Organic polymer and preparation and use thereof
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsAkio Takimoto, Hirofumi Wakemoto, Eiichiro Tanaka, Masanori Watanabe, Junko Asayama, Hisahito Ogawa, Shigehiro Sato, Fumiko Yokotani
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Abstract
An alternating copolymer comprising a repeating unit of the formula: --Z--(X-Y).sub.n -- (I) wherein n is at least 2, X is O, S, Se or Te, and Y and Z are independently an aromatic or substituted aromatic group, and at least one other repeating unit, which is useful as a photosensitive material used in a spatial light modulator.
Claims7
A process for preparing a polyimide comprising reacting a diamine of the formula:
- NH.sub.2 --(Y.sub.i -X.sub.i).sub.n --Y.sub.i --NH.sub.2 (III)
- wherein n is a number of at least 2, i is a positive integer not larger than n, Y is an aromatic or substituted aromatic group, and X is O, S, Se, Te or the divalent group --CH.dbd.CH--, and a tetracarboxylic dianhydride of the formula:
- ##STR7## wherein A is a tetravalent hydrocarbon group in a molar ratio of said diamine to said dianhydride of 1:(1+m) wherein m is a positive number to obtain a polyamic acid, wherein said diamine and said tetracarboxylic dianhydride are reacted in a ratio of said diamine to said dianhydride of 1:(1+m), wherein m is larger than zero and smaller than 1, to form said polyamic acid, and then an additional amount of said carboxylic anhydride is added to said polyamic acid;
- polymerizing said polyamic acid;
- and annealing the resultant polymerization product at a temperature of 200.degree. to 400.degree. C. to obtain polyimide.
A process for preparing an organic polymer comprising evaporating a raw material comprising a diamine of the formula:
- NH.sub.2 --(Y.sub.i -X.sub.i).sub.n --Y.sub.i --NH.sub.2 (III)
- wherein n is a number of at least 2, i is a positive integer not larger than n, Y is an aromatic or substituted aromatic group, and X is O, S, Se, Te or the divalent group --CH.dbd.CH--, and a tetracarboxylic dianhydride of the formula:
- ##STR8## wherein A is a tetravalent hydrocarbon group, and wherein said diamine and said dianhydride are independently evaporated in an evaporation ratio of said diamine to said dianhydride of 1:(1+m), wherein m is a positive number;
- and polymerizing them on a substrate, wherein the temperature of said substrate is higher than a melting point of said diamine.
Dependencies are inferred from the claim text.