Preparation of siloxane modified polyimide resin
US5237034A · kind A · utility
5Cited by
10References
6Claims
0Family size
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Key dates
| Filing date | Dec 23, 1991 |
| Grant date | Aug 17, 1993 |
| Priority date | — |
| Expiry date | Dec 23, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133723
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A siloxane modified polyimide resin having high heat resistance and processability is prepared by reacting a siloxane diamine of formula (1) and an aromatic diamine of formula (2) with an aromatic tetracarboxylic dianhydride of formula (3) in a polar solvent. ##STR1## wherein, R represents ##STR2## R.sub.1 and R.sub.2 represent aromatic or aliphatic hydrocarbons; n represents an integer of 1 to 1000; PA1 X.sub.1 represents ##STR3## X.sub.2 represents ##STR4##
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.