Self-crosslinking polyurethane-acrylate composite emulsion and preparation method thereof

An acrylate and composite emulsion technology, applied in the direction of coating, can solve the problems of water-based polyurethane film forming temperature, low abrasion resistance, adhesion, water resistance and solvent resistance, mechanical properties, pollution process, cumbersome and other problems, and achieves chemical exchange. The effect of increasing junctions, avoiding contamination, and preventing water resistance decline

Inactive Publication Date: 2015-12-23
SKSHU PAINT
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a self-crosslinking polyurethane-acrylate composite emulsion and a preparation method thereof, which solves the problem that water-based polyurethane cannot have low film-forming temperature, good abrasion resistance and excellent adhesion, water resistance, solvent resistance and good mechanical properties The present invention further solves the cumbersome technical problems of pollution caused by the use of organic solvents and the process of extracting organic solvents in the later stage

Method used

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  • Self-crosslinking polyurethane-acrylate composite emulsion and preparation method thereof
  • Self-crosslinking polyurethane-acrylate composite emulsion and preparation method thereof
  • Self-crosslinking polyurethane-acrylate composite emulsion and preparation method thereof

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specific Embodiment approach

[0035] A preparation of self-crosslinking polyurethane-acrylic acid ester composite emulsion is characterized in that: it is prepared from the following steps of the following weight ratio raw materials:

[0036] 1) Preparation of polyurethane prepolymer:

[0037] Add 24.00-26.00 parts of polyester polyol and 25.36-30.18 parts of isophorone diisocyanate into the reactor, heat it to 80-85 ° C under the stirring speed of 300-500 rpm and nitrogen protection, and then measure the -NCO content until The measured -NCO content reaches the theoretical value;

[0038] Then keep the above speed and temperature, dissolve 0.88-2.20 parts of diacetone acrylamide into 42.00-46.00 parts of active diluent, then add the above diluent into the reaction system to adjust the viscosity of the system, and then add 4.00-5.00 parts of diacetone acrylamide Hydrophilic chain extender, 0.5-1 part of trimethylolpropane, 2.66-3.27 parts of dihydric alcohol and 0.04-0.08 part of dibutyltin dilaurate, then...

Embodiment 1

[0045] A self-crosslinking polyurethane-acrylic ester composite emulsion is characterized in that: it is formulated by the following components by weight and number:

[0046]

[0047]

[0048] A kind of preparation of self-crosslinking polyurethane-acrylic acid ester composite emulsion, it is prepared according to the following steps carried out in order by the raw material of following weight ratio:

[0049] 1) Preparation of polyurethane prepolymer:

[0050] Add 24.00 parts of polyester polyol and 25.36 parts of isophorone diisocyanate into a 500mL four-necked flask equipped with a stirrer, thermometer, and condenser tube, heat to 80°C at a stirring speed of 300rpm and under nitrogen protection, and react to the The measured -NCO content reached the theoretical value (16.94%), then 0.88 parts of diacetone acrylamide (DAAM) was dissolved in 12.2 parts of methyl methacrylate, 29.8 parts of butyl methacrylate, after fully dissolving , added to the reaction system to adju...

Embodiment 2

[0056] A self-crosslinking polyurethane-acrylic ester composite emulsion is characterized in that: it is formulated by the following components by weight and number:

[0057]

[0058] A kind of preparation of silane coupling agent modified polyurethane-acrylic ester composite emulsion, it is prepared according to the following steps carried out in order by the raw material of following weight ratio:

[0059] 1) Preparation of polyurethane prepolymer:

[0060] Add 26 parts of polyester polyol and 30.18 parts of isophorone diisocyanate into a 500mL four-necked flask equipped with a stirrer, a thermometer and a condenser tube, stir at 500rpm, heat to 85°C under nitrogen protection, and react to The measured -NCO content reaches the theoretical value (18.76%), then 2.20 parts of diacetone acrylamide (DAAM) is dissolved in 14.2 parts of methyl methacrylate, 31.8 parts of butyl methacrylate, fully dissolved After that, add it to the reaction system to adjust the viscosity of the...

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Abstract

The invention relates to a self-crosslinking polyurethane-acrylate composite emulsion and a preparation method thereof. The self-crosslinking polyurethane-acrylate composite emulsion is prepared from polyester polyol, isophorone diisocyanate, diacetone acrylamide, reactive diluent, a hydrophilic chain extender, trimethylolpropane, dihydric alcohol, dibutyltin dilaurate, a neutralizer, water, ethylenediamine, adipic dihydrazide, an initiating agent and an initiating agent diluting solvent. The self-crosslinking polyurethane-acrylate composite emulsion has the advantages that the problem that water resistance is lowered due to addition of an emulsifying agent is avoided, pollution caused by an organic solvent and tediousness of the process of extracting the organic solvent in later period are avoided, and the hardness and resistance of an adhesive film can be improved.

Description

technical field [0001] The invention relates to the technical field of water-based coatings, in particular to a self-crosslinking polyurethane-acrylate composite emulsion and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of the global economy and industry, a large amount of volatile organic substances are produced, causing serious pollution to the atmosphere. The organic substances released by paint during its generation and use are only behind cars, and it is a serious source of air pollution in cities. Therefore, almost all technicians in the coating industry are paying attention to the content of solvents and the research and development of solvent-free coatings. Water-based paint, as a paint that uses water as a solvent, has long been recognized by people. Various water-based coatings have also come out one after another and are quickly accepted by the market. [0003] Polyurethane has the advantages of low fil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/00C08F220/14C08F220/18C08F2/24C08G18/66C08G18/42C08G18/34C08G18/32C09D151/08
Inventor 洪杰王艳林伟
Owner SKSHU PAINT
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