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Polyacetal resin composition and preparation method thereof

A technology of polyacetal resin and composition, which is applied in dyeing organic silicon compound treatment, dyeing low-molecular organic compound treatment, dyeing physical treatment, etc., can solve the problems of increased cost and reduced product strength, and achieve improved compatibility, Reduced nuclei size, enhanced strength and toughness effects

Active Publication Date: 2013-12-18
YUNNAN YUNTIANHUA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In summary, the above inventions all increase the toughness of polyacetal by adding mineral fillers or elastomers, but all of them will lead to a decrease in product strength, and at the same time, the addition of elastomers will also increase the cost

Method used

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  • Polyacetal resin composition and preparation method thereof
  • Polyacetal resin composition and preparation method thereof
  • Polyacetal resin composition and preparation method thereof

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preparation example Construction

[0040] The present invention also provides a kind of preparation method of polyacetal composition, comprises the following steps:

[0041] Melt and mix 100 parts of polyacetal resin, 0.001-2.0 parts of antioxidant, 0.005-3.0 parts of formaldehyde absorbent, 0.002-2.0 parts of acid absorbent, 0.001-2.0 parts of processing stabilizer, and 0.1-20 parts of modified inorganic filler Refining, obtain polyoxymethylene composition;

[0042] The modified inorganic filler is obtained by modifying the inorganic filler and a modifier under the conditions of a rotating speed of 3000-50000 rpm and a temperature of 60-200°C.

[0043] According to the present invention, after mixing various raw materials, the polyacetal resin composition can be obtained through melt kneading. In the present invention, the pressure for melt kneading is preferably 10KPa, and the temperature is preferably 200-250°C. After kneading, it is preferably granulated and shaped to obtain a shaped product of the polyac...

Embodiment 1

[0052] 100 parts by weight of paraformaldehyde and 3.5 parts by weight of 1,3-dioxolane as comonomer in BF 3 -Polymerize in the presence of an ether catalyst, use methylal as a chain transfer agent, and then deactivate the catalyst with a triethylamine solution to obtain a polyoxymethylene copolymer. The melt index of its melt (measured at 190 ° C under 2.16 kg) is 2.0-30.0g / min.

Embodiment 2

[0054] The modification speed is 20,000 rpm, the modification temperature is 100°C, and the addition amount of isopropyl tris(dodecylbenzenesulfonyl) titanate is 2.0% of the weight of calcium carbonate to obtain modified calcium carbonate.

[0055] Add 0.4 parts by weight of tetrakis[methyl-β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester to 100 parts by weight of polyoxymethylene polymer prepared in Preparation Example 1, 0.2 The melamine of weight part, the calcium stearate of 0.1 weight part, 0.2 weight part of pentaerythritol stearate, the above-mentioned modified calcium carbonate of 5 weight parts, fully mix, then under 10KPa decompression condition, at 210 ℃, with The twin-screw extruder at the exhaust port was melted and mixed for 0.5 minutes, and then pelletized and formed. The pellets were dried at 140° C. for 3 hours to obtain a stabilized polyacetal composition.

[0056] figure 1 For the polarized picture of the polyacetal composition prepar...

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Abstract

The invention provides a polyacetal resin composition. The polyacetal resin composition comprises 100 parts of polyacetal resin, 0.001-2.0 parts of an antioxidant, 0.005-3.0 parts of a formaldehyde absorbent, 0.002-2.0 parts of an acid absorbent, 0.001-2.0 parts of a processing stabilizer and 0.1-20 parts of a modified inorganic filler, wherein the modified inorganic filler is obtained by using a modifying agent for modifying an inorganic filler at a rotating speed of 3000-50000r / pm at the temperature of 60-200 DEG C. The modified inorganic filler can be ensured for improving the compatibility of a composition matrix so as to realize uniform dispersion, and meanwhile plays a role in heterogeneous nucleation in the crystallization process of the composition so as to reduce the size of crystal nucleuses, thus the strength and the roughness of the obtained polyacetal resin composition are obviously improved. Experiment results show that the tensile strength of the polyacetal resin composition is 63-70MPa, and the notch impact strength of the polyacetal resin composition is 8.0-11.0KJ / m<2>.

Description

technical field [0001] The invention relates to the field of resin products, in particular to a polyacetal resin composition and a preparation method thereof. Background technique [0002] Polyacetal resin is a highly crystalline thermoplastic polymer with wear-resistant self-lubricating properties, oil resistance, chemical resistance, creep resistance and low water absorption. It can be used in a wide temperature range and has high Excellent mechanical, chemical properties and electrical performance retention, are widely used in industries such as automobiles, electronic appliances, household appliances, precision machinery and building materials. [0003] However, due to the poor toughness of polyacetal resin, especially the sensitivity to notch, the notched impact strength is low, which greatly limits its application. The Chinese patent with the publication number CN1176154C greatly improves the toughness of the polyacetal resin by adding nano-fillers and elastomers to t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L59/00C08K13/06C08K9/06C08K9/04C08K3/22C08K3/36C08K3/30C08K3/26C08K3/34C08K3/04C09C1/02C09C3/04C09C3/08C09C1/36C09C3/12
Inventor 刘海春李子林刘佩珍张红伟樊钹罗灵
Owner YUNNAN YUNTIANHUA
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