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Acrylate and acrylamide grafted polytetrafluoroethylene and highlight mirror surface wear-resistant flame-retardant polycarbonate material

A technology of flame retardant polycarbonate and PTFE, applied in the field of flame retardant materials, can solve the problems of exposed PTFE, high processing temperature, and easy cracking of the coating, so as to achieve easy operation and improve surface gloss. , the method is efficient

Pending Publication Date: 2022-03-08
WANHUA CHEMICAL (NINGBO) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the processing temperature of polycarbonate is high, and the cladding is easily broken during the melt extrusion process, resulting in the exposure of polytetrafluoroethylene and pitting
[0004] Patent CN106147187A uses organosilane type anti-dripping agent. Although polytetrafluoroethylene is coated with silicone to improve the compatibility and dispersion of polycarbonate, it cannot avoid the rupture of the coating layer and the exposure of polytetrafluoroethylene, thus Pitting on the surface of the workpiece

Method used

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  • Acrylate and acrylamide grafted polytetrafluoroethylene and highlight mirror surface wear-resistant flame-retardant polycarbonate material
  • Acrylate and acrylamide grafted polytetrafluoroethylene and highlight mirror surface wear-resistant flame-retardant polycarbonate material
  • Acrylate and acrylamide grafted polytetrafluoroethylene and highlight mirror surface wear-resistant flame-retardant polycarbonate material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Preparation of polytetrafluoroethylene anti-dripping agent A grafted with methyl acrylate and acrylamide

[0058] (1) Treat ultrafine polytetrafluoroethylene powder M530 and sodium-naphthalene treatment liquid according to 1:10 (molar ratio) for 10 minutes, then use acetone suction filtration to wash 5 times to remove excess sodium-naphthalene treatment liquid and organic impurities, Rinse with distilled water for 5 times to remove water-soluble impurities, and dry at 50°C to obtain activated polytetrafluoroethylene powder.

[0059] (2) 200g of activated polytetrafluoroethylene powder is added to the 2000g ethanol solution of methyl acrylate and acrylamide, wherein the concentration of methyl acrylate is 40wt%, and the concentration of acrylamide is 5wt%. React for 20 hours. After the reaction, the product was first washed with acetone for 3 times, and then repeatedly washed and filtered in deionized water for 5 times to remove organic impurities. Dry at 60° C. for 12...

Embodiment 2

[0061] Preparation of polytetrafluoroethylene anti-dripping agent B grafted with butyl acrylate and acrylamide

[0062] (1) Treat ultrafine polytetrafluoroethylene powder M530 and sodium-naphthalene treatment solution at a ratio of 1:0.5 for 1 minute, then filter and wash with acetone once to remove excess sodium-naphthalene treatment solution and organic impurities, and then rinse with distilled water Water-soluble impurities were removed once, and activated polytetrafluoroethylene powder was obtained after drying at 10°C.

[0063] (2) 200g of activated polytetrafluoroethylene powder is added to the 2000g ethanol solution of methyl acrylate and acrylamide, wherein the concentration of methyl acrylate is 20wt%, and the concentration of acrylamide is 8wt%. React for 2 hours. After the reaction, the product was first washed once with acetone, then repeatedly washed and filtered five times in deionized water to remove organic impurities. Dry at 20° C. for 5 hours to obtain an a...

Embodiment 3

[0065] Preparation of polytetrafluoroethylene anti-dripping agent C grafted with ethyl acrylate, butyl acrylate and acrylamide

[0066] (1) Treat ultrafine polytetrafluoroethylene powder M530 and sodium-naphthalene treatment liquid according to 1:5 (molar ratio) for 8 minutes, then use acetone suction filtration to wash 3 times to remove excess sodium-naphthalene treatment liquid and organic impurities, Rinse with distilled water for 5 times to remove water-soluble impurities, and dry at 40°C to obtain activated polytetrafluoroethylene powder.

[0067] (2) 200g of activated polytetrafluoroethylene powder is added in the 2000g ethanol solution of methyl acrylate, butyl acrylate and acrylamide, wherein the concentration of methyl acrylate is 10wt%, and the concentration of butyl acrylate is 20wt%, The concentration of acrylamide was 3 wt%, and the reaction was performed at 65°C for 6 hours. After the reaction, the product was first washed with acetone for 3 times, and then repe...

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Abstract

The invention discloses an acrylate and acrylamide grafted polytetrafluoroethylene and high-gloss mirror surface wear-resistant flame-retardant polycarbonate material. The high-gloss mirror-surface wear-resistant flame-retardant polycarbonate material is prepared from polycarbonate, a flame retardant, acrylate and acrylamide grafted polytetrafluoroethylene, an antioxidant, a lubricant and color master batches. The acrylic ester and the acrylamide are grafted on the surface of the polytetrafluoroethylene, so that the binding force between the polytetrafluoroethylene and the surface of the polycarbonate is improved, the dispersion of the polytetrafluoroethylene in a polycarbonate matrix is improved, the appearance pocking marks of a workpiece caused by agglomeration of the polytetrafluoroethylene are eliminated, and the surface glossiness of the polycarbonate is further improved; and the wear resistance of the polycarbonate is improved, so that the high-gloss mirror-surface wear-resistant flame-retardant polycarbonate material is prepared.

Description

technical field [0001] The invention belongs to the field of flame retardant materials, in particular to anti-dripping agents and polycarbonate modified materials. Background technique [0002] Polycarbonate materials have the characteristics of high gloss, high impact resistance, high heat resistance and excellent weather resistance, and are widely used in electronic appliances, home appliances, security and other fields. [0003] The fields of electronic appliances and home appliances require materials to be thin-walled and flame-retardant. Although polycarbonate has intrinsic flame retardancy, it is prone to dripping during combustion. Therefore, polycarbonate materials used in the fields of electronic appliances and home appliances need to add additional flame retardants to improve its flame retardant properties. In order to improve the flame retardancy of polycarbonate, in addition to adding flame retardants, it is also necessary to add anti-dripping agents to prevent ...

Claims

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Application Information

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IPC IPC(8): C08F259/08C08F220/14C08F220/18C08F220/56C08L69/00C08L51/00
CPCC08F259/08C08L69/00C08L2201/02C08F220/14C08F220/56C08F220/1804C08L51/003
Inventor 颜晓捷陈连清祁先勇李万庆孙晓燏石耀东曲泽明张振威
Owner WANHUA CHEMICAL (NINGBO) CO LTD
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