摘要 |
Polyimide having repeating units of the following formula (I) and its polyamic acid precursor having repeating units of the following formula (II) are disclosed; <CHEM> (where Y is a radical selected from the group consisting of a bond, divalent hydrocarbon having 1 to 10 carbons, hexafluorinated isopropylidene, carbonyl, thio, sulfinyl, sulfonyl and oxide, and R is a tetra-valent radical selected from the group consisting of aliphatic radical having 2 and more 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). Typical examples of polyimide and polyamic acid include where Y is thio radical and R is <CHEM> Y is a bond and R is III or IV, and Y is isopropylidene radical and R is IV. The polymers can be prepared from corresponding diamine and tetracarboxylic acid dianhydride. Polyimide or polyamic acid of this invention is excellent for high-temperature adhesive. |
申请人 |
MITSUI TOATSU CHEMICALS, INC. |
发明人 |
OHTA, MASAHIRO;SANOBE, YOSHIHO;KAWASHIMA, SABURO;TAMAI, SHOJI;OIKAWA, HIDEAKI;YAMAGUCHI, AKIHIRO;OHKOSHI, KOUJI |