[미국특허]
Polyimide material and method of manufacture
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C08G-073/10
B32B-027/00
B32B-015/00
출원번호
US-0204434
(1998-12-03)
발명자
/ 주소
Kifer Edward W.
Kwiecinski James R.
출원인 / 주소
Ranbar Electrical Materials, Inc.
대리인 / 주소
Kirkpatrick & Lockhart LLP
인용정보
피인용 횟수 :
1인용 특허 :
10
초록▼
A fully imidized cresylic acid soluble polymer comprising 4,4'- oxydiphthalic anhydride (ODPA), 3,4,3',4',-biphenyltetracarboxylic dianhydride (BPDA), 3,4'-oxydianiline (ODA), and 4,4'-oxydianiline (DAPE) that can be used as a coating material such as a wire coated enamel. The polyimide has relative
A fully imidized cresylic acid soluble polymer comprising 4,4'- oxydiphthalic anhydride (ODPA), 3,4,3',4',-biphenyltetracarboxylic dianhydride (BPDA), 3,4'-oxydianiline (ODA), and 4,4'-oxydianiline (DAPE) that can be used as a coating material such as a wire coated enamel. The polyimide has relatively low viscosity and high percent solids by substituting some of the 3,4'oxydianiline with 4,4'oxydianiline. Substitution with the 4,4'oxydianiline can be accomplished up to 25% on the molar basis without losing the fully imidized, cresol solubility characteristics.
대표청구항▼
[ What is claimed is:] [1.] A method of preparing a polyimide material comprising:providing 4,4'-oxydiphthalic anhydride and 3,4,3',4'-biphenyltetracarboxylic dianhydride at a molar ratio ranging from about 25 mole percent to about 75 mole percent 4,4'-oxydiphthalic anhydride to 3,4,3',4'-biphenylte
[ What is claimed is:] [1.] A method of preparing a polyimide material comprising:providing 4,4'-oxydiphthalic anhydride and 3,4,3',4'-biphenyltetracarboxylic dianhydride at a molar ratio ranging from about 25 mole percent to about 75 mole percent 4,4'-oxydiphthalic anhydride to 3,4,3',4'-biphenyltetracarboxylic dianhydride to about 75 mole percent to about 25 mole percent 4,4'-oxydiphthalic anhydride to 3,4,3',4'-biphenyltetracarboxylic dianhydride;adding 3,4'-oxydianiline to the 4,4'-oxydiphthalic anhydride and 3,4,3',4'-biphenyltetracarboxylic dianhydride to form a mixture;adding a solvent to the mixture to form a solution having a percentage of solids effective in maintaining polymer stability, wherein the solvent is selected from the group consisting of a polar aprotic and a polar protic solvent;adding 4,4'-oxydianiline to the solution to form a modified solution, the 4,4'-oxydianiline added at a molar ratio ranging from about 2 to about 98 mole percent 4,4'-oxydianiline to 3,4'-oxydianiline to about 25 to about 75 mole percent 4,4'-oxydianiline to 3,4'-oxydianiline;agitating the modified solution; andadding an azeotropic solvent to the modified solution and supplying heat effective in removing water to form the polyimide.
Lupinski John H. (Scotia NY) McQuade James M. (Fort Wayne IN), Method for making polyimide coated conductors in a continuous manner and products made thereby.
Hellbaum Richard F. (Hampton VA) Bryant Robert G. (Poquoson VA) Fox Robert L. (Hayes VA), Thin layer composite unimorph ferroelectric driver and sensor.
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