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A preparing method of water-based self-crosslinking acrylic acid modified polyurethane matte resin

A technology of self-crosslinking acrylic acid and matte resin, which is applied in the direction of coating, etc., can solve the problems of many side reactions of acrylic acid modification, unfavorable product stability, and over-complicated process, and achieve outstanding yellowing resistance and enhanced cross-linking density , good transparency effect

Active Publication Date: 2016-06-22
常州市日新树脂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The acrylic polyurethane matting resin prepared by the invention has the advantages of low-temperature curing, excellent masking of mold traces, high matting efficiency, water resistance, outstanding acid resistance and alkali resistance, good wear resistance, etc., and the polyurethane and acrylic resin are blocked by introducing anions The hydroxyl group in the resin undergoes a crosslinking reaction, which enhances the crosslinking density between the resins and improves the mechanical strength and surface abrasion resistance of the matting resin; however, nonionic polyurethane and ionic blocked polyurethane are prepared separately, and the process is too complicated. There are many side reactions in the modification, which is unfavorable to the stability of the product

Method used

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  • A preparing method of water-based self-crosslinking acrylic acid modified polyurethane matte resin

Examples

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Effect test

Embodiment 1

[0021] A kind of preparation method of waterborne self-crosslinking acrylic acid modified polyurethane matte resin, its preparation process comprises the following steps:

[0022] 1) In the synthesis kettle, add 15 parts of polyethylene glycol monobutyl ether (Mr600) according to the formula, start vacuuming and heat to 120°C, dehydrate for 4 hours under vacuum (1.067kPa), and then fill N 2 , lower the temperature to 80°C and add 50 parts of IPDI trimer, 15 parts of NMP and 0.016 parts of DBTDL according to the formula, raise the temperature to 90-110°C and keep it warm for 2-3 hours, then cool down to 60°C, add 2.5 parts of 1 according to the formula For 4-butanediol, slowly raise the temperature to 80°C and react for 1 hour, then add 8 parts of DMPA and 5 parts of acetone, keep the temperature at 80-85°C for 4-5 hours; cool down to 60°C, add 10 parts of triethylamine to neutralize After reacting for 0.5h, stop feeding N 2, add 175 parts of deionized water under high-speed ...

Embodiment 2

[0026] A kind of preparation method of waterborne self-crosslinking acrylic acid modified polyurethane matte resin, its preparation process comprises the following steps:

[0027] 1) In the synthesis kettle, add 12.5 parts of polycarbonate diol (Mr1000) according to the formula, start vacuuming and heat to 120°C, dehydrate for 4 hours under vacuum (1.067kPa), and fill with N 2 , lower the temperature to 80°C and add 25.5 parts of HDI trimer, 10 parts of NMP and 0.015 parts of DBTDL according to the formula, raise the temperature to 90-110 °C and keep it warm for 2-3 hours, then cool down to 60 °C, add 1.2 parts of 1 according to the formula For 4-butanediol, slowly raise the temperature to 80°C and react for 1 hour, then add 4.8 parts of DMPA and 3 parts of acetone, keep the temperature at 80-85°C for 4-5 hours; cool down to 60°C, add 6 parts of triethylamine to neutralize After reacting for 0.5h, stop feeding N 2 , add 110 parts of deionized water under high-speed stirring, ...

Embodiment 3

[0031] The water-based self-crosslinking acrylic acid-modified polyurethane matte resin in the above-mentioned examples 1 and 2 is used to prepare a one-component water-based woodware polyurethane matte varnish, and the formula is as follows: water-based self-crosslinking acrylic acid-modified polyurethane matte resin 75, primer Material wetting agent 0.2, leveling agent 0.2, defoamer 0.2, thickener 0.5, preservative 0.2, film-forming aid 3.0, PH regulator 0.1, water 21.0.

[0032] The basic properties of the above-mentioned one-component water-based polyurethane matt varnish for woodware were tested according to relevant national standards, and the test results are shown in Table 1.

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Abstract

The invention relates to a preparing method of water-based self-crosslinked acrylic acid modified polyurethane matte resin. The resin mainly comprises isocyanate tripolymer, polyether polyol or polyester polyol, dimethylolpropionic acid, acrylate, an alkali neutralizing agent and deionized water. The resin prepared by the method is low in VOC content, environmental friendly and free of pollution and is characterized by low-temperature curing performance, a high extinction efficiency, good transparency, protruding water proofness, protruding acid resistance, protruding alkali resistance, protruding stain resistance and protruding yellowing resistance. After modification, polyurethane and hydroxy in acrylic acid resin are crosslinked, thus enhancing the resin crosslinking density, and improving resin mechanical strength, wear resistance and scratch resistance. The matte resin is free of addition of a flatting agent and insensitive to electrolytes. Prepared coating is good in stability. The matte resin is widely used for water-based wood paint, water-based industrial paint, water-based plastic paint, and the like requiring matte effects.

Description

technical field [0001] The invention relates to a preparation method of water-based polyurethane resin, in particular to a water-based self-crosslinking acrylic acid modified polyurethane matte resin. Background technique [0002] Over the past 30 years of China's reform and opening up, the problem of environmental degradation has gradually emerged. According to the research of environmental departments and experts, the main pollution sources such as automobile exhaust, VOC, and flying dust are the main causes of haze weather. Among the main pollution sources, VOC emissions from the paint and coating industry account for 1% of the total VOC emissions. / 4 or more; China's annual VOC emissions exceed 20 million tons, which is twice that of the United States and three times that of the European Union. Recently, the smog has been reduced across the country. The whole society attaches great importance to the development of green production and green products. The government has ...

Claims

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Application Information

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IPC IPC(8): C09D151/08C08F283/00C08G18/79C08G18/66C08G18/48C08G18/42C08G18/34
Inventor 许钧强康伦国姚东生阳京辉
Owner 常州市日新树脂有限公司
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