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Method for toughening polyformaldehyde under synergistic effect of thermoplastic polyurethane and rigid particle calcium carbonate

A technology of thermoplastic polyurethane and rigid particles, which is applied in the field of polyoxymethylene toughening, can solve the problems of poor toughening effect of polyoxymethylene products, etc., and achieve the effect of reducing the granulation process, excellent comprehensive performance, and simple equipment

Inactive Publication Date: 2018-12-11
上海飞尔汽车零部件股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The problem to be solved by the present invention is that the toughening effect of existing polyoxymethylene products is not good

Method used

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  • Method for toughening polyformaldehyde under synergistic effect of thermoplastic polyurethane and rigid particle calcium carbonate
  • Method for toughening polyformaldehyde under synergistic effect of thermoplastic polyurethane and rigid particle calcium carbonate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A method of thermoplastic polyurethane synergistic rigid particle calcium carbonate toughened polyoxymethylene:

[0032] Weigh 10 parts by weight of TPU, 4 parts by weight of calcium carbonate masterbatch, and 86 parts by weight of POM pellets containing compatibilizer MDI, and put the three into a plastic mixer at the same time to stir and mix evenly; dry the mixture in a drying oven Dry at 90°C for 2 to 4 hours; put the dried mixture into an injection molding machine, and perform melt injection molding at a temperature of 160 to 200°C in sections. The injection speed is medium, the injection cycle is 45s, and the mold temperature is 50°C. Get POM products.

Embodiment 2

[0034] A method of thermoplastic polyurethane synergistic rigid particle calcium carbonate toughened polyoxymethylene:

[0035] Weigh 15 parts by weight of TPU, 4 parts by weight of calcium carbonate masterbatch, and 81 parts by weight of POM pellets containing compatibilizer MDI, and put the three into a plastic mixer at the same time to stir and mix evenly; Dry at 90°C for 2 to 4 hours; put the dried mixture into an injection molding machine, and carry out melt injection molding at a temperature of 160 to 200°C in sections. The injection speed is medium, the injection cycle is 45s, and the mold temperature is 50°C. Injection molding to obtain POM products.

Embodiment 3

[0037] A method of thermoplastic polyurethane synergistic rigid particle calcium carbonate toughened polyoxymethylene:

[0038] Weigh 20 parts by weight of TPU, 4 parts by weight of calcium carbonate masterbatch, and 76 parts by weight of POM pellets containing compatibilizer MDI, and put the three into a plastic mixer at the same time to stir and mix evenly; dry the mixture in a drying oven Dry at 90°C for 2 to 4 hours; put the dried mixture into an injection molding machine, and perform melt injection molding at a temperature of 160 to 200°C in sections. The injection speed is medium, the injection cycle is 45s, and the mold temperature is 50°C. Get POM products.

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Abstract

The invention discloses a method for toughening polyformaldehyde under a synergistic effect of thermoplastic polyurethane and rigid particle calcium carbonate. The method is characterized by treatingpolyformaldehyde with a toughening agent, wherein the toughening agent comprises POM containing bulking agent MDI, TPU and calcium carbonate master batch. According to the method disclosed by the invention, the comprehensive mechanical property of polyformaldehyde is promoted, the equipment is simple and the operation is easy.

Description

technical field [0001] The invention relates to a simple method for blending thermoplastic polyurethane and calcium carbonate to toughen polyoxymethylene, which belongs to the technical field of polyoxymethylene toughening. Background technique [0002] Polyoxymethylene is referred to as POM (Polyoxymethylene or polyacetal), and its molecular formula is Known as "super steel" or "sport steel", also known as polyoxymethylene. The English abbreviation is POM. Usually formaldehyde is polymerized to obtain polymers. POM is a hard, dense material with a smooth, shiny surface and translucent thin-walled portions. The burning characteristics are easy to burn, the upper end of the flame is yellow, the lower end is blue, molten dripping occurs, and there is a strong irritating smell of formaldehyde and fishy smell. Polyoxymethylene is generally opaque and has good colorability, specific gravity of 1.41-1.43 g / cubic centimeter, and molding shrinkage rate of 1.2-3.0%. [0003] PO...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L59/00C08L75/04C08K3/26C08G18/54B29C45/76B29C45/78
CPCB29C45/76B29C45/78B29C2043/5816C08G18/54C08K2003/265C08L59/00C08L2205/06C08L75/04C08K3/26
Inventor 胡红阳
Owner 上海飞尔汽车零部件股份有限公司
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