High-performance 150 DEG C oven dry type bi-component epoxy-polyurethane cathode electrophoretic paint

A cathodic electrophoretic coating, two-component technology, applied in the direction of polyurea/polyurethane coating, electrophoretic coating, epoxy resin coating, etc., can solve the problem of low breakdown voltage of cathodic electrophoretic paint tank solution, achieve high breakdown voltage, The effect of high thermal stability

Active Publication Date: 2009-02-18
宜春市卓越化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (2) The breakdown voltage of domestic cathodic electrophoretic paint tank solution is low, and the breakdown voltage of general thin film type is 280V-320V, even for medium thick film, it is only about 350V

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0023] The preparation method of the above-mentioned emulsion is characterized in that it includes the following steps: putting water-based cationic epoxy resin, non-toxic drier, and non-toxic solvent into dispersion tank A and dispersing at a high speed of 900-1500 rpm for 1-2 hours; Put ion water, acid and emulsifier into tank B and disperse at high speed for 10-40 minutes at 1100-1500 rpm; then slowly add the mixture in tank A to tank B at 1300-1500 rpm, and the addition is over Continue to disperse at this speed for 1-2 hours to obtain the emulsion component.

[0024] The preparation method of the above-mentioned color paste component includes the following steps: putting water-based cationic epoxy resin, pigments and fillers, non-ionic dispersant, solvent, deionized water, and drier into a dispersing pot, and dispersing at 700-1100 rpm After standing still for more than 8 hours, then disperse at 600-800 rpm for 20-40 minutes and grind in a sand mill until the fineness is ...

Embodiment 1

[0030] Put 76 parts of TDI into the reaction pot, start stirring and add 46 parts of tetrahydrofurfuryl alcohol in batches below 50°C, keep warm at 50°C for half an hour, then raise the temperature to 80°C and keep warm for 2 hours to obtain a semi-closed polyurethane curing agent.

Embodiment 2

[0032] Put 33.4 parts of acetylacetone, 55.3 parts of TDI, 1 part of dimethylethanolamine, and 80 parts of solvent butanone into the reaction pot, heat and stir, heat at 70°C for 30 minutes, then raise the temperature to 85°C for 4 hours to obtain a closed polyurethane Hardener.

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PUM

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Abstract

The invention discloses a high performance 150 DEG C dried bi-component epoxy-polyurethane cathode electrophoretic paint, which comprises aqueous cation epoxide resin, pigments and fillers, innoxious drier, dispersant, emulsifying agent, acid and so on. The thermostability and the breakdown voltage of the tank liquor involved in the invention are high; the content of working solvents is low; the tank liquor is friendly to the environment and energy-saving. The high performance 150 DEG C dried bi-component epoxy-polyurethane cathode electrophoretic paint has the excellent overall properties of salt-mist-resistance, chemical resistance, alkali resistance, and water resistance of cathode electrophoretic paint. The high performance 150 DEG C dried bi-component epoxy-polyurethane cathode electrophoretic paint can be widely applied as bottom anticorrosion painting in the metal anticorrosion industries of automobiles, components and fittings, engineering machinery, farm trucks, motorcycles, hardware, white goods and so on, which can be manufactured into transparent and chromatic cathode electrophoretic paints meeting the requirement for primer-topcoat coating of white goods, indoor hardware and so on.

Description

technical field [0001] The invention relates to the field of chemical products and preparation methods, in particular to a two-component epoxy-polyurethane cathodic electrophoretic coating. Background technique [0002] Epoxy-polyurethane two-component cathodic electrophoretic coatings are currently widely used in automotive coatings, agricultural vehicles, motorcycles, construction machinery, household appliances, hardware and other industries, and have basically replaced the anodic coating process. With the world's top large-scale coating companies such as American PPG company and German BASF company. Japan's Kansai Paint has successively established sole proprietorship or joint ventures in my country, which has greatly promoted the technological progress of domestic anodic electrophoretic coatings and coatings, but there is still a certain gap between my country's cathodic electrophoretic coating technology and the world level. Cathodic electrophoretic coatings are widel...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D5/44C09D175/04
CPCY02P20/10
Inventor江泽平
Owner宜春市卓越化工有限公司