Additives for improving polyurethane foam performance

Patent metadata

Field	Value
Publication number	US-10119002-B2
Application number	US-201113178558-A
Country	US
Kind code	B2
Filing date	Jul 8, 2011
Priority date	Jul 9, 2010
Publication date	Nov 6, 2018
Grant date	Nov 6, 2018

Abstract

Polyurethane foam compositions and processes to make flexible polyurethane foams are disclosed. Polyurethane foam is produced in the presence of additives comprising guanidine derivatives. Improvements in physical properties such as air flow, dimensional stability, tensile, tear, elongation and foam hardness is observed when these additives are present in polyurethane formulations. In addition, these additives can minimize polymer degradation under humid ageing conditions resulting in foam products with better mechanical properties.

First claim

The invention claimed is:

1. A foam precursor comprising a combination of: at least one polyol, at least one blowing agent, at least one gelling catalyst, at least one blowing catalyst and a solution comprising cyanoguanidine and dimethyl sulfoxide wherein cyanoguanidine is present in the solution in an amount less than 2.0 pphp of the precursor.

2. The foam precursor of claim 1 wherein the polyol comprises at least one polyether polyol.

3. The foam precursor of claim 1 wherein the blowing agent comprises water.

4. The foam precursor of claim 1 further comprising at least one surfactant.

5. The foam precursor of claim 4 wherein the surfactant comprises at least one silicone surfactant.

6. The foam precursor of claim 1 wherein the amount of cyanoguanidine is less than about 1.0 PPHP.

7. The foam precursor of claim 1 further comprising at least one flame retardant.

8. The foam precursor of claim 7 wherein the catalyst comprises at least one tertiary amine.

9. The foam precursor of claim 1 further comprising at least one crosslinker.

10. The foam precursor of claim 1 wherein the gelling catalyst comprises at least one member selected from the group consisting of N,N-bis(3-dimethylaminopropyl)-N-isopropanolamine; N,N-dimethylaminoethyl-N′-methyl ethanolamine; N,N,N′-trimethylaminopropyl ethanolamine, N,N-dimethylethanolamine; N,N-dimethyl-N′,N′-2-hydroxy(propyl)-1,3-propylenediamine; dimethylaminopropylamine; (N,N-dimethylaminoethoxy)ethanol, methyl-hydroxy-ethyl-piperazine, bis(N,N-dimethyl-3-aminopropyl)amine, N,N-dimethylaminopropyl urea, N,N′-bis(3-dimethylaminopropyl) urea, bis(dimethylamino)-2-propanol, N-(3-aminopropyl)imidazole, N-(2-hydroxypropyl)imidazole, and N-(2-hydroxyethyl)imidazole.

11. The foam precursor of claim 10 wherein the blowing catalyst comprises at least one member selected from the group consisting of 2-[N-(dimethylaminoethoxyethyl)-N-methylamino]ethanol, dimethylaminoethoxyethanol and N,N,N′-trimethyl-N′-3-aminopropyl-bis(aminoethyl) ether.

12. The foam precursor of claim 10 wherein the gelling catalyst further comprises at least one member selected from the group consisting of diazabicyclooctane, tris(dimethyalminopropyl) amine, dimethylaminocyclohexylamine, 1,2-dimethylimidazole, 1-methylimidazole and bis(dimethylaminopropyl)-N-methylamine.

13. The foam precursor of claim 11 wherein the blowing catalyst further comprises at least one member selected from the group consisting of bis-dimethylaminoethyl ether, pentamethyldiethylenetriamine, hexamethyltriethylenetetramine, heptamethyltetraethylenepentamine; 2-[N-(dimethylaminoethoxyethyl)-N-methylamino]ethanol; alkoxylated polyamines; imidazole-boron compositions; and amino propyl-bis(amino-ethyl)ether compositions.

14. A foam precursor comprising a combination of: at least one polyol, at least one tertiary amine catalyst having isocyanate reactive groups selected from the group consisting of primary amine, secondary amine, hydroxyl, amide and urea; at least one crosslinker, at least one surfactant and a solution of at least one member selected from the group consisting of guanidine, guanidine hydrochloride salt, guanidine phosphate salts, guanidine sulfate salts, cyano guanidine, 1-acetylguanidine, nitroguanidine, 1-(o-tolyl)-biguanidine and mixtures thereof in a 30% solution of dimethyl sulfoxide, and wherein when the foam precursor is contacted with an isocyanate, a dimensionally stable flexible foam is produced without mechanical crushing.

Assignees

• Burdeniuc Juan Jesus
• Tobias James Douglas
• Keller Renee Jo
• Jeon You Moon
• Evonik Degussa Gmbh

Inventors

• Burdeniuc Juan Jesus
• Tobias James Douglas
• Keller Renee Jo
• Jeon You-Moon

Classifications

• C08G2101/005

  Chemistry & Metallurgy · mapped topic

• C08G18/1875

  containing ammonium salts or mixtures of secondary of tertiary amines and acids · CPC title

• C08G18/4841

  containing oxyethylene end groups · CPC title

• C08J2375/08

  from polyethers · CPC title

• C08G18/325 Primary

  containing secondary or tertiary amino groups (C08G18/3228, C08G18/3234, C08G18/3246 take precedence) · CPC title