Paint used for coiled metal material

A technology for metal coils and coatings, applied in the field of back paint, top coat, and primer for metal coils, it can solve the problems of heavy smoke, chemical resistance, water resistance, stain resistance, corrosion resistance and friction resistance, High energy consumption and other issues, to achieve excellent flexibility and hardness, excellent chemical resistance, and reduce energy consumption

Active Publication Date: 2012-12-05
ZHEJIANG TRANSFER PAINT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If there is no excellent catalytic cracking and incineration during the coating and baking process of this coil coating, large smoke will be generated, polluting the production area and the surrounding environment, and the coating formulated with this polyester resin

Method used

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  • Paint used for coiled metal material
  • Paint used for coiled metal material
  • Paint used for coiled metal material

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0029] Examples 1-4 are the preparation methods of saturated polyester resin.

[0030] Examples 5-6 are preparation methods of epoxy-modified saturated polyester resin.

Example Embodiment

[0031] Example 1

[0032] Add 127 g of xylene into a four-necked flask equipped with a vertical condenser, a mechanical stirrer, a thermometer and a constant pressure dropping funnel. Add 370g styrene, 88.5g allyl alcohol, 10.3g di-tert-butyl peroxide premixed monomer into the constant pressure dropping funnel, heat the xylene to 135℃ under stirring, and add about 95g premixed monomer first After reacting until the reflux slows down, then start to add the premixed monomer dropwise. The addition takes 2-3 hours. Close the constant pressure dropping funnel. The maximum reaction temperature is 145°C. After the reaction is kept warm for 1 hour, take a sample for measurement. The monomer conversion rate reaches 98% or more, the temperature is reduced to no reflux, the oil-water separator is replaced, and 69.2g adipic acid is added, the temperature is raised to 180-200℃, the temperature is kept and the acid value is less than 8mgKOH / g, and the flow is removed under vacuum. Until there...

Example Embodiment

[0040] Example 2

[0041] 100g of xylene was put into a four-necked flask equipped with a vertical condenser, a mechanical stirrer, a thermometer and a constant pressure dropping funnel, 379g of styrene, 60.5g of allyl alcohol, 60.5g of hydroxyethyl acrylate, 10.5g The pre-mixed monomer of di-tert-butyl oxide is added to the constant pressure dropping funnel, the xylene is heated to 135°C under stirring, and about 100 g of the above-mentioned pre-mixed monomer is added first, and the reaction is until the reflux slows down, and the pre-mixing is started. The monomer is added dropwise in 2-3 hours. The constant pressure dropping funnel is closed. The maximum reaction temperature is 145°C. After the reaction is kept for 1 hour, the monomer conversion rate is over 98% measured by sampling, and the temperature is reduced to no reflux. Install the oil-water separator, add 50.8g adipic acid, heat up to 180~200℃, keep the temperature and esterify until the acid value is less than 8mgKOH...

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Abstract

The invention discloses a paint used for a coiled metal material. The existing paint prepared by polyester resin has the disadvantages that the curing process needs high plate temperature, the energy consumption is high, the paint film is soft, and the scratch resistance, the chemical product resistance, the water resistance, the soiling resistance, the corrosion resistance and the friction resistance are poor. The paint used for the coiled metal material disclosed by the invention comprises the following components by weight percent: 40-55% of saturated polyester resin or epoxy modified saturated polyester resin, 15-35% of pigment, 0-10% of filler, 0-0.1% of de-foaming agent, 0.2-1.0% of wetting dispersant, 0-1.0% of flatting agent, 2-10% of ester solvent, 2-10% of aromatic hydrocarbon solvent, 2-15% of crosslinking agent, 0.1-1.0% of baked paint cooling catalyst, 0-1.5% of extinction powder, and 0.1-0.2% of wax powder. The paint disclosed by the invention has low curing temperature and high curing speed; and the painted film has excellent roughness and rigidity.

Description

technical field [0001] The present invention relates to metal coil coatings for construction, containers, metal furniture, household appliances, industrial packaging, in particular primers, backcoats and topcoats for metal coils. Background technique [0002] The compositions of many coil coatings are well known to those skilled in the art, yet as the core part of the composition of coil coatings, i.e. polyester resin, its synthesis approach all starts with dibasic alcohols, tribasic alcohols or The mixture of the two, and the mixture of dicarboxylic acid or tricarboxylic acid or the anhydride of the two, is esterified into polyester resin through long-term high temperature and under the action of a catalyst. For example, the international application of Dow Global Technologies: PCT / US2008 / 052296, China Application No. 200880003471.0 Under the action of phosphorous acid or toluene sulfonic acid, the saturated polyester resin is synthesized by esterification at 140-260 ° C, u...

Claims

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Application Information

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IPC IPC(8): C09D167/00C08G63/20C08G63/91C08G63/78C08F212/08C08F220/14C08F220/28C08F220/06
Inventor 钱炳江施建权吴勇胡娟陈萍
Owner ZHEJIANG TRANSFER PAINT CO LTD
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