# US 10,246,586 B2 · Light-resistance improver

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- Number: US 10,246,586 B2
- Document ID: US10246586B2
- Status: Granted
- Kind: B2
- Application number: 14/779,226
- Filed: 2013-10-17
- Published: 2016-02-18
- Granted: 2019-04-02
- Earliest claimed: 2013-04-17
- Assignees: Daicel-Evonik Ltd.
- Applicants: Daicel-Evonik Ltd.
- Inventors: Tatsuki Akashi; Mitsuteru Mutsuda
- Web page: https://patentgrep.com/patent/US10246586B2

## CPC

- C08L 71/00: Compositions of polyethers obtained by reactions forming an ether link in the main chain (of polyacetals C08L59/00; of epoxy resins C08L63/00; of polythioether-ethers C08L81/02; of polyether-sulfones C08L81/06); Compositions of derivatives of such polymers
- C08L 27/18: Homopolymers or copolymers or tetrafluoroethene
- C08G 2650/40: containing ketone groups, e.g. polyarylethylketones, PEEK or PEK
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS

## Abstract

Provided is an additive that increases or improves a light resistance of anon-fluorinated thermoplastic resin (e.g., a super engineering plastic, such as an aromatic polyamide, a liquid crystal polyester, or an aromatic polyetherketone resin). The additive comprises a fluorine-containing resin. The fluorine-containing resin may be, for example, a fluorine-containing resin comprising a tetrafluoroethylene unit as a monomer unit, in particular, may be a tetrafluoroethylene copolymer (e.g., at least one member selected from the group consisting of a copolymer of tetrafluoroethylene and another fluorinated olefin, a copolymer of tetrafluoroethylene and a fluorinated vinyl ether, and a copolymer of tetrafluoroethylene, another fluorinated olefin and a fluorinated vinyl ether).

## Claims

### Claim 1

A method for improving the light resistance of a non-fluorinated thermoplastic resin, which comprises adding a light-resistance improver comprising a fluorine-containing resin to a non-fluorinated thermoplastic resin,
wherein the light-resistance improver forms a dispersed phase having an average particle diameter of 0.01 to 2 μm and an average interparticle distance of the dispersed phase is not more than 5 μm,
wherein the non-fluorinated thermoplastic resin comprises at least one member selected from the group consisting of an aromatic polyamide, a liquid crystal polyester, and an aromatic polyetherketone resin,
wherein the fluorine-containing resin comprises a tetrafluoroethylene copolymer and does not include a polytetrafluoroethylene, and
the ratio of the fluorine-containing resin relative to 100 parts by weight of the non-fluorinated thermoplastic resin is 10 to 20 parts by weight.

### Claim 2 (depends on 1)

The method according to claim 1, wherein the fluorine-containing resin comprises a thermoplastic fluorinated resin.

### Claim 3 (depends on 1)

The method according to claim 1, wherein the fluorine-containing resin comprises at least one member selected from the group consisting of:
a copolymer of tetrafluoroethylene and a fluorinated olefin other than tetrafluoroethylene,
a copolymer of tetrafluoroethylene and a fluorinated vinyl ether, and
a copolymer of tetrafluoroethylene, a fluorinated olefin other than tetrafluoroethylene, and a fluorinated vinyl ether.

### Claim 4 (depends on 1)

The method according to claim 1, wherein the fluorine-containing resin comprises at least one member selected from the group consisting of:
a copolymer of tetrafluoroethylene and a perfluoroolefin other than tetrafluoroethylene,
a copolymer of tetrafluoroethylene and a perfluoro(alkyl vinyl ether), and
a copolymer of tetrafluoroethylene, a perfluoroolefin other than tetrafluoroethylene, and a perfluoro(alkyl vinyl ether).

### Claim 5 (depends on 1)

The method according to claim 1, wherein the non-fluorinated thermoplastic resin comprises a polyetheretherketone.