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Preparing method for cathodic-electrophoretic-coating photoinitiator

A cathodic electrophoretic coating and photoinitiator technology, applied in the direction of electrophoretic coatings, methods based on microorganisms, biochemical equipment and methods, etc., can solve problems such as poor adhesion and corrosion resistance of paint films, aging, and reduced Coulombic efficiency , to achieve the effects of good adhesion and corrosion resistance, improved aging resistance, and simple preparation steps

Inactive Publication Date: 2016-10-12
高大元
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention: for small molecular photoinitiators, they are easy to volatilize, remain and migrate during storage and use, resulting in yellowing and aging of the paint film, reduced Coulombic efficiency, and poor adhesion and corrosion resistance of the paint film. The disadvantages of deterioration provide a method of processing shellac resin powder using the mold that grows naturally on the pericarp to degrade the anthraquinones with large molecules into small molecules, and then use the mixed grape fermentation liquid to dissolve them. After concentration, Compound embedding with β-cyclodextrin to form a cathodic electrophoretic coating photoinitiator with both hydrophilic and lipophilic properties, so as to improve its solubility and stability after use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0017] First, weigh 20g of orange peel and 10g of grape skin in sequence, add them to a petri dish filled with 5mL of deionized water, and then place it in a damp and dark place. After 5 days of natural mold, rinse the surface of the petri dish with 30mL of deionized water. Obtain the mycelia suspension and set it aside; then use a tissue grinder to crush 30g of grapes into 0.2cm fragments, transfer it to a fermenter filled with 100mL of deionized water, add 3g of Saccharomyces cerevisiae powder to it, and use a glass rod to After stirring for 3 minutes, seal and ferment for 6 days, filter and remove the filter residue after fermentation to obtain grape fermentation liquid; then weigh 200g of shellac resin, spread it evenly on a stone mill for grinding, sieve, and sieve out 80 mesh shellac resin powder, and then add it into the airtight container containing 35mL of the above standby mycelia suspension and 10mL of the grape fermentation liquid obtained above, start the agitator,...

example 2

[0020] First, weigh 25g of orange peel and 13g of grape skin in sequence, add them to a petri dish filled with 8mL of deionized water, then place it in a damp and dark place, and after 6 days of natural mold, rinse the surface of the petri dish with 40mL of deionized water. Obtain the mycelia suspension, and set aside; Then 40g grapes are crushed into 0.4cm fragments with a tissue grinder, which is transferred to a fermenter filled with 130mL deionized water, and 4g Saccharomyces cerevisiae powder is added thereto, and the After stirring for 4 minutes, seal and ferment for 7 days, filter and remove the filter residue after fermentation to obtain grape fermentation liquid; then weigh 250g of shellac resin, spread it evenly on a stone mill for grinding, sieve, and sieve out 90 mesh shellac resin powder, and then add it to the airtight container containing 38mL of the above standby mycelia suspension and 15mL of the grape fermentation liquid obtained above, start the agitator, adj...

example 3

[0023] First, weigh 30g of orange peel and 15g of grape skin in sequence, add them to a petri dish filled with 10mL of deionized water, place it in a damp and dark place, and after 7 days of natural mold, rinse the surface of the petri dish with 50mL of deionized water. Obtain the mycelia suspension and set it aside; then use a tissue grinder to crush 50g of grapes into 0.6cm fragments, transfer it to a fermenter filled with 160mL of deionized water, add 5g of Saccharomyces cerevisiae powder to it, and use a glass rod to After stirring for 5 minutes, seal and ferment for 8 days, filter and remove the filter residue after fermentation to obtain grape fermentation liquid; then weigh 300g of shellac resin, spread it evenly on a stone mill for grinding, sieve, and sieve out 100 mesh shellac resin powder, and then add it into the airtight container containing 40mL of the above standby mycelia suspension and 20mL of the grape fermentation liquid obtained above, start the agitator, ad...

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Abstract

The invention discloses a preparing method for a cathodic-electrophoretic-coating photoinitiator, and belongs to the technical field of photoinitiator preparing. The preparing method includes the steps that shellac resin powder is treated through natural-growth mildew of fruit peel, macromolecular anthraquinone substances are degraded into micromolecules, and the micromolecules are dissolved through mixed grape fermentation liquid, the product is concentrated, the concentrated product and beta-cyclodextrin are compounded and embedded, and the cathodic-electrophoretic-coating photoinitiator with hydrophily and lipophilicity is obtained. The preparing method has the advantages that the preparing steps are simple, the obtained product is free of volatilization, residues and migration in the preserving and using processes, a paint film is good in gloss, and the aging resistance is improved by 32% or above; the coulombic efficiency of the paint film is improved by 25% to 28%, and adhesive capacity and corrosion resistance are good.

Description

technical field [0001] The invention relates to a method for preparing a photoinitiator for cathodic electrophoretic paint, and belongs to the technical field of photoinitiator preparation. Background technique [0002] Electrophoretic coatings are widely used in the coating of hardware parts and home appliances because of their advantages such as uniform paint film, high hardness, good transparency, low pollution and energy saving, especially in automobile production. Anodic electrophoretic coatings have developed to a certain extent in the application field, but in comparison, cathodic electrophoretic coatings have better anti-corrosion ability, higher throwing power, insoluble coating and stable electrophoretic bath after modification or doping. characteristics, and has attracted much attention. Cathodic electrophoretic paint is a two-component, one component is a white homogeneous milky liquid, and the other component is a gray (or black) pigment slurry. Its raw materi...

Claims

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Application Information

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IPC IPC(8): C09D7/12C09D5/44C12P1/02C12R1/865
CPCC09D5/4492C12P1/02C12N1/185C12R2001/865
Inventor 高大元盛海丰许博伟
Owner 高大元
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