Polyurethane reaction accelerator as well as preparation method and application thereof

A reaction accelerator, polyurethane technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of unfriendly production and users, achieve the effect of production and user friendliness, and reduce VOC content

Pending Publication Date: 2022-04-08
QINGYUAN HUAYUAN INST OF SCI & TECH COLLABORATIVE INNOVATION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The catalyst still uses nitrogen-containing compounds as the main active catalyst component, and its irritating odor is unavoidable, which is extremely unfriendly to production and users

Method used

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  • Polyurethane reaction accelerator as well as preparation method and application thereof
  • Polyurethane reaction accelerator as well as preparation method and application thereof
  • Polyurethane reaction accelerator as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The raw materials for the preparation of the polyurethane reaction accelerator in Example 1 of the present invention are 1,2-propanediol and methyl hexahydrophthalic anhydride. The specific preparation method is: add 76.1g (1mol) 1,2-propanediol and 168.2g ( 1mol) of methyl hexahydrophthalic anhydride, heated to 110°C, and reacted for 3 hours to obtain the reaction accelerator. The accelerator has a viscosity of 1220 mPa·s, an acid value of 229.8 mgKOH / g, and a hydroxyl content of 7.0%.

Embodiment 2

[0032] The raw materials for the preparation of the polyurethane reaction accelerator in Example 2 of the present invention are 1,2-butanediol and methyl hexahydrophthalic anhydride. The specific preparation method is: add 90.1g (1mol) 1,2-butanediol and 168.2 g (1mol) of methyl hexahydrophthalic anhydride, heated to 100°C, and reacted for 4 hours, the reaction accelerator can be obtained. The accelerator has a viscosity of 1540 mPa·s, an acid value of 217.5 mgKOH / g, and a hydroxyl content of 6.6%.

Embodiment 3

[0034] The raw materials for the preparation of the polyurethane reaction accelerator in Example 3 of the present invention are 1,2-pentanediol and methylhexahydrophthalic anhydride. The specific preparation method is: add 104.2g (1mol) 1,2-pentanediol and 168.2 g (1mol) of methyl hexahydrophthalic anhydride, heated to 120°C, and reacted for 2 hours, the reaction accelerator can be obtained. The accelerator has a viscosity of 1710 mPa·s, an acid value of 206.2 mgKOH / g, and a hydroxyl content of 6.2%.

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Abstract

The invention discloses a polyurethane reaction accelerator as well as a preparation method and application thereof, and belongs to the field of polyurethane catalysts. The polyurethane reaction accelerator is prepared by reacting a dihydroxy compound and methylhexahydrophthalic anhydride which are used as raw materials in a molar ratio of 1: 1 at 90-120 DEG C for 1-5 hours. Carboxyl contained in the reaction accelerator can remarkably accelerate the reaction speed of polyurethane, improve the drying speed of the polyurethane coating, meanwhile, the chemical resistance of a polymer is not affected, and the mechanical properties such as hardness of a polymer system are not reduced. In addition, the polyurethane coating also has low viscosity, and as a part of a film-forming substance, the solid content of the polyurethane coating is increased, the use amount of an organic solvent is reduced, and the emission of VOC is reduced. The acidic reaction accelerant does not contain heavy metal components, has no pungent smell, and can meet various harsh environmental protection requirements.

Description

technical field [0001] The invention belongs to the field of polyurethane catalysts, in particular to a polyurethane reaction accelerator and its preparation method and application. Background technique [0002] Two-component polyurethane coatings are high-end coatings with excellent hardness, flexibility, water resistance, and weather resistance. They are widely used in the coating of automobiles, rail trains, construction machinery, and wind power blades. The drying speed and VOC content of two-component polyurethane coatings are important issues of general concern in the industry, and are of great significance for energy saving, emission reduction, and improvement of coating efficiency. The use of catalysts is the main solution to speed up the drying speed of polyurethane coatings. Currently commonly used catalysts include organotin heavy metal compounds and organic amine compounds. Organotin compounds have excellent catalytic effects on polyurethane systems, but their ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/34C09D175/04
CPCC08G18/34C09D175/04
Inventor 马晓阳黎家强梁伟健郭逍遥吴燕如侯文俊
Owner QINGYUAN HUAYUAN INST OF SCI & TECH COLLABORATIVE INNOVATION CO LTD
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