Aqueous dispersion of polyurethane

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United States of America Patent

PATENT NO 11685805
APP PUB NO 20210130532A1
SERIAL NO

16468387

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Abstract

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The present invention relates to an aqueous dispersion of polyurethane and a method for preparing the same, use thereof in a coating composition, and a coated product. The aqueous dispersion of polyurethane comprises a polyurethane polymer which is obtained by a reaction of a reaction mixture comprising a polyurethane prepolymer A) and an isocyanate-reactive component B), said polyurethane prepolymer A) being obtained by a reaction comprising the following components: A1) a polyisocyanate which has a functionality of not less than 2; and A2) a multifunctional polyether polyol which has a functionality of not less than 3 in an amount of 1% to 30% by weight, based on the amount of said reaction mixture as 100% by weight. The aqueous dispersion of polyurethane according to the present invention is well dispersed, and is capable of forming a coat with good waterproof, moisture permeability and washing resistance.

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Patent Owner(s)

Patent OwnerAddress
COVESTRO DEUTSCHLAND AGLEVERKUSEN GERMANY LEVERKUSEN NORTH RHINE-WESTPHALIA

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Avtomonov, Evgeny Leverkusen, DE 16 13
Fan, Zhirong Jiangsu Province, CN 8 1
Irnich, Rolf Bergheim, DE 8 11
Zhai, Sujuan Shanghai, CN 2 0

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