Mitsubishi Gas Chemical Company, Inc.

Thai Polyacetal Co., Ltd.

Yupin Pattamamongkolchai

Akira Ito

Daisuke Sunaga

Daisuke Kobayashi

Yumi Okui

Yuuta Yamamoto

Sanit Palaharn

Wandee Thuamthong

The present invention provides a polyacetal resin composition comprising (A) a polyacetal resin and (B) zinc oxide, wherein the content of oxyalkylene constituent units other than an oxymethylene group in the polyacetal resin (A) is 0.1% by mass or more, and wherein the total surface area of the zinc oxide (B) in the polyacetal resin composition is 0.1 to 40 mper 100 g of the polyacetal resin (A); as well as an article molded therefrom.

Polyacetal resin composition and article molded therefrom

The present invention is to provide a process for producing an oxymethylene copolymer, in which deteriorate due to oxidation hardly occurs, an amount of formaldehyde generated from the product when stored for a long time under environment of high temperature and high humidity is reduced, and occurrence of mold deposit during molding is small. A process for producing an oxymethylene copolymer includes Step 1 of polymerizing polymer raw materials containing trioxane and a comonomer in the presence of a specific amount of an acid catalyst, Step 2 of adding a hydroxylamine compound represented by the following general formula (1): to a product obtained in the Step 1 in an amount of 1 to 20-fold mol based on an amount of the acid catalyst and mixing these, andStep 3 of further melting and kneading a mixture of the product and the hydroxylamine compound obtained in the Step 2.

Process for producing oxymethylene copolymer

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Rayong, Thailand

Yupin Pattamamongkolchai