US 12,305,034 B2
Automobile interior component made from polyacetal resin
Hatsuhiko Harashina, Shizuoka (JP); Tomohiro Monma, Shizuoka (JP); and Akihiro Tamaoka, Shizuoka (JP)
Assigned to Polyplastics Co., Ltd., Tokyo (JP)
Appl. No. 17/637,624
Filed by Polyplastics Co., Ltd., Tokyo (JP)
PCT Filed Jun. 9, 2020, PCT No. PCT/JP2020/022628
§ 371(c)(1), (2) Date Feb. 23, 2022,
PCT Pub. No. WO2021/059608, PCT Pub. Date Apr. 1, 2021.
Claims priority of application No. 2019-176950 (JP), filed on Sep. 27, 2019.
Prior Publication US 2022/0275196 A1, Sep. 1, 2022
Int. Cl. C08L 59/00 (2006.01)
CPC C08L 59/00 (2013.01) [C08L 2666/34 (2013.01); C08L 2666/36 (2013.01); C08L 2666/78 (2013.01)] 1 Claim
 
1. An automobile interior component, wherein the automobile interior component is obtained using a polyacetal resin composition comprising, at least:
100 parts by mass of a polyacetal polymer (A) obtained by copolymerizing 96.7% by mass of trioxane and 3.3% by mass of 1,3-dioxolane;
0.03 to 0.30 parts by mass of a hindered phenol antioxidant (B) selected from the group consisting of ethylenebis(oxyethylene) bis[3-(5-t-butyl-4-hydroxy-m-tolyl)propionate] and pentaerythritol tetrakis[3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate];
0.05 to 0.35 parts by mass of an aliphatic carboxylic acid hydrazide (C) selected from the group consisting of sebacic acid dihydrazide, adipic acid dihydrazide and dodecanedioic acid dihydrazide;
0.005 to 0.45 parts by mass of a hydantoin compound 1,3-bis(hydrazinocarbonoethyl)-5-isopropylhydantoin (D); and
0.005 to 0.20 parts by mass of an alkaline earth metal salt of an aliphatic carboxylic acid (E) selected from the group consisting of calcium stearate and calcium 12-hydroxystearate, wherein
a total amount of the components (C) and (D) is 0.055 to 0.55 to parts by mass with respect to 100 parts by mass of the polyacetal polymer (A).