Title:
AQUEOUS DISPERSION OF POLYURETHANE RESIN, AND WATER-BASED PAINT
Document Type and Number:
WIPO Patent Application WO/2024/070396
Kind Code:
A1
Abstract:
Provided is an aqueous dispersion of a polyurethane resin having reduced viscosity and improved storage stability and capable of forming a coating film with improved heat resistance. An aqueous dispersion of a polyurethane resin according to an embodiment is obtained by reacting a polyol (A), a polyisocyanate (B) and a chain extender (C). The polyol (A) contains an aromatic polyester polyol (A1) and an aliphatic diol (A2) having a hydrocarbon group in a side chain thereof. The chain extender (C) contains a compound (C1) having three primary and/or secondary amino groups and no hydroxyl groups, and a compound (C2) having one or more hydroxyl groups and two or more primary and/or secondary amino groups. The acid value is 11.0-23.0 mgKOH/g, and the hydroxyl value is 8.0-23.0 mgKOH/g.
Inventors:
KANEKO FUMIYA (JP)
NISHIMURA TAKUMA (JP)
WATANABE TOSHIYA (JP)
NISHIMURA TAKUMA (JP)
WATANABE TOSHIYA (JP)
Application Number:
PCT/JP2023/031074
Publication Date:
April 04, 2024
Filing Date:
August 29, 2023
Export Citation:
Assignee:
DKS CO LTD (JP)
International Classes:
C08G18/00; C08G18/10; C08G18/32; C08G18/42; C08G18/66; C08G18/75; C09D5/02; C09D175/06
Foreign References:
| JP2005272590A | 2005-10-06 | |||
| JP2016084415A | 2016-05-19 | |||
| JP2018505254A | 2018-02-22 |
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