Aqueous polyurethane dispersion

Patent metadata

Field	Value
Publication number	US-2016333155-A1
Application number	US-201315165514-A
Country	US
Kind code	A1
Filing date	Dec 3, 2013
Priority date	Dec 3, 2013
Publication date	Nov 17, 2016
Grant date	—

Abstract

Provided is an aqueous composition comprising dispersed particles that comprise a polyurethane, wherein said polyurethane is a reaction product of a group of reactants (GR1), wherein GR1 comprises one or more aromatic polyisocyanates and, a polyol component, wherein said polyol component comprises
(a) 50% to 99% by weight, based on the weight of said polyol component, one or more polyester polyols, (b) 0.1% to 10% by weight, based on the weight of said polyol component, one or more diols having a hydrophilic side chain, and (c) 0.9% to 40% by weight, based on the weight of said polyol component, one or more polyols different from (a) and (b).

Also provided is a method of bonding a metal foil to a polymer film using such an aqueous composition.

First claim

1 . An aqueous composition comprising one or more anionic surfactants and further comprising dispersed particles that comprise a polyurethane, wherein said polyurethane is a reaction product of a group of reactants (GR1), wherein GR1 comprises one or more aromatic polyisocyanates and a polyol component, wherein said polyol component comprises
(a) 50% to 99% by weight, based on the weight of said polyol component, one or more polyester polyols, (b) 0.1% to 10% by weight, based on the weight of said polyol component, one or more diols having a hydrophilic side chain, and (c) 0.9% to 40% by weight, based on the weight of said polyol component, one or more polyols different from (a) and (b).

2 . The composition of claim 1 , wherein (c) comprises 2% to 20% by weight, based on the weight of said polyol component, one or more polyethylene glycols.

3 . The composition of claim 2 , wherein the total amount in said polyol component of polyether polyols that are not said polyethylene glycols and that are not said diols having a hydrophilic side chain is, by weight based on the total weight of said polyol component, 20% or less.

4 . The composition of claim 1 , wherein (c) comprises 0.5% to 5% by weight, based on the weight of said polyol component, one or more monomeric diols.

5 . The composition of claim 1 , wherein said polyester polyol (a) comprises one or more aliphatic polyester polyols.

6 . The composition of claim 1 , wherein said GR1 additionally comprises one or more polyamines.

7 . The composition of claim 1 , wherein said composition additionally comprises one or more isocyanate crosslinker.

8 . The composition of claim 7 , wherein said isocyanate crosslinker comprises one or more hydrophilically modified trimers of monomeric diisocyanates.

9 . An aqueous composition comprising dispersed particles that comprise a polyurethane, wherein said polyurethane is a reaction product of a group of reactants (GR1), wherein GR1 comprises one or more aromatic polyisocyanates and, a polyol component, wherein said polyol component comprises
(a) 50% to 99% by weight, based on the weight of said polyol component, one or more polyester polyols, (b) 0.1% to 10% by weight, based on the weight of said polyol component, one or more diols having a hydrophilic side chain, wherein said hydrophilic side chain comprises one or more anionic group; and (c) 0.9% to 40% by weight, based on the weight of said polyol component, one or more polyols different from (a) and (b).

10 . A method of bonding a metal foil to a polymeric film comprising the steps of
(A) applying a layer of the composition of claim 1 to a surface of said metal foil, (B) drying said layer of said adhesive composition to produce a layer of dried adhesive, and (C) after said drying, bringing a surface of a polymeric film into contact with said layer of said dried adhesive composition.

Assignees

• Rohm & Haas
• Dow Global Technologies Llc

Inventors

• Bai Chenyan
• Qu Zhaohui
• Zhang Hong Liang
• Bhattacharjee Debkumar

Classifications

• B32B37/12 Primary

  characterised by using adhesives · CPC title

• C08G18/4833 Primary

  Polyethers containing oxyethylene units · CPC title

• C08G18/6607

  with compounds of group C08G18/3203 · CPC title

• C08G18/3206

  aliphatic · CPC title

• C08L75/08

  from polyethers · CPC title