Rigid polyurethane foams

Patent metadata

Field	Value
Publication number	US-9353234-B2
Application number	US-201313780508-A
Country	US
Kind code	B2
Filing date	Feb 28, 2013
Priority date	Mar 1, 2012
Publication date	May 31, 2016
Grant date	May 31, 2016

Abstract

The invention relates to rigid polyurethane foams obtainable by reaction of
A) organic or modified organic polyisocyanates or mixtures thereof, B) compounds having two or more isocyanate-reactive hydrogen atoms in the presence of C) optionally further polyester polyols, D) optionally polyetherol polyols, E) optionally flame retardants, F) one or more blowing agents, G) catalysts, and H) optionally further auxiliaries and/or additives, wherein component B) comprises the reaction product of a1) 15 to 40 wt % of one or more polyols or polyamines having an average functionality of 2.5 to 8, a2) 2 to 30 wt % of one or more fatty acids and/or fatty acid monoesters, a3) 35 to 70 wt % of one or more alkylene oxides of 2 to 4 carbon atoms.

First claim

We claim:

1. A rigid polyurethane foam obtained by reaction of a reactant mixture comprising:
A) an organic or modified organic polyisocyanate;
B) a polyetherester polyol having two or more isocyanate-reactive hydrogen atoms;
C) optionally, a polyester polyol; and
D) optionally, a polyetherol polyol; in the presence of
E) optionally, a flame retardant,
F) a blowing agent, and
G) a catalyst, wherein
the polyetherester polyol B) is a reaction product of components, comprising:
a1) 15 to 40 wt % of water or a polyol or a polyamine, the polyol or polyamine having an average functionality of 2.5 to 8,
a2) 2 to 30 wt % of a fatty acid or fatty acid monoester, and
a3) 50 to 70 wt % of an alkylene oxide having 2 to 4 carbon atoms,
wherein the polyetherester polyol B) is obtained by initially preparing a mixture comprising a1) the water, the polyol or the polyamine and a2) the fatty acid or the fatty acid monoester in a reactor, inertizing the reactor and adding a3) the alkylene oxide to the inertized reactor.

2. The rigid polyurethane foam according to claim 1 wherein the component a1) comprises at least one selected from the group consisting of a sugar, pentaerythritol, sorbitol, trimethylolpropane, glycerol, tolylenediamine, ethylenediamine, ethylene glycol, propylene glycol and water.

3. The rigid polyurethane foam according to claim 2 wherein component a1) comprises glycerol and sucrose.

4. The rigid polyurethane foam according to claim 2 wherein component a2) comprises oleic acid or an oleic acid derivative.

5. The rigid polyurethane foam according to claim 1 wherein component a3) is propylene oxide.

6. The rigid polyurethane foam according to claim 1 wherein an OH number of the polyetherester polyol B) is from 200 to 700 mg KOH/g.

7. The rigid polyurethane foam according to claim 1 wherein a functionality of the polyetherester polyol B) is from 2.5 to 8.

8. The rigid polyurethane foam according to claim 1 wherein the polyether polyol D) is present and the polyether polyol is a propoxylated ethylenediamine.

9. The rigid polyurethane foam according to claim 1 wherein the polyether polyol D) is present and the polyether polyol is a propoxylated polyol of a mixture of glycerol and sucrose.

10. A process for producing the rigid polyurethane foam of claim 1 , the process comprising:
reacting the organic or modified organic polyisocyanate A) with the polyetherester polyol B) and optionally the polyester polyol C), and optionally, the polyetherol polyol D);
wherein
the reaction is conducted in the presence of the blowing agent F), and the catalyst G).

11. A polyol mixture comprising: a polyetherester polyol B);
optionally, a polyester polyol C);
optionally, a polyetherol polyol D);
a blowing agent F);
a catalyst G); and
optionally, a flame retardant E);
wherein
the polyetherester polyol B) is a reaction product of components, comprising:
a1) 15 to 40 wt % of water or a polyol or a polyamine, the polyol or polyamine having an average functionality of 2 to 8,
a2) 2 to 30 wt % of a fatty acid or fatty acid monoester, and
a3) 50 to 70 wt % of an alkylene oxides having 2 to 4 carbon atoms,

wherein the polyetherester polyol B) is obtained by initially preparing a mixture comprising a1) the water, the polyol or the polyamine and a2) the fatty acid or the fatty acid monoester in a reactor, inertizing the reactor and adding a3) the alkylene oxide to the inertized reactor.

12. The polyol mixture according to claim 11 , comprising:
25 to 90 wt % of the polyetherester polyol B);
0 to 20 wt % of the polyester polyol C);
0 to 35 wt % of the polyether polyol D);
0 to 30 wt % of the flame retardant E);
1 to 40 wt % of the blowing agent F);
0.001 to 5 wt % of catalysts the catalyst G).

13. The rigid polyurethane foam of claim 1 , wherein the reaction mixture further comprises an auxiliary or additive H), that is selected from the group consisting of a surface-active substance, a foam stabilizer, a cell regulator, a filler, a dye, a pigment, a hydrolysis inhibitor, a fungistatic substance and a bacteriostatic substance.

14. The process for producing a polyurethane foam of claim 10 , wherein the reaction mixture further comprises an auxiliary or additive H), that is selected from the group consisting of a surface-active substance, a foam stabilizer, a cell regulator, a filler, a dye, a pigment, a hydrolysis inhibitor, a fungistatic substance and a bacteriostatic substance.

15. The polyol mixture of claim 11 , further comprising an auxiliary or additive H), that is selected from the group consisting of a surface-active substance, a foam stabilizer, a cell regulator, a filler, a dye, a pigment, a hydrolysis inhibitor, a fungistatic substance and a bacteriostatic substance.

16. The rigid polyurethane foam of claim 1 , wherein component a2) consists of a fatty acid monoester.

17. The rigid polyurethane foam of claim 1 , wherein component a2) is biodiesel.

18. The rigid polyurethane foam of claim 16 , wherein component a2) is methyl oleate.

19. The rigid polyurethane foam of claim 1 , wherein the polyetherester polyol B) is a reaction product of components, consisting of:
a1) 15 to 40 wt % of water or a polyol or a polyamine, the polyol or polyamine having an average functionality of 2.5 to 8,
a2) 2 to 30 wt % of a fatty acid or fatty acid monoester, and
a3) 50 to 70 wt % of an alkylene oxide having 2 to 4 carbon atoms,
wherein the polyetherester polyol B) is obtained by initially preparing a mixture comprising a1) the water, the polyol or the polyamine and a2) the fatty acid or the fatty acid monoester in a reactor, inertizing the reactor and adding a3) the alkylene oxide to the inertized reactor.

Assignees

• Basf Se

Inventors

• Jacobmeier Olaf
• Kampf Gunnar
• Koenig Christian

Classifications

• C08G18/4891 Primary

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

• C08G18/6688

  with compounds of group C08G18/3271 · CPC title

• C08G18/3284

  containing four hydroxy groups · CPC title

• C08G2101/0083

  Chemistry & Metallurgy · mapped topic

• C08J9/04 Primary

  using blowing gases generated by a previously added blowing agent · CPC title