Thermoplastic polyetherester block copolymers
US4914178A · kind A · utility
11Cited by
6References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 30, 1988 |
| Grant date | Apr 3, 1990 |
| Priority date | — |
| Expiry date | Dec 30, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/668
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A polyetherester block copolymer has hard and soft segments of the structural formula ##STR1## wherein D is the non-hydroxylic residue of a saturated aliphatic or cyclic diol having 2 to 8 carbon atoms, R is the non-carboxylic residue of an aromatic of aliphatic or cyclic dicarboxylic acid wherein the residue has a molecular weight less than about 500, and G is a polyether having recurring oxyalkylene units and a molecular weight between about 300 and 4,000, and the polymer is branched as a result of having been made from monomers that include a primary or secondary amino branching agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.