Patent ID: 8415425

Claim:
A method for protecting the surface of a member to be processed, which comprises providing a protective film made of a photocurable resin composition for surface protection on the surface of the member to be processed, processing the member to be processed, and removing the protective film from the member to be processed, wherein the photocurable resin composition comprises (A) a polyfunctional (meth)acrylate, (B) a monofunctional (meth)acrylate, (C) a resin having a cyclopentadiene skeleton and (D) a photopolymerization initiator, which comprises from 1 to 50 parts by weight of (A), from 5 to 95 by mass of (B) and from 0.1 to 50 parts by mass of (C), wherein (A) comprises a polyfunctional (meth)acrylate having 1,2-polybutadiene-terminated urethane (meth)acrylate and dicyclopentanyl di(meth)acrylate, (C) has a softening point of from 50° C. to 200° C. and a number average molecular weight (Mn) of from 300 to 600, and (D) comprises at least one member selected from the group consisting of benzophenone, benzyl, anthraquinone, benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin propyl ether, benzoin isobutyl ether, benzyl dimethyl ketal, diethoxyacetophenone, 4-t-butyltrichloroacetophenone, 2-dimethylaminoethyl benzoate, p-dimethylaminoethyl benzoate, diphenyl disulfide, camphor quinine, 7,7-dimethyl-2,3-dioxobicyclo[2.2.1]heptane-1-carboxylic acid, 7,7-dimethyl-2,3-dioxobicyclo[2.2.1]heptane-1-carboxy-2-bromoethylester, 7,7-dimethyl-2,3-dioxobicyclo[2.2.1]heptane-1-carboxy-2-methyl ester, 7,7-dimethyl-2,3-dioxobicyclo[2.2.1]heptane-1-carboxylic acid chloride, 2-methyl-1-[4-(methylthio)phenyl]-2-morpholino propan-1-one, 2-benzyl-2-dimethylamino-1-(4-morpholino phenyl)-butanone-1, benzoyl diphenyl phosphine oxide, 2,4,6-trimethyl benzoyl diphenyl phosphine oxide, benzoyl diethoxyphosphine oxide, 2,4,6-trimethyl benzoyl dimethoxyphenyl phosphine oxide and 2,4,6-trimethyl benzoyl diethoxyphenyl phosphine oxide.