Resin composition for molding, and molded body
The purpose of the disclosure is to provide a resin composition for molding, said resin composition exhibiting good compatibility with polyolefins and containing an ultraviolet absorbing polymer that is able to be purified at a low cost, and said resin composition being capable of forming a molded body that exhibits good transparency. A resin composition for molding containing a thermoplastic resin and an ultraviolet absorbing polymer, wherein: the ultraviolet absorbing polymer has a monomer unit represented by general formula (1), a monomer unit represented by general formula (2) and a thiol-based chain transfer agent residue; and the thiol-based chain transfer agent that forms the thiol-based chain transfer agent residue has a thiol group and one or more moieties that are selected from the group consisting of a carboxyl group, a hydroxyl group and an ester bond.
1 . A resin composition for molding, comprising a thermoplastic resin and an ultraviolet absorbing polymer, wherein
the ultraviolet absorbing polymer is a polymer having a monomer unit represented by the following general formula (1), a monomer unit represented by the following general formula (2), and a thiol-based chain transfer agent residue, and
a thiol-based chain transfer agent forming the thiol-based chain transfer agent residue has a thiol group and one or more moieties selected from a group consisting of a carboxyl group, a hydroxyl group, and an ester bond;
wherein
in general formula (1), R 11 represents any one selected from a group consisting of a hydrogen atom and a methyl group, and U is a hydrocarbon group having a skeleton that absorbs ultraviolet rays and may contain a heteroatom, wherein the skeleton is selected from the group consisting of a benzotriazole skeleton, a triazine skeleton, and a benzophenone, and
in general formula (2), R 21 represents any one selected from a group consisting of a hydrogen atom and a methyl group, and Z represents any one selected from a group consisting of a chain hydrocarbon group having 10 or more carbon atoms and a cyclic hydrocarbon group.
2 . The resin composition for molding according to claim 1 , comprising 0.001 to 0.3 parts by mass of sulfur atoms derived from the thiol-based chain transfer agent with respect to 100 parts by mass of total monomer units of the ultraviolet absorbing polymer.
3 . The resin composition for molding according to claim 1 , comprising 30 to 85% by mass of the monomer unit represented by general formula (2) in 100% by mass of total monomer units of the ultraviolet absorbing polymer.
4 . The resin composition for molding according to claim 1 , wherein a weight average molecular weight of the ultraviolet absorbing polymer is 3,000 to 150,000.
5 . A molded body obtained by molding the resin composition for molding according to claim 1 .