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Thermal stable polyoxymethylene containing high-efficiency anti-oxidant and method for producing the same

A technology of thermal stability and polyoxymethylene, which is applied in the field of thermal stability polyoxymethylene and its preparation, can solve the problems of high price, material color change, product surface deterioration, etc., to reduce production costs, reduce overall consumption, and compound effect Reduced effect

Inactive Publication Date: 2009-08-19
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN1196073A discloses that the existing POM resin cannot meet the thermal stability requirements, and deposits are produced on the mold, which deteriorates the surface of the product
[0005] At present, Irganox259 and Irganox245 phenolic antioxidants are often used in the production and application of POM at home and abroad. Experiments have proved that this type of antioxidant has a significant thermal stability effect on POM, which can greatly improve the thermal stability of POM, and is suitable for POM. Excellent antioxidant, but its dosage is large and its price is relatively expensive, which has become one of the main factors affecting the production cost of POM
Wang Kezhi, Fine Petrochemical Industry, 1993(3): 46-52 describes that the antioxidants Irganox1010 and Irganox1076 are cheap, but because of the symmetrical hindered phenol structure, it is easy to produce quinone coloring substances and cause material color changes
Numerous research results show that higher dosage of Irganox1010 will cause yellowing and discoloration of POM products

Method used

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  • Thermal stable polyoxymethylene containing high-efficiency anti-oxidant and method for producing the same
  • Thermal stable polyoxymethylene containing high-efficiency anti-oxidant and method for producing the same
  • Thermal stable polyoxymethylene containing high-efficiency anti-oxidant and method for producing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] POM resin 10Kg and tetrakis [β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester 30g, three (2,4,-di-tert-butylphenyl) phosphite 10g , allyl phenol 10g, melamine 20g, calcium carbonate 20g, glycerol monostearate 10g are added in the high-speed mixer and mixed, and then melted and mixed with a vented twin-screw extruder, extruded and granulated. Screw speed, 50 rpm; barrel temperature, 140-190°C.

Embodiment 2

[0045] POM resin 10Kg and N, N'-bis-[3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionyl] hexamethylenediamine 40g, pentaerythritol disulfite (octadecyl) ester 30g, Add 30g of hydroxylamine, 10g of dicyandiamide, 10g of magnesium oxide, and 20g of bisstearamide into a high-speed mixer for mixing, then melt and knead with a vented twin-screw extruder, and extrude to granulate. Screw speed, 90 rpm; barrel temperature, 150-200°C.

Embodiment 3

[0047] POM resin 10Kg and N, N'-bis-[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyl]hexamethylenediamine 20g, pentaerythritol bisphosphite bis(2,4-di 20g of tert-butylphenyl) ester, 10g of bisphenol monoacrylate, 70g of urea, 7g of calcium silicate, and 10g of pentaerythritol tristearate were mixed in a high-speed mixer, and then melted and mixed with a vented twin-screw extruder. Refining, extruding and granulating. Screw speed, 150 rpm; barrel temperature, 170-230°C.

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Abstract

The invention discloses a thermally stable polyformaldehyde containing high-efficacy antioxidant and a preparation method thereof. The invention is characterized in that 100 parts of polyformaldehyde resin, 0.1 to 0.3 part of primary antioxidant, 0.1 to 0.3 part of complemental antioxidant 1, 0.05 to 0.5 part of complemental antioxidant 2, 0.05 to 2 parts of formaldehyde absorbent, 0.05 to 0.5 part of methanoic acid absorbent and 0.05 to 0.5 part of lubricant by part by weight are put into a high-speed mixer to be mixed and then are melted and mixed by an exhaust double-screw extruder to be extruded and granulated; the rotating speed of a screw is 30-150 revolution / minute, the temperature of a barrel is 140-230 DEG C; and the thermally stable polyformaldehyde is obtained.

Description

technical field [0001] The invention relates to a thermally stable polyoxymethylene containing high-efficiency antioxidant and a preparation method thereof, belonging to the field of polymer material processing. Background technique [0002] Polyoxymethylene (POM) is [-CH 2 -O-] main chain, unbranched, high melting point, high density, high crystalline thermoplastic engineering plastics, with high strength and rigidity, excellent creep resistance, fatigue resistance, inherent lubricity, wear resistance It is the closest to metal in engineering plastics, and can be used to replace copper, aluminum, zinc and other non-ferrous metals and alloy products. It is widely used in electronics, automobiles, light industry, machinery, chemicals, building materials, etc. field. [0003] Due to the special molecular structure of POM, its thermal stability is poor, so the thermal stabilization of POM is the most important and basic key technology in its synthesis or processing applicatio...

Claims

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Application Information

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IPC IPC(8): C08L59/02C08K13/02C08K5/103C08K5/138C08K5/524C08K5/42C08K5/17C08K5/105
Inventor 叶林甘露赵晓文
Owner SICHUAN UNIV
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