or extractable polymers, diols or isocyanate is observed in the polymer product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.