A high fullness waterborne acrylic polyurethane coating composition comprising waterborne hydroxyacrylic dispersion resin and preparation method thereof

A technology of acrylic polyurethane and hydroxyacrylic acid, applied in polyurea/polyurethane coatings, coatings, etc., can solve problems such as poor water resistance, high content of hydrophilic groups, and poor environmental protection

Active Publication Date: 2021-01-29
江门市邦德涂料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to ensure the water solubility of the resin, the content of acid monomers such as acrylic acid is relatively high (8 parts, 67 parts in total, accounting for 11.9wt%), and the grafted hydrophobic monomer glycidyl tert-carbonate is less (4 parts, 67 parts of total components, accounting for 6.0wt%), therefore, it can be deduced that the resin acid value obtained is 79.56mgKOH / g (acid value=(acrylic acid content / 72.06-tertiary carbonic acid glycidyl ester content / 250)*56100=79.56mgKOH / g), the high acid value makes the resulting resin need to be used with a more toxic aziridine crosslinking agent, which is not environmentally friendly, and after film formation, the content of hydrophilic groups is high and water resistance The performance is relatively poor, and it is difficult to meet the application requirements of high-end industrial fields

Method used

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  • A high fullness waterborne acrylic polyurethane coating composition comprising waterborne hydroxyacrylic dispersion resin and preparation method thereof
  • A high fullness waterborne acrylic polyurethane coating composition comprising waterborne hydroxyacrylic dispersion resin and preparation method thereof
  • A high fullness waterborne acrylic polyurethane coating composition comprising waterborne hydroxyacrylic dispersion resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0092] A waterborne hydroxyacrylic acid dispersion resin is prepared by the following method:

[0093] Add 300 parts of trimethylbenzene and 300 parts of ethylene glycol monobutyl ether into the reaction kettle at one time, stir evenly, raise the temperature to 145°C and keep it warm; under the condition of stirring, add the previous monomers dropwise at a uniform speed, including: 800 parts of methyl methacrylate , 120 parts of methacrylic acid, 620 parts of hydroxyethyl methacrylate, 450 parts of n-butyl acrylate and 200 parts of isooctyl methacrylate, and 50 parts of VAZO 67 initiator were added, and the addition was completed within two hours; 145°C After half an hour of heat preservation reaction, add the latter monomer dropwise, including: 300 parts of methyl methacrylate, 400 parts of styrene, 40 parts of methacrylic acid, 300 parts of hydroxyethyl methacrylate, 600 parts of n-butyl methacrylate and 200 parts of isooctyl methacrylate, and added 50 parts of VAZO 67 initi...

Embodiment 2

[0101] The preparation method of water-based hydroxyacrylic acid dispersion resin and ultra-high solid content hydroxyacrylic resin is the same as that of Example 1.

[0102] A high-fullness waterborne acrylic polyurethane coating composition, prepared by the following method:

[0103] 1) Mix 25 parts of ultra-high solid hydroxyl acrylic resin, 1 part of water-based wetting agent, 0.5 parts of water-based defoamer, 1 part of water-based aging agent and 2.5 parts of film-forming aid, and use a disperser to stir evenly until it is transparent and clear ; Gradually add 60 parts of water-based hydroxyacrylic acid dispersion resin under stirring condition, add 10 parts of deionized water after stirring evenly, obtain A component, solid content is 50.2wt%, viscosity is 350mPa·S;

[0104] 2) Mix 10 parts of propylene glycol methyl ether acetate, 20 parts of propylene glycol diacetate and 0.5 part of Additive OF, stir for 30 minutes, continue to slowly add 50 parts of Bayhydur XP 2655...

Embodiment 3

[0107] The preparation method of water-based hydroxyacrylic acid dispersion resin and ultra-high solid content hydroxyacrylic resin is the same as that of Example 1.

[0108] A high-fullness waterborne acrylic polyurethane coating composition, prepared by the following method:

[0109] 1) Mix 10 parts of ultra-high solid hydroxyl acrylic resin, 0.5 parts of water-based wetting agent, 0.8 parts of water-based defoamer, 1.5 parts of water-based aging agent and 2 parts of film-forming aid, and use a disperser to stir evenly until it is transparent and clear ; Gradually add 70 parts of water-based hydroxyacrylic acid dispersion resin under stirring condition, add 15 parts of deionized water after stirring evenly, obtain A component, solid content is 46.8wt%, viscosity is 320mPa·S;

[0110] 2) Mix 15 parts of propylene glycol methyl ether acetate, 10 parts of propylene glycol diacetate, 10 parts of dipropylene glycol dimethyl ether and 0.3 parts of Additive OF, stir for 30 minutes,...

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Abstract

The invention discloses a high-fullness waterborne acrylic polyurethane coating composition comprising a waterborne hydroxyl acrylic dispersion resin and a preparation method thereof. The high-fullness waterborne acrylic polyurethane coating composition includes A component and B component, and the A component includes Raw materials in the following parts by weight: 50-70 parts of water-based hydroxyacrylic dispersion resin, 10-30 parts of ultra-high solid hydroxyacrylic resin, 1-5 parts of auxiliary agent and 10-20 parts of deionized water; component B includes the following Raw materials in parts by weight: 60-80 parts of water-dispersible polyisocyanate polymer, 0.2-0.5 parts of dehydrating agent and 20-40 parts of film-forming aid, the mass ratio of A component and B component is 2-4:1 . The method can effectively improve the solid content of the water-based polyurethane coating and the fullness of the paint film, is simple to prepare, and can be widely used in the environmental protection coating of fields such as construction machinery, rail transit vehicles, and large and medium-sized buses.

Description

technical field [0001] The invention belongs to the field of polyurethane coatings, and in particular relates to a waterborne hydroxyacrylic acid dispersion resin and a preparation method thereof, a high-fullness waterborne acrylic polyurethane coating composition comprising the waterborne hydroxyacrylic acid dispersion resin and a preparation method thereof. Background technique [0002] Waterborne acrylic polyurethane coating is a kind of green and environment-friendly coating, which can replace the traditional solvent-based acrylic polyurethane coating, and is widely used in the coating of construction machinery, rail transit vehicles and large and medium-sized buses. In the prior art, patents CN 103773210 A and CN 105131821 A propose water-based acrylic polyurethane coatings and preparation methods thereof. Among them, in the method disclosed by CN 103773210 A, a single polyol aqueous dispersion or aqueous emulsion is used as the core film-forming material, and isophoron...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/14C08F220/20C08F220/06C08F220/18C08F212/08C09D175/04C08G18/62
CPCC08F220/14C08F220/20C08G18/6229C09D175/04C08F220/06C08F220/1804C08F220/1808C08F212/08
Inventor 李游
Owner 江门市邦德涂料有限公司
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