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Fluorine-containing composition, and membrane thereof

A composition and polymer technology, applied in the field of fluorine-containing polymers, can solve problems such as limitation, reduction of resin yield and accumulation, achieve excellent alkali resistance and processing performance, increase resin yield, and reduce production costs Effect

Active Publication Date: 2012-07-25
ZHEJIANG GREEN NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the molecular structure contains carbon-hydrogen (bond energy: 414kJ / mol) and carbon-chlorine (bond energy: 328kJ / mol) bonds that are weaker than carbon-fluorine bonds (bond energy: 485kJ / mol), the molecular chain There are defects in the segment, resulting in its chemical corrosion resistance is not as good as perfluorinated polymers such as polytetrafluoroethylene, perfluoroethylene propylene, etc., and its use in areas with high performance requirements such as aerospace, chemical machinery, etc. is subject to certain restrictions. At the same time, non-perfluorinated fluoropolymers are easily bonded to the die during processing, resulting in accumulation, lower resin yield and damage to processing equipment
Therefore developing a kind of non-perfluorinated fluoropolymer composition with good corrosion resistance and processability to expand its use is an urgent task in this industry, but the prior art cannot solve the above problems

Method used

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  • Fluorine-containing composition, and membrane thereof
  • Fluorine-containing composition, and membrane thereof
  • Fluorine-containing composition, and membrane thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 70 parts of polyvinylidene fluoride homopolymer powder, 1 part of polytetrafluoroethylene superfine powder with a weight average molecular weight of 5000 and an average particle diameter of 0.01 μm, 1 part of titanium dioxide, 0.01 part of isopropyl tri(dioctyl pyrophosphate Acyloxy) titanate coupling agent, after high-speed mixing, thermoplastic processing and granulation at 200-220 ° C, and then extruded into a film with an average thickness of 5 μm through an extruder at 210-230 ° C, and rolled. During the processing, there is no bonding at the die mouth, no accumulation of material, and a high film forming rate.

Embodiment 2

[0021] 100 parts of vinylidene fluoride-hexafluoropropylene copolymer powder, 20 parts of polytetrafluoroethylene superfine powder with a weight average molecular weight of 200,000 and an average particle diameter of 20 μm, 30 parts of silicon dioxide, and 5 parts of γ-aminopropyltriethyl Oxysilane coupling agent, after high-speed mixing, it is granulated by thermoplastic processing at 180-210 ° C, and then extruded by an extruder at 200-230 ° C to form a film with an average thickness of 10 μm, and it is wound. During the processing, there is no bonding at the die mouth, no accumulation of material, and a high film forming rate.

Embodiment 3

[0023] 90 parts of polyvinyl fluoride copolymer powder, 10 parts of polytetrafluoroethylene superfine powder with a weight average molecular weight of 100000 and an average particle diameter of 10 μm, 15 parts of calcium carbonate, 2 parts of isopropoxy aluminate, 10 parts of methyl acrylate Ester-methyl methacrylate copolymer, after high-speed mixing, heat-plasticized at 180-210°C for granulation, then extruded by extruder at 200-230°C to form a film with an average thickness of 50 μm, and rolled. During the processing, there is no bonding at the die mouth, no accumulation of material, and a high film forming rate.

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Abstract

The invention discloses a fluorine-containing composition, and a membrane thereof. The composition comprises components of, by weight: 70-100 parts of a non-perfluoro fluorine-containing polymer, 1-20 parts of polytetrafluoroethylene ultrafine powder, 1-30 parts of a mineral filling material, 0.01-5 parts of a modifying agent, and 0-20 parts of an acrylate polymer. The fluorine-containing composition provided by the invention has excellent alkali resistance and processing performance. The composition is subject to thermoplastic-process granulation under a temperature of 180-300 DEG C, and is extruded under a temperature of 200-320 DEG C by an extruder, such that a membrane with a thickness of 5-50mum and good flatness is obtained. During the processing procedure, no bonding with a die port occurs, and no material accumulation occurs. Therefore, a resin yield is improved, and a production cost is reduced.

Description

technical field [0001] The invention relates to the field of fluorine-containing polymers, in particular to a fluorine-containing composition modified by polytetrafluoroethylene ultrafine powder and a film prepared from the fluorine-containing composition. Background technique [0002] Non-perfluorinated fluoropolymers such as polyvinyl fluoride, polyvinylidene fluoride, ethylene-tetrafluoroethylene, etc. have good rigidity, hardness, comprehensive strength, cold flow resistance, etc., and can be melt-processed and formed. Anti-corrosion, construction and other fields are widely used. However, since the molecular structure contains carbon-hydrogen (bond energy: 414kJ / mol) and carbon-chlorine (bond energy: 328kJ / mol) bonds that are weaker than carbon-fluorine bonds (bond energy: 485kJ / mol), the molecular chain There are defects in the segment, resulting in its chemical corrosion resistance is not as good as perfluorinated polymers such as polytetrafluoroethylene, perfluoroet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/14C08L27/16C08L27/12C08L27/18C08L33/08C08L33/10C08K3/22C08K3/30C08K3/26C08K3/36C08K3/34
Inventor 徐洪徐诚陈向荣付铁柱张宏谢根发
Owner ZHEJIANG GREEN NEW MATERIALS
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