Process of preparing polyurethanes cured with 2,6-idaminobenzoic acid derivatives and blends of the 2, 4 and 2,6 isomers
US4810769A · kind A · utility
2Cited by
13References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 5, 1987 |
| Grant date | Mar 7, 1989 |
| Priority date | — |
| Expiry date | Jun 5, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/10
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to polyurethanes and a method for making polyurethanes by reacting an organic diisocyanate, a glycol having a molecular weight of 500-5000 and a derivative of 2,6-diaminobenzoic acid or a blend comprising derivatives of 2,4-diaminobenzoic acid and 2,6-diaminobenzoic acid. The addition of the 2,6-diaminobenzoic acid derivative to the composition improves polyurethane processability and performance by decreasing chain extender reactivity and increasing hard segment regularity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.