Mixtures containing polytetrahydrofuran and a stabiliser

• US 7,579,393 B2
• Filed: 12/30/2004
• Issued: 08/25/2009
• Est. Priority Date: 01/14/2004
• Status: Active Grant

• Current Assignee: BASF AG (BASF SE)
• Original Assignee: BASF AG (BASF SE)
• Inventors: Graf, Hermann, Malz, Hauke, Rodewald, Dieter
• Primary Examiner(s): SANDERS, KRIELLION ANTIONETTE
• Application Number:
  US10/584,767
• Publication Number:
  US 20070129487A1
• Time in Patent Office: 1,699 Days
• Field of Search: 524/113, 524/291, 524/589, 528/48, 528/85, 252/182.19, 252/182.24
• US Class Current: 524/113
• CPC Class Codes: C08G 18/4808 Mixtures of two or more polyetherdiols
• CPC Class Codes: C08G 18/4854 Polyethers containing oxyalkylene groups having four carbon atoms in the alkylene group
• CPC Class Codes: C08G 18/4887 containing carboxylic ester groups derived from carboxylic acids other than acids of higher fatty oils or other than resin acids
• CPC Class Codes: C08G 2290/00 Compositions for creating anti-fogging
• CPC Class Codes: C08K 5/1345 Carboxylic esters of phenolcarboxylic acids
• CPC Class Codes: C08L 2666/14 Macromolecular compounds according to C08L59/00 - C08L87/00; Derivatives thereof
• CPC Class Codes: C08L 2666/18 Polyesters or polycarbonates according to C08L67/00 - C08L69/00; Derivatives thereof
• CPC Class Codes: C08L 71/02 Polyalkylene oxides
• CPC Class Codes: C08L 71/14 Furfuryl alcohol polymers

Abstract

The invention relates to mixtures (1) comprising (a) polytetrahydrofuran and (b) stabilizers having a molecular weight of from 600 g/mol to 10000 g/mol and comprising at least two phenolic groups.

Claims

1. A mixture comprising (a) polytetrahydrofuran and (b) and at least one stabilizer comprising at least two phenolic groups which are joined to one another by a polyol having a number average molecular weight of from around 500×

F g/mol to 1000×

F g/mol, wherein F is the number of the phenolic groups in the molecule.

2. The mixture according to claim 1, wherein the number average molecular weight (Mn) of the polyol is less than its weight average molecular weight (Mw).

4. The mixture according to claim 1, wherein the at least one stabilizer (b) is comprised in an amount of from 1 ppm to 5000 ppm, based on the total weight of the mixture.

5. The mixture according to claim 1, wherein the polytetrahydrofuran (a) has a molecular weight of from 200 g/mol to 10000 g/mol.

6. A process for producing a polyurethane, comprising reacting the mixture of claim 1 with at least one isocyanate to form the polyurethane.

10. The mixture of claim 1, wherein the polyol has a number average molecular weight of 500×

F g/mol, wherein F is the number of phenolic groups in the molecule.

3. A mixture (1) comprising (a) polytetrahydrofuran and at least one stabilizer (b), wherein the stabilizer (b) comprises at least one molecule selected from the group consisting of formula (X), formula (XX), and mixtures thereof,

7. The mixture of claim 3, wherein the at least one stabilizer (b) comprises at least one molecule of formula (X).

8. The mixture of claim 3, wherein the at least one stabilizer (b) comprises at least one molecule of formula (XX).

9. The mixture of claim 3, wherein the at least one stabilizer (b) comprises at least one molecule of formula (X) and at least one molecule of formula (XX).