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Water-based polyurethane dispersoid for dry coating primer as well as preparation method and application thereof

A water-based polyurethane and dispersion technology, used in polyurea/polyurethane coatings, coatings, etc., can solve the problems of resin performance and cost, and achieve the effects of improved performance, obvious performance, and improved water pressure resistance of fabrics

Active Publication Date: 2019-01-08
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under the premise of environmental protection and cost advantages, the primer-type water-based polyurethane resin has good water pressure resistance, excellent anti-blocking and fastness to yarn fixation based on synthetic raw materials and molecular structure design. , which solves the problem that resin performance and cost cannot be balanced

Method used

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  • Water-based polyurethane dispersoid for dry coating primer as well as preparation method and application thereof
  • Water-based polyurethane dispersoid for dry coating primer as well as preparation method and application thereof
  • Water-based polyurethane dispersoid for dry coating primer as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] To the four-necked flask equipped with reflux condenser, thermometer and mechanical stirring, add 45g TDI, 200g PPG2000, 25g MN3050, 6g X-22-176DX, and acetone were reacted at 80°C for 1 hour, and the theoretical NCO was 4.63%.

[0089] Cool to 60°C, add 7.67g DMPA, 1.25g NPG, 0.043g catalyst and 28g diluted acetone, stir evenly, heat up to 80°C, start timing at 75°C, react for 3.5-4.5h, and stop the reaction when theoretical NCO=1.99% is reached , then cooled to 60 °C, diluted with acetone, stirred and mixed for 5 mins to ensure that the prepolymer and acetone were fully mixed, and cooled to 30 to 35 °C.

[0090] Add 113g of acetone diluted 1010 (1.46g, light stabilizer) / 292 (1.46g, antioxidant), stir for 5min to ensure uniform mixing, add 4.63g of triethylamine and neutralize for 5min, at 1200 ~ 1500 rpm Under the condition of , adding the process water within 6min to obtain the water-based polyurethane dispersion, the number-average molecular weight of the polyuret...

Embodiment 2

[0093] Add 55g to the four-necked flask equipped with reflux condenser, thermometer and mechanical stirring TDI, 200g PPG2000, 30g MN3050, 8g X-22-176DX, and acetone were reacted at 80°C for 1 hour, and the theoretical NCO was 6.10%.

[0094] Cool to 60°C, add 8g DMPA, 5g NPG, 0.0459g catalyst and 30g diluted acetone, stir evenly, heat up to 80°C, start timing at 75°C, react for 3.5-4.5h, stop the reaction when theoretical NCO=2.26% is reached, and then Cool down to 60°C, add acetone to dilute, stir and mix for 5 mins to ensure that the prepolymer and acetone are fully mixed, and cool down to 30-35°C.

[0095] Add 122g of acetone diluted 1010(1.57g) / 292(1.57g), stir for 5min to ensure uniform mixing, add 4.83g of triethylamine and neutralize for 5min, under the condition of 1200~1500 r / min, put the process water in Add within 6 minutes to obtain an aqueous polyurethane dispersion, and the molecular weight of the polyurethane is about 10,000.

[0096] 3.5g of ethylenediamine...

Embodiment 3

[0098] To the four-necked flask equipped with reflux condenser, thermometer and mechanical stirring, add 45g DI, 120g PPG1000, 20g MN3050, 6g X-22-176DX, and acetone were reacted at 75°C for 1 h, and the theoretical NCO was 5.87%.

[0099]Cool down to 60°C, add 5.6g DMPA, 1.2g NPG, 0.03g catalyst and 20g diluted acetone, stir evenly, raise the temperature to 75°C, start timing at 75°C, react for 3.5-4.5h, and stop the reaction when the theoretical NCO=2.82% is reached , then lower the temperature to 60°C, add acetone to dilute, stir and mix for 5mins to ensure that the prepolymer and acetone are fully mixed, and lower the temperature to 30-35°C.

[0100] Add 79g of 1010 (1.02g) / 292 (1.02g) diluted with acetone, stir for 5 minutes to ensure uniform mixing, add 3.38g of triethylamine for neutralization for 5 minutes, and process water under the condition of 1200-1500 rpm Add within 6 minutes to obtain a water-based polyurethane dispersion, and the molecular weight of the poly...

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Abstract

The invention discloses a water-based polyurethane dispersoid for a dry coating primer as well as a preparation method and application thereof. The polyurethane is obtained by polymerizing the following raw materials: a) at least one diisocyanate; b) at least one polyether glycol and / or polyester glycol; c) at least one polyether or polyester polyol with functionality degree more than or equal to3; d) at least one micromolecular polyol chain extender containing active hydrogen; e) at least one carboxylic acid hydrophilic chain extender containing active hydrogen; f) at least one polyamine micromolecular chain extender containing active hydrogen; and g) at least one organosilicone polyol containing active hydrogen, wherein the molecule side chain contains organosilicone. The water-based polyurethane dispersoid for the dry coating primer can achieve good anti-adhesion effect on the premise of guaranteeing soft hand feeling of resin.

Description

technical field [0001] The invention relates to a water-based polyurethane dispersion used for a dry-process coating primer and a preparation method and application thereof. Starting from the molecular structure design, a resin having performance and hand feeling equivalent to that of a solvent-based primer is obtained. Background technique [0002] The existing bags, tents, and clothing coating markets are large and developing rapidly. With the development of technology, various coated products have realized diversified production, which enriches people's lives. During the processing of coated products, the bonding process between the coating and the substrate is an important process, and the quality of the adhesive directly affects the quality of the coated product. [0003] Polyurethane adhesives refer to adhesives containing urethane groups (-NHCOO-) or isocyanate groups (-NCO) in the molecular chain. Polyurethane adhesives are divided into two categories: polyisocyanat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/12C08G18/48C08G18/08C08G18/34C08G18/32C08G18/61C08G18/40C09D175/08
CPCC08G18/0823C08G18/12C08G18/4009C08G18/4812C08G18/4825C08G18/4829C08G18/61C08G18/6692C09D175/08C08G18/348C08G18/3206
Inventor 张洁刘姗周操王萃萃胡海东王少鹏邓俊英
Owner WANHUA CHEM GRP CO LTD
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