Environment protection heat-proof acrylic resin insulation paint

A technology of acrylic resin and insulating coating, applied in the direction of fireproof coating, coating, etc., can solve the problems of poor stability, large viscosity change, poor temperature resistance of acrylic resin, etc., and achieve good interlayer resistance, corrosion resistance, and antirust performance Highlight and improve the effect of heat resistance

Active Publication Date: 2008-09-03
MAANSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using acrylic emulsion to form a film requires the addition of film-forming aids to obtain a relatively dense film. Due to the poor stability of the acrylic resin emulsion and large changes in viscosity, it is difficult to meet the requirements of the preparation technology for dense films of electrical steel
According to the current application status of insulating coatings on electrical steel, the coating needs to be cured at high temperature, and electrical steel products need to be annealed at high temperature. Sheet insulation properties

Method used

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  • Environment protection heat-proof acrylic resin insulation paint
  • Environment protection heat-proof acrylic resin insulation paint
  • Environment protection heat-proof acrylic resin insulation paint

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1. Preparation of nano-inorganic modified acrylic emulsion:

[0033] a) Take 20 parts of butyl acrylate, 13 parts of methyl methacrylate, 28 parts of styrene, 2.7 parts of acrylic acid, 1 part of compound emulsifier of sodium lauryl sulfate and alkylphenol polyoxyethylene ether, 1 part Sodium bicarbonate, 0.5 parts of N-methylolacrylamide, and 80 parts of water were mixed and stirred at room temperature for 1 hour to form a pre-emulsion.

[0034] b) 1.5 parts of ammonium persulfate and 1 part of silica sol were added to 30 parts of water, and mixed and stirred for 1 hour at room temperature to form a modifier suspension.

[0035] c) While stirring at room temperature, mix 10 parts of pre-emulsion and 10 parts of modifier suspension, raise the temperature to 78-85°C, and add 70 parts of pre-emulsion and 70 parts of modifier dropwise at 0.2 kg / hour The mixed solution of the modifier suspension, after dropping, add 10 parts of the modifier suspension dropwise at a rate of...

Embodiment 2

[0039] 1. Preparation of nano-inorganic modified acrylic emulsion:

[0040] a) Take 28 parts of butyl acrylate, 15 parts of methyl methacrylate, 24 parts of styrene, 3 parts of acrylic acid, 1 part of compound emulsifier of sodium lauryl sulfate and alkylphenol polyoxyethylene ether, 2 parts Sodium bicarbonate, 2 parts of N-methylolacrylamide, and 90 parts of water were mixed and stirred at room temperature for 1.5 hours to form a pre-emulsion.

[0041] b) 1.5 parts of ammonium persulfate and 5 parts of nano silicon oxide were added to 30 parts of water, and mixed and stirred for 1 hour at room temperature to form a modifier suspension.

[0042] c) While stirring at room temperature, mix 10 parts of pre-emulsion and 20 parts of modifier suspension, raise the temperature to 78-85°C, and drop 90 parts of pre-emulsion and 50 parts of The mixed solution of the modifier suspension, after dropping, add 20 parts of the modifier suspension dropwise at a rate of 0.2 kg / hour, and then ...

Embodiment 3

[0046] 1. Preparation of nano-inorganic modified acrylic emulsion:

[0047]a) Take 25 parts of butyl acrylate, 13 parts of methyl methacrylate, 22 parts of styrene, 3 parts of acrylic acid, 1 part of compound emulsifier of sodium lauryl sulfate and alkylphenol polyoxyethylene ether, 1.2 parts Sodium bicarbonate, 4 parts of N-methylolacrylamide, and 85 parts of water were mixed and stirred at room temperature for 2 hours to form a pre-emulsion.

[0048] b) Add 1.5 parts of ammonium persulfate and 10 parts of zirconium sol into 30 parts of water, and mix and stir for 1 hour at room temperature to form a modifier suspension.

[0049] c) While stirring at room temperature, mix 10 parts of pre-emulsion and 30 parts of modifier suspension, raise the temperature to 78-85°C, and add 90 parts of pre-emulsion and 70 parts of modifier dropwise at 0.3 kg / hour The mixed solution of the modifier suspension, after dropping, add 30 parts of the modifier suspension dropwise at a rate of 0.3 k...

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Abstract

The invention discloses an environment-friendly heat-proof acrylic resin insulating coating, comprising nm inorganic modified acrylic acid latex, nm acrylic acid resin, inorganic filler, curing agent, wherein the weight ratio of nm inorganic modified acrylic acid latex, nm acrylic acid resin, inorganic filler and curing agent is 10-40:20-40:20-40:5-15. The coating has no chromate and the adhesive force thereof can be 1 lever, and the interface resistance is above 800 omega.mm2, with excellent waterproof and antirust property. The coating does not come off after annealing at 750 degree with good interface resistance and corrosion resistance.

Description

technical field [0001] The invention belongs to an environment-friendly heat-resistant coating, in particular to a nano-modified acrylic resin environment-friendly insulating coating used for electrical steel coating. Background technique [0002] So far, there have been many technologies and coating formulations for forming an insulating layer on electrical steel sheets, mainly including inorganic, organic and semi-inorganic. The earliest coatings were mainly chromates and phosphates to form an inorganic film on electrical steel sheets. Although the inorganic film is excellent in heat resistance, it is poor in water resistance, impact resistance, and adhesion. In order to solve the above problems, mixed coatings containing two main components, organic and inorganic, have been gradually developed to obtain semi-inorganic coatings. This type of formulation makes full use of the good welding performance and heat resistance of the inorganic film and the excellent water resista...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/00C09D5/18
Inventor 朱涛孔祥华裴陈新张东升沈新玉徐金梧骆小刚何业东董梅胡柯占云高朱文清
Owner MAANSHAN IRON & STEEL CO LTD
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