POLYIMIDE AND HIGH-TEMPERATURE ADHESIVE OF POLYIMIDE

    公开(公告)号:GB2199586B

    公开(公告)日:1990-05-23

    申请号:GB8700164

    申请日:1987-01-06

    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(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--amino-phenoxy)pyridine with tetracarboxylic dianhydride in an organic solvent and imidizing resultant polyamic acid.Various tetracarboxylic dianhydrides can be used and particularly preferred are pyromellitic dianhydride and 3,3',4,4'--benzophenonetetracarboxylic dianhydride.

    Polyimide and high-temperature adhesive thereof

    公开(公告)号:GB2199586A

    公开(公告)日:1988-07-13

    申请号:GB8700164

    申请日:1987-01-06

    Abstract: The polyimide has recurring units of the formula (where X is carbonyl radical or sulfonyl radical, and R is a tetra-valent radical selected from 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 diamine with tetracarboxylic dianhydride in organic solvents and imidizing resultant polyamic acid. The diamine in use is ether diamine and includes 4,4'-bis [4-(4-amino- alpha ??? alpha -dimethylbenzyl) phenoxy] benzophenone and 4,4'-bis [4-(4-amino- alpha ??? alpha -dimethylbenzyl) phenoxy] diphenylsulfone. Various tetracarboxylic dianhydrides can be used and particularly preferred are pyromellitic dianhydride and 3,3 min , 4,4 min - benzophenonetetracarboxylic dianhydride. Uses:- Adhesives.b

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