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Polyacetal resin composition and method for producing polyacetal resin composition

A technology of polyacetal resin and manufacturing method, applied in the field of polyacetal resin composition, capable of solving problems such as residual polymerization stability and difficulty in controlling polymerization

Pending Publication Date: 2021-11-19
POLYPLASTICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

[0092] Hereinafter, although an Example demonstrates this invention concretely, this invention is not limited to these.

[0093] The polyacetal resin (A) and polyacetal copolymer (B) used in Examples and Comparative Examples are as follows.

[0094]

[0095] The polyacetal resin was prepared as follows.

[0096] In a twin-screw paddle-type continuous polymerizer, 96.7% by mass of trioxane (TOX), 3.3% by mass of 1,3-dioxolane (DO) and 800 ppm of methylal were continuously supplied. The mixture was polymerized by adding 20 ppm of boron trifluoride as a catalyst.

[0097] 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 recovered by centrifugation and dried to obtain a polyacetal resin.

[0098]

[0099] The polyacetal copolymer (B) was prepared as follows.

[0100] In a closed autoclave with a jacket and a sti...

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Abstract

The purpose of the present invention is to provide a polyacetal resin composition having improved levels of mechanical properties. The polyacetal resin composition is obtained by mixing, with respect to 100 parts by mass of a polyacetal resin (A), 0.1-100 parts by mass of a polyacetal copolymer (B) in which at least a trioxane (a), a cyclic acetal compound (b) containing, within a ring, an oxyalkylene group having 2 or more carbon atoms, and an organopolysiloxane (c) are polymerized, wherein the organopolysiloxane (c) is a condensate of at least one silane compound selected from a compound represented by formula (1): R1nSi(OR2)4-n, and has an alkoxy group. In the formula (1), R1 represents a monovalent hydrocarbon group, and R2 represents an alkyl group having 4 or less carbon atoms. n is an integer of 0 to 3.

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, further improvements in rigidity improvement and formaldehyde generation suppression are required while maintaining the original excellent sliding properties, appearance, etc. of polyacetal resins. [0003] On the other hand, if only for the purpose of improving rigidity, polyacetal resin is genera...

Claims

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Application Information

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IPC IPC(8): C08G2/24C08L59/04
CPCC08L59/00C08G2/38C08L59/04C08G2/24
Inventor 喜来直裕增田荣次
Owner POLYPLASTICS CO LTD
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