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Water-soluble solidified Teflon (polytetrafluoroethylene) material for coating surfaces of rubber products and preparation method of water-soluble solidified Teflon (polytetrafluoroethylene) material

A technology for surface coating and rubber products, applied in the direction of coating, etc., can solve the problems of weak bonding force between resin and rubber material, low intermolecular force of fluorine-carbon chain, not environmental protection, etc., to achieve acid and alkali resistance and Excellent solvent resistance, good flexibility, and excellent weather resistance

Active Publication Date: 2019-03-19
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high electronegativity of the fluorine element in the molecule and the strong bond energy of carbon and fluorine, PTFE materials have excellent weather resistance. However, most PTFE products are molded and sintered at high temperature, which is difficult for rubber materials. The surface is coated, and due to the extremely low intermolecular force of the fluorine-carbon chain, it is non-sticky, which leads to a weak bond between the resin and the rubber material
[0003] At present, there are mainly two types of Teflon resins for coating, one is dissolved in polar solvents, which can be cured at room temperature, but is not environmentally friendly; the other is water-based, but requires high temperature curing, which is only suitable for metal surface treatment

Method used

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  • Water-soluble solidified Teflon (polytetrafluoroethylene) material for coating surfaces of rubber products and preparation method of water-soluble solidified Teflon (polytetrafluoroethylene) material
  • Water-soluble solidified Teflon (polytetrafluoroethylene) material for coating surfaces of rubber products and preparation method of water-soluble solidified Teflon (polytetrafluoroethylene) material

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0029] 1) Add 130.14g of hydroxyethyl methacrylate monomer and 262.35g of 1,6-hexamethylene diisocyanate monomer into the reactor, and react at room temperature for 1 hour;

[0030] 2) Add 150.09g of dihydroxysuccinic acid to continue the reaction for 0.5h;

[0031] 3) After the reaction, add 40g of 5% sodium hydroxide aqueous solution for neutralization to obtain the macromonomer;

[0032] 4) Then add 500g of solvent butyl acetate into the dissolving tank, start stirring and mixing, slowly add 0.2g of initiator dibenzoyl peroxide under stirring, and stir to dissolve it;

[0033] 5) Vacuumize the 2L polymerization kettle, replace with nitrogen, and then vacuum again, and use the vacuum in the polymerization kettle to suck the mixed solution of macromonomer and initiator into the polymerization kettle;

[0034] 6) The polymerization kettle is evacuated again, the jacket is cooled with frozen brine, and the stirring is started. After the temperature drops to -10°C, the tetraflu...

example 2

[0037] 1) Add 116.12g of hydroxyethyl methacrylate monomer and 262.35g of 1,6-hexamethylene diisocyanate monomer into the reactor, and react at room temperature for 1 hour;

[0038] 2) Add 150.09g of dihydroxysuccinic acid to continue the reaction for 0.5h;

[0039] 3) After the reaction, add 40g of 5% sodium hydroxide aqueous solution for neutralization to obtain the macromonomer;

[0040] 4) Then add 500g of solvent butyl acetate into the dissolving tank, start stirring and mixing, slowly add 0.2g of initiator dibenzoyl peroxide under stirring, and stir to dissolve it;

[0041] 5) Vacuumize the 2L polymerization kettle, replace with nitrogen, and then vacuum again, and use the vacuum in the polymerization kettle to suck the mixed solution of macromonomer and initiator into the polymerization kettle;

[0042] 6) The polymerization kettle is evacuated again, the jacket is cooled with frozen brine, and the stirring is started. After the temperature drops to -15°C, the tetraflu...

example 3

[0045] 1) Add 86.09g of methylol acrylate monomer and 262.35g of 1,6-hexamethylene diisocyanate monomer into the reactor, and react at room temperature for 1 hour;

[0046] 2) Add 150.09g of dihydroxysuccinic acid to continue the reaction for 0.5h;

[0047] 3) After the reaction, add 40g of 5% sodium hydroxide aqueous solution for neutralization to obtain the macromonomer;

[0048] 4) Then add 500g of solvent butyl acetate into the dissolving tank, start stirring and mixing, slowly add 0.2g of initiator dibenzoyl peroxide under stirring, and stir to dissolve it;

[0049] 5) Vacuumize the 2L polymerization kettle, replace with nitrogen, and then vacuum again, and use the vacuum in the polymerization kettle to suck the mixed solution of macromonomer and initiator into the polymerization kettle;

[0050] 6) The polymerization kettle was evacuated again, the jacket was cooled with frozen brine, and the stirring was started. After the temperature dropped to -20°C, the tetrafluoroe...

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Abstract

The invention discloses a water-soluble solidified Teflon (polytetrafluoroethylene) material for coating surfaces of rubber products and a preparation method of the water-soluble solidified Teflon (polytetrafluoroethylene) material, and relates to a weather-fastness coating material and a preparation method thereof. The preparation method includes: adding functional monomers, namely hydroxyethyl acrylate monomer and diisocyanate monomer into a reactor, adding in dihydrobutanedioic acid for continuous reaction, adding a solvent, namely butyl acetate, into a dissolving tank, adding in an initiator, namely dibenzoyl peroxide, slowly with stirring, sucking a mixed solution of the macromonomer and the initiator into a polymerizer, and cooling to the room temperature; further, recycling un-reacted tetrafluoroethylene monomer into a recovery tank through a monomer recycling system and then filtering and discharging. The molecular structure of the material comprises the tetrafluoroethylene structure having weather fastness, the urethane-bond structure having good flexibility, the hydroxy structure having high adhesive force and the carboxylate radical structure capable of meeting requirement on water solubility. Solidification at room temperature can be realized; the defect that existing water-soluble Teflon resin for coating rubber needs high-temperature solidification is overcome; thus, the material has wide marketing prospect.

Description

technical field [0001] The invention relates to a weather-resistant coating and a preparation method thereof, in particular to a water-soluble cured Teflon material coated on the surface of a rubber product and a preparation method thereof. Background technique [0002] The weather resistance of rubber products refers to a series of aging phenomena such as fading, discoloration, cracking, pulverization and strength reduction of rubber materials due to the influence of external conditions such as sunlight, temperature changes, and wind and rain. The weather resistance of ordinary rubber materials is generally not good. This is because the molecular structure of most rubber products contains a small amount of double bonds, which are prone to aging in natural environments (such as ultraviolet rays), and the surface coating method is used to improve its weather resistance. Weather resistance is a great way to do that. Due to the high electronegativity of the fluorine element in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/00C08F214/26C08F214/24C08G18/34C08G18/67C08G18/73C08J7/04C09D151/08
CPCC08F283/008C08G18/348C08G18/672C08G18/73C08J7/04C08J2321/00C08J2451/08C09D151/08C08G18/0823C08F214/265C08F214/245
Inventor 张文政蒋宁黄丽张婷婷
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY