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Waterborne polyurethane-acrylic acid water-based paint and preparation method thereof

A water-based polyurethane and acrylic water-based technology, applied in coatings and other directions, can solve the problems of hardness, oil resistance, chemical reagent resistance, water resistance, hot stickiness, cold brittleness, etc., and achieve good fullness, high solid content, and continuous freshness. good sex effect

Inactive Publication Date: 2021-06-01
KUNSHAN SAKURA PAINT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing water-based acrylic paints have defects in hardness, oil resistance, chemical resistance and water resistance, and acrylic water-based paints are prone to thermal stickiness and brittleness

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0021] The invention provides a kind of preparation method of water-based polyurethane-acrylic acid water-based paint, it comprises the following steps:

[0022] Preparation of waterborne polyurethane-acrylic acid

[0023] (1) Add polyether diol to a four-necked flask equipped with a stirrer, a thermometer and a condensing tube, and carry out dehydration treatment for 1-3 hours at a temperature of 90-120°C, and then add diphenylmethane diisocyanate (N- MDEA) and methyl methacrylate (MMA) were reacted for 1-3 hours at a controlled temperature of 70-100°C to prepare a mixed solution A;

[0024] (2) Add N-methylpyrrolidone and methacrylic acid to the mixed liquid A prepared in step (1) and control the temperature at 60-90°C for 1-3 hours, then add the chain extender butanediol at 60 Perform chain extension reaction at ~90°C for 1-3 hours to prepare mixed solution B;

[0025] (3) Add triethylamine to the mixed solution B prepared in step (2), and react at a temperature of 30-50°...

Embodiment 1

[0037] Preparation of waterborne polyurethane-acrylic acid

[0038] (1) Add 30g of polyether diol to a four-necked flask equipped with a stirrer, thermometer and condenser, dehydrate at a temperature of 90°C for 1h, and then add 20g of diphenylmethane diisocyanate (N-MDEA) React with 10 g of methyl methacrylate (MMA) at a controlled temperature of 70°C for 1 h to prepare a mixed solution A;

[0039] (2) Add 10g of N-methylpyrrolidone and 20g of methacrylic acid to the mixed liquid A prepared in step (1) and control the temperature at 60°C for 1h, then add chain extender 20g of butanediol at 60°C The chain extension reaction was carried out under the condition of 1h, and the mixed liquid B was obtained;

[0040] (3) Add 15g of triethylamine to the mixed liquid B prepared in step (2), react at a temperature of 30°C for 30mins, add water after the reaction and stir quickly to mix evenly, and stir at a temperature of 40°C 30mins made mixed solution C;

[0041] (4) Add 15g of co...

Embodiment 2

[0045] Preparation of waterborne polyurethane-acrylic acid

[0046] (1) Add 40g of polyether diol to a four-necked flask equipped with a stirrer, a thermometer and a condenser tube, dehydrate at a temperature of 100°C for 2 hours, and then add 20g of diphenylmethane diisocyanate (N-MDEA) React with 15 g of methyl methacrylate (MMA) at a controlled temperature of 80°C for 2 hours to prepare a mixed solution A;

[0047] (2) Add 10g of N-methylpyrrolidone and 20g of methacrylic acid to the mixed liquid A prepared in step (1) and control the temperature at 60°C for 1 hour, then add chain extender 20g of butanediol at 60°C The chain extension reaction was carried out under the condition of 1h, and the mixed liquid B was obtained;

[0048] (3) Add 25g of triethylamine to the mixed liquid B prepared in step (2), react at a temperature of 30°C for 30mins, add water after the reaction and stir quickly to mix evenly, and stir at a temperature of 40°C 30mins made mixed solution C;

[...

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Abstract

The invention provides waterborne polyurethane-acrylic acid water-based paint. The waterborne polyurethane-acrylic acid water-based paint is prepared from 60%-70% of prepared waterborne polyurethane-acrylic acid, 1.0%-10% of a coalescing agent, 0.7%-1.0% of a flatting agent, 0.3%-0.8% of a wetting agent, 3.0%-10% of nano titanium dioxide, 0.6%-0.9% of an anti-after-tack agent and 0.1%-0.5% of a thickening agent, and the film forming state is adjusted, so that the finished product water-based paint is obtained. The waterborne polyurethane-acrylic acid water-based paint has the advantages of high solid content, good fullness, good adhesiveness to the surfaces of various materials, high toughness and hardness of a paint film, high wear resistance and impact resistance, no softening of the paint film after being heated, extremely high hot spot resistance and good freshness persistence, and the hardness of the paint film can reach H-2H in a pencil test.

Description

technical field [0001] The invention relates to a water-based polyurethane-acrylic acid water-based paint, in particular to a water-based polyurethane-acrylic acid water-based paint and a preparation method thereof, belonging to the technical field of environmental protection materials. Background technique [0002] Water-based coatings are superior to traditional paints in terms of environmental performance, but in terms of physical properties, water-based coatings have defects such as difficult construction, water resistance, easy peeling, poor fullness, and poor hardness. Due to its strong hardness, high fullness of paint film, and tolerance of construction, paint is still the first choice of paint for many people's decoration. Only when the deficiencies in physical properties are solved, or even surpassed by traditional paints, will water-based paints be used. The existing water-based acrylic paint has the disadvantages of hardness, oil resistance, chemical resistance a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D151/08C08F283/00C08F220/20C08G18/32C08G18/48C08G18/67C08G18/66
CPCC08F283/008C08G18/3206C08G18/4825C08G18/672C09D151/08C08G18/6674C08F220/20
Inventor 朱小明
Owner KUNSHAN SAKURA PAINT TECH
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