Chain extenders for polyurethanes
US4931487A · kind A · utility
12Cited by
44References
38Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 4, 1988 |
| Grant date | Jun 5, 1990 |
| Priority date | — |
| Expiry date | Mar 4, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2120/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Polyurethanes are produced from compositions comprising at least one relatively high equivalent weight component and at least one chain extender selected from the group consisting of heterocyclic diamines, diaromatic disulfides, alkyl ethers of halogen-substituted aromatic diamines, polysubstituted alkyl diamines and alkyl acid esters of halogen-substituted diamino phenols of designated structures. Polyurethanes having high thermal stability, high tear strength and high modulus are produced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.