Patent ID: 11965058
Assignee: MITSUBISHI GAS CHEMICAL COMPANY, INC.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. A method for manufacturing an oxymethylene copolymer, comprising:
polymerizing a polymerization raw material containing trioxane and a comonomer in the presence of 1.0×10−8 moles or more and 1.0×10−6 moles or less of an acid catalyst per 1 mole of trioxane;
deactivating the acid catalyst by adding and mixing a hydroxylamine compound represented by General formula (1) below:, , where R1 and R2 each independently represent a hydrogen atom or a C1-C20 organic group, with the product obtained during the polymerizing of the polymerization raw material, wherein the hydroxylamine compound is in an amount of 50-5000 molar times the amount of the acid catalyst; and
further melt-kneading the mixture of the product and the hydroxylamine compound obtained during the adding and mixing of the hydroxylamine compound,
wherein the hydroxylamine compound is at least one selected from the group consisting of N,N-diethyl hydroxylamine; N,N-dibenzyl hydroxylamine; and N-isopropyl hydroxylamine.