Heat resistant resin composition and process for producing the same
OwnerYuichi Satsu, Akio Takahashi +5inventors
InventorsYuichi Satsu, Akio Takahashi, Harukazu Nakai, Masao Suzuki, Yuzo Ito, Shuichi Oohara, Takao Miwa
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Abstract
A heat resistant resin composition obtained by heat treating a poly(amic acid) varnish comprising a poly(amic acid), an organic silicic compound having a functional group capable of bringing about an addition reaction with at least one of NH group and COOH group of the poly(amic acid), and water, followed by thermal curing, is excellent in heat resistance, small in changes in thermal expansion coefficient and modulus of elasticity at high temperatures, and hardly generating cracks and peeling.
Claims9
A heat resistant resin composition comprising a polyimide and an organic silicic compound of the formula (1) or (2):
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- wherein R is an organic group which forms a covalent bond with the polyimide;
- and R1, R2, R3, R4, R5 and R6 are independently a silicon-containing group having 0 to 3 groups of (SiRO{fraction (3/2)}) as repeating units, provided that when (SiRO{fraction (3/2)}) is zero, R1, R2, R3, R4, R5 and R6 are independently H, CH3 or C2H5.
A poly(amic acid) varnish composition comprising a poly(amic acid) and an organic silicic compound of the formula (1) or (2):
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- wherein R is an organic group having a functional group which brings about an addition reaction with at least one of NH group and COOH group in the poly(amic acid);
- and R1, R2, R3, R4, R5 and R6 are independently a silicon-containing group having 0 to 3 groups of (SiRO{fraction (3/2)}) as repeating units, provided that when (SiRO{fraction (3/2)}) is zero, R1, R2, R3, R4, R5 and R6 are independently H, CH3 or C2H5.
A process for producing a heat resistant resin composition, which comprises
- heating a mixture comprising a poly(amic acid), an organic silicic compound having a functional group which brings about an addition reaction with at least one of NH group and COOH group, and water to conduct condensation, and
- curing the resulting condensate.
Dependencies are inferred from the claim text.