Polyester polyols with long-chain polyether polyol building blocks and use thereof in rigid pur/pir foams

Patent metadata

Field	Value
Publication number	US-2016039988-A1
Application number	US-201414782857-A
Country	US
Kind code	A1
Filing date	Apr 8, 2014
Priority date	Apr 11, 2013
Publication date	Feb 11, 2016
Grant date	—

Abstract

The invention relates to a polyester polyol which contains building units which are derived from ethylene glycol and/or diethylene glycol and which is characterized in that the polyester polyol furthermore comprises building units which are derived from at least one long-chain polyester polyol with a number-average molar mass of 1500 to 8000 Da. The invention further relates to a process for the production thereof and use thereof, in particular for the production of rigid PUR/PIR foams.

First claim

1 . A polyester polyol comprising structural units derived from ethylene glycol and/or diethylene glycol
and structural units derived from at least one long-chain polyether polyol having a number average molar mass of 1500 to 8000 Da.

2 . The polyester polyol of claim 1 , wherein the polyester polyol has a hydroxyl numbers of 150 to 300 mg KOH/g.

3 . The polyester polyol of claim 1 , wherein the polyester polyol has an OH functionality of 1.8 to 3.

4 . The polyester polyol of claim 1 , wherein the polyester polyol has from 50 to 100 mol % of primary hydroxyl end groups.

5 . The polyester polyol of claim 1 , wherein the long-chain polyether polyol has a number average molar mass of 1500 to 7000 Da.

6 . The polyester polyol of claim 1 , wherein the polyester polyol comprises structural units derived from an at least difunctional organic acid comprising glutaric acid, succinic acid, adipic acid, terephthalic acid, phthalic acid, isophthalic acid or a combinations thereof.

7 . The polyester polyol of claim 6 , wherein an aromatic fraction of the polyester polyol is from 0.0 to 50 wt %, and where a mixtures of glutaric acid, succinic acid, adipic acid and/or phthalic acid is used.

8 . The polyester polyol of claim 6 , wherein
(a) a proportion of polyester polyol structural units derived from the long-chain polyether polyol is from 1 to 50 wt % and/or (b) a proportion of polyester polyol structural units derived from ethylene glycol and/or diethylene glycol is from 10 to 70 wt %, and/or (c) a proportion of polyester polyol structural units derived from the at least difunctional organic acid is from 30 to 80 wt %.

9 . A method of preparing the polyester polyol of claim 6 , comprising reacting an at least difunctional organic acid with ethylene glycol and/or diethylene glycol and at least one long-chain polyether polyol having a number average molar mass of 1500 to 8000 Da, optionally in the presence of at least one catalyst.

10 . A method of using the polyester polyol of claim 6 comprising including the polyester polyol in a 1-phase polyol component of a two-component reaction system for producing rigid PUR/PIR foams, wherein the 1-phase polyol component is free from flame retardants.

11 . A reaction system for producing rigid PUR/PIR foams, comprising:
A) an organic polyisocyanate component, B) a polyol component, C) optionally auxiliary and added-substance materials and also blowing and co-blowing agent, wherein said organic polyisocyanate component A) and said polyol component B) are used in such a mixing ratio relative to each other as to produce an index of 100 to 500 wherein said polyol component B) comprises the polyester polyol of claim 1 .

12 . The reaction system of claim 11 , wherein the weight ratio between components B) and A) is from 100:150 to 100:300.

13 . A method of manufacturing a rigid PUR/PIR foams, which comprises mixing, and reacting said components A) and B) and also optionally C) of the reaction system of claim 11 .

14 . A rigid foam obtained by mixing and reacting said components A) and B) and also optionally C) of the reaction system of claim 11 .

15 . The rigid foam of claim 14 , wherein the rigid foam is in the form of an insulating panel or of a composite element having flexible or non-flexible outer layers and has a density of 25 to 65 kg/m 3 , or in the form of a slabstock foam and has a density of 25 to 300 kg/m 3 .

Assignees

• Bayer Materialscience Ag

Inventors

• Nefzger Hartmut
• Kuenzel Uwe
• Brassat Lutz

Classifications

• C08G18/7664 Primary

  containing alkylene polyphenyl groups · CPC title

• C08J2375/06

  from polyesters · CPC title

• C08J9/141 Primary

  Hydrocarbons · CPC title

• C08G18/4252

  derived from polyols containing polyether groups and polycarboxylic acids · CPC title

• C08G18/4018

  Mixtures of compounds of group C08G18/42 with compounds of group C08G18/48 · CPC title