Thermally fusible adhesive copolymer, articles made therefrom, and method for producing the same
US5932345A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 10, 1996 |
| Grant date | Aug 3, 1999 |
| Priority date | — |
| Expiry date | Sep 10, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31721
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A novel heat-fusible copolymer possessing a combination of excellent properties, including mechanical strength, resistivity against radioactive rays, chemical resistance, low temperature stability, thermal resistance, processabilty, adhesiveness, thermal fusible adhesive stability, and simultaneously satisfying requirements relating to low hygroscopic characteristic and stable dielectric constant. Also, a powder, film, laminated film, laminated insulating material, and article, such as electronic modules and capacitors, made from a thermoplastic polyimide resin composed mainly of the copolymer and suitable for use as electronic components and materials for electronic circuit components. The copolymer possesses a glass transition temperature of 100.degree. C. to 250.degree. C., a hygroscopic degree of 1 or less, and a dielectric rate of 3 or less, and has the following formula: ##STR1## wherein Ar.sub.1 represents a quadrivalent organic radical, Ar.sub.2 represents a divalent organic radial, R represents a divalent organic radical, X represents trivalent bonding radicals, m and n are each integers of 0 or more, the sum of m and n being an integer of 1 or more, and 1 is an integer of…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.