Aqueous coiled material over-printing vanish and preparation method thereof

A technology for covering varnishes and coils, applied in coatings, epoxy resin coatings, etc., can solve the problems that need to be further improved, and achieve the effects of good gloss and color retention, clarity and transparency, and fullness of the coating film.

Active Publication Date: 2018-10-09
中山创美涂料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In actual industry and daily application, common water-based varnishes for coi

Method used

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  • Aqueous coiled material over-printing vanish and preparation method thereof
  • Aqueous coiled material over-printing vanish and preparation method thereof
  • Aqueous coiled material over-printing vanish and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Preparation of epoxy-modified acrylic resin:

[0031] (1) Add 30 parts by weight of ethylene glycol monobutyl ether into the reactor and heat up to 100 ° C, dropwise add 70 parts by weight containing 11% acrylic acid, 7% methacrylic acid, 5% ethyl acrylate, 45% butyl acrylate, 17% E-51 epoxy resin, 10% hydroxyethyl acrylate, 5% hydroxypropyl acrylate acrylic mixed monomer, the amount added is the weight of hydroxypropyl acrylate acrylic mixed monomer A mixture of 0.3% cumene peroxide and 0.1% n-butyl mercaptan was added dropwise within 5 hours;

[0032] (2) reaction system was incubated for 2 hours, then added cumene peroxide of 0.1 parts by weight, continued to be incubated for 4 hours;

[0033] (3) Subsequently, the temperature of the reaction system is lowered to below 85°C, and the pH value is neutralized to 6.5 with ammonia water or an organic amine neutralizer, and finally an appropriate amount of water is added to adjust the solid content to 55%, that is, the ep...

Embodiment 2

[0035] Preparation of epoxy-modified acrylic resin:

[0036](1) Add 50 parts by weight of ethylene glycol monobutyl ether into the reactor and heat up to 120°C, and dropwise add 50 parts by weight of acrylic acid containing 15%, methacrylic acid of 8%, ethyl acrylate of 20%, butyl acrylate, 10% E-44 epoxy resin, 9% hydroxyethyl acrylate, 4% hydroxypropyl acrylate acrylic mixed monomer, the amount added is the weight of hydroxypropyl acrylate acrylic mixed monomer A mixture of 0.4% cumene peroxide and 0.08% n-butylmercaptan was added dropwise within 6 hours;

[0037] (2) the reaction system was incubated for 2 hours, then added 0.2 parts by weight of cumene peroxide, and continued to be incubated for 3 hours;

[0038] (3) Subsequently, the temperature of the reaction system is lowered to below 70° C., the pH value is neutralized to 6.5 with ammonia water or an organic amine neutralizer, and finally an appropriate amount of water is added to adjust the solid content to 45%.

Embodiment 3

[0040] First take each raw material according to the following raw material proportioning: Example 1 Epoxy-modified acrylic resin 40%, polyester resin 18%, 308 high methylated melamine cross-linking agent 4%, blocked alicyclic polyisocyanate curing agent 5%, propylene glycol ether 0.5%, acrylate leveling agent 0.4%, polyacrylate block copolymer dispersant 0.5%, non-organic silicon defoamer 0.5%, dimethylethanolamine 0.1%, water 31%. Then add the weighed epoxy-modified acrylic resin, polyester resin and water into the high-speed disperser to disperse and stir evenly, and finally add 308 high-etherified melamine crosslinking agent, blocked alicyclic polyisocyanate curing agent, and propylene glycol ether , acrylate leveling agent, polyacrylate block copolymer dispersant, non-organic silicon defoamer and dimethylethanolamine, set the stirring speed to 800r / min, and stir at high speed for 30 minutes to obtain a water-based coil Varnish.

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Abstract

The invention relates to aqueous coiled material over-printing vanish which comprises the following components in percentage by mass: 40-70% of an epoxy modified acrylic resin, 10-30% of a polyester resin, 4-15% of a high imino group resin, 3-6% of a sealed type isocyanate curing agent, 0.5-5% of a cosolvent, 0.2-1% of a leveling agent, 0.2-1% of a dispersant, 0.2-1% of a defoaming agent, 0.1-1% of a neutralizing agent and 10-41% of water. The invention further provides a preparation method of the aqueous coiled material over-printing vanish. The aqueous coiled material over-printing vanish provided by the invention is an environmental-friendly coating with water as a solvent together with a small amount of a cosolvent, has the advantages that 1), the vanish is not liable to combust or explode, small in volatile organic compound (VOC) emission and green and environmental-friendly; 2) the vanish is simple in production process, low in cost, good in leveling quality, good in adhesion property, xanthochromia resistance, high in solid content and low in viscosity; 3) the vanish has the characteristics of light colors, high clearness and transparency, good light and color retention andweather resistance, coating fullness and good thermal resistance; 4) the vanish is good in chemical resistance, stable with acids, alkalis, alcohols, oils and the like; 5) the vanish is good in size stability and medium permeation prevention.

Description

technical field [0001] The invention relates to the technical field of water-based coatings, in particular to a varnish for water-based coils and a preparation method thereof. Background technique [0002] Ordinary coils are generally made of metal, which has poor weather resistance and corrosion resistance. In order to enhance the weather resistance and corrosion resistance of coil products and prolong their service life, surface treatment of coil materials is usually required. Metal surface treatment technology generally includes painting, electroplating, chemical oxidation, coating technology, etc. The method of using coating technology to treat the metal surface has a long history. The most simple and effective method is to directly apply a suitable coating on the metal surface. After proper rapid high-temperature baking, after the solvent in the coating evaporates, the A dense protective film can be formed on the surface of the metal coil. [0003] At present, metal ...

Claims

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Application Information

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IPC IPC(8): C09D163/10C09D7/65C09D7/20
CPCC08L2201/10C09D163/10C09D7/20C09D7/65C08L67/00
Inventor 邓光万陈志国林秋云
Owner 中山创美涂料有限公司
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