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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 , Curing requires a higher plate temperature, 224 ~ 232 ° C, large energy consumption, and the paint film is soft, poor scratch resistance, chemical resistance, water resistance, stain resistance, corrosion resistance and friction resistance and other disadvantages

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
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preparation example Construction

[0029] Embodiment 1-4 is the preparation method of saturated polyester resin.

[0030] Embodiment 5-6 is the preparation method of epoxy modified saturated polyester resin.

Embodiment 1

[0032]Add 127g 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 of styrene, 88.5g of allyl alcohol, and 10.3g of premixed monomers of di-tert-butyl peroxide into the constant pressure dropping funnel, heat the xylene to 135°C while stirring, and first add about 95g of premixed monomers body, react until the reflux slows down, then start to add the premixed monomer dropwise, finish adding in 2-3 hours, close the constant pressure dropping funnel, the maximum reaction temperature is 145°C, and after 1 hour of heat preservation reaction, take a sample and measure When the conversion rate of the monomer reaches more than 98%, cool down to no reflux, replace the oil-water separator, and add 69.2g of adipic acid, raise the temperature to 180-200°C, keep warm for esterification until the acid value is less than 8mgKOH / g, vacuum remove and flow out until there is no effluent, co...

Embodiment 2

[0041] Add 100g xylene into a four-necked flask equipped with a vertical condenser, a mechanical stirrer, a thermometer and a constant pressure dropping funnel, add 379g styrene, 60.5g allyl alcohol, 60.5g hydroxyethyl acrylate, and 10.5g over Add the premixed monomer of di-tert-butyl oxide into the constant pressure dropping funnel, heat the xylene to 135°C under stirring, first add about 100g of the above premixed monomer, react until the reflux slows down, and start adding the premixed After the monomer is added dropwise in 2-3 hours, the constant pressure dropping funnel is closed, the maximum reaction temperature is 145°C, and after 1 hour of heat preservation reaction, the conversion rate of the monomer is measured to be above 98% by sampling, and the temperature is lowered to no reflux. Install an oil-water separator, add 50.8g of adipic acid, heat up to 180-200°C, keep warm for esterification until the acid value is less than 8mgKOH / g, remove the effluent in a vacuum un...

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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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