Scratch-resistant waterborne UV curing coating and preparation method thereof

A curing coating, scratch-resistant technology, applied in the coating field, can solve the problems of poor water resistance, scratch resistance, low adhesion of water-based UV coatings, etc.

Active Publication Date: 2016-06-15
JIAXING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, water-based UV coatings also have disadvantages such as low adhesion, scratch resistance, and poor water resistance.

Method used

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  • Scratch-resistant waterborne UV curing coating and preparation method thereof

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Embodiment

[0016] Step 1: Add 82ml of ethanol and 13g of aluminum nitrate nonahydrate into a 250ml beaker at room temperature, stir magnetically until completely dissolved, then add 13ml of propylene oxide, seal with a plastic film, and stir for 5 minutes to form a viscous transparent sol, weight About 78g.

[0017] The second step: Put the sol obtained in the first step into the barrel, start stirring, and at a speed of 400-600r / min, add 4.5g of vinyltriethoxysilane, 25g of water, aliphatic water-based polyurethane acrylate (solid Content 95%) 85g, 2-hydroxy-4'-(2-hydroxyethoxy)-2-methylpropiophenone 5g, sebacic acid bis(1,2,2,6,6-pentamethylpiperidine Alcohol) ester 4.5 grams. Keep the rotation speed of 400-600r / min to disperse for 30min, and then use an emulsifier to disperse at 3000-4000r / min for 10min to obtain the coating. The whole process is protected from light.

[0018] Above-mentioned coating is coated on paper and leather surface (roller coating, coating amount 8-10g / m 2 )...

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Abstract

The invention discloses a scratch-resistant waterborne UV curing coating which is prepared from, by weight, 40-45 parts of aliphatic waterborne polyurethane acrylate, 2-2.5 parts of vinyltriethoxysilane, 38-40 parts of alumina sol, 2-3 parts of 2-hydroxy-4'-(2-hydroxyethoxy)-2-methylpropiophenone, 2-2.5 parts of bis(1,2,2,6,6-pentamethyl-4-piperidyl) sebacate and 10-15 parts of water. The water-soluble aliphatic polyurethane acrylate is used as the main material, the vinyltriethoxysilane is used as a modifying additive, and the water-soluble aliphatic polyurethane acrylate and the vinyltriethoxysilane are mixed with the alumina sol to prepare the organic-inorganic hybrid coating. The surface of paper or leather is coated with the coating, after UV curing, Si-O-Si and Si-O-Al bonds are formed in a coating film and formed between the coating film and a base material, and therefore the adhesive force of the coating film for the base material and the scratch resistance of the surface of the film are improved.

Description

technical field [0001] The invention belongs to the field of coatings, in particular to a scratch-resistant water-based UV curing coating and a preparation method thereof. Background technique [0002] UV curing coatings refer to a new type of coatings that can be rapidly cross-linked and cured to form a film under ultraviolet light irradiation. It has the advantages of no or low VOC emission, energy saving, fast curing rate, high production efficiency, suitable for assembly line production, low curing temperature, suitable for coating heat-sensitive or flammable substrates, etc. At present, UV curing coatings have been widely used in paper, leather, wood, metal, plastic and so on. [0003] The main component used in traditional oil-based UV-curable coatings, namely prepolymer, generally has a relatively high viscosity. Organic solvents, reactive diluents or reactive monomers must be added to adjust the viscosity and improve its rheology when coating. Most of these organic...

Claims

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Application Information

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IPC IPC(8): C09D175/14C09D7/12
CPCC08K3/22C08K5/132C08K5/3435C08K2003/2227C09D7/61C09D7/63C09D175/14
Inventor 王玲汪蔚孟晨洁许汝南邵文君
Owner JIAXING UNIV
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