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Preparation method of water-soluble low-contact-angle half-inorganic silicon sheet varnish

A silicon steel sheet paint and contact angle technology, applied in polyester coatings, coatings, etc., can solve the problems of low dispersion of paint liquid powder, low volume resistance of paint film, thickened edges, etc., to achieve good toughness and reduce VOC. Displacement, the effect of reducing the contact angle

Inactive Publication Date: 2013-11-27
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problems of low dispersion of paint liquid powder and large contact angle in the existing silicon steel sheet paint preparation method, which lead to edge thickening, edge shrinkage, orange peel, Shrinkage, the problem of low volume resistance of the paint film, provide a preparation method for water-soluble low contact angle semi-inorganic silicon steel sheet paint

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0013] Specific embodiment 1: The preparation method of the water-soluble low-contact-angle semi-inorganic silicon steel sheet paint of this embodiment is carried out in the following steps:

[0014] 1. Add dibasic acid, dihydric alcohol and trihydric alcohol into the reactor with condensing reflux device, and raise the temperature to 100~150℃. After the solid matter in the reaction system is dissolved, add the catalyst, start stirring, and continue to heat up. The temperature of the reaction system reaches 160~170℃, and the temperature is kept for 0.5~2h; 2. Then the temperature of the reaction system is reduced to 100~150℃, the reflux device of the reaction kettle is changed to a recovery unit, and then the temperature is 0.5℃ / min~1℃ / The temperature of the reaction system is increased to 160~180℃ and kept for 0.5~2h at the rate of min. 3. Then the temperature of the reaction system is increased by 10~20℃, kept for 0.5~2h, and the temperature continues to increase by 10~20℃, kee...

specific Embodiment approach 2

[0017] Specific embodiment two: this embodiment is different from specific embodiment one in that the dibasic acid in step one is one of dimethyl terephthalate, phthalic anhydride, isophthalic acid and adipic acid. Species or a mixture of several of them. Others are the same as the first embodiment.

[0018] When the dibasic acid is a mixture, the various components can be mixed in any ratio.

specific Embodiment approach 3

[0019] Specific embodiment three: This embodiment is different from specific embodiment one or two in that: the diol in step one is one or several of ethylene glycol, neopentyl glycol, and diethylene glycol mixture. Others are the same as the first or second embodiment.

[0020] When the diol is a mixture, the various components can be mixed at any ratio.

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Abstract

The invention relates to a preparation method of silicon sheet varnish, particularly a preparation method of water-soluble low-contact-angle half-inorganic silicon sheet varnish. The invention aims to solve the problems of low dispersity and large contact angle of paint liquid powder, and the problem of low volume resistance of the paint film in the existing silicon sheet varnish preparation method. The method comprises the following steps: adding dibasic acid, dibasic alcohol and tribasic alcohol into a reaction kettle; after heating, adding a catalyst, heating and keeping the temperature; cooling the reaction system, heating and keeping the temperature; heating the reaction system three times, cooling, adding polybasic acid, and keeping the temperature; cooling to room temperature, and adding long-chain curing agent, neutralizer and cosolvent to obtain an organic phase; adding the organic phase, short-chain curing agent, inorganic phase and assistant into an ultrasonic reaction kettle; and carrying out ultrasonic dispersion, and discharging to obtain the half-inorganic silicon sheet varnish. The invention enhances the dispersity of the inorganic phase, and reduces the contact angle of the paint liquid, so that the applied paint film is smoother. The invention is applied to preparation of silicon sheet varnish.

Description

Technical field [0001] The invention relates to a preparation method of silicon steel sheet paint. Background technique [0002] Polyester resin is a polymer compound formed by the condensation polymerization of polybasic acid and polyol. Polyester resin paint has a long history and many varieties, but its development has not stalled. Because polyester resin paint has the advantages of numerous raw materials, great modification potential, simple process, and extremely wide use, it has always maintained a relatively strong vitality. [0003] Ordinary polyester resins are insoluble in water, but only soluble in organic solvents such as acetone, methanol, and ethanol, while polyester resins must be applied in the form of solutions. Organic solvents have the disadvantages of being flammable, explosive, expensive, and difficult to recycle. In addition, the solvent volatilizes during curing and molding, causing environmental pollution and public hazards. In the existing preparation me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D167/02C09D7/12C08G63/20C08G63/672
Inventor 刘立柱张笑瑞翁凌王鹏跃李子帙朱兴松
Owner HARBIN UNIV OF SCI & TECH