Polyurethane coating and preparation method thereof

A technology of polyurethane coatings and fatty acid esters, applied in polyurea/polyurethane coatings, coatings, etc., can solve the problems that coatings cannot actively degrade harmful gases, coating performance degradation, environmental pollution, etc.

Active Publication Date: 2011-03-16
JIANGSU KAOPULE NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the preparation of water-based polyurethane coatings has solved the environmental pollution problem of polyurethane coatings, some performances of the resulting coatings have been reduced, and the coatings cannot actively degrade harmful gases in the environment

Method used

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  • Polyurethane coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Accurately weigh 2.4 grams of nano-titanium dioxide particles with a particle size of 16-20nm, add them to 12.1 ml of methanol under stirring, continue stirring for about 20 minutes, and then add 0.07 grams of ethylene glycol fatty acid with a hydrophilic-lipophilic balance value of 3.6 Ester Emcol EL-50, ultrasonic treatment for 30 minutes, to obtain surface-modified nano titanium dioxide. With the nano-titanium dioxide dispersion of gained surface modification in methanol, 60 grams of hydroxyl acrylic resin (TB60018P type, Xiamen Kangdilong company), 12 grams of toluene diisocyanate and 30 milliliters of butanone and xylene (volume ratio is 3: 1) The mixed solvent is mixed to obtain the polyurethane coating of the present invention.

[0042] The coating obtained by the polyurethane coating in Example 1 is normally without fine lines, the solvent wiping resistance is qualified, the pencil hardness is H, the impact resistance test is passed, the dry adhesion is grade 1,...

Embodiment 2

[0044] Accurately weigh 3.1 grams of nano-titanium dioxide particles with a particle size of 45-50nm, add it to 11.8 milliliters of ethanol under stirring, continue to stir for about 20 minutes, then add 0.12 grams of polyoxyethylene sorbitol with a hydrophilic-lipophilic balance value of 4.0 Arias G-1727, a beeswax derivative, was sonicated for 1 hour, filtered, washed with 6 ml of ethanol, and dried under reduced pressure at a temperature of 60° C. for 24 hours to obtain 3.22 grams of surface-modified nano titanium dioxide. Nano titanium dioxide of gained surface modification, 62 grams of hydroxyl alkyd resins (number average molecular weight 250000, Dalian Boxiang Industry and Trade Co., Ltd.), 7.7 grams of toluene diisocyanate and 29 milliliters of butanone and xylene (volume ratio is 3: 1 ) mixed solvent to obtain the polyurethane coating of the present invention.

[0045] The coating obtained by the polyurethane coating in Example 2 is normally free of fine lines, the so...

Embodiment 3

[0047] Accurately weigh 3.48 grams of nano-titanium dioxide particles with a particle size of 70-80nm, add them to 26.6 milliliters of isopropanol under stirring, continue stirring for about 20 minutes, and then add 0.21 grams of diethylene glycol with a hydrophilic-lipophilic balance value of 4.7 Alcohol fatty acid ester Emcol DO-50, sonicated for 2 hours, filtered, washed with 13 ml of isopropanol, and dried under reduced pressure at 60° C. for 24 hours to obtain 3.69 grams of surface-modified nano titanium dioxide. Nano titanium dioxide of gained surface modification, 58 grams of polyester polyols (100 types, Liaoyang Dongchen Polyurethane Co., Ltd.), 13.8 grams of diphenylmethane diisocyanate and 28 milliliters of butanone and xylene (volume ratio is 3: 1 ) mixed solvent to obtain the polyurethane coating of the present invention.

[0048] The coating obtained by the polyurethane coating of Example 3 is normally without fine lines, the solvent wiping resistance is qualifie...

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Abstract

The invention provides a polyurethane coating, which comprises the following components: A) surface-modified nanometer titania, B) polyalcohol and C) isocyanate, wherein the surface-modified nanometer titania consists of nanometer titania particles serving as a matrix and a nonionic surfactant which is coated on the surface of the nanometer titania matrix; the grain size of the nanometer titania matrix is 1 to 100nm; the hydrophilic-lipophilic balance value of the nonionic surfactant is 1 to 10; the nonionic surfactant is 1 to 20 percent based on the weight of the nanometer titania matrix; the surface-modified nanometer titania is 2 to 15 percent based on the weight of the polyalcohol; and the weight ratio of the polyalcohol to the isocyanate is 10:1-2:1. The invention also provides a method for preparing the polyurethane coating.

Description

technical field [0001] The present invention relates to polyurethane coatings, more particularly, to polyurethane coatings containing surface-modified nano titanium dioxide. The present invention further relates to a preparation method of the polyurethane coating. Background technique [0002] Polyurethane resin is a polymer material with high strength, tear resistance and high wear resistance, which is widely used in daily life, agricultural production and medical treatment. Polyurethane resins are also widely used in the coatings industry, and the polyurethane coatings made of them can be divided into two categories: two-component polyurethane coatings and one-component polyurethane coatings. Two-component polyurethane coatings generally consist of curing agents and polyols. There are many types of polyurethane coatings, and the application fields are also very wide. Two-component polyurethane coatings are generally oil-based coatings with good mechanical properties and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D7/12C09D175/06C09D175/08
Inventor 于义龙徐瑞芬马卓尔
Owner JIANGSU KAOPULE NEW MATERIALS
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