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Polyformaldehyde modified material and preparation method thereof

A modified material and polyoxymethylene technology, applied in the field of modified plastics, can solve the problems of unsatisfactory performance, high notch sensitivity, easy decomposition of formaldehyde, etc., and achieve the effects of low production cost, reduced production cost, and reduced decomposition.

Inactive Publication Date: 2013-02-13
KAILUAN GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although polyoxymethylene has excellent comprehensive physical and mechanical properties and is widely used as an ideal engineering plastic, but under many demanding conditions, some properties cannot meet the requirements of use.
Such as low impact toughness, high notch sensitivity, large friction coefficient, poor heat resistance, and easy decomposition of formaldehyde during processing.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: The polyoxymethylene modified material adopts the following raw materials and preparation methods.

[0022] (1) Weigh the following materials by weight: 100kg of polyoxymethylene, 0.1kg of xylene formaldehyde, 0.1kg of surface-modified nano-zinc oxide, 0.4kg of triphenyl phosphate (TPP), 0.2kg of hindered amine ultraviolet absorber, thermoplastic Polyurethane elastomer (TPU) 1.0kg;

[0023] The modification method of nano-zinc oxide is: disperse nano-zinc oxide in ethanol aqueous solution with a volume ratio of 5:1; under the protection of inert gas, add silane coupling agent, stir and react at 70°C for 2h; then filter, wash, After drying, the surface-modified nano zinc oxide is obtained.

[0024] (2) According to the above weight, melt and blend the toughening agent and the modified formaldehyde scavenger in the internal mixer to make them uniformly dispersed to form toughened masterbatch. The mixing temperature of the internal mixer is 160°C; Then mix ...

Embodiment 2

[0027] Embodiment 2: The polyoxymethylene modified material adopts the following raw materials and preparation methods.

[0028] (1) Weigh the following materials by weight: polyoxymethylene 100kg, diphenylamine 0.1kg, surface-modified nano-magnesium oxide 0.1kg, tris(2-chloroethyl)phosphate (TCEP) 0.4kg, hindered amine UV absorber Agent 0.2kg, thermoplastic polyurethane elastomer (TPU) 1.0kg;

[0029] The modification method of nano-magnesia is as follows: disperse nano-magnesia in ethanol aqueous solution with a volume ratio of 5:1; under the protection of inert gas, add a titanate coupling agent, stir and react at 60°C for 2 hours; then filter, After washing and drying, the surface-modified nano zinc oxide is obtained.

[0030] (2) According to the above weight, melt and blend the toughening agent and the modified formaldehyde scavenger in the internal mixer to make them uniformly dispersed to form toughened masterbatch. The mixing temperature of the internal mixer is 160°...

Embodiment 3

[0033] Embodiment 3: The polyoxymethylene modified material adopts the following raw materials and preparation methods.

[0034] (1) Weigh the following materials by weight: polyoxymethylene 100kg, vitamin E 0.5kg, surface-modified nano-manganese oxide 0.2kg, tris(dichloropropyl)phosphate (TDCPP) 0.6kg, benzophenone ultraviolet absorber 0.2kg, EPDM 1.0kg;

[0035] The modification method of nano-manganese oxide is: disperse nano-manganese oxide in ethanol aqueous solution with a volume ratio of 5:1; under the protection of inert gas, add silane coupling agent and titanate coupling agent, and stir at 80°C 3h; then filter, wash, and dry to obtain surface-modified nano zinc oxide.

[0036](2) According to the above weight, melt and blend the toughening agent and the modified formaldehyde scavenger in the internal mixer to make them uniformly dispersed to form toughened masterbatch. The mixing temperature of the internal mixer is 160°C; Then mix polyoxymethylene, toughening mast...

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PUM

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Abstract

The invention discloses a polyformaldehyde modified material. The polyformaldehyde modified material is formed by melting raw materials in parts by weight: 100 parts of polyformaldehyde, 0.1-0.5 part of polyformaldehyde stabilizing agent, 0.1-0.5 part of polyformaldehyde catcher, 0.4-0.8 part of antioxidant, 0.2-0.5 part of ultraviolet light absorber and 1.0-2.0 parts of flexibilizer, wherein the polyformaldehyde catcher is a nanometer powder body and the surface of the polyformaldehyde catcher is modified. The modified nanometer polyformaldehyde catcher is adopted, so that the polyformaldehyde modified material has good dispersibility, and the compatibility of the polyformaldehyde modified material with the polymer is increased; because of the addition of the formaldehyde absorber and the polyformaldehyde stabilizing agent, the decomposition of the polyformaldehyde is reduced during processing, the generation of irritant gas is reduced, and the harm to the human body is effectively reduced; and the flexibilizer and the stabilizing agent are added into the material, so that the polyformaldehyde mechanical property is improved, the melt index (MI) and the yellow index (YI) are changed a little, the impact toughness is improved, the processing times of the polyformaldehyde is increased and the production cost is effectively reduced. The material has the characteristics of little decomposition during processing, impact resistance and low production cost.

Description

technical field [0001] The invention relates to a modified plastic, in particular to a polyoxymethylene modified material and a preparation method thereof. Background technique [0002] Polyoxymethylene, also known as polyoxymethylene, English name polyxymethylene (referred to as POM), is one of the five major engineering plastics. Its regular molecular structure and crystallinity make it excellent in physical and mechanical properties. It is a thermoplastic resin with excellent comprehensive properties. It has high elastic modulus, hardness, rigidity and mechanical properties in a large temperature range. It can replace steel, copper, zinc, aluminum and other metal materials in many occasions. It is called "metal in plastic". As one of the five general-purpose engineering plastics, polyoxymethylene, the tensile strength of unmodified polyoxymethylene copolymer is generally 60MPa, and the tensile elastic modulus is 2600MPa. . Due to its high hardness, wear resistance, fati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L59/00C08L23/16C08L23/08C08L75/04C08K13/06C08K9/06C08K9/04C08K3/22C08K3/04
Inventor 张瑞玺房承宣王亚涛洪若瑜李建华
Owner KAILUAN GRP