Polyurethane elastomers

Patent metadata

Field	Value
Publication number	US-10501571-B2
Application number	US-201515117976-A
Country	US
Kind code	B2
Filing date	Feb 5, 2015
Priority date	Feb 14, 2014
Publication date	Dec 10, 2019
Grant date	Dec 10, 2019

Abstract

The present invention relates to a polyurethane elastomer obtainable by reacting a polyol and an isocyanate wherein the polyol comprises a) 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 b) at least one furan dicarboxylic acid residue. The invention also relates to a polyol for making the polyurethane elastomer, the use of the polyol and a method of making the polyurethane.

First claim

The invention claimed is:

1. A polyurethane elastomer obtainable by reacting a polyol and an isocyanate wherein the polyol comprises:
a) at least one dimer fatty residue selected from a dimer fatty diacid residue, a dimer fatty diol residue and a dimer fatty diamine residue;
b) at least one furan dicarboxylic acid residue; and
c) at least 10 wt % of at least one residue of a C 2 to C 10 diol based on the total weight of the polyol,
wherein the weight ratio of the at least one dimer fatty residue to the at least one furan dicarboxylic acid residue is at least 1:1 and at most 20:1 and
wherein the polyurethane elastomer is non-adhesive.

2. A polyurethane elastomer as claimed in claim 1 wherein the polyol comprises at least 20 wt % and at most 80 wt % of the at least one dimer fatty residue based on the total weight of the polyol.

3. A polyurethane elastomer as claimed in claim 1 wherein the polyol comprises at least 5 wt % and at most 40 wt % of the at least one furan dicarboxylic acid residue based on the total weight of the polyol.

4. A polyurethane elastomer as claimed in claim 1 wherein the weight ratio of dimer fatty residue to furan dicarboxylic acid residue in the polyol is at least 4:1 and at most 20:1.

5. A polyurethane elastomer as claimed in claim 1 wherein the polyol has a number average molecular weight of at least 500 and at most 5000.

6. A polyurethane elastomer as claimed in claim 1 wherein the polyol has a glass transition (Tg) temperature of at least −100° C. and at most −30° C.

7. A polyurethane elastomer as claimed in claim 1 wherein the polyol has a melting point (Tm) temperature of at most 80° C.

8. A polyurethane elastomer as claimed in claim 1 wherein the polyol comprises at least 10 wt % and at most 50 wt % of the at least one residue of a C 2 to C 10 diol based on the total weight of the polyol.

9. A polyurethane elastomer as claimed in claim 1 which further comprises a chain extender, wherein the chain extender is a diol.

10. A polyurethane elastomer as claimed in claim 1 wherein a surface of the elastomer has no adherent properties.

11. A polyurethane elastomer as claimed in claim 1 which has a tensile strength at break of at least 7 MPa when measured according to ISO 527-2.

12. A polyurethane elastomer as claimed in claim 1 which has a Shore A hardness of at least 60 when measured according to ISO 868.

13. A polyurethane elastomer as claimed in claim 1 which has a 100% modulus of at least 3 MPa when measured according to ISO 527-2.

14. A method of making a polyurethane elastomer comprising reacting a polyol with an isocyanate to form:
(i) the polyurethane elastomer; or
(ii) an isocyanate-terminated pre-polymer which is then reacted with a chain extender to form the polyurethane elastomer,

wherein the polyol comprises:
a) at least one dimer fatty residue selected from a dimer fatty diacid residue, a dimer fatty diol residue and a dimer fatty diamine residue;
b) at least one furan dicarboxylic acid residue; and
c) at least 10 wt % of at least one residue of a C 2 to C 10 diol based on the total weight of the polyol,
wherein the weight ratio of the at least one dimer fatty residue to the at least one furan dicarboxylic acid residue is at least 1:1 and at most 20:1 and
wherein the polyurethane elastomer is non-adhesive.

15. The method as claimed in claim 14 , wherein the polyurethane elastomer has no adherent properties.

Assignees

• Croda Int Plc

Inventors

• Honcoop Wilhelmus Adrianus Jacobus
• Triet Remco Benjamin Van
• Smits Angela Leonarda Maria

Classifications

• C08G18/686

  containing cycloaliphatic groups · CPC title

• C08G18/4233

  derived from polymerised higher fatty acids or alcohols · CPC title

• C08G18/4288

  modified by higher fatty oils or their acids or by resin acids · CPC title

• C08G63/553

  Acids or hydroxy compounds containing cycloaliphatic rings, e.g. Diels-Alder adducts · CPC title

• C08G18/664 Primary

  with compounds of group C08G18/3203 · CPC title