Aqueous urethane resin composition

• US 9,499,654 B2
• Filed: 12/20/2012
• Issued: 11/22/2016
• Est. Priority Date: 12/27/2011
• Status: Active Grant

• Current Assignee: Bayer Materialscience AG (Covestro AG)
• Original Assignee: Covestro Deutschland AG
• Inventors: Morita, Hiroshi, Nakao, Makoto
• Primary Examiner(s): Salvitti, Michael A
• Application Number:
  US14/367,009
• Publication Number:
  US 20140378611A1
• Time in Patent Office: 1,433 Days
• US Class Current: 1/1
• CPC Class Codes: C08G 18/3821 Carboxylic acids; Esters thereof with monohydroxyl compounds
• CPC Class Codes: C08G 18/6245 Polymers having terminal groups containing active hydrogen
• CPC Class Codes: C08G 18/6254 Polymers of alpha-beta ethylenically unsaturated carboxylic acids and of esters of these acids containing hydroxy groups
• CPC Class Codes: C08G 18/6529 Compounds of group C08G18/3225 or polyamines of C08G18/38
• CPC Class Codes: C08G 18/706 the liquid medium being water
• CPC Class Codes: C08G 18/73 acyclic
• CPC Class Codes: C08G 18/792 formed by oligomerisation of aliphatic and/or cycloaliphatic isocyanates or isothiocyanates
• CPC Class Codes: C08K 3/20 Oxides; Hydroxides graphene oxides C08K3/042
• CPC Class Codes: C09D 175/12 from compounds containing nitrogen and active hydrogen, the nitrogen atom not being part of an isocyanate group

Abstract

To provide an aqueous urethane resin composition with high reactivity, excellent drying characteristics, and the like, even under low-temperature environment.

Provided is an aqueous urethane resin composition consisting mainly of the following (A) component and containing the following (B) and (C) components:

(A) Hydrophilic polyol,

(B) Water dispersible polyisocyanate,

(C) Aspartic acid ester having a secondary amino group

Claims

1. An aqueous resin composition comprising as separate components:

(A) a hydrophilic polyol,

(B) a water dispersible polyisocyanate, and

(C) an aspartic acid ester having a secondary amino group of formula (1)

2. The aqueous resin composition of claim 1, wherein the water dispersible polyisocyanate (B) is at least one polyisocyanate having a hydrophilic group or a polyisocyanate not having a hydrophilic group but having a viscosity of 2000 mPa·

s/25°

C. or less.

3. The aqueous resin composition of claim 1, wherein an NCO index is in a range of 1.2 to 1.6.

4. The aqueous resin composition of claim 1, wherein the hydrophilic polyol (A) is a polyol containing an anionic group.

5. The aqueous resin composition of claim 1, wherein the aqueous urethane resin composition is a two component composition with a base resin comprising the hydrophilic polyol (A) and containing aspartic acid ester having a secondary amino group (C), and a hardener comprising the water dispersible polyisocyanate (B).

6. A paint, an adhesive or a sealant comprising the aqueous urethane resin composition of claim 1.