Polyimide photosensitive cover coating agent
US5326792A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 23, 1992 |
| Grant date | Jul 5, 1994 |
| Priority date | — |
| Expiry date | Nov 23, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24917
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A photosensitive cover coating agent forming an insulating, protective coating having superior compatibility, sensitivity, heat resistance, adhesion, electrical properties and flexibility is provided, PA0 which coating agent is obtained by mixing a polymer (A) of repetition units of the formula ##STR1## wherein R.sup.1 is ##STR2## R.sup.2 is a divalent organic group, a compound (B) containing two or more (meth)acryloyl groups in one molecule, PA0 a compound (C) of the formula ##STR3## wherein Z is a divalent aliphatic or alicyclic group, R.sup.3 is H, monovalent organic group or characteristic group and R.sup.4 is H or --Z--R.sup.3, in 0.01 to 0.80 mol equivalent based on compound (B), the total quantity of (B) and (C) being 20 to 200 wt. parts per 100 wt. parts of (A), and PA0 a photopolymerization initiator or a sensitizing agent (D), in 0.5 to 20 wt. parts per 100 wt. parts of (A).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.