Light extinction type waterborne polyurethane emulsion and preparation method thereof

A water-based polyurethane, matte technology, applied in the field of polyurethane, can solve the problems of poor wear resistance, poor gloss, acetone residue, etc., and achieve the effects of simple process, improved hardness and tensile properties, and accelerated polymerization or cross-linking

Pending Publication Date: 2019-07-23
JIANGMEN CAIGE ENVIRONMENTAL PROTECTION TECH IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a kind of delustering type water-based polyurethane emulsion and preparation method thereof, solve the problem of acetone residue, poor performance, poor water resistance, poor gloss, poor wear resistance, serious pollution, and process in the preparation process of the existing water-based polyurethane emulsion. cumbersome and other issues

Method used

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  • Light extinction type waterborne polyurethane emulsion and preparation method thereof
  • Light extinction type waterborne polyurethane emulsion and preparation method thereof

Examples

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Effect test

Embodiment 1

[0030] The matting type water-based polyurethane emulsion of the present embodiment is made up of the following components: a total of 10 parts of polyester diol and polycarbonate diol, 8 parts of castor oil, 30 parts of toluene diisocyanate, dimethylol 5 parts of propionic acid, 3 parts of trimethylolpropane, 4 parts of ethylenediamine, 6 parts of triethylamine, 100 parts of deionized water, 14 parts of nitrogen methylpyrrolidone, 10 parts of trimethylolpropane, ethyl acrylate and A total of 13 parts of 2-methyl methacrylate and 10 parts of dehydroabietic acid.

[0031] The preparation method of the matting type aqueous polyurethane emulsion of the present embodiment comprises the following steps:

[0032] 1) Put the polyol and castor oil into the reaction vessel according to the weight ratio, stir evenly and heat to 100°C for dehydration for 1.0h; then add dehydroabietic acid to the system, and slowly heat up to 155°C under nitrogen atmosphere and normal pressure , stir, an...

Embodiment 2

[0044] The matting type water-based polyurethane emulsion of the present embodiment is made up of the following components: 13 parts of polyester diols, 9 parts of castor oil, 20 parts of isophorone diisocyanate, 6 parts of dimethylol propionic acid , 2 parts of trimethylolpropane, 4 parts of ethylenediamine, 6 parts of triethylamine, 150 parts of deionized water, 14 parts of nitrogen methyl pyrrolidone, 7 parts of trimethylol propane, 12 parts of methyl acrylate, dehydrogenation 9 parts of abietic acid.

[0045]1) Put polyol and castor oil into the reaction vessel according to the weight ratio, stir evenly and heat to 105°C for dehydration for 0.8h; then add dehydroabietic acid to the system, and slowly heat up to 158°C under nitrogen atmosphere and normal pressure , stir, and heat up to 220°C;

[0046] 2) Cool the mixture to 55°C, and add isocyanate according to the weight ratio, heat up to 70-90, 70°C, keep warm for 1.5 hours and fully react, then add trimethylolpropane to...

Embodiment 3

[0057] The matting water-based polyurethane emulsion of the present embodiment is composed of the following components: 20 parts of polycarbonate diol, 10 parts of castor oil, 35 parts of hexamethylene diisocyanate, and 7 parts of dimethylol propionic acid , 1 part of trimethylolpropane, 5 parts of ethylenediamine, 7 parts of triethylamine, 170 parts of deionized water, 10 parts of nitrogen methylpyrrolidone, 9 parts of trimethylolpropane, 2-ethyl methacrylate, A total of 15 parts of ethyl acrylate and 2-methyl methacrylate, and 11 parts of dehydroabietic acid.

[0058] 1) Put the polyol and castor oil into the reaction vessel according to the weight ratio, stir evenly and heat to 110°C for 1.5h dehydration; then add dehydroabietic acid to the system, and slowly heat up to 160°C under nitrogen atmosphere and normal pressure , stir, and heat up to 220°C;

[0059] 2) Cool the mixture to 50°C, add isocyanate according to the weight ratio, heat it up to 75°C and keep it warm for ...

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Abstract

The invention discloses light extinction type waterborne polyurethane emulsion and a preparation method thereof. According to the light extinction type waterborne polyurethane emulsion, a novel raw material composition is adopted and has a cooperative effect to solve the problems of existing light extinction type waterborne polyurethane emulsion that the glossiness is relatively high, the rigidityis low, the water resistance is poor, the wearing resistance is poor and the like; meanwhile, the prepared polyurethane emulsion has no acetone residues and the performance of the emulsion is not influenced; a procedure is simple and convenient and industrial production is facilitated; in a reaction process, the polymerization or crosslinking degree of raw materials is relatively high, so that the quantity of double electric layers and the fluid volume of particles are ensured, the compatibility of the raw materials is improved, a relatively fine blending structure is formed and the wearing resistance is improved; meanwhile, latex particles with a relatively great grain diameter are generated by a produced polyurethane material; the surface of a membrane has relatively great roughness andhas good light extinction efficiency.

Description

technical field [0001] The invention belongs to the technical field of polyurethane, and in particular relates to a matting water-based polyurethane emulsion and a preparation method thereof. Background technique [0002] Water-based coatings are gradually replacing solvent-based coatings and becoming an important direction for the development of coatings in the world because they are non-flammable, non-toxic or low-toxic, have little harm to the environment, and have the advantages of saving energy and resources. With the improvement of people's living standards and aesthetic concepts, the requirements for matting resins are gradually increasing. These low-gloss resins are widely used in leather finishing, wood coating, plastic coating, paper finishing and other fields. Matting resin generally refers to the resin with obvious atomization and low gloss (matte) on the surface after film formation, which is mainly used in coating. Existing matting resins are mainly obtained ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/08C08G18/12C08G18/36C08G18/42C08G18/44C08G18/34C08G18/32C09D4/06
CPCC08G18/0823C08G18/12C08G18/36C08G18/42C08G18/44C08G18/6659C09D4/06C08G18/348C08G18/3206C08G18/3228
Inventor 陈志越
Owner JIANGMEN CAIGE ENVIRONMENTAL PROTECTION TECH IND
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