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Polyacetal resin composition and method for producing polyacetal resin composition

A technology of polyacetal resin and polyacetal copolymer, which is applied in the field of polyacetal resin composition, and can solve the problems of residual polymerization stability and difficulty in controlling polymerization, etc.

Active Publication Date: 2021-05-04
POLYPLASTICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when a compound having a plurality of epoxy groups represented by glycidyl ether groups and ether oxygen is used as a functional group in polymerization, there remains a problem in terms of polymerization stability.
In particular, when a protic acid is used as a polymerization catalyst, polymerization does not occur at a low catalyst amount, but when the catalyst amount is increased, a sudden violent polymerization reaction occurs after an irregular induction period, and it is difficult to control the polymerization

Method used

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  • Polyacetal resin composition and method for producing polyacetal resin composition
  • Polyacetal resin composition and method for producing polyacetal resin composition
  • Polyacetal resin composition and method for producing polyacetal resin composition

Examples

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Embodiment

[0088] Hereinafter, although an Example demonstrates this invention concretely, this invention is not limited to these Examples.

[0089] The polyacetal resin (A) and polyacetal copolymer (B) used in Examples and Comparative Examples are as follows.

[0090]

[0091] The polyacetal resin (A) was prepared as follows.

[0092] A mixture of 96.7% by mass of trioxane (TOX), 3.3% by mass of 1,3-dioxolane (DO) and 800 ppm of methylal was continuously supplied to a twin-shaft paddle-type continuous polymerizer, As a catalyst, 20 ppm (calculated as boron trifluoride) of boron trifluoride dibutyl ether complex (dibutyl ether solution) was added to carry out polymerization.

[0093] The polymer discharged from the outlet of the polymerizer was immediately added to an aqueous solution containing 1000 ppm of triethylamine, pulverized and stirred to deactivate the catalyst. Next, the polymer is collected and dried by centrifugation to obtain a polyacetal resin (A).

[0094]

[0095]...

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Abstract

The purpose of the present invention is to provide a polyacetal resin composition having an improved level of mechanical properties. The purpose of the present invention is achieved by a polyacetal resin composition that can be obtained by mixing 0.1-100 parts by mass of a polyacetal copolymer (B) which can be obtained by copolymerizing at least trioxane (a) and a siloxane compound (b) represented by formula (1) with respect to 100 parts by mass of a polyacetal resin (A). In formula (1), R1 represents a monovalent aliphatic hydrocarbon group having 1-6 carbon atoms or an aromatic hydrocarbon group having 6-10 carbon atoms, and X represents an organic group having R1 or an epoxy group. However, two or more of a plurality of X's are an organic group having an epoxy group, and a plurality of R1's and a plurality of X's may be respectively the same or different.

Description

technical field [0001] The present invention relates to a polyacetal resin composition excellent in mechanical properties and a method for producing the polyacetal resin composition. Background technique [0002] Polyacetal resins have excellent properties in terms of mechanical properties, thermal properties, electrical properties, slidability, and moldability, and are widely used mainly as structural materials, mechanical parts, etc. in electrical equipment, automotive parts, and precision machine parts. However, as the fields of application of polyacetal resins expand, the required properties tend to be more sophisticated, complex, and specialized. As such required properties, it is required to further improve rigidity improvement and formaldehyde generation suppression while maintaining the original excellent sliding properties, appearance and the like of polyacetal resins. [0003] On the other hand, if only for the purpose of improving rigidity, polyacetal resin is ge...

Claims

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Application Information

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IPC IPC(8): C08G2/22C08L59/02C08L59/04
CPCC08L59/02C08L59/04C08G2/22
Inventor 喜来直裕增田荣次
Owner POLYPLASTICS CO LTD
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