Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1987-02-06
1989-01-10
Anderson, Harold D.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
4284735, 528125, 528128, 528186, 528187, 528188, 528228, 528353, C08G 7310
Patent
active
047974664
ABSTRACT:
This invention relates to a novel polyimide and describes method of its preparation, adhesives of the polyimide and the method for their application.
The polyimide has recurring units of the formula ##STR1## (where R is a tetra-valent radical selected from the group consisting of aliphatic radical having not less than two carbons, cyclo-aliphatic radical, monoaromatic radical, condensed polyaromatic radical, and non condensed polyaromatic radical wherein aromatic radicals are mutually connected with a bond or a crosslinking function).
The polyimide can be prepared by reacting 2,6-bis(3-aminophenoxy)pyridine with tetracarboxylic dianhydride in an organic solvent and imidizing resultant polyamic acid.
Various tetracarboxylic dianhydrides can be used and particularly prefered are pyromellitic dianhydride and 3,3',4,4'-benzophenonetetracarboxylic dianhydride.
REFERENCES:
patent: 3716549 (1973-02-01), Darsow et al.
patent: 4111906 (1978-09-01), Jones et al.
patent: 4203922 (1980-05-01), Jones et al.
patent: 4535101 (1985-08-01), Lee et al.
Kawashima Saburo
Ohta Masahiro
Oikawa Hideaki
Sonobe Yoshiho
Tamai Shoji
Anderson Harold D.
Mitsui Toatsu Chemicals Inc.
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