Homogeneous extruded articles made from thermoplastically processable polyurethanes based on polyester diols formed from succinic acid and 1,3-propanediol

Patent metadata

Field	Value
Publication number	US-9458277-B2
Application number	US-201214348310-A
Country	US
Kind code	B2
Filing date	Sep 27, 2012
Priority date	Sep 30, 2011
Publication date	Oct 4, 2016
Grant date	Oct 4, 2016

Abstract

The present invention relates to homogeneous extruded articles made from thermoplastically processable polyurethanes based on polyester diols formed from succinic acid and 1,3-propanediol.

First claim

What is claimed is:

1. A method comprising preparing a thermoplastically processable polyurethane elastomer with hardness from 65 to 95 Shore A, determined in accordance with ISO 868, obtained from the components consisting of:
a) one or more substantially linear polyesterdiol with functionality from 1.8 to 2.2,
b) one or more organic diisocyanate,
c) one or more diol with a molar mass from 60 to 350 g/mol,
where the molar NCO:OH ratio is set at from 0.9:1 to 1.1:1,
and wherein the substantially linear polyesterdiol a) consists of succinic acid and of 1,3-propanediol and has an average molar mass of from 750 to 3500 g/mol.

2. An extruded item essentially consisting of a thermoplastically processable polyurethane elastomer with hardness from 65 to 95 Shore A, determined in accordance with ISO 868, obtained from the components consisting of:
a) one or more substantially linear polyesterdiol with functionality from 1.8 to 2.2,
b) one or more organic diisocyanate,
c) one or more diol with a molar mass from 60 to 350 g/mol,
where the molar NCO:OH ratio is set at from 0.9:1 to 1.1:1,
and wherein the substantially linear polyesterdiol a) consists of succinic acid and of 1,3-propanediol and has an average molar mass of from 750 to 3500 g/mol.

3. The extruded item as claimed in claim 2 , wherein at least one of components a) and c) has been produced entirely or to some extent biologically.

4. The extruded item as claimed in claim 2 , wherein the organic diisocyanate b) is selected from one or more isocyanates from the group consisting of diphenylmethane 4,4′-diisocyanate, isophorone diisocyanate, dicyclohexylmethane 4,4-diisocyanate, hexamethylene 1,6-diisocyanate, and naphthylene 1,5-diisocyanate.

5. The extruded item as claimed in claim 2 , wherein the diol c) is selected from the group consisting of 1,4-butanediol, 1,3-propanediol, ethylene 1,2-glycol, and 1,6-hexanediol.

6. The extruded item as claimed in claim 2 , wherein the succinic acid in the polyesterdiol is produced biologically by fermentation of carbohydrates.

7. The extruded item as claimed in claim 2 , wherein the 1,3-propanediol used in the polyesterdiol has been produced biologically via fermentation of carbohydrates.

8. The extruded item as claimed in claim 2 , wherein the diol comprises a biologically produced 1,3-propanediol.

9. A process for the production of an extruded item as claimed in claim 2 comprising extruding the thermoplastically processable polyurethane elastomers with hardness from 65 to 95 Shore A, determined in accordance with ISO 868, obtained from the components consisting of:
a) one or more substantially linear polyesterdiols with functionality from 1.8 to 2.2,
b) one or more organic diisocyanates,
c) one or more diols with molar masses from 60 to 350 g/mol,
where the molar NCO:OH ratio is set at from 0.9:1 to 1.1:1,
and wherein the substantially linear polyesterdiols a) consists of succinic acid and of 1,3-propanediol and have an average molar mass of from 750 to 3500 g/mol.

Assignees

• Bayer Ip Gmbh
• Covestro Deutschland Ag

Inventors

• BRäUER WOLFGANG
• Shen Yi
• Kaufhold Wolfgang
• Nefzger Hartmut

Classifications

• C08G18/10

  Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step · CPC title

• C08G18/341 Primary

  Dicarboxylic acids, esters of polycarboxylic acids containing two carboxylic acid groups · CPC title

• C08G18/6633

  Compounds of group C08G18/42 · CPC title

• C08G18/4238

  derived from dicarboxylic acids and dialcohols · CPC title

• C08G2/10

  Polymerisation of cyclic oligomers of formaldehyde · CPC title