Preparation method of waterborne polyurethane resin

A water-based polyurethane and resin technology, applied in polyurea/polyurethane coatings, coatings, anti-corrosion coatings, etc., can solve problems such as air pollution and huge, and achieve the effects of increased tensile strength, low cost, and good water resistance

Inactive Publication Date: 2018-09-28
安徽皖东树脂科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solvent-based polyurethane coatings are a high-grade coating, but conventional solvent-based polyurethane coatings contain about 40% organic solvents, so the pollution of the paint VOC (volatile organic compounds) to the atmosphere is very large

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Under nitrogen protection, 0.1 part by weight of graphene oxide, 200 parts of polyneopentyl adipate, 40 parts of dimethylol propionic acid, 40 parts of N-methylpyrrolidone, 500 parts of deionized water, Mix and put in the reaction kettle, heat to 40°C, stir for 1H, slowly drop in 100 parts of diisocyanate, drop for 2H, heat up to 90°C, keep warm for 6H, cool down to 40°C, add triethylamine for neutralization, react for 1H, Add 30 parts of acetone, add 100 parts of ice cubes, quickly cool down to 10°C, add 30 parts of ketimine, stir at high speed for 4 hours, remove acetone under reduced pressure, and obtain a translucent aqueous polyurethane dispersion with fluorescence. 10% vitamin C solution was added dropwise to carry out in-situ reduction reaction for 6 hours to obtain graphene water-based polyurethane nanocomposite latex resin.

[0017] The hardness (Shore D) of the resin measured by experiment is 85, put the resin into 10% liquid caustic soda, 100 ℃, observe for o...

Embodiment 2

[0019] Under nitrogen protection, 20 parts by weight of graphene oxide, 230 parts of polyneopentyl adipate, 50 parts of dimethylol propionic acid, 70 parts of N-methylpyrrolidone, 700 parts of deionized water, Mix and put into the reaction kettle, heat to 70°C, stir for 1H, slowly drop in 120 parts of diisocyanate for 3H, heat up to 100°C, keep warm for 6H, cool down to 50°C, add triethylamine for neutralization, react for 1H, Add 50 parts of acetone, add 200 parts of ice cubes, quickly cool down to 20°C, add 70 parts of ketimine, stir at high speed for 8 hours, remove acetone under reduced pressure, and obtain a translucent aqueous polyurethane dispersion with fluorescence. 20% vitamin C solution was added dropwise to carry out in-situ reduction reaction for 8 hours to obtain graphene water-based polyurethane nanocomposite latex resin.

[0020] The hardness (Shore D) of the resin measured by the experiment is 90, put the resin into 10% liquid caustic soda, 100 ℃, observe for ...

Embodiment 3

[0022] Under nitrogen protection, 15 parts by weight of graphene oxide, 215 parts of polyneopentyl adipate, 45 parts of dimethylol propionic acid, 60 parts of N-methylpyrrolidone, 600 parts of deionized water, Mix and put into the reaction kettle, heat up to 60°C, stir for 1H, slowly drop in 110 parts of diisocyanate for 2.5H, heat up to 95°C, keep warm for 6H, cool down to 45°C, add triethylamine for neutralization, and react for 1H , add 40 parts of acetone, add 150 parts of ice cubes, rapidly cool down to 15°C, add 50 parts of ketimine, stir at high speed for 7 hours, remove acetone under reduced pressure, and obtain a translucent aqueous polyurethane dispersion with fluorescence. 20% vitamin C solution was added dropwise to carry out in-situ reduction reaction for 7 hours to obtain graphene water-based polyurethane nanocomposite latex resin.

[0023] The hardness (Shore D) of the resin measured by experiment is 88, put the resin into 10% liquid caustic soda, 100 ℃, observe...

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Abstract

The invention discloses a preparation method of waterborne polyurethane resin. The preparation method comprises the following steps: 1) carrying out polymerization, namely mixing the components in parts by weight: 0.1-20 parts of graphene oxide, 200-230 parts of poly(neopentyl glycol adipate), 40-50 parts of dimethylolpropionic acid, 40-70 parts of N-methylpyrrolidone and 500-700 parts of deionized water, placing the mixture into reaction kettle, and slowly dropping 100-120 parts of diisocyanate; 2) carrying out chain extension, namely adding triethylamine for neutralization, carrying out a reaction for 1h, adding 30-50 parts of acetone, carrying out rapid cooling to 10-20 DEG C, adding 30-70 parts of ketimine, and carrying out decompression to remove acetone to obtain a fluorescent semitransparent waterborne polyurethane dispersoid; and 3) dropwise adding a vitamin C solution for an in-situ reduction reaction. The preparation method is simple and convenient in process, low in cost andenvironment-friendly, and the waterborne polyurethane resin is particularly suitable for application as a coating raw material of water supply pipelines for residents due to good water resistance andno environment pollution and can also be used for sockets for residential electricity and wire coatings due to good insulation properties and corrosion resistance.

Description

technical field [0001] The invention relates to the field of coating resin preparation, in particular to a preparation method of waterborne polyurethane resin. Background technique [0002] Polyurethane resin is flexible and wear-resistant, and can be used as a coating agent and repairing agent for natural leather and artificial leather. The water-based polyurethane finishing agent overcomes the weakness of "hot stickiness and cold brittleness" of acrylic emulsion finishing agents, and the treated leather feels soft and slippery. Refreshing, plump, bright, with a strong sense of genuine leather, it can greatly improve the grade of leather goods and enhance market competitiveness. [0003] With the strengthening of people's awareness of environmental protection and environmental protection regulations, the research and development of environmentally friendly water-based polyurethane has been paid more and more attention. Its application has been continuously expanded from lea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/34C08G18/42C08G18/12C08G18/28C08K3/04C09D175/06C09D5/08C09D5/25
CPCC08G18/6659C08G18/12C08G18/348C08G18/4238C08K3/042C09D5/08C09D175/06C08G18/287
Inventor 薛兆能
Owner 安徽皖东树脂科技有限公司
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