# US 10,246,574 B2 · Light reflective parts and reflective parts for automobile lamp

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- Number: US 10,246,574 B2
- Document ID: US10246574B2
- Status: Granted
- Kind: B2
- Application number: 15/723,673
- Filed: 2017-10-03
- Published: 2018-04-05
- Granted: 2019-04-02
- Earliest claimed: 2016-09-30
- Assignees: Asahi Kasei Kabushiki Kaisha
- Applicants: Asahi Kasei Kabushiki Kaisha
- Inventors: Toru Yamaguchi; Kazuhiko Hashimoto; Chihiro Orimo
- Web page: https://patentgrep.com/patent/US10246574B2

## CPC

- C08K 5/5313: Phosphinic compounds, e.g. R2=P(:O)OR'
- C08K 5/527: Cyclic esters
- F21V 7/26: the material comprising photoluminescent substances
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR

## Abstract

Provided is a molded article in which the formation of depressions in a vapor deposited aluminum surface of the molded article caused by long-term exposure to high-temperature conditions is suppressed such that the vapor deposited aluminum surface has excellent external appearance that has not conventionally been achieved. A light reflective part includes a polyphenylene ether resin composition containing a polyphenylene ether (A) and 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide or a derivative thereof (B). The (A) component has a content of from 95 mass % to 99.95 mass % and the (B) component has a content of from 0.05 mass % to 5 mass % relative to 100 mass %, in total, of the (A) component and the (B) component.

## Claims

### Claim 1

A light reflective part comprising a polyphenylene ether resin composition containing
a polyphenylene ether (A), and
9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide or a derivative thereof (B), wherein
the (A) component has a content of from 95 mass % to 99.95 mass % and the (B) component has a content of from 0.05 mass % to 5 mass % relative to 100 mass %, in total, of the (A) component and the (B) component, and wherein
the polyphenylene ether resin composition is free of a sulfur-containing antioxidant.

### Claim 2 (depends on 1)

The light reflective part of claim 1, wherein
the polyphenylene ether resin composition further contains from 0.05 mass % to 5 mass % of an antioxidant (C) relative to 100 mass % of the polyphenylene ether resin composition.

### Claim 3 (depends on 2)

The light reflective part of claim 2, wherein
the antioxidant (C) is a phosphite antioxidant having a structure in chemical formula (5)
in molecules thereof.

### Claim 4 (depends on 1)

The light reflective part of claim 1, wherein
the polyphenylene ether resin composition further contains from 5 mass % to 50 mass % of a styrene resin relative to 100 mass % of the polyphenylene ether resin composition.

### Claim 5 (depends on 1)

The light reflective part of claim 1, wherein
the polyphenylene ether resin composition further contains from 1 mass % to 15 mass % of an elastomer component relative to 100 mass % of the polyphenylene ether resin composition.

### Claim 6 (depends on 1)

A reflective part for an automobile lamp comprising the light reflective part of claim 1.

### Claim 7 (depends on 6)

A molded article for a reflector part of an automobile lamp, the molded article comprising the reflective part for an automobile lamp of claim 6.

### Claim 8 (depends on 6)

A molded article for an extension part of an automobile lamp, the molded article comprising the reflective part for an automobile lamp of claim 6.