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Preparation method of organic silicon-coated polytetrafluoroethylene anti-dripping agent

A technology of polytetrafluoroethylene and anti-drip agent, applied in the chemical industry, can solve the problems of restricting the anti-drip agent, affecting the compatibility of resin, deterioration of material mechanical properties and gloss, etc. Affinity performance, guaranteed mechanical properties and gloss effect

Inactive Publication Date: 2020-05-29
QUZHOU ZHONGTONG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The anti-dripping agent prepared by the above inventions and existing patents will affect the compatibility of the material resin, resulting in deterioration of the mechanical properties and gloss of the material, which limits the application of the anti-dripping agent

Method used

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  • Preparation method of organic silicon-coated polytetrafluoroethylene anti-dripping agent

Examples

Experimental program
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Effect test

Embodiment 1

[0025] A preparation method of polytetrafluoroethylene anti-dripping agent coated with silicone, the operation steps are:

[0026] Add 10g of (2,7-octadien-1-yl) succinic anhydride, 200g of surface-modified polytetrafluoroethylene dispersion into the reactor, then add 0.05g of chloroplatinic acid, 30g of dimethyl Stir silyl diethylamine evenly, then heat up to 80°C; keep warm for 2 hours, then add 0.5g of ammonium persulfate, 0.02g of 1-allyl-3-ethylimidazolium tetrafluoroborate, stir and mix evenly ; keep the temperature at 80°C for 1 hour, add 0.1mol / L sodium hydroxide solution to adjust the pH=8, filter, and dry to obtain the silicone-coated polytetrafluoroethylene anti-dripping agent.

[0027] Described surface-modified polytetrafluoroethylene dispersion liquid, its preparation method is as follows:

[0028] Add 0.1kg of palladium chloride and 0.05kg of stannous chloride into 1000kg of pure water, stir and mix evenly, adjust the pH value to 1 with hydrochloric acid, then...

Embodiment 2

[0034] A preparation method of polytetrafluoroethylene anti-dripping agent coated with silicone, the operation steps are:

[0035] 12g of (2,7-octadien-1-yl) succinic anhydride and 230g of surface-modified polytetrafluoroethylene dispersion were added to the reactor, then 0.09g of chloroplatinic acid and 37g of dimethyl Stir silyl diethylamine evenly, then heat up to 87°C; keep warm for 3 hours, then add 0.9g of ammonium persulfate, 0.06g of 1-allyl-3-ethylimidazolium tetrafluoroborate, stir and mix evenly ; keep the temperature at 85°C for 2 hours, add 0.35mol / L sodium hydroxide solution to adjust the pH=8, filter, and dry to obtain the silicone-coated polytetrafluoroethylene anti-dripping agent.

[0036] Described surface-modified polytetrafluoroethylene dispersion liquid, its preparation method is as follows:

[0037]Add 0.42kg of palladium chloride and 0.27kg of stannous chloride into 1300kg of pure water, stir and mix evenly, adjust the pH value to 2 with hydrochloric a...

Embodiment 3

[0043] A preparation method of polytetrafluoroethylene anti-dripping agent coated with silicone, the operation steps are:

[0044] 16g of (2,7-octadien-1-yl) succinic anhydride, 300g of surface-modified polytetrafluoroethylene dispersion liquid, join in the reactor, then add 0.3g of chloroplatinic acid, 45g of dimethyl Stir silyl diethylamine evenly, then heat up to 95°C; keep warm for 5 hours, then add 2g of ammonium persulfate, 0.2g of 1-allyl-3-ethylimidazolium tetrafluoroborate, stir and mix evenly; Keep the temperature at 95°C for 5 hours, add 0.5mol / L sodium hydroxide solution to adjust the pH to 10, filter, and dry to obtain the silicone-coated polytetrafluoroethylene anti-dripping agent .

[0045] Described surface-modified polytetrafluoroethylene dispersion liquid, its preparation method is as follows:

[0046] Add 0.84kg of palladium chloride and 0.52kg of stannous chloride into 1500kg of pure water, stir and mix evenly, adjust the pH value to 3 with hydrochloric a...

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Abstract

The invention relates to the field of chemical engineering, in particular to a preparation method of an organic silicon-coated polytetrafluoroethylene anti-dripping agent. The invention relates to a preparation method of an organic silicon-coated polytetrafluoroethylene anti-dripping agent. According to the method, a mixed solution of palladium chloride and stannous chloride is used for treating apolytetrafluoroethylene dry material under an ultrasonic condition to generate active groups on the surface of the polytetrafluoroethylene dry material, ultraviolet polymerization is performed at thesame time to graft amido bonds to the surface; and then organic silicon wraps the surface of polytetrafluoroethylene particles through hydrolysis polycondensation reaction of organic silicon, therebyobtaining the organic silicon coated polytetrafluoroethylene anti-dripping agent. By means of the anti-dripping agent, product particles and resin have better affinity, coating is more complete, thecompatibility between the material and resin is not affected, and the mechanical property and glossiness of the material are guaranteed.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a method for preparing an organosilicon-coated polytetrafluoroethylene anti-dripping agent. Background technique [0002] Polytetrafluoroethylene with a molecular weight of about 4 million to 5 million is mainly used in anti-dripping agents in the field of engineering plastics. PTFE resins are added to the formulation of engineering thermoplastics. There are three main types of PTFE used as an anti-dripping agent: pure powder type, emulsion type, and coated type. [0003] 201811056085.X relates to an anti-dripping agent with toughening effect and its synthesis method. The synthesis method includes: synthesis of organopolysiloxane core emulsion; synthesis of anti-dripping agent with toughening effect. The synthesis method of the invention polymerizes organosilicon and PTFE, and then sequentially coats soft monomers and hard monomers. The anti-dripping agent prepared not only has...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/12C08L51/00C08L43/04C08F230/08C08F226/06C08F259/08C08F220/56C08L23/12C08K3/22C08K5/03
CPCC08J3/126C08F230/08C08F259/08C08L23/12C08J2351/00C08J2443/04C08L2207/53C08L2201/02C08F226/06C08F220/56C08L51/003C08L43/04C08K3/2279C08K5/03
Inventor 许益生吴哥德许丽斯
Owner QUZHOU ZHONGTONG CHEM
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