The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 05, 1995
Filed:
Jun. 28, 1994
Kouichi Kunimune, Chibaken, JP;
Toshiharu Aono, Yokohamashi, JP;
Chisso Corporation, Osaka, JP;
Abstract
A polyimidesiloxane film having a low heat conductivity without damaging the heat resistance intrinsic of polyimide, a high hardness and a superior adherence onto its substrate, is provided, which polyimidesiloxane film comprises a cross linked copolymer having repetition units expressed by the formula (1): ##STR1## wherein R.sup.1 independently is a tetravalent organic group, R.sup.2 independently is a divalent organic group of 2 to 30 C, R.sup.3 independently is represented by 4 specified formulas, R.sup.4 and R.sup.5 each are a specified organic group, and n, p, q, and r each have a value within a range satisfying 3 specified equations, and which film exhibited a heat resistance of 511.degree. C. or higher, a hardness of 3H or higher and a heat conductivity of 0.160 or lower.