Polyurethane dispersions
AssigneeCroda International PLC
InventorsWilhelmus Adrianus Jacobus Honcoop, Remco Benjamin Van Triet, Angela Leonarda Maria Smits
Life of this patent
Estimating the term…
Abstract
The present invention relates to a polyurethane dispersion comprising particles of a polyurethane dispersed in a dispersing medium, wherein the polyurethane is obtainable by reacting a polyol and an isocyanate, wherein the polyol comprises at least one dimer fatty residue selected from a dimer fatty diacid residue, a dimer fatty diol residue and a dimer fatty diamine residue; and at least one furan dicarboxylic acid residue. The invention also relates to a coating composition comprising the polyurethane dispersion, a polyol for making the polyurethane dispersion, the use of the polyol and a method of making the polyurethane.
Claims23
A polyurethane dispersion comprising particles of a polyurethane dispersed in a dispersing medium, wherein the polyurethane is obtainable by reacting a polyol and an isocyanate, wherein the polyol comprises:
- a) at least one dimer fatty diacid residue;
- b) at least one furan dicarboxylic acid residue;
- and
- c) at least 10 wt % of at least one residue of a C2 to C10 diol;
- wherein the weight ratio of dimer fatty diacid residue to furan dicarboxylic acid residue in the polyol is at least 1:1 and at most 20:1,
- wherein the polyol does not comprise a dimer fatty diol residue.
A polyol, wherein the polyol comprises:
- a) at least one dimer fatty diacid residue;
- b) at least one furan dicarboxylic acid residue;
- and
- c) at least 10 wt % of at least one residue of a C2 to C10 diol;
- wherein the weight ratio of dimer fatty diacid residue to furan dicarboxylic acid residue in the polyol is at least 4:1 and at most 20:1, and
- wherein the polyol does not comprise a dimer fatty diol residue.
Dependencies are inferred from the claim text.