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Bi-component polyurethane coating

A two-component polyurethane and coating technology, applied in the direction of coating, etc., can solve the problem of high proportion requirements, achieve the effect of good comprehensive performance, good flatness, and increased adhesion

Inactive Publication Date: 2015-10-21
四川珍福堂商贸有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of this, the present invention provides a two-component polyurethane coating to improve the problem that the existing two-component polyurethane coating requires too high a ratio.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] This embodiment 1 provides a two-component polyurethane coating, which is composed of component A and component B, component A is calculated in parts by weight, and the components are composed as follows: 15-25 parts of hydroxyl acrylic resin, polyacrylate water 18 parts of dispersion, 15 parts of filler, 5 parts of auxiliary agent and 4 parts of linear saturated polyester, the hydroxyl value of linear saturated polyester is 15mgKOH / g; component B is calculated in parts by weight, and the components are composed as follows: isocyanate curing agent 15 parts of solvent and 30 parts of solvent, and the isocyanate curing agent is one or a mixture of two or more of hexamethylene diisocyanate trimer, hexamethylene diisocyanate trimer and isophorone diisocyanate trimer.

[0016] In this embodiment, the isocyanate curing agent is hexamethylene diisocyanate trimer. Of course, this selection is not a limitation, and other isocyanate curing agents can also be used, as long as the s...

Embodiment 2

[0022] The second embodiment provides a two-component polyurethane coating, which is composed of component A and component B, component A is calculated in parts by weight, and the component composition is as follows: 25 parts of hydroxyl acrylic resin, polyacrylate aqueous dispersion 25 parts, 19 parts of filler, 9 parts of auxiliary agent and 7.5 parts of linear saturated polyester, the hydroxyl value of linear saturated polyester is 20mgKOH / g; B component is counted in parts by weight, and the component composition is as follows: isocyanate curing agent solvent 25 40 parts and solvent, the isocyanate curing agent is a mixture of hexamethylene diisocyanate trimer, hexamethylene diisocyanate trimer, isophorone diisocyanate trimer, hexamethylene diisocyanate trimer, hexamethylene diisocyanate trimer The mass ratio of diisocyanate trimer and isophorone diisocyanate trimer is 1:2:1.

[0023] In this embodiment, the hydroxyacrylic resin is a thermosetting hydroxyacrylic resin, the...

Embodiment 3

[0025] The third embodiment provides a two-component polyurethane coating, which is composed of component A and component B, component A is calculated in parts by weight, and the component composition is as follows: 20 parts of hydroxyl acrylic resin, polyacrylate aqueous dispersion 20 parts, 18 parts of filler, 5.5 parts of auxiliary agent and 6 parts of linear saturated polyester, the hydroxyl value of linear saturated polyester is 18 mgKOH / g; component B is calculated in parts by weight, and the components are composed as follows: isocyanate curing agent solvent 20 37 parts and 37 parts of solvent, the isocyanate curing agent is hexamethylene diisocyanate trimer.

[0026] In this embodiment, the hydroxyacrylic resin is a thermosetting hydroxyacrylic resin, the filler is calcium carbonate, and the auxiliary agents include dispersants, pigments, thixotropic agents, defoamers and leveling agents.

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Abstract

The invention provides a bi-component polyurethane coating, and relates to the field of coatings. The bi-component polyurethane coating is composed of a component A and a component B. The component A comprises, by weight, 15-25 parts of hydroxy acrylic resin, 18-25 parts of polyacrylate aqueous dispersion, 15-19 parts of padding, 5-9 parts of additives and 4-7.5 parts of linear saturated polyester, wherein the hydroxyl value of the linear saturated polyester ranges from 15 mgKOH / g to 20 mgKOH / g. The component B comprises, by weight, 15-25 parts of isocyanate curing agent solvent and 30-40 parts of solvent, wherein the isocyanate curing agent solvent is one of or a mixture of two or more of hexamethylene diisocyanate trimer, hexamethylene diisocyanate trimer and isophorone diisocyanate trimer. The bi-component polyurethane coating can allow the ratio of the component A to the component B to float within a small range, and high practicability is achieved.

Description

technical field [0001] The invention relates to the field of coatings, in particular to a two-component polyurethane coating. Background technique [0002] Two-component polyurethane waterproof coating is a kind of polyurethane coating, which is composed of two components A and B. When using, the two components must be weighed and matched in strict accordance with the prescribed ratio. If too little component A is added, the coating film will be sticky and soft, and the water resistance and chemical resistance will decrease. In severe cases, no film will be formed; if too much component A is added, the coating film will become hard and brittle , not impact resistant, poor elasticity, small elongation. The use of the existing two-component polyurethane waterproof material has a relatively high proportion requirement, and it is inconvenient to use. Contents of the invention [0003] In view of this, the present invention provides a two-component polyurethane coating to imp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/06C09D7/12C08G18/42C08G18/62
CPCC09D175/06C08G18/42C08G18/6216C08G18/792
Inventor 周宏林
Owner 四川珍福堂商贸有限公司
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