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Poly formol resin composition and its formed body

A technology of polyoxymethylene resin and composition, which is applied in the field of polyoxymethylene resin composition, and can solve the problems of reduced impact resistance and the like

Inactive Publication Date: 2002-08-21
ASAHI KASEI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because polyacetal is not acid-resistant, when kneading under high temperature and high shear, the decomposition of polyacetal resin sometimes occurs. Compared with the above-mentioned polyoxymethylene resin mixed with polyurethane resin composition, the resistance of the obtained composition The impact is greatly reduced

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0126] 95 parts by weight of polyoxymethylene resin (a-1) (containing stabilizer triethylene glycol-bis-[3-(3-tert-butyl-5-methyl-4-hydroxyphenyl) propionate] 0.3 weight %, polyamide 66 0.05% by weight, calcium stearate 0.10% by weight), 2.5 parts by weight of polyamide elastomer (b-1) and 2.5 parts by weight of acid-modified olefin resin (c-3). After blending, use a twin-screw extruder with a diameter of 30 mm and a temperature of 200° C. and an aspect ratio (L / D) of 30 to carry out melt kneading under the conditions of screw revolutions of 200 rpm and 10 kg / hr. The extruded resin was cut into pellets with a strand cutter. The pellets were used for evaluation of the above-mentioned properties. The results are shown in Table 1. [Embodiments 2-7]

Embodiment 2～7

[0127] Except having made the composition of the resin composition into the composition shown in Table 1, the pellet of the resin composition was produced by the method similar to Example 1, and the evaluation about each performance mentioned above was performed. The results are shown in Table 1.

[0128] Example

[0129] Get 100 parts by weight of (a-1), except that (b-1) and (c-3) are not added, other pellets of the resin composition are manufactured in the same manner as in Example 1, and the evaluation of the above-mentioned properties is carried out . The results are shown in Table 2. [Comparative examples 2 to 5]

Embodiment 9～16

[0139] Example

[0140] Except having made the composition of the resin composition into the composition shown in Table 5, the pellet of the resin composition was produced by the method similar to Example 4, and it evaluated about each performance mentioned above. The results are shown in Table 5. [Comparative Examples 15, 16]

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PUM

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Abstract

Polyoxymethylene resin composition comprising 40 to 99.5 parts by weight of polyoxymethylene resin (A), and 0.5 to 60 parts by weight of resin consisting of a polyamide elastomer (B) and an acid-modified olefinic resin (C) having an acid modification rate of 0.05 to 15 wt. %, a ratio of (B) / (c) being in a range of 10 / 90 to 90 / 10 % by weight, has a much distinguished impact resistance and a good antistatic property, while maintaining the heat stability inherent to the polyoxymethylene resin, and is suitable for use in OA appliances, VTR appliances, music-image-information appliances, communication appliances, automobile interior and exterior furnishings and industrial sundries.

Description

technical field [0001] The present invention relates to a polyoxymethylene resin composition. The molded article composed of the polyoxymethylene resin composition of the present invention is suitably used as parts in precision machinery, home appliances and office automation equipment, automobiles, industrial materials and miscellaneous goods, and the like. Background of the invention [0002] As an engineering resin with comprehensive mechanical properties and excellent wear resistance, polyoxymethylene resin is widely used in various mechanical parts and office equipment. However, the impact resistance of polyoxymethylene resin is not good enough. For this reason, it is explored to add elastomer components to polyoxymethylene resin to form a blended resin composition. For example, U.S. Patent No. US-A-4804716 and No. 4978725 disclose the technology of blending polyurethane resin in polyoxymethylene resin, and U.S. Patent No. US-A-4277577 discloses blending olefin-based ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L59/00C08L59/02
CPCC08L59/02C08L59/00C08L23/00C08L77/00
Inventor 工藤修一堀尾光宏
Owner ASAHI KASEI KK