Abstract:
The invention relates to a curable resin composition for coating optical fibers comprising: (1) 50-70 wt.% of a urethane (meth)acrylate obtained by reacting (A) a polyol compound, (B) a polyisocyanate compound, and (C) a (meth)acrylate compound containing a hydroxyl group; (2) a reactive diluent copolymerizable with the component (1); and (3) a polymerization initiator; wherein the rate of dimensional change of the cured product of the composition after immersion in mineral oil at 25 DEG C for one week is 2.5 % or less, or when forming a product with a three-layer structure, specifically, secondary layer-primary layer-secondary layer, or a five-layer structure, specifically, coloring layer-secondary layer-primary layer-secondary layer-coloring layer, using the cured product of the composition as the primary layer, the primary layer exhibits no foam defects after immersing the product in hot water at 60 DEG C for one week.
Abstract:
There are provided a polyamic acid obtainable by reacting a diamine compound of the formula (1) wherein R is an alkyl group having 1 to 12 carbon atoms, a haloalkyl group having 1 to 12 carbon atoms or a halogen atom, each of X and Y is independently a divalent linking group, with a tetracarboxylic acid dianhydride; a polyimide obtainable by dehydrating and ring-closing the above polyamic acid; and a liquid crystal aligning agent containing the above polyamic acid and/or the above polyimide.
Abstract:
There are provided a polyamic acid obtainable by reacting a diamine compound of the formula (1) wherein R is an alkyl group having 1 to 12 carbon atoms, a haloalkyl group having 1 to 12 carbon atoms or a halogen atom, each of X and Y is independently a divalent linking group, with a tetracarboxylic acid dianhydride; a polyimide obtainable by dehydrating and ring-closing the above polyamic acid; and a liquid crystal aligning agent containing the above polyamic acid and/or the above polyimide.
Abstract:
PROBLEM TO BE SOLVED: To provide: a conductor material of a light weight and a low cost; a compound suitably usable for production of such a conductive material; and a method for producing the same.SOLUTION: A thiophene compound is represented by formula (1). A thiophene polymer is obtained by polymerization of the thiophene compound. In the formula, Rare each independently a hydrogen atom or a 1-20C monovalent organic group; and n is an integer of 1 to 5.
Abstract:
PROBLEM TO BE SOLVED: To provide a radiation curable resin composition having excellent adhesiveness to PET, TAC, Arton(R), etc., workability, heat resistance and water resistance and having rapid curing property. SOLUTION: The invention relates to the radiation curable resin composition comprising following component (A) and (B). Wherein (A) is 30-70 wt.%. of a urethane (meth)acrylate having 10,000-40,000 of number average molecular weight and (B) is 0.1-70 wt.%. of an ethylenic unsaturated monomer having a cyclic ether. COPYRIGHT: (C)2005,JPO&NCIPI