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A kind of preparation method of waterborne acrylic polyurethane matting resin with phase separation structure

A technology of acrylic polyurethane and matting resin, applied in the coating and other directions, can solve the problems of the coating being easily affected by the solvent, insufficient masking of mold scars, increased energy consumption, etc., and achieve excellent masking of mold marks, improve mechanical strength and surface Scratch resistance, the effect of a wide range of raw materials

Active Publication Date: 2016-08-24
GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the coatings of the above two inventions must be baked above 170°C, which will easily cause cracks in the coating film and affect the performance of the coating film; in addition, the energy consumption will increase, which will cause economic losses.
[0005] In addition, there are water-based electrophoretic coatings made of carboxyl- and hydroxyl-containing resins and blocked polyisocyanate compounds. There are coating films with excellent performance and low gloss that can be baked and cured at 140°C, but the masking of mold flaws is not enough. "JP-P-8 - Bulletin No. 41380"
[0006] Among the methods mentioned above, the solution polymerization method is mostly used in the production process of vinyl resin, and a large amount of organic solvents are used in the production process. The coating is easily affected by the solvent, and contains a large amount of volatile organic compounds (Volatileorganic compounds, VOC), polluting environment, harmful to the human body

Method used

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  • A kind of preparation method of waterborne acrylic polyurethane matting resin with phase separation structure
  • A kind of preparation method of waterborne acrylic polyurethane matting resin with phase separation structure
  • A kind of preparation method of waterborne acrylic polyurethane matting resin with phase separation structure

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Experimental program
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Effect test

Embodiment 1

[0046] A preparation method of acrylic polyurethane matting resin with phase separation structure, comprising the following steps:

[0047] (1) Preparation of anionic blocked polyurethane: mix 0.10mol isophorone diisocyanate with 0.025mol polyethylene glycol (molecular weight 400), add 1-2 drops of catalyst dibutyltin laurate, 50ml acetone, stir well, Reflux reaction in a constant temperature water bath at 80°C for 1.5h, add 0.0125mol 1,4-butanediol to continue the reaction for 1h while stirring, then add 0.0525mol dimethylol propionic acid to continue the reaction for 4h, add 0.8mol methyl ethyl ketone oxime to continue the reflux reaction for 2h, When it is determined that there is no free -NCO in the product by the dibutylamine method, cool down to 60°C, add 0.0525mol triethylamine to continue the reaction for 0.5h, add distilled water under high-speed stirring, vigorously shear and stir for 0.5h, cool down, Extract acetone to obtain anionic blocked polyurethane;

[0048] ...

Embodiment 2

[0053] A preparation method of acrylic polyurethane matting resin with phase separation structure, comprising the following steps:

[0054] (1) The preparation method of anionic polyurethane is the same as the step (1) of Example 1;

[0055] (2) Preparation of non-ionic polyurethane: add 0.05mol HDI trimer and 0.15mol polyethylene glycol monomethyl ether (molecular weight 1000), 1-2 drops of catalyst dibutyltin laurate, 50ml acetone into the reactor, stir Evenly, reflux reaction in a constant temperature water bath at 80°C for 5 hours, and when the product does not contain free -NCO by the dibutylamine method, add distilled water under high-speed stirring, vigorously shear and stir for 0.5 hours, cool down and remove acetone, and prepare Obtain non-ionic polyurethane;

[0056] (3) Mix 12 parts of methyl methacrylate, 7.5 parts of hydroxyethyl methacrylate, 5.0 parts of methacrylic acid, 7.7 parts of butyl methacrylate, 10.2 parts of butyl acrylate, and 7.6 parts of styrene to...

Embodiment 3

[0060] A preparation method of acrylic polyurethane matting resin with phase separation structure, comprising the following steps:

[0061] (1) Preparation of anionic blocked polyurethane: mix 0.10mol isophorone diisocyanate with 0.025mol polyethylene glycol (molecular weight 1000), add 1-2 drops of catalyst dibutyltin laurate, 50ml acetone, stir well, Reflux reaction in a constant temperature water bath at 80°C for 1.5h, add 0.0125mol 1,4-butanediol to continue the reaction for 1h while stirring, then add 0.0525mol dimethylolpropionic acid to continue the reaction for 4h, add 0.8mol methyl ethyl ketone oxime to continue the reflux reaction for 2h, When it is determined that there is no free -NCO in the product by the dibutylamine method, cool down to 60°C, add 0.0525mol triethylamine to continue the reaction for 0.5h, add distilled water under high-speed stirring, vigorously shear and stir for 0.5h, and cool down. Extract acetone to obtain anionic blocked polyurethane;

[00...

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Abstract

The invention discloses a preparation method of a water-based acrylic polyurethane matting resin with a phase separation structure, belonging to the field of water-based matting paints. The acrylic polyurethane matting resin with a phase-separated structure comprises the following components in parts by weight: 30-68 parts of acrylate; 10-34 parts of ionic blocked polyurethane; 5-17 parts of non-ionic polyurethane; 0.18-68 parts of initiator 0.41 parts; 0.03-0.068 parts of chain transfer agent; 4.2-11.7 parts of basic compound; 90-204 parts of water. The acrylic polyurethane matting resin prepared by the invention has the advantages of low-temperature curability, excellent masking of mold traces, high matting efficiency, water resistance, outstanding acid resistance and alkali resistance, good wear resistance and the like. Moreover, the crosslinking reaction between the anion-blocked polyurethane and the hydroxyl group in the acrylic resin is introduced to enhance the crosslinking density between the resins, and improve the mechanical strength and surface abrasion resistance of the matting resin.

Description

technical field [0001] The invention belongs to the field of water-based matting coatings, in particular to a preparation method of a water-based acrylic polyurethane matting resin with a phase separation structure. Background technique [0002] In recent years, water-based matting coatings have been widely demanded, but most of these matting coatings are made by adding matting agents or matting powders. As a water-based matting coating of this preparation method, for example, a method of dispersing a silica matting agent in a self-crosslinking acrylic resin (CN101186773A); a water-based one-component matting type in which a matting agent is added to an acrylic-modified polyurethane system Clear finish paint (CN102363702); Add matting agent to polyacrylic acid polyol to form component A, and then mix component A and component B anion-modified HDI polyisocyanate in proportion to make water-based two-component matting clear Topcoat (CN102363696A); method of adding matting pow...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/00C08F220/14C08F220/28C08F220/06C08F220/18C08F212/08C08G18/66C08G18/42C08G18/48C09D151/08
Inventor 庞浩区菊花廖兵黄健恒邓理郑景新刘海路程劲松
Owner GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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