Resin composition for molding, and molded body

Patent metadata

Field	Value
Publication number	US-12545781-B2
Application number	US-202218089550-A
Country	US
Kind code	B2
Filing date	Dec 27, 2022
Priority date	Jul 9, 2020
Publication date	Feb 10, 2026
Grant date	Feb 10, 2026

Abstract

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.

First claim

What is claimed is:

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 .

Assignees

• Artience Co Ltd
• Toyocolor Co Ltd
• Artiece Co Ltd

Inventors

• Aotani Tomoyuki
• Takahashi Kohei
• Murata Chihiro
• Hu Hao
• Nishinaka Takeshi

Classifications

• C08F220/12

  of monohydric alcohols or phenols · CPC title

• C08L101/00

  Compositions of unspecified macromolecular compounds · CPC title

• C08L33/04

  Homopolymers or copolymers of esters {(C08L43/04 takes precedence)} · CPC title

• C08L33/14 Primary

  of esters containing halogen, nitrogen, sulfur, or oxygen atoms in addition to the carboxy oxygen · CPC title