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Method for improving critical cracking thickness of PTFE (Polytetrafluoroethylene) resin emulsion and applications of modified PTFE resin emulsion to non-stick coatings

A technology of polytetrafluoroethylene and resin emulsion, applied in coating, device for coating liquid on surface, surface pretreatment, etc., can solve the problem of small critical cracking film thickness of fluororesin, and improve the critical cracking film thickness , the effect of improving the appearance

Active Publication Date: 2011-04-06
ZHEJIANG PFLUON TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention aims to solve the problem of small critical cracking film thickness of fluororesin in the prior art, and provides a method for increasing critical cracking film thickness of polytetrafluoroethylene resin emulsion and modified polytetrafluoroethylene resin emulsion of the present invention Application on the non-stick coating, the method of the present invention can effectively improve the critical cracking film thickness value of polytetrafluoroethylene resin emulsion, the method of the present invention provides a kind of modified polytetrafluoroethylene resin emulsion, with this modification The non-stick coating obtained by coating with polytetrafluoroethylene resin emulsion has good performance

Method used

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  • Method for improving critical cracking thickness of PTFE (Polytetrafluoroethylene) resin emulsion and applications of modified PTFE resin emulsion to non-stick coatings

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Effect test

Embodiment 1

[0049] Get 166.7 parts of PTFE emulsion with 60% content (100 parts of solid content equivalent to PTFE), add 2.5 parts of methyltrimethoxysilane, stir with 10 rpm for 50 minutes, and operate according to the test method of the aforementioned critical film thickness value , the sintering condition is 380° C. for 5 minutes, and the critical film thickness is 15-18 μm.

Embodiment 2

[0051] Get 166.7 parts of PTFE emulsion with 60% content (100 parts of solid content equivalent to PTFE), add 5 parts of methyltrimethoxysilane, stir with 10 rpm for 40 minutes, operate according to the test method of the aforementioned critical film thickness value , the sintering condition is 380° C. for 5 minutes, and the critical film thickness is 20-21 μm.

Embodiment 3

[0053] Get 166.7 parts of PTFE emulsion with a content of 60% (100 parts of solid content equivalent to PTFE), add 7.5 parts of methyltrimethoxysilane, stir for 30 minutes at 10 rpm, and operate according to the test method of the aforementioned critical film thickness value , the sintering condition is 380° C. for 5 minutes, and the critical film thickness is 25-28 μm.

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Abstract

The invention relates to a method for improving the critical cracking thickness of PTFE (Polytetrafluoroethylene) resin emulsion. The method comprises the following step of: adding alkoxy silane to a PTFE resin emulsion under the conditions of normal temperature and normal pressure, stirring and uniformly mixing to obtain modified PTFE resin emulsion for coating, wherein the alkoxy silane has a general formula: R'y Si(OR)4-y, R' is phenyl, methyl or ethyl, OR is methoxy or ethoxy, y is 0 or 1, and the addition of the alkoxy silane is 2.5-15 percent by weight of the solid content (weight) of the PTFE resin emulsion. The modified PTFE resin emulsion is coated on a priming coat to obtain a non-stick coating through sintering, and the non-stick coating has the critical cracking thickness of at least 15 mum. The invention is suitable for preparing non-stick coating materials.

Description

technical field [0001] The invention relates to a method for increasing the critical cracking film thickness (that is, the critical film thickness) of a polytetrafluoroethylene resin emulsion, and a non-stick coating obtained thereby. Background technique [0002] Fluororesin is a kind of high molecular polymer containing fluorine atoms in its molecular structure. It has excellent high and low temperature resistance, dielectric properties, chemical stability, weather resistance, non-combustibility, non-stickiness and low friction coefficient. It is an indispensable and important material for all sectors of the national economy, especially cutting-edge science and technology and defense industry. The main varieties of fluororesin are polytetrafluoroethylene (PTFE), polychlorotrifluoroethylene (PCTFE), polyvinylidene fluoride (PVDF), ethylene-tetrafluoroethylene copolymer (ETFE), ethylene-trifluorochloroethylene copolymer (ECTFE), polyvinyl fluoride (PVF), tetrafluoroethylene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/18C08K5/5415C08K5/5419C09D127/18C09D7/12B05D3/02
Inventor 关建安毕大武史航王锡铭
Owner ZHEJIANG PFLUON TECH CO LTD
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