US 2006/0149020 A1 · Polyurethane dispersion (PUD) with improved isopropanol resistance, flexibility and softness

Abstract

Isocyanate-functional polyurethane prepolymers and aqueous dispersions therefrom which are useful for the production of flat materials having excellent resistance to alcoholic solvents are described. The prepolymers are prepared by reacting A) an isocyanate selected from the group consisting of i) an aliphatic and/or a cycloaliphatic isocyanate; and ii) a mixture of an aromatic isocyanate and an aliphatic and/or a cycloaliphatic isocyanate; and B) a polyester diol having a number average molecular weight of 800 to 4,000 and a polyether triol having a number average molecular weight of 200 to 3,000.

Claims14

Dependent claims

A polyurethane prepolymer having an NCO content of from about 1 to about 6% by weight, prepared by reacting:

A) an isocyanate selected from the group consisting of
i) an aliphatic and/or a cycloaliphatic isocyanate;
and
ii) a mixture of an aromatic isocyanate and an aliphatic and/or a cycloaliphatic isocyanate;
and
B) a polyester diol having a number average molecular weight of 800 to 4,000 and a polyether triol having a number average molecular weight of 200 to 3,000.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application

11/334,987Filed 19 Jan 2006

Priority

21 Apr 2003

Published

6 Jul 2006

Term ends

Not estimatedThe source records don’t support an estimate.

Classification17 codes

C08G 18/0823
Containing anionic or anionogenic groups: containing carboxylate salt groups or groups forming them
C08G 18/0819
Manufacture of polymers containing ionic or ionogenic groups: containing anionic or anionogenic groups
C08G 18/0828
Containing anionic or anionogenic groups: containing sulfonate groups or groups forming them
C08G 18/10
Processes: prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step

Family

Application10/419,584Continuation in part · filed 21 Apr 2003

Application10/677,882Continuation in part · filed 2 Oct 2003

Application11/334,987Continuation in part · filed 19 Jan 2006

US 2004/0210026 A1Published application

US 7,045,573 B2Related patent

US 2006/0149020 A1This patent

From the US filing history. Foreign family members aren’t listed.

Polyurethane dispersion (PUD) with improved isopropanol resistance, flexibility and softness

Life of this patent

Polyurethane dispersion (PUD) with improved isopropanol resistance, flexibility and softness

Life of this patent

Abstract

Claims14