Aromatic polyester-siloxane block copolymers and method for making
US4945147A · kind A · utility
12Cited by
1References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 6, 1989 |
| Grant date | Jul 31, 1990 |
| Priority date | — |
| Expiry date | Mar 6, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/6956
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
There is provided by the present invention aromatic polyester-siloxane block copolymers which can be made by effecting the condensation between tetramethyldisiloxane bisbenzoic acid or acid chloride with a dihydric phenol such as bisphenol A or in combination with a mixture of such tetramethyldisiloxane bisbenzoic acid and aromatic acids, such as terephthalic acid or isophthalic acid. The aromatic polyester-siloxane block copolymers can be used as molding compounds, extruded films, in making composite matrix materials and as flame retardants for aromatic polycarbonates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.