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Waterborne polyurethane resin as well as preparation method and application thereof

A water-based polyurethane and resin technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve problems such as poor stone chip resistance, achieve excellent stone chip resistance, reduce VOC, and reduce environmental impact

Active Publication Date: 2020-11-10
中山大桥化工集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Water-based polyurethane resin is mainly used in water-based automotive paint and water-based base paint for automobiles. The water-based paint for automobiles made of existing water-based polyurethane resins has poor stone chip resistance.

Method used

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  • Waterborne polyurethane resin as well as preparation method and application thereof
  • Waterborne polyurethane resin as well as preparation method and application thereof
  • Waterborne polyurethane resin as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A kind of aqueous polyurethane resin, comprises the raw material of following parts by weight:

[0034] Polycarbonate diol: 20 parts;

[0035] Dimethylolbutyric acid: 5 parts;

[0036] Isophorone diisocyanate: 20 parts;

[0037] Pentaerythritol: 4 parts;

[0038] 1.2-Propanediol: 5 parts;

[0039] Tin dilaurate: 1 part;

[0040] Triethylamine: 4 parts.

[0041] Its preparation method comprises the following steps:

[0042] (1) Under nitrogen protection, 20 parts of polycarbonate diol, 5 parts of dimethylol butyric acid, 20 parts of isophorone diisocyanate, 1 part of tin dilaurate are added to the reactor, and the temperature is raised to 80 ℃, reaction 2h;

[0043] (2) Add 4 parts of pentaerythritol, further react for 2 hours, then add 5 parts of 1.2-propylene glycol, stir and react for 1 hour, cool down, add 4 parts of triethylamine for neutralization reaction;

[0044] (3) Add 112 parts of deionized water under high shear conditions and stir for 2 hours to obt...

Embodiment 2

[0046] A kind of aqueous polyurethane resin, comprises the raw material of following parts by weight:

[0047] Polyester diol: 25 parts;

[0048] Sodium 1,4-dihydroxy-2-butanesulfonate: 3 parts;

[0049] Diphenylmethane diisocyanate: 15 parts;

[0050] Hexamethylene diisocyanate: 5 parts;

[0051] Trimethylolpropane: 3 parts;

[0052] Palm oil: 6 parts;

[0053] 1,4-butanediol: 6 parts;

[0054] Bismuth laurate: 1.5 parts;

[0055] N,N`-Dimethylethanolamine: 6 parts.

[0056] Its preparation method comprises the following steps:

[0057] (1) Under the protection of nitrogen, 25 parts of polyester diol, 3 parts of 1,4-dihydroxy-2-butane sulfonate sodium, 15 parts of diphenylmethane diisocyanate, 5 parts of hexamethylene diisocyanate 1.5 parts of bismuth laurate were added to the reactor, the temperature was raised to 90°C, and the reaction was carried out for 3 hours;

[0058] (2) Add 3 parts of trimethylolpropane and 6 parts of palm oil, further react for 3 hours, the...

Embodiment 3

[0061] A kind of aqueous polyurethane resin, comprises the raw material of following parts by weight:

[0062] Polyether diol: 30 parts;

[0063] Sodium 1,4-dihydroxy-2-butanesulfonate: 2 parts;

[0064] Cyclohexane dimethylene diisocyanate: 25 parts;

[0065] Trimethylolpropane: 2 parts;

[0066] Palm oil: 5 parts;

[0067] Hexamethylenediamine: 3 parts;

[0068] Tin protochloride: 1.2 parts;

[0069] N,N`-diisopropylethylamine: 6 parts.

[0070] Its preparation method comprises the following steps:

[0071] (1) Under the protection of nitrogen, 30 parts of polyether diol, 2 parts of 1,4-dihydroxy-2-butane sulfonate sodium, 25 parts of cyclohexane dimethylene diisocyanate, 1.2 parts of chlorinated Add tin into the reactor, raise the temperature to 75°C, and react for 4 hours;

[0072] (2) Add 2 parts of trimethylolpropane and 5 parts of palm oil, further react for 2 hours, then add 3 parts of hexamethylenediamine, stir and react for 2 hours, cool down, add 6 parts of ...

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Abstract

The invention discloses waterborne polyurethane resin and a preparation method and application thereof. The waterborne polyurethane resin is obtained through a reaction of a polyol prepolymer, a hydrophilic monomer, an isocyanate monomer, a functional monomer, a chain extender and organic alkali, and the hydrophilic monomer is at least one of a dihydroxy compound, polyethylene glycol and quaternary ammonium salt; wherein the functional monomer is at least one of trimethylolpropane, pentaerythritol, monoglyceride and unsaturated fatty acid. The automobile water-based floating coat prepared fromthe water-based polyurethane resin has excellent stone beating resistance and paint film hardness, and meanwhile, the prepared automobile water-based colored paint has excellent adhesive force and flexibility, is high in comprehensive performance and can meet the requirements of a higher coating process in the field of automobiles.

Description

technical field [0001] The invention belongs to the technical field of water-based coatings, in particular to a water-based polyurethane resin and its preparation method and application. Background technique [0002] With the continuous development of the economy, people's demand for cars is increasing year by year. The supporting coating industry has also achieved long-term development. However, with the rapid development of automotive coatings, it also has a huge impact on the environment. In order to protect the ecological environment, laws and regulations related to automobile painting have been promulgated one after another. my country puts forward the VOC emission requirement ≤40g / m in "Clean Production Standards for Automobile Manufacturing (Painting)" 2 , which has led to the rapid development of water-based coatings. In order to reduce the amount of paint used and the energy consumption of painting, the painting process is constantly updated, from the water-base...

Claims

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Application Information

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IPC IPC(8): C08G18/76C08G18/75C08G18/73C08G18/66C08G18/44C08G18/42C08G18/48C08G18/32C08G18/36C08G18/12C09D175/04C09D175/14
CPCC08G18/44C08G18/348C08G18/6659C08G18/755C08G18/12C08G18/0823C08G18/42C08G18/3855C08G18/6633C08G18/7671C08G18/73C08G18/724C08G18/7614C08G18/4825C08G18/4018C09D175/04C09D175/14C08G18/3206C08G18/36
Inventor 王璐王明晶
Owner 中山大桥化工集团有限公司
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