Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1987-11-10
1990-03-13
Kight, John
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
528125, 528126, 528172, 528176, 528187, 528353, C08G 6926
Patent
active
049084097
ABSTRACT:
Polyimide of this invention is almost colorless and has remarkably high light transmittance as well as excellent processability and adhesive properties at high temperatures in addition to its substantial high-temperature stability.
The polyimide is a novel polyimide capable of being used for space and aeronautical materials, electric and electronic members, automotive parts, and furthermore for high-temperature adhesives.
The polyimide has recurring units of the following formula ##STR1## wherein X is a radical selected from the group consisting of a bond, divalent hydrocarbon radical having from 1 to 10 carbons, hexafluorinated isopropylidene radical, carbonyl radical, sulfonyl radical and thio radical, and each nitrogen atom of imide ring is located simultaneously at meta- or para-position to ether linkage.
The polyimide of this invention is prepared by reacting 4,4'-(p-phenylenedioxy)diphthalic dianhydride with an ether diamine having the following general formula (V): ##STR2## and successively imidizing the resultant polyamic acid. Examples of the ether diamine used for preparing the polyamide include,
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patent: 4443591 (1984-04-01), Schmidt et al.
patent: 4526838 (1985-07-01), Fujioka et al.
patent: 4696994 (1987-09-01), Nakajima et al.
Modern Plastics International, Jun. 1982, pp. 38 to 39.
Kogyo Zairyo, 27, 98, (1979).
Kawashima Saburo
Koga Nobuhito
Liyama Katsuaki
Ohta Masahiro
Oikawa Hideaki
Kight John
Mitsui Toatsu Chemicals Inc.
Moore M. L.
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