High-elasticity waterborne polyurethane-acrylate composite resin, and preparation method and application thereof

A technology of water-based polyurethane and acrylate, applied in the direction of coating, etc., can solve the problem of less high-elastic resin

Active Publication Date: 2012-06-27
WANHUA CHEM GUANGDONG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are relatively few studies on the preparation of high e...

Method used

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  • High-elasticity waterborne polyurethane-acrylate composite resin, and preparation method and application thereof
  • High-elasticity waterborne polyurethane-acrylate composite resin, and preparation method and application thereof
  • High-elasticity waterborne polyurethane-acrylate composite resin, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] Add 45 parts of polyoxypropylene diol DL2000, 20 parts of WANNATE HMDI (Yantai Wanhua Polyurethane Co., Ltd., 4,4'-dicyclohexylmethane diisocyanate to the four-neck flask equipped with thermometer, reflux condenser and stirrer The content is 99.1%, the same below) and 0.02 parts of dibutyltin dilaurate, heat up to 85°C and keep warm for reaction, after the NCO content reaches 3.4%-3.6%, cool down to 50°C, add 1.1 parts of 1,4-butanediol , 3.9 parts of dimethylolpropionic acid and 21 parts of acetone, and react at a constant temperature at 80°C until the NCO content is 0.72%-0.82%.

[0089] After cooling down to 50°C, add 35 parts of n-butyl methacrylate, 25 parts of isooctyl acrylate, and 3 parts of triethylamine, and keep stirring at 50°C for 10 minutes. Cool down to room temperature, slowly add 120 parts of deionized water to the above system at a shear rate of 1000r-min, and emulsify and disperse for 15 minutes. Add 1.6 parts of 50% hexamethylenediamine aqueous solu...

Embodiment 2

[0092] Add 50 parts of polytetrahydrofuran ether glycol PTMEG1000, 16 parts of HDI and 0.02 part of dibutyltin dilaurate into a four-neck flask equipped with a thermometer, reflux condenser and stirrer, raise the temperature to 85°C and keep it warm until the NCO content reaches 2.8%-3.1%, then lower the temperature to 50°C, add 3.9 parts of dimethylolpropionic acid and 22 parts of acetone, and react at a constant temperature at 80°C until the NCO content is 0.95%-1.2%.

[0093] After cooling down to 50°C, add 32 parts of n-butyl methacrylate, 18 parts of isooctyl acrylate, and 3 parts of triethylamine, and keep stirring at 50°C for 10 minutes. Cool down to room temperature, slowly add 108 parts of deionized water to the above system at a shear rate of 1000r-min, and emulsify and disperse for 15 minutes. Add 2.4 parts of hexamethylenediamine aqueous solution with a mass concentration of 50% to the dispersed emulsion, and stir for 10 minutes to obtain a water-based polyurethane...

Embodiment 3

[0097] Add 35 parts of polyoxypropylene diol DL2000, 10 parts of WANNATE HMDI, 5 parts of HDI and 0.02 parts of dibutyltin dilaurate into a four-necked flask equipped with a thermometer, reflux condenser and stirrer, raise the temperature to 85°C and keep it warm for reaction After the NCO content reaches 4.2%-4.6%, cool down to 50°C, add 3 parts of dimethylolpropionic acid and 16 parts of acetone, and react at a constant temperature at 80°C until the NCO content is 0.8%-1.1%.

[0098] After cooling down to 50°C, add 27 parts of n-butyl methacrylate, 13 parts of isooctyl acrylate, and 2.2 parts of triethylamine, and keep stirring at 50°C for 10 minutes. Cool down to room temperature, slowly add 86 parts of deionized water to the above system at a shear rate of 1000r-min, and emulsify and disperse for 15 minutes. Add 1.6 parts of hexamethylenediamine aqueous solution with a mass concentration of 50% to the dispersed emulsion, and stir for 10 minutes to obtain a water-based poly...

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Abstract

The invention relates to a high-elasticity waterborne polyurethane-acrylate composite resin which is prepared mainly from the following raw materials: 7 to 20 parts by mass of aliphatic polyisocyanates with highly symmetrical structure, 25 to 45 parts by mass of polyether polyol, 0 to 0.03 parts by mass of polyurethane catalyst, 0 to 2 parts by mass of low molecular weight alcohol chain extender, 1 to 6 parts by mass of hydrophilic chain extender, 0.4 to 1.5 parts by mass of low molecular weight amine chain extender, 1 to 4 parts by mass of organic amine neutralizer, 20 to 60 parts by mass of (methyl) acrylate monomer and 0.08 to 1.3 parts by mass of free radical initiator. The high-elasticity waterborne polyurethane-acrylate composite resin disclosed by the invention has good mechanical property at different using temperatures. A coating prepared from the high-elasticity waterborne polyurethane-acrylate composite resin not only has excellent mechanical property, but also has excellent water resistance, alkali resistance, stain resistance and ageing resistance, so the high-elasticity waterborne polyurethane-acrylate composite resin is very suitable for preparing the single-component elastic coating in the field of buildings.

Description

technical field [0001] The invention relates to a waterborne polyurethane-acrylate composite resin, in particular to a highly elastic waterborne polyurethane-acrylate composite resin. The composite resin can be used to prepare elastic coatings, and is especially suitable for elastic coatings in the construction field. Background technique [0002] The traditional solvent-based polyurethane requires a large amount of organic solvents in the synthesis and application process. The volatilization of solvents and the residual solvents in the products will cause serious harm to the health of construction workers and consumers. With the improvement of people's awareness of environmental protection and the restrictions on the content of volatile organic compounds (VOC) in various countries, it has become a consensus to develop low-pollution and environmentally friendly water-based polyurethane products. Water-based polyurethane uses water instead of organic solvents as the dispersi...

Claims

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Application Information

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IPC IPC(8): C08F283/00C08F220/14C08F220/18C08F2/22C08F4/40C08G18/75C08G18/73C08G18/66C08G18/48C08G18/12C09D151/08
Inventor 刘波张洁孙家宽华卫琦
Owner WANHUA CHEM GUANGDONG
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