Abstract: A method for domain-dividing a liquid crystal alignment film, which comprises (1) applying a radiation-sensitive resin composition onto a liquid crystal alignment film aligned in one direction and formed on a substrate, (2) exposing the radiation-sensitive resin composition through a predetermined pattern, (3) carrying out a development with an aqueous solution containing 0.01 to 1.5% by weight of an alkaline compound to partially protect the liquid crystal alignment film, (4) aligning an exposed portion of the liquid crystal alignment film in another direction and (5) removing the radiation-sensitive resin composition; and a liquid crystal device having a liquid crystal display device with the domain-divided liquid crystal alignment film.

Abstract: A radiation-sensitive resin composition comprising:(a) an epoxy group-containing alkali-soluble resin, or a combination of an alkali-soluble resin which may have an epoxy group and an epoxy compound,(b) 1,2-naphthoquinonediazide sulfonic acid ester, and(c) a solvent.The above radiation-sensitive resin composition is useful as a material for forming a lens.

Abstract: In the process for preparing polyether glycol comprising (A) polymerizing tetrahydrofuran or a mixture of tetrahydrofuran and other copolymerizable cyclic ether(s) in the presence of a ring-opening polymerization catalyst comprising fuming sulfuric acid and/or fluorosulfuric acid as principal component, (B) adding water or an aqueous alkali solution to the polymerization product, and heating said reaction product under the strongly acidic condition to hydrolyze the same and (C) washing the hydrolysis product comprising polytetramethylene glycol and polyether glycol having oxytetramethylene groups as principal constituent, the polymerization of the tetrahydrofuran or the mixture of tetrahydrofuran and other copolymerizable cyclic ether(s) in the (A) step is carried out by (1) contacting the same with a ring-opening polymerization catalyst at a temperature within the range of -30.degree. C. to 10.degree. C.