Method for producing oxymethylene copolymer resin composition, and oxymethylene copolymer resin composition

A technology of oxymethylene copolymer and methylene copolymer, which is applied in the field of oxymethylene copolymer resin composition, can solve problems such as viscosity reduction, and achieve the effect of reducing the amount of formaldehyde produced

Active Publication Date: 2022-04-26
MITSUBISHI GAS CHEM CO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The residue of the hemiacetal terminal of the oxymethylene copolymer in the oxymethylene copolymer resin composition may cause the generation of formaldehyde in the molded article or the decrease in viscosity due to the decomposition of the main chain by formic acid

Method used

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  • Method for producing oxymethylene copolymer resin composition, and oxymethylene copolymer resin composition
  • Method for producing oxymethylene copolymer resin composition, and oxymethylene copolymer resin composition

Examples

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Embodiment 1～18

[0085] In Example 1 of the present invention, melamine 4.0 (μmol / g-POM) and choline hydroxide (C) 0.4 ( μmol / g-POM), and triethylene glycol-bis[3-(3-tert-butyl-5-methyl-4-hydroxyphenyl)propionate] as an antioxidant (D) per 100 wt. 0.3 parts by weight of the oxymethylene copolymer (A) was added, and pre-mixed using an FM mixer (Henschel mixer) (manufactured by NIPPON COKE & ENGINEERING COMPANY, LIMITED). Then, using a co-rotating twin-screw extruder (inner diameter 30mm, L / D=25), the mixture was continuously extruded while degassing at a cylinder temperature of 240°C and a reduced pressure of 21.3kPa to obtain oxygen Pellets of methylene copolymer resin composition.

[0086] Regarding Examples 2 to 15, 17 and 18 of the present invention, according to the amounts recorded in Table 1, the addition amounts of melamine (B), choline hydroxide (C) and antioxidant (D) were changed, and the same as in Example 1 The method, condition, obtain the pellet of oxymethylene copolymer resin ...

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Abstract

The present invention provides a method for producing an oxymethylene copolymer resin composition, the method comprising: a step for producing an oxymethylene copolymer (A); a step for adding an amine-substituted triazine compound (B) in an amount of Mn micromoles per 1 g of the oxymethylene copolymer (A), choline hydroxide (C) in an amount of Mc micromoles per 1 g of the oxymethylene copolymer (A), and 0.05-1.1 parts by weight of an antioxidant (D) in an amount of 0.05-1.1 parts by weight per 100 parts by weight of the oxymethylene copolymer (A), and performing melt kneading; mn ([mu] mol / g-POM) and Mc ([mu] mol / g-POM) satisfy 6.5 < (Mn + Mc * 8) < 25, 0.5 < Mn < 7.0, and 0.0 < Mc.

Description

technical field [0001] The present invention relates to a method for producing an oxymethylene copolymer resin composition and an oxymethylene copolymer resin composition. Background technique [0002] Oxymethylene copolymer resin compositions are used as engineering plastics in various industrial fields such as automobiles, electrical and electronic components, etc., by utilizing their mechanical properties, friction-wear characteristics, chemical resistance, heat resistance, or electrical properties. is widely used in. [0003] Patent Document 1 discloses that a predetermined amount of a quaternary ammonium compound and 2,2'-methylenebis-(4-methyl-tert-butylphenol) etc. are melt-kneaded in an oxymethylene copolymer (polyacetal). Oxymethylene copolymer resin composition made of anti-oxidant, which suppresses the generation of formaldehyde, acetaldehyde and acrolein. Also disclosed is an oxymethylene copolymer resin composition in which a predetermined amount of choline hy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L59/00C08K5/3492C08K5/19C08K5/134
CPCC08K5/34922C08K5/19C08K5/1345C08L2201/08C08L59/00C08K5/134C08L59/04C08K5/17C08K5/13B29C48/022C08G2/30
Inventor 中岛美香须长大辅
Owner MITSUBISHI GAS CHEM CO INC
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