Cycloaliphatic polyimide, a method for producing the same, and its use
AssigneeIndustrial Technology Research Institute
InventorsKung-Lung Cheng, Shu-Chen Lin, Wen-Ling Lui, Chih-Hsiang Lin, Wei-Ling Lin, Woan-Shiow Tzeng
Life of this patent
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Abstract
This invention provides cycloaliphatic polyimide having the following formula (I): 1 wherein 1 and n are integers from 4 to 7; m is an integer from 0 to 2; p is an integer from 1 to 8; polycyclic aliphatic compound R reprents C1-8 cycloalkyl, cycloalkenyl, cycloalkynyl, norbornenyl, decalinyl, adamantanyl, or cubanyl. That cycloaliphatic polyimide can be a through transparent film, their thermal stability is over 430° C. and dielectric constant is about 2.7.
Claims25
A cycloaliphatic polyimide represented by the following formula (I):
- 6
- wherein
- Cl, Cm and Cn can be alkyl or alkenyl;
- 1 and n are integers from 4 to 7;
- m is an integer from 0 to 2;
- p is an integer from 1 to 8;
- and
- x is an integer equal to or greater than 1.
A method for producing the cycloaliphatic polyimide, comprising the following steps:
- (a) polycondensating a polycyclic aliphatic dianhydride having the following formula (III) with a polycyclic aliphatic diamine to form a product having the following formula (IV);
- and
- (b) converting the product into a cycloaliphatic polyimide having the following formula (I) with a cyclic reaction.
- 9
- wherein
- Cl, Cm and Cn can be alkyl or alkenyl;
- l and n are integers from 4 to 7;
- m is an integer from 0 to 2;
- p is an integer from 1 to 8;
- and
- x is an integer equal to or greater than 1.
A method for producing the cycloaliphatic polyamic acid or cycloaliphatic polyamic ester, comprising:
- polycondensating a polycyclic aliphatic dianhydride having the following formula (III) with a polycyclic aliphatic diamine to form a product, cycloaliphatic polyamic acid or cycloaliphatic polyamic ester, having the following formula (IV),
- 10
- wherein
- Cl, Cm and Cn can be alkyl or alkenyl;
- l and n are integers from 4 to 7;
- m is an integer from 0 to 2;
- p is an integer from 1 to 8;
- and
- x is an integer equal to or greater than 1.
Dependencies are inferred from the claim text.