Reducing emissions in polyurethane foam
AssigneeEvonik Degussa GmbH
InventorsJuan Jesus Burdeniuc, Courtney Thompson Thurau, Renee Jo Keller, Allen Robert Arnold
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Abstract
This invention disclosure relates to a process to make flexible open cell polyurethane foam with optimum mechanical properties and lowest chemical emissions. Using the selection of tertiary amine catalysts together with a group of carboxylic acids according to this disclosure can produce foam products with optimum properties and lowest chemical emanations.
Claims9
A catalyst for producing a flexible open cell polyurethane foam comprising:
- i) a combination of:
- adipic acid;
- and
- at least one non-emissive and isocyanate reactive tertiary amine gelling catalyst selected from the group consisting of bis(dimethylaminopropyl)amine, dimethylaminoethoxyethanol, dimethylaminopropylurea, N-dimethylaminopropyl-N-(2-hydroxyethyl)-N-methylamine, and N-dimethylaminoethyl-N-(2-hydroxyethyl)-N-methylamine,
- wherein the weight ratio of the at least one gelling catalyst to adipic acid is between 3.33:1 to 5:1;
- and
- ii) at least one amine blowing catalyst selected from the group consisting of 2-[N-(dimethylaminoethoxyethyl)-N-methylamino]ethanol, and N,N,N′-trimethyl-N′-3-aminopropyl-bis(aminoethyl) ether,
- wherein the flexible open cell polyurethane foam produced using the catalyst has no tertiary amine or acid emissions according to VDA method 278.
A catalyst comprising:
- i) a combination of:
- adipic acid;
- and
- at least one tertiary amine catalyst selected from the group consisting of bis(dimethylaminopropyl)amine, dimethylaminoethoxyethanol, dimethylaminopropylurea, N-dimethylaminopropyl-N-(2-hydroxyethyl)-N-methylamine, and N-dimethylaminoethyl-N-(2-hydroxyethyl)-N-methylamine,
- wherein the tertiary amine is substantially free of primary hydroxyl groups;
- and
- wherein the weight ratio of the at least one tertiary amine catalyst to adipic acid is between 3.33:1 to 5:1;
- and
- ii) at least one bis(dimethylaminoethyl)ether.
A catalyst for producing an open celled flexible polyurethane foam comprising:
- i) a combination of:
- adipic acid;
- and
- a solution comprising at least one non-emissive and isocyanate reactive tertiary amine gelling catalyst selected from the group consisting of bis(dimethylaminopropyl)amine, dimethylaminoethoxyethanol, dimethylaminopropylurea, N-dimethylaminopropyl-N-(2-hydroxyethyl)-N-methylamine, and N-dimethylaminoethyl-N-(2-hydroxyethyl)-N-methylamine,
- wherein the weight ratio of the at least one gelling catalyst to adipic acid is between 3.33:1 to 5:1, and
- ii) at least one amine blowing catalyst selected from the group consisting of 2-[N-(dimethylaminoethoxyethyl)-N-methylamino]ethanol, and N,N,N′-trimethyl-N′-3-aminopropyl-bis(aminoethyl) ether,
- wherein the foam produced using the catalyst has no tertiary amine or acid emissions according to VDA method 278.
A catalyst for producing an open celled flexible polyurethane foam comprising:
- i) a combination of:
- adipic acid;
- and
- at least one non-emissive and isocyanate reactive tertiary amine gelling catalyst selected from the group consisting of bis(dimethylaminopropyl)amine, dimethylaminoethoxyethanol, dimethylaminopropylurea, N-dimethylaminopropyl-N-(2-hydroxyethyl)-N-methylamine, and N-dimethylaminoethyl-N-(2-hydroxyethyl)-N-methylamine,
- wherein the weight ratio of the at least one gelling catalyst to adipic acid is between 3.57:1 to 5:1, and
- wherein the tertiary amine is substantially free of primary hydroxyl groups;
- and
- i) a solution comprising at least one amine blowing catalyst selected from the group consisting of 2-[N-(dimethylaminoethoxyethyl)-N-methylamino]ethanol, and N,N,N′-trimethyl-N′-3-aminopropyl-bis(aminoethyl) ether,
- wherein the foam produced using the catalyst has no tertiary amine or acid emissions according to VDA method 278.
Dependencies are inferred from the claim text.