Water-dispersible polyurethane polymer

Patent metadata

Field	Value
Publication number	US-9873760-B2
Application number	US-201514699613-A
Country	US
Kind code	B2
Filing date	Apr 29, 2015
Priority date	Jul 5, 2006
Publication date	Jan 23, 2018
Grant date	Jan 23, 2018

Abstract

A water-dispersible polyurethane polymer useful in coating applications preferably includes a backbone having urethane linkages and at least one cycloaliphatic group having a closed aliphatic ring structure. Ethylenically unsaturated groups are preferably provided on the polyurethane polymer.

First claim

The invention claimed is:

1. A water-dispersible polyurethane polymer comprising:
a plurality of urethane linkages;
a plurality of cycloaliphatic groups derived from cycloaliphatic diacids;
a plurality of salt or salt-forming groups; and
a plurality of air-curable ethylenically unsaturated groups, wherein a combined concentration of the plurality of cycloaliphatic groups and the plurality of air-curable ethylenically unsaturated groups constitutes at least about 30 percent by weight of the polyurethane polymer, based on a total dry weight of the polyurethane polymer, and at least 20 percent by weight of the plurality of cycloaliphatic groups and the plurality of air-curable ethylenically unsaturated groups are provided by alkyd-based polyols,

wherein the polyurethane is dispersible in water without requiring the use of a separate surfactant.

2. The polyurethane polymer of claim 1 , wherein at least one of the plurality of cycloaliphatic groups comprises a structure X—Z—X, and wherein:
Z is an aliphatic ring structure;
each X is a group independently selected from an ester group, an ether group, an amide group, a carbonate group, hydrogen, or CRn, where R is independently selected from hydrogen, a halogen, oxygen, nitrogen, an organic group, or a combination thereof and n is 0, 1 or 2; and
at least one of the X groups is a divalent linkage group that attaches the at least one cycloaliphatic group to another portion of the polyurethane polymer.

3. The polyurethane polymer of claim 2 , wherein Z comprises a divalent aliphatic ring structure and the X groups comprise divalent linkage groups that attach the at least one cycloaliphatic group to other portions of the polymer.

4. The polyurethane polymer of claim 1 , wherein the plurality of cycloaliphatic groups are located on a backbone of the polyurethane polymer.

5. The polyurethane polymer of claim 1 , wherein the plurality of cycloaliphatic groups constitute at least about 4 percent by weight of the polyurethane polymer, based on the total dry weight of the polyurethane polymer.

6. The polyurethane polymer of claim 1 , wherein the plurality of air-curable ethylenically unsaturated groups constitute at least about 15 percent by weight of the polyurethane polymer, based on the total dry weight of the polyurethane polymer.

7. The polyurethane polymer of claim 1 , wherein a ratio of the plurality of urethane linkages to the plurality of cycloaliphatic groups in the polyurethane polymer includes less than about 8:1.

Assignees

• Valspar Sourcing Inc

Inventors

• Killilea T Howard
• Springate Robert William

Classifications

• C08G18/3203

  Polyhydroxy compounds · CPC title

• C08G18/12

  using two or more compounds having active hydrogen in the first polymerisation step · CPC title

• C08G18/305

  creating amino end groups · CPC title

• C08G18/3228

  acyclic · CPC title

• C08G18/68

  Unsaturated polyesters · CPC title