Aldehyde scavengers mixtures for polyurethane foams

Patent metadata

Field	Value
Publication number	US-10696777-B2
Application number	US-201615183212-A
Country	US
Kind code	B2
Filing date	Jun 15, 2016
Priority date	Jun 16, 2015
Publication date	Jun 30, 2020
Grant date	Jun 30, 2020

Abstract

A polyurethane composition comprising a mixture comprising at least two aldehyde scavengers, a polyurethane product, and a process for making polyurethane foam are disclosed. The mixture of scavenger compounds can reduce, if not eliminate, the emissions of aldehydes from polyurethane foams. The scavenger compounds comprise at least one member selected from the group consisting of: phenol or substituted phenol, a 1,3-dicarbonyl compound, a polyamine bearing a 1,3-propanediamino function, melamine, a 1,2-diaminocycloalkane, an ammonium salt, and aminosiloxane.

First claim

The following is claimed:

1. A composition comprising a mixture of at least two aldehyde scavengers, at least one polyol, water and at least one amine catalyst; wherein the mixture of at least two aldehyde scavengers comprises at least one polyamine bearing a 1,3-propanediamino function; wherein the at least one polyamine is selected from the group consisting of N,N′-diphenylpropanediamine, 1-benzyl-1,3-propanediamine, isotridecyloxypropyl-1,3-diaminopropane, dodecyloxypropyl-1,3-diaminopropane, hexyloxypropyl-1,3-diaminopropane, N,N′,N″-tris-(3-aminopropyl)-4-aminopropyl-1,8-octanediamine, and N′-{2-[2-(3-amino-propylamino)-ethylaminoFethyl}-propane-1,3-diamine; wherein the mixture of the at least two aldehyde scavengers further comprises at least one member selected from the group consisting of phenol, substituted phenol compounds, a 1,3-dicarbonyl compound, melamine, a 1,2-diaminocycloalkane, and an ammonium salt; and wherein the mixture of at least two aldehyde scavengers is present in said composition in an amount of about 0.05 parts per hundred parts of the at least one polyol to 2.0 parts per hundred parts of the at least one polyol.

2. The composition of claim 1 wherein the mixture of at least two aldehyde scavengers comprises at least one member selected from the group consisting of phenol, cardanol, 2-methylphenol, 4-methylphenol, 4-t-butylphenol, 2-methoxyphenol, 4-methoxyphenol, phloroglucinol, and 4-nonylphenol.

3. The composition of claim 1 wherein the mixture of at least two aldehyde scavengers comprises at least one member selected from the group consisting of diethyl malonate, dimethyl malonate, 2,4-pentanedione, 1,3-cyclohexanedione malonamide, and N,N,N′N′-tetramethylmalonamide.

4. The composition of claim 1 wherein the mixture of at least two aldehyde scavengers comprises melamine.

5. The composition of claim 1 wherein the mixture of at least two aldehyde scavengers comprises 1,2-diaminocyclohexane.

6. The composition of claim 1 wherein the mixture of at least two aldehyde scavengers comprises at least one member selected from the group consisting of ammonium carbonate, ammonium chloride, and ammonium nitrate.

7. The composition of claim 1 further comprising at least one additional diluent other than water.

8. A method for producing polyurethane foam, the method comprising providing the composition of claim 1 , and contacting with at least one polyisocyanate, thereby reacting the at least one polyol and the at least one polyisocyanate to produce the polyurethane foam.

9. A polyurethane foam produced by the method of claim 8 .

10. The polyurethane foam of claim 9 wherein the polyurethane foam has formaldehyde emissions below about 2 μg/m 3 and aldehyde emissions below about 0.35 μg/m 3 .

11. The polyurethane foam of claim 9 wherein the polyurethane foam has no acetaldehyde or formaldehyde emissions originating therefrom.

Assignees

• Evonik Operations Gmbh

Inventors

• Burdeniuc Juan Jesus
• Lal Gauri Sankar
• Al-Rashid Jennifer Elizabeth Antoline
• Panitzsch Torsten

Classifications

• C08G18/3228 Primary

  acyclic · CPC title

• C08G18/341

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

• C08G18/4816

  mixtures of two or more polyetherpolyols having at least three hydroxy groups · CPC title

• C08G18/3246

  heterocyclic, the heteroatom being oxygen or nitrogen in the form of an amino group · CPC title

• C08G18/3234

  cycloaliphatic · CPC title