Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of two-component polyurethane coating composition and its preparation method and coating method

A two-component polyurethane and composition technology, used in polyurea/polyurethane coatings, devices for coating liquids on surfaces, coatings, etc. Foaming and other problems, to restore scratch marks, improve hardness, improve gloss effect

Inactive Publication Date: 2011-12-14
广东顺德莱特尔科技有限公司
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem that low-temperature varnishes have low gloss, are easy to lose gloss and slow to increase in hardness, and are prone to blistering and film defects when applying single-layer or multi-layer coatings on plastic substrates and steel substrates.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0029] The present invention also provides the preparation method of above-mentioned coating composition, comprises the following steps:

[0030] (1) Add the acrylic resin to the solvent and stir and mix evenly to obtain a solution;

[0031] (2) mixing the auxiliary agent with the solution obtained in step (1) to obtain the original paint;

[0032] (3) polyisocyanate is added in the former paint that step (3) obtains, mixes homogeneously;

[0033] (4) Filter the mixture obtained in the above step (3) with a 400-mesh filter screen to obtain a coating composition.

[0034] Wherein, the filter screen may be, for example, a stainless steel filter screen.

[0035] The invention also provides a coating method using the two-component polyurethane coating composition. Methods of coating different substrates include single-layer coating methods and multi-layer coating methods.

[0036] Wherein, the monolayer coating method comprises the following steps:

[0037] (1) Polish the bas...

Embodiment 1

[0049] Steps for making the coating composition:

[0050] (1) High hydroxyl acrylic resin SM515 (solid 70%, hydroxyl content 4.5%, unbranched) produced by 40g UCB, low hydroxyl acrylic resin A870BA (solid 60%, hydroxyl content 1.8%, branched chain carbon) produced by 10g Bayer number is less than 3) added to a mixed solvent composed of butyl acetate 35g, xylene 14g, dimethyl nylon acid 10g, n-butanol 5g to dissolve, and mix well;

[0051] (2) Add 1.0g of BYK331 leveling agent, 0.5g of UV292 ultraviolet light absorber, 0.5g of UV284-2 ultraviolet light absorber, and 0.1g of T-12 drier to the above mixture, dissolve and mix evenly to obtain the original paint.

[0052] (3) Add 20 g of Bayer-produced isocyanate N3390 (19.6% isocyanate group content, 90% solid content) to the above mixture, dissolve and mix evenly.

[0053] (4) Filter with a 400-mesh stainless steel net to obtain a coating composition.

[0054] The steps of single-layer coating of ABS substrate:

[0055] (1) Po...

Embodiment 2

[0067] Prepare the coating composition according to the method of Example 1, and carry out ABS substrate single-layer coating; PP material plastic substrate, tinplate steel substrate 3-layer coating. The difference is that what the high hydroxyl acrylic resin adopted was CY430 (70% solid, 4.3% hydroxyl content, branched chain carbon number less than 5) produced by DSM Company, and what the low hydroxyl acrylic resin adopted was CY468 (60% solid produced by DSM Company). , hydroxyl content 1.8%, no branching), change the T-12 drier to 0.5g.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

A two-component polyurethane coating composition. There is a corresponding relationship between the performance of the application of acrylic resin and the corresponding structure. The basic components are acrylic resin with a group A branch chain carbon number less than 6 and B component polyisocyanate. Add solvent and auxiliary agent, wherein the acrylic resin includes high hydroxyl acrylic resin and low hydroxyl acrylic resin, and the polyisocyanate is a trimer polyisocyanate. The coating prepared by the coating composition not only has high hardness, high strength, high weather resistance and high flexibility, but also has the advantages of high gloss, long-term gloss and color retention, multi-layer coating film without blistering and the like.

Description

【Technical field】 [0001] The invention relates to a two-component polyurethane coating composition, a preparation method thereof and a method for forming a coating film. 【Background technique】 [0002] Two-component acrylic polyurethane coatings in acrylic coatings are high-quality, environmentally friendly new coatings developed in recent years. Two-component acrylic urethane coatings generally consist of an A component (hydroxy acrylic resin) and a B component (isocyanate). The hydroxyl group of hydroxyacrylic resin and isocyanate are cross-linked and cured, and the polyester macromolecular structure contains both carbamate group and C-C long chain segment of acrylic resin, so it has the advantages of both polyurethane and acrylic resin, and its comprehensive performance is very good. Compared with general products, it is considered to be one of the most promising coating varieties. The energy consumption of two-component acrylic polyurethane coating is very low when it ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/14B05D1/36
Inventor 秦玉明刘伟强蒙飞
Owner 广东顺德莱特尔科技有限公司