Primer-topcoat acrylic resin coating and preparation method thereof

A technology of acrylic resin and coating, which is applied in the direction of anti-corrosion coating, polyurea/polyurethane coating, coating, etc. It can solve the problems that customers cannot bear, long construction line, and high humidity requirement in water-based coating construction environment, so as to reduce the pressure of investment Effect

Active Publication Date: 2020-06-16
NIPPON PAINT IND COATINGS SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Coating operation is an important part of construction machinery production. At present, two coating systems of anti-corrosion primer and polyurethane topcoat are generally used for matching. This matching method has long construction lines, large workshop area, and many construction workers. Disadvantages. In addition, with the country's emphasis on the environment and the introduction of various environmental protection regulations, it is increasingly difficult for traditional solvent-based coatings to meet customer requirements because of the large amount of volatile organic compounds emitted during the construction process. Require
[0003] At present, the traditional solvent-based coatings used in the surface coating of construction machinery generally have a solid content of less than 60%. During construction, it is necessary to add

Method used

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  • Primer-topcoat acrylic resin coating and preparation method thereof
  • Primer-topcoat acrylic resin coating and preparation method thereof
  • Primer-topcoat acrylic resin coating and preparation method thereof

Examples

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preparation example Construction

[0035] The present invention also provides a preparation method of the acrylic resin coating with the above-mentioned bottom surface integrated, comprising:

[0036] S1: Mix 50-70 parts of acrylic resin, 2-4 parts of dispersant, 1-2 parts of dispersing aid, and 5-11 parts of solvent, stir at 400-600 rpm for 10-15 minutes; then add 20-40 parts of pigment Filler, stir at 600-800rpm for 10-15min; continue to add 1-4 parts of solvent and stir until uniformly mixed, use a sand mill to grind to a suitable fineness; add 0.1-4 parts of other additives, stir until uniformly mixed to obtain Group A Minute;

[0037] S2: Mix 65-75 parts of hexamethylene diisocyanate, 25-35 parts of butyl acetate and 0.1-0.5 parts of water-absorbing agent to obtain component B;

[0038] S3: Mix component A and component B uniformly according to the weight ratio of 5-7:1 to obtain an acrylic resin coating with bottom and surface integrated.

[0039] In the preparation process, the organic solvent is added...

Embodiment 1

[0047] Preparation of yellow base-surface-in-one acrylic paint

[0048] S1: Add 58kg of acrylic resin, 5.2kg of propylene glycol methyl ether acetate, 5.2kg of methyl isobutyl ketone, 2kg of dispersant, and 1kg of dispersing aid into a suitable container, and stir (400-600rpm) for 10-15 minutes;

[0049] Add 9.4kg of yellow pigment and 14.5kg of anti-rust pigment while stirring. After adding, stir (600-800rpm) for 10-15 minutes;

[0050] Add 1.8kg propylene glycol methyl ether acetate along the container wall while stirring, and continue to stir for 15 minutes until uniform; start grinding and dispersing on the designated sand mill until the fineness meets the requirements;

[0051] During stirring (400-600rpm), add 2kg of silane coupling agent, 0.5kg of leveling agent, and 0.4kg of drier, and then stir (400-600rpm) for 15 minutes until completely uniform to obtain component A.

[0052] S2: 70kg of hexamethylene diisocyanate, 29.5kg of butyl acetate and 0.5kg of water-absorbi...

Embodiment 2-3

[0056] The raw material composition table of the coating prepared in Example 2-3 is shown in Table 1, and its preparation process is basically the same as that of Example 1.

[0057] The molecular weight of the E-10 modified acrylic resin in Example 2-3 is 1800, the solid content is 75%, the viscosity is 6 Pa.S, and the hydroxyl value is 120 mgKOH / g.

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Abstract

The invention discloses a primer-topcoat acrylic resin coating. The primer-topcoat acrylic resin coating comprises a component A and a component B in a weight ratio of (5-7):1, wherein the component Acomprises the components in parts by weight: 50-70 parts of acrylic resin, 2-4 parts of a dispersing agent, 1-2 parts of a dispersing aid, 20-40 parts of a pigment filler, 0.1-4 parts of other aids and 5-15 parts of a solvent; the component B comprises the components in parts by weight: 65-75 parts of hexamethylene diisocyanate, 25-35 parts of butyl acetate and 0.1-0.5 part of a water absorbent.According to the coating, glycidyl tertiary carbonate modified acrylic resin with specific solid content, viscosity, hydroxyl value and molecular weight of 1600-2000 is used as matrix resin, and hexamethylene diisocyanate and an antirust pigment are matched, so that weather resistance, appearance requirements, hardness, flexibility and the like are met, and low VOC is realized. Meanwhile, one spraying procedure can be omitted in the construction process of the primer-topcoat coating, and no special requirement is needed for construction equipment.

Description

technical field [0001] The invention relates to the technical field of coatings. More specifically, it relates to an acrylic resin coating with integrated bottom and surface and a preparation method thereof. Background technique [0002] The construction machinery industry is the foundation of the development of the national economy. In recent years, with the country's continuous investment in infrastructure, the construction machinery industry has also developed by leaps and bounds. Coating operation is an important part of construction machinery production. At present, two coating systems of anti-corrosion primer and polyurethane topcoat are generally used for matching. This matching method has long construction lines, large workshop area, and many construction workers. Disadvantages. In addition, with the country's emphasis on the environment and the introduction of various environmental protection regulations, it is increasingly difficult for traditional solvent-based c...

Claims

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Application Information

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IPC IPC(8): C09D133/04C09D7/63C09D5/08C09D175/04C08G18/62
CPCC08G18/6225C08K2003/327C09D5/08C09D133/04C09D175/04C09D7/63C08K13/06C08K9/02C08K3/32C08K5/29C08K5/54
Inventor 肖华陈浦
Owner NIPPON PAINT IND COATINGS SHANGHAI
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