Patent ID: 9388264
Filing Date: 2016-07-12
CPC Classification: C08F

Claim Text:
1. A method for producing a resin composition, comprising the steps of: subjecting a radical copolymerization of a first radical polymerizable monomer which is free from any crystalline molecular chain, and a second radical polymerizable monomer having a crystalline molecular chain, in the presence of a radical polymerization initiator, wherein the second radical polymerizable monomer is the following compound 1, (wherein R 1 denotes a hydrogen atom or a methyl group, and R 2 denotes an alkyl group having at least 17 carbon atoms), and the first radical polymerizable monomer and the second radical polymerizable monomer are a combination of monomers such that a precipitate, which is obtained by a method shown below, has a sea-island type phase separation structure, preparing a first homopolymer by polymerizing the first radical polymerizable monomer, preparing a second homopolymer by polymerizing the second radical polymerizable monomer, dissolving the first homopolymer and the second homopolymer in a solvent and obtaining a solution of the homopolymers, and adding the solution of the homopolymers to a common poor solvent and obtaining the precipitate, wherein the first radical polymerizable monomer has the following monomer reactivity ratio r r 1 >1.0 r 2 <1.0 (wherein r 1 =k 11 /k 12 , wherein k k r 2 =k 22 /k 21 , wherein k k the ratio (B/(A+B)) of the second radical polymerizable monomer to the first radical polymerizable monomer is 0.25 or more and 0.80 or less in the copolymerization, wherein A denotes the amount of first radical polymerizable monomer (parts by mass), and B denotes the amount of second radical polymerizable monomer (parts by mass), the resin composition comprises a first unit which is free from any crystalline molecular chain and a second unit having a crystalline molecular chain, wherein the ratio (D/(C+D)) of the second unit to the first unit is 0.25 or more and 0.80 or less in the resin composition, wherein C denotes the amount of first unit (parts by mass), and D denotes the amount of second unit (parts by mass), and the resin composition has a sea-island type phase separation structure in which a main unit of a resin component forming the island phase is the first unit, and a main unit of a resin component forming the sea phase is the second unit.