Matte cathode electrophoresis coating as well as preparation method and use method for same

A cathodic electrophoretic coating, matte technology, applied in the direction of electrolytic coating, electrophoretic plating, epoxy resin coating, etc., can solve the problem of matting efficiency, poor stability, coating leveling, mechanical performance reduction, and low gloss. And other issues

Active Publication Date: 2013-06-12
KEDE CHEM IND SHUNDE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, most products on the market need matting powder, matting paste (matt paste) and other materials to achieve a certain matting performance. Due to the relatively large amount of the above-mentioned fillers, the direct consequence will be the leveling and mechanical properties of the coating. It is greatly reduced, resulting in poor extinction efficiency and stability, and cannot reduce the gloss to a very low level

Method used

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  • Matte cathode electrophoresis coating as well as preparation method and use method for same
  • Matte cathode electrophoresis coating as well as preparation method and use method for same
  • Matte cathode electrophoresis coating as well as preparation method and use method for same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A preparation method of matte cathode electrophoretic paint includes the following steps:

[0036] A semi-blocked isocyanate curing agent is prepared by reacting isocyanate with a molar ratio of 1:0.8 and a blocking solvent at a temperature of 50°C for 3 hours;

[0037] Take the epoxy resin with a molar ratio of 1:0.4 and the diamine to react at 70°C for 1 hour to prepare a partially-opened epoxy resin; take a molar ratio of 1:1 with the partially-opened epoxy resin and The reaction time of polyamide at 80℃ is 2 hours to prepare a ring-opened epoxy resin; take the semi-closed isocyanate curing agent with a molar ratio of 1:0.5 and the ring-opened epoxy resin at a temperature of 80℃ React for 2 hours; generate semi-blocked isocyanate grafted amine-modified epoxy resin, which is the host resin.

[0038] Take the low-molecular-weight epoxy resin with a molar ratio of 1:0.5 and bisphenol A to react for 2 hours at a reaction temperature of 110°C, and carry out a chain extension re...

Embodiment 2

[0056] A preparation method of matte cathode electrophoretic paint includes the following steps:

[0057] A semi-blocked isocyanate curing agent is prepared by reacting isocyanate with a molar ratio of 1:1.5 and a blocking solvent at a temperature of 70°C for 5 hours;

[0058] Take the epoxy resin with a molar ratio of 1:0.8 and the diamine to react at 80°C for 2 hours to prepare a partially-opened epoxy resin; take a molar ratio of 1:1.5 with the partially-opened epoxy resin and The reaction time of polyamide at 90℃ is 3 hours to prepare a ring-opened epoxy resin; take the semi-closed isocyanate curing agent with a molar ratio of 1:1.0 and the ring-opened epoxy resin at a temperature of 90℃ React for 3 hours; generate semi-blocked isocyanate grafted amine-modified epoxy resin, namely host resin.

[0059] Take the low-molecular-weight epoxy resin with a molar ratio of 1:1.0 and bisphenol A to react for 3 hours at a reaction temperature of 120°C, and carry out chain extension reactio...

Embodiment 3

[0070] A preparation method of matte cathode electrophoretic paint includes the following steps:

[0071] (1) Preparation of semi-blocked isocyanate curing agent

[0072] A semi-blocked isocyanate curing agent is prepared by reacting isocyanate with a molar ratio of 1:1 and a blocking solvent at a temperature of 60°C for 4 hours;

[0073] (2) Preparation of main resin

[0074] (1) Take the epoxy resin and diamine with a molar ratio of 1:0.6 to react for 1.5 hours at 75°C to prepare a partially ring-opened epoxy resin;

[0075] (2) A ring-opened epoxy resin is prepared by taking a partially ring-opened epoxy resin with a molar ratio of 1:1.3 and a polyamide at 85°C for a reaction time of 2.5 hours;

[0076] (3) Take the semi-blocked isocyanate curing agent with a molar ratio of 1:0.7 and react with the ring-opening epoxy resin for 2.4 hours at a temperature of 85°C; the semi-blocked isocyanate grafted amine-modified epoxy resin is produced, namely Main body resin.

[0077] (3) Preparation...

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Abstract

The invention discloses a matte cathode electrophoresis coating, comprising a matte cathode electrophoresis coating emulsion and a colour paste which are independently stored, wherein the matte cathode electrophoresis coating emulsion comprises 40-50 parts of matrix resin, 0.5-1 parts of alcohol ether cosolvent, 3-5 parts of organic acid, 0.3-0.6 parts of emulsifier, 40-50 parts of deionized water, and 0.5-1 parts of acid; the colour paste comprises 20-30 parts of matrix resin, 5-10 parts of alcohol ether cosolvent, 3-8 parts of organic acid, 0.3-0.7 parts of alkyne diol emulsifier, 30-40 parts of deionized water, 15-20 parts of filler, 3-8 parts of microgel resin, and 5-9 parts of extinction powder; and during the use of the matte cathode electrophoresis coating, the colour paste and the matte cathode electrophoresis coating emulsion are mixed in a ratio of 1: (2 to 3), and then deionized water having the same amount with the mixed solution of the colour paste and the matte cathode electrophoresis coating emulsion is added. By using the coating for coating, a coating film which is excellent in smoothness, uniform in extinction, good in drug tolerance and constructability, and the like can be obtained.

Description

Technical field [0001] The invention relates to an electrophoretic coating, in particular to a matte cathode electrophoretic coating, and a preparation method and use method thereof. Background technique [0002] Matte cathodic electrophoretic coatings are widely used in automobile and motorcycle accessories, home appliances, hardware and electromechanical industries; the surface of the matte coating can cover minor paint film defects and make the appearance uniform, and is welcomed by coating manufacturers. Paint film feel and low gloss are the main indicators for evaluating the properties of matte cathodic electrophoretic coatings. [0003] Cathodic electrophoretic coating film must achieve a certain matting effect, it must cause diffuse reflection of light on the surface of the paint film, otherwise the matting effect is not good. Therefore, most products on the market need to use matting powder, matting paste (matt paste) and other materials to achieve a certain matting perfor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D163/00C09D7/12C09D17/00C08G18/80C08G18/58C08G59/60C25D13/06
Inventor 李文庄高睿何愿文陈立志黄小勇梁立南
Owner KEDE CHEM IND SHUNDE
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