Silicon-containing copolyester and method of producing the same
US4927895A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 28, 1988 |
| Grant date | May 22, 1990 |
| Priority date | — |
| Expiry date | Oct 28, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/695
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Silicon-containing copolyester are in the form of a block copolymers comprising, PA1 (i) between about 1 to 99% by weight of a siloxane segment which is at least one selected from the group consisting of siloxane segments expressed by the following general formulas; ##STR1## where R and R', which may be the same or different, are each hydrocarbon moieties having 1 to 10 carbon atoms, and m is an integer between 1 to 2000; and PA1 (ii) between about 99 to about 1% by weight of a polyester segment which is at least one selected from polyester segments of the following general formulas: ##STR2## where R.sub.1 is at least one radical selected from the group consisting of aromatic bivalent radicals having 6 to 12 carbon atoms and aliphatic bivalent radicals having 4 to 20 carbon atoms, R.sub.2 is at least one radical selected from the group consisting of aromatic bivalent radicals having 6 to 20 carbon atoms, and aliphatic bivalent radicals having 2 to 20 carbon atoms, and n is an integer between 1 and 1000. The block copolymers are advantageously prepared by reacting a polyester with a silicon oil having terminal reactive epoxy moieties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.