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Tetrafluoroethylene-alkyl acrylate-perfluoroalkyl vinyl ether dispersion resin and microporous membrane prepared from same

A perfluoroalkyl vinyl ether and alkyl acrylate technology, which is applied in the field of microporous membranes, can solve the problems of low surface energy and difficult processing of polytetrafluoroethylene, and achieve increased surface energy, high adhesion, and expanded applications field effect

Inactive Publication Date: 2020-06-09
SUZHOU SHIHUA NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the defects of low surface energy and difficult processing of polytetrafluoroethylene, the applicant introduced different monomers for easy bonding with polyacrylate adhesives, polyurethane adhesives and silicone adhesives. Different ternary block copolymers to prepare three different dispersion resins

Method used

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  • Tetrafluoroethylene-alkyl acrylate-perfluoroalkyl vinyl ether dispersion resin and microporous membrane prepared from same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Table 1 Monomer formulation of Example 1.

[0028] .

[0029] The preparation steps of the dispersed resin are as follows.

[0030] Step 1. Pass the purified perfluoroalkyl vinyl ether monomer into a reaction kettle filled with 92.20 wt% high-purity water, 0.40 wt% ammonium persulfate, 1.20 wt% perfluorooctanoic acid ammonium and 6.20 wt% paraffin, at 100°C Stirring and polymerization under the condition of 2.0 MPa and 2.0 MPa for 15 minutes; the consumption ratio of aqueous phase and monomer total amount is 2.7: 1.0.

[0031] Step 2. Add the purified tetrafluoroethylene monomer and the purified n-butyl acrylate monomer in sequence, and continuously stir and polymerize to obtain a dispersion.

[0032] Step 3. After diluting the dispersion liquid in step 2 to 16.00 wt% under the condition of vigorous stirring, add acetone, and then vigorously stir the dilute solution. After the product micelle becomes agglomerated, the dispersion resin is obtained by decantation and ...

Embodiment 2

[0042] Table 2 Monomer formulation of Example 2.

[0043] .

[0044] The experimental procedure is similar to Example 1.

[0045] 180 of tetrafluoroethylene-n-butyl acrylate-perfluoroalkyl vinyl ether microporous membrane and polyacrylate adhesive 07475-00014-02 prepared by the formula in Example 2 o See Table 7 for peel strength.

Embodiment 3

[0047] Table 3 Monomer formulation of Example 3.

[0048] .

[0049] The experimental procedure is similar to Example 1.

[0050] 180 of tetrafluoroethylene-n-butyl acrylate-perfluoroalkyl vinyl ether microporous membrane and polyacrylate adhesive 07475-00014-02 prepared by the formula in Example 3 o See Table 7 for peel strength.

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Abstract

The invention discloses a synthesis method of tetrafluoroethylene-alkyl (meth) acrylate-perfluoroalkyl vinyl ether dispersion resin. The fluorine-containing polymer is prepared from a tetrafluoroethylene monomer, an alkyl (meth) acrylate monomer and a perfluoroalkyl vinyl ether monomer through dispersion polymerization in the presence of a water-soluble free radical initiator. The dispersion resincan be prepared into a microporous membrane through the processes of screening, mixing, curing, pre-forming, pasty extrusion, calendering, stretching, curing sintering and cooling. Since the microporous membrane contains the alkyl (meth) acrylate monomer, the viscosity between the microporous membrane and a polyacrylate adhesive is superior to that between a polytetrafluoroethylene microporous membrane and a polyacrylate adhesive. The microporous membrane with the polyacrylate adhesive is easy to install in a waterproof breathable member at an opening part of electronic equipment or lightingequipment so as to prevent water from invading from the opening part and prolong the service life of related equipment.

Description

technical field [0001] The invention discloses a dispersion resin and a microporous membrane prepared therefrom, and more specifically relates to a synthesis method and preparation of a tetrafluoroethylene-(meth)acrylic acid alkyl ester-perfluoroalkyl vinyl ether dispersion resin The microporous membrane has high viscosity with polyacrylate adhesive. Background technique [0002] PTFE has a wide range of high and low temperature applications, high electrical insulation, excellent chemical inertness, extremely low surface friction coefficient and excellent weather resistance, making it widely used in chemical, mechanical, electrical, Many fields such as construction and medical treatment have become indispensable special materials. Although PTFE has many advantages, it has defects such as poor creep resistance, poor wear resistance, high degree of crystallinity and extremely high melt viscosity, which limit its wide application to a certain extent. , if its surface energy i...

Claims

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Application Information

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IPC IPC(8): C08F214/26C08F216/14C08F220/18C08J5/18C08L27/18
CPCC08F214/262C08F216/1408C08J5/18C08J2327/18
Inventor 顾正青毕英慧周奎任陈启峰
Owner SUZHOU SHIHUA NEW MATERIAL TECH