Spiro(bis)indane polyamide and polyimide copolysiloxanes and method of preparation
US4950727A · kind A · utility
2Cited by
12References
20Claims
0Family size
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Key dates
| Filing date | Apr 15, 1988 |
| Grant date | Aug 21, 1990 |
| Priority date | — |
| Expiry date | Apr 15, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C65/26
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Linear polyamide and polyimide copolysiloxane compositions are prepared by contacting a strongly acidic catalyst, basic catalyst or alkali metal fluoride with a macrocyclic spirobiindane polyamide or polyimide disiloxane, either alone or in combination with a cyclic polysiloxane such as octamethylcyclotetrasiloxane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.