Teflon coating material and application thereof

A Teflon and coating technology, applied in the direction of coating, can solve the problems of no production of Teflon coating materials and complex components, and achieve the effect of prolonging the time of complete adhesion, prolonging the replacement time and improving production efficiency.

Active Publication Date: 2019-05-14
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the complex components of Teflon coatings, its production technology has been monopolized by a few companies such as DuPont and South Korea's Samsung, and there is currently no technology for producing Teflon coatings in China.

Method used

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  • Teflon coating material and application thereof
  • Teflon coating material and application thereof
  • Teflon coating material and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0025] According to a typical embodiment of the present invention, the polytetrafluoroethylene dispersion includes, in parts by weight: 20-35 parts of polytetrafluoroethylene with an average particle size ≤ 20 μm, 5-15 parts of xylene, N,N-dimethyl 40-60 parts of formamide, 3-10 parts of deionized water and 0.1-0.5 parts of fluorocarbon surfactant. The polytetrafluoroethylene dispersion with such components and proportions has high hardness, strong adhesion, uniform, smooth and glossy coating.

[0026] Preferably, the average particle size of the mica powder is ≤15 μm, and the average particle size of the graphite powder is ≤15 μm. The dispersion effect of the mixed solution of mica powder and graphite powder within this particle size range is good, and the wear resistance is good.

[0027] Preferably, the mixed solution of the topcoat includes, in parts by weight: 100 parts of imidazoline, 45-65 parts of toluene, 10-20 parts of deionized water, and 5-10 parts of non-ionic su...

Embodiment 1

[0060] (1) Preparation of topcoat

[0061] Take 3 grams of polytetrafluoroethylene (average particle size ≤ 20 μm), 1 gram of xylene, 5 grams of N,N~dimethylformamide, 1 gram of deionized water and 0.03 gram of fluorocarbon surfactant FN~6810 to prepare polytetrafluoroethylene To tetrafluoroethylene suspension, add 0.5 g of mica powder and 0.05 g of chromium trioxide, and stir thoroughly. Then slowly add 2 grams of the prepared mixed solution (1.2 gram of imidazoline, 0.7 gram of toluene, 0.2 gram of deionized water, 0.1 gram of TritonX~100), and finally add 1 gram of terpolymer aqueous solution (methyl methacrylate 40% aqueous solution of ester / ethyl acrylate / methacrylic acid (39 / 57 / 4) terpolymer), stir well until the appearance becomes sticky.

[0062] (2) Preparation of primer

[0063] First prepare the polyamic acid salt solution: add 0.2 g of trimellitic anhydride and 0.2 g of p-phenylenediamine to 5 g of dimethylacetamide solution, and stir until completely dissolved. ...

Embodiment 2

[0073] (1) Preparation of topcoat

[0074] Take 3 grams of polytetrafluoroethylene (average particle size ≤ 20 μm), 1 gram of xylene, 5 grams of N,N~dimethylformamide, 1 gram of deionized water and 0.03 gram of fluorocarbon surfactant FN~6810 to prepare polytetrafluoroethylene To tetrafluoroethylene suspension, add 0.5 g of mica powder and 0.05 g of chromium trioxide, and stir thoroughly. Then slowly add 2 grams of the prepared mixed solution (1.2 grams of imidazoline, 0.7 grams of toluene, 0.2 grams of deionized water, 0.1 grams of TritonX~100), and finally add 1.2 grams of terpolymer aqueous solution (methyl methacrylate 40% aqueous solution of ester / ethyl acrylate / methacrylic acid (39 / 57 / 4) terpolymer), stir well until the appearance becomes sticky.

[0075] (2) Preparation of primer

[0076] First prepare the polyamic acid salt solution: add 0.2 g of trimellitic anhydride and 0.2 g of p-phenylenediamine to 5 g of dimethylacetamide solution, and stir until completely diss...

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Abstract

The invention discloses a Teflon coating material and an application thereof. The Teflon coating material comprises a top coat and a primer, wherein the top coat comprises the following components inparts by weigh: 100 parts of polytetrafluoroethylene dispersion solutions, 1-5 parts of mica powder, 15-25 parts of mixed solutions, 0.1-1 part of metal oxide, 5-15 parts of binary thermoplastic copolymer dispersion solutions and 0.5-1 part of a nonionic surfactant; the primer comprises the following components in parts by weigh: 100 parts of polytetrafluoroethylene dispersion solutions, 5-10 parts of mica powder, 1-5 parts of graphite powder, 1-5 parts of metal oxide, 5-10 parts of polyphenylene sulfide, 20-40 parts of polyamic acid salt solutions, 20-40 parts of silica sol and 80-120 parts of deionized water. According to the Teflon coating material prepared by a composition, smooth, corrugated and burr-free extruded pipe products can be ensured, and the time for the coating material tocompletely adhere to the metal surface of an extrusion die is prolonged, and thus the replacement time of the extrusion die is prolonged, and the production efficiency is improved.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a Teflon coating and its application. Background technique [0002] As an important part of chemical building materials, plastic pipes are widely accepted by users for their superior performance, sanitation, environmental protection, and low consumption. Among them, the strong development momentum of PE pipes is the most eye-catching. Polyethylene pipes are used in a wide range of fields, among which water supply pipes and gas pipes are the two largest application markets. [0003] The polyethylene pipe production line includes extrusion host, pipe die shaping device, shaping die, cooling device, traction device, cutting device, collecting device and other parts. In pipe extrusion production, the surface finish, solid lubrication and friction coefficient of the extruder die and corner head will directly affect the performance and quality of the pipe product. At present, the ge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D127/18
Inventor 张利粉徐铁军张元礼王静江张利仁张卫东刘红宇吕明贺李政王永年黄荣福郭洪元崔月王大明王俊荣
Owner PETROCHINA CO LTD
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