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Waterborne polyurethane dispersion, coating composition and application thereof

A technology of water-based polyurethane and dispersion, which is applied in polyurea/polyurethane coatings, coatings, textiles and papermaking, and can solve the problems of waterproof performance, moisture permeability and water washing resistance, moisture permeability and waterproof and water washing resistance Performance can not be both problems, to achieve the effect of improving moisture permeability

Pending Publication Date: 2022-05-06
ETERNAL CHEM (CHINA) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the water-based polyurethane dispersion has the advantages of the aforementioned solvent reduction, in the hydrophilic mechanism, the water-based polyurethane coating is easily hydrolyzed due to the hydrophilic functional group. Moisture permeability and water washing resistance are still slightly insufficient, and moisture permeability, waterproof and water washing resistance are often not compatible

Method used

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  • Waterborne polyurethane dispersion, coating composition and application thereof
  • Waterborne polyurethane dispersion, coating composition and application thereof
  • Waterborne polyurethane dispersion, coating composition and application thereof

Examples

Experimental program
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Effect test

manufacture example

[0097] Add 161g of monopentaerythritol and 606g of phthalic anhydride into a four-necked bottle, then add 839g of glycidyl tertiary carbonate dropwise at 150°C, and react for 5 hours to obtain a polyfunctional polyester polyol (C). The average molecular weight is about 1500 g / mole and the solids content is 98% by weight.

[0098] Manufacture of Waterborne Polyurethane Dispersions

Embodiment 1

[0100]Here, the amount of each reaction component used is based on the solid content of the aqueous polyurethane dispersion being 100% by weight. Under nitrogen, the polyester diol (B1) of 19.20 weight percent (manufactured by Changxing Material Industry Co., Ltd., model is 5650-1000, and molecular weight is 1000), the polyether diol (B2) of 30.98 weight percent (polytetramethylene ether glycol (PTMEG) manufactured by Dalian Chemical Industry Co., Ltd., the model is 2000, and the molecular weight is about 2000), 3.05 weight percent of polyfunctional polyester polyol (C), 5.20 weight percent of Sulfonate dibasic alcohol (D) (manufactured by G Ntechnology company, model is GS-7Q, and molecular weight is 420 g / mol) and the side chain of 13.31 weight percent has the dibasic alcohol compound (E ) (manufactured by Perstorp Company, model is Ymer N120, and the molecular weight is 1000 g / mol) after mixing, heated to 120° C., and kept at 120° C. for 2 hours to remove water.

[0101] T...

Embodiment 2 to 8 and comparative example 1 to 5

[0105] Embodiments 2 to 8 and Comparative Examples 1 to 5 are carried out in the same manner as in Example 1, except that polyisocyanate (A), diol compound (B), polyfunctional polyester polyol (C), sulfonate The usage-amount of salt diol (D), the diol compound (E) which has a polyethylene oxide group in a side chain, and a polyamine compound (F). The specific conditions about Examples 2 to 8 and Comparative Examples 1 to 5 are shown in Table 1.

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Abstract

The invention relates to a waterborne polyurethane dispersion, a coating composition, a waterproof moisture-permeable coating and application thereof. The aqueous polyurethane dispersion comprises a structural unit derived from the following compounds: a polyisocyanate (A), a diol compound (B), a multifunctional polyester polyol (C) and a sulfonate diol (D). The diol compound (B) contains a polyester diol (B1) and / or a polyether diol (B2). The invention also relates to a waterproof and moisture-permeable coating containing the aqueous polyurethane dispersion. The waterproof and moisture-permeable coating has good moisture permeability, water resistance and washing resistance.

Description

technical field [0001] The invention relates to a water-based polyurethane dispersion, a coating composition containing the water-based polyurethane dispersion and applications thereof, in particular to a water-based polyurethane dispersion suitable for waterproof and moisture-permeable coatings. Background technique [0002] In current waterproof products, the waterproof effect is generally achieved by attaching or coating a waterproof film on the substrate. However, to further improve users' evaluation, waterproof products are given a moisture-permeable function to allow accumulated moisture to escape. [0003] The principle of waterproof and moisture permeability includes microporous mechanism and hydrophilic mechanism. In the microporous mechanism, moisture (the size of gaseous water molecules is about 0.0004 microns) diffuses out through the micropores with a diameter of less than 2 microns on the coating, and thereby blocks liquid water molecules (about 100 microns in...

Claims

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Application Information

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IPC IPC(8): C08G18/12C08G18/66C08G18/48C08G18/42C08G18/32C09D175/04D06N3/14D06N3/00
CPCC08G18/12C08G18/6618C08G18/4854C08G18/4238C08G18/4018C08G18/423C08G18/4202C08G18/3855C08G18/4833C08G18/4808C09D175/04D06N3/146D06N3/0034D06N2209/142D06N2209/126C08G18/3234
Inventor 许智雄龚毅钊卢彦彬戴睿霆
Owner ETERNAL CHEM (CHINA) CO LTD
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