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Preparation method of polytetrafluoroethylene core-shell polymer containing rare earth

A polytetrafluoroethylene and polymer technology, which is applied in the field of preparation of core-shell polymers, can solve the problems of easy agglomeration of PTFE particles and the like

Inactive Publication Date: 2016-09-21
QUZHOU ZHONGTONG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The stability of the PTFE dispersion of the above disclosed technology is usually lower than that of other polymer emulsions, and the disadvantage that PTFE particles are easy to agglomerate will appear when subjected to greater shear

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1). Synthesis of seed emulsion

[0021] First, the PTFE dispersion liquid of 100Kg (solid content 40wt%), the bis(tricarbonyl cyclopentadiene molybdenum) of 0.2Kg, the (3R)-1-[4,4-bis(3-methylthiophene) of 0.05Kg 2-base) but-3-enyl] piperidine-3-carboxylic acid, deionized water of 150Kg, OP-10 alkylphenol polyoxyethylene of 1Kg add in 500L reactor, add 1Kg potassium persulfate to initiate polymerization, in After adding 0.05Kg of bis(pentamethylcyclopentadiene)cobalt and 7Kg of butyl acrylate dropwise within 3 hours, and keeping the temperature at 70°C for 4 hours, the seed emulsion can be prepared.

[0022] 2).Core-shell polymerization

[0023] Add the OP-10 alkylphenol polyoxyethylene of 1Kg in the above-mentioned seed emulsion, 1Kg potassium persulfate, under N2 protection, the temperature is raised to 70°C, 15Kg of styrene, 1-heptene-1,2-diboronic acid bis( Add 1Kg of 2,3-dimethyl-2,3-butanediol) ethyl ester within 5 hours, and keep warm for 4 hours to prepare the...

Embodiment 2

[0025] 1). Synthesis of seed emulsion

[0026] First, the PTFE dispersion of 100Kg (solid content 30wt%), the bis(tricarbonyl cyclopentadiene molybdenum) of 0.1Kg, the (3R)-1-[4,4-bis(3-methylthiophene) of 0.01Kg Add 2-yl)but-3-enyl]piperidine-3-carboxylic acid, 100Kg of deionized water, 0.5Kg of OP-10 alkylphenol polyoxyethylene into a 500L reactor, and add 0.5Kg of potassium persulfate to initiate polymerization , 0.01Kg of bis(pentamethylcyclopentadienyl)cobalt and 5Kg of butyl acrylate were added dropwise within 1 hour, and kept at 50°C for 2 hours to discharge the material, so that the seed emulsion could be prepared.

[0027] 2).Core-shell polymerization

[0028] Add 0.5Kg of OP-10 alkylphenol polyoxyethylene, 0.5Kg of potassium persulfate to the above seed emulsion, raise the temperature to 50°C under the protection of N2, add dropwise 5Kg of styrene, 1-heptene-1,2-diboronic acid Add 0.5Kg of bis(2,3-dimethyl-2,3-butanediol) ethyl ester within 1 hour, and keep warm fo...

Embodiment 3

[0030] 1). Synthesis of seed emulsion

[0031] First, the PTFE dispersion of 100Kg (solid content 60wt%), the bis(tricarbonyl cyclopentadiene molybdenum) of 0.5Kg, the (3R)-1-[4,4-bis(3-methylthiophene) of 0.1Kg 2-base) but-3-enyl] piperidine-3-carboxylic acid, deionized water of 300Kg, OP-10 alkylphenol polyoxyethylene of 2Kg add in 500L reactor, add 2Kg potassium persulfate to initiate polymerization, in After adding 0.1Kg of bis(pentamethylcyclopentadienyl) cobalt and 10Kg of butyl acrylate dropwise within 5 hours, and keeping the temperature at 80°C for 6 hours, the seed emulsion can be prepared.

[0032] 2).Core-shell polymerization

[0033] Add the OP-10 alkylphenol polyoxyethylene of 2Kg in the above-mentioned seed emulsion, 2Kg potassium persulfate, under N2 protection, the temperature is raised to 80°C, 20Kg of styrene, 1-heptene-1,2-diboronic acid bis( Add 2Kg of 2,3-dimethyl-2,3-butanediol) ethyl ester within 8 hours, and keep warm for 6 hours to prepare the core-...

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Abstract

The invention relates to a preparation method of a polytetrafluoroethylene core-shell polymer containing rare earth. The polytetrafluoroethylene polymer consists of a core and a shell, wherein the shell is a polymer of a polytetrafluoroethylene emulsion, bis(tricarbonyl cyclopentadienyl molybdenum) and (3R)-1-[4,4-bis(3-methyl thiophene)-2-yl)but-3-enyl]piperidine-3-carboxylic acid, butyl acrylate and bis(pentamethylcyclopentadiene)cobalt; the shell is a polymer of styrene, 1-heptylene-1,2-hypoboric acid bis(2,3-dimethyl-2,3-butanediol)ethyl ester; the PTFE (Polytetrafluoroethylene) composite emulsion with good stability and coating property is prepared by adopting seeded emulsion polymerization.

Description

technical field [0001] The invention relates to a preparation method of a core-shell polymer, in particular to a preparation method of a rare earth-containing polytetrafluoroethylene core-shell polymer. Background technique [0002] Polytetrafluoroethylene (PTFE) has the characteristics of chemical corrosion resistance, wear resistance, heat resistance, and low surface tension, but it has poor compatibility with other polymer materials and is difficult to disperse in other polymer materials. Surface modification is an important way to improve the dispersion and interfacial compatibility of PTFE, but the bond energy of the C-F bond is high, which requires highly reactive chemicals (such as sodium naphthalene), high-energy (such as plasma) surface radiation or high-energy irradiation / surface Grafting treatment can achieve surface modification, which is difficult. Using PTFE particles as seeds, coating the surface of PTFE particles with suitable polymers through emulsion polym...

Claims

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Application Information

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IPC IPC(8): C08F285/00C08F212/08C08F230/06
CPCC08F285/00
Inventor 许益生吴哥德
Owner QUZHOU ZHONGTONG CHEM
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