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A kind of aqueous polyurethane-acrylate hybrid copolymer and preparation method thereof

A water-based polyurethane and acrylate technology, applied in the direction of coating, can solve the problems of high cost, easy gelation, unsafe production process, etc., and achieve the effect of good hardness, excellent performance and excellent wear resistance

Active Publication Date: 2020-08-28
WANHUA CHEMICAL (NINGBO) CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the patent document CN101481451B discloses a high solid content, latently cured polyurethane-acrylate hybrid emulsion, which uses post-crosslinking to improve various resistances; when the post-crosslinking equivalent is too high, the emulsion is unstable and post-crosslinking When the linking equivalent is insufficient, the improvement of the resistance is not obvious, and the cross-linking equivalent is not easy to control
Patent document CN101157749A discloses a polyurethane-modified acrylic emulsion, which is prepared by introducing carbonyl groups into the polyurethane part and the acrylate part respectively, and adding hydrazide to the emulsion for cross-linking, which solves the problem of polyurethane and acrylate hybrid emulsion. There is no problem of chemical cross-linking in the polyacrylate part, which increases a certain resistance; but the cross-linking method does not increase the resistance significantly, and the added hydrazide has certain toxicity, which limits the application of the product
Patent document CN101544739A discloses a polyurethane-acrylate hybrid copolymer emulsion with a special structure, which is inserted into the polyurethane segment through a self-made monomer with a double bond in the side chain, and then copolymerized with the acrylate monomer It is prepared so that the polyurethane part and the polyacrylate part in the chain segment can achieve phase separation, so as to maximize the performance of each; but the self-made monomer contains 4 functional groups that can react with isocyanate, the prepolymerization process cannot be controlled, and it is easy to gel , the production process is unsafe, and the cost is high, so it is extremely difficult to promote

Method used

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  • A kind of aqueous polyurethane-acrylate hybrid copolymer and preparation method thereof
  • A kind of aqueous polyurethane-acrylate hybrid copolymer and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0088] Add 80 parts of WANNATE HMDI, 40 parts of soybean oil alcoholyzate polyol 1, 40 parts of PCL220N, and 0.05 parts of organic bismuth catalyst into a four-necked flask equipped with a thermometer, reflux condenser, and stirrer, heat up to 85°C and keep it warm Reaction, after the NCO value is constant, cool down to 50°C, add 2 parts of trimethylolpropane (non-hydrophilic alcohol chain extender), 9 parts of dimethylol propionic acid, 2 parts of 1,4-butanediol And 32 parts of acetone, react at 75-80°C for 4-5h until the residual NCO is constant.

[0089] After cooling down to 50°C, add 78 parts of acetone, 110 parts of methyl methacrylate, and 6.8 parts of triethylamine, and stir for 10 minutes until uniform. After cooling down to room temperature, add 450 parts of water at a shear rate of 1300 rpm, and emulsify and disperse for 10 minutes. Add 12 parts of ethylenediamine solution with a mass concentration of 25% to the dispersed emulsion, and stir for 5 minutes.

[0090]...

Embodiment 2

[0092] Add 80 parts of WANNATE HMDI, 20 parts of soybean oil alcoholyzate polyol 2, 60 parts of PCL220N, and 0.05 parts of organic bismuth catalyst into a four-necked flask equipped with a thermometer, reflux condenser, and stirrer, raise the temperature to 85°C and keep it warm Reaction, after the NCO value is constant, cool down to 50°C, add 1 part of trimethylolpropane, 16 parts of dimethylol propionic acid, 1 part of 1.4-butanediol and 32 parts of acetone, and react at 75-80°C 4 ~ 8h until the residual NCO is constant.

[0093] After cooling down to 50°C, add 78 parts of acetone, 170 parts of methyl methacrylate, and 12 parts of triethylamine, and stir for 10 minutes until uniform. After cooling down to room temperature, add 560 parts of water at a shear rate of 1300 rpm, and emulsify and disperse for 10 minutes. Add 16 parts of ethylenediamine solution with a mass concentration of 25% to the dispersed emulsion, and stir for 5 minutes.

[0094] Add the emulsion prepared ...

Embodiment 3

[0096] Add 80 parts of WANNATE HMDI, 60 parts of soybean oil alcoholyzate polyol 3, 20 parts of PCL220N, and 0.05 parts of organic bismuth catalyst into a four-necked flask equipped with a thermometer, reflux condenser and stirrer, raise the temperature to 85°C and keep it warm Reaction, after the NCO value is constant, lower the temperature to 50°C, add 2 parts of trimethylolpropane, 7 parts of dimethylol propionic acid, 1 part of 1,4-butanediol and 32 parts of acetone, at 75-80°C The reaction was carried out for 4-5 hours until the residual NCO was constant.

[0097] After cooling down to 50°C, add 78 parts of acetone, 40 parts of methyl methacrylate, and 5.3 parts of triethylamine, and stir for 10 minutes until uniform. After cooling down to room temperature, add 320 parts of water at a shear rate of 1300 rpm, and emulsify and disperse for 10 minutes. Add 8 parts of ethylenediamine solution with a mass concentration of 25% to the dispersed emulsion, and stir for 5 minutes....

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Abstract

The invention belongs to the technical field of waterborne polyurethane materials, and provides a waterborne polyurethane-acrylate hybrid copolymer and a preparation method thereof. The waterborne polyurethane-acrylate hybrid copolymer is prepared by enabling the following components in parts by mass to be subjected to a reaction: 10-40 parts of aliphatic diisocyanate, 5-20 parts of polyester polyol, 5-28 parts of a soybean oil alcoholysate, 0-0.05 parts of a polyurethane reaction catalyst, 2-8 parts of a hydrophilic chain extender, 0-4 parts of a low molecular weight non-hydrophilic alcohol chain extender, 2-7 parts of a neutralizing agent, 20-80 parts of a (methyl) acrylate monomer, 0-5 parts of a low molecular organic amine chain extender and 0.01-2 parts of a radical initiator. The hardness and wear resistance of the copolymer prepared by the method are greatly improved.

Description

technical field [0001] The invention belongs to the technical field of waterborne polyurethane materials, and in particular relates to a waterborne polyurethane-acrylate hybrid copolymer and a preparation method thereof. Background technique [0002] With the improvement of people's awareness of environmental protection and the country's restrictions on volatile organic compounds (VOC) emissions, traditional solvent-based polyurethane coatings are gradually abandoned by the market during the application process, and the development of low-pollution and environmentally friendly water-based polyurethane materials has become everyone's consensus. . Water-based polyurethane coatings use water instead of organic solvents as the dispersion medium, which has good environmental protection value. It has gradually replaced traditional solvent-based polyurethane coatings in many fields. [0003] In order to obtain low-cost, high-performance water-based polyurethane products, various ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/75C08G18/67C08G18/42C08G18/12C08G18/32C08G18/34C08G18/66C08F283/00C08F220/14C09D151/08
CPCC08F283/008C08G18/0823C08G18/12C08G18/36C08G18/4277C08G18/6644C08G18/758C09D151/08C08G18/348C08G18/3206C08F220/14
Inventor 赵镇赵伟国孙伟祖张洁陈继宇邓俊英
Owner WANHUA CHEMICAL (NINGBO) CO LTD