# US H2,233 H1 · Catalysts which stabilize hydrofluorocarbon blowing agents in polyurethane foam compositions

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- Number: US H2,233 H1
- Document ID: USH2233H1
- Status: Granted
- Kind: H1
- Application number: 09/633,664
- Filed: 2000-08-07
- Granted: 2009-11-03
- Earliest claimed: 2000-08-07
- Assignees: Air Products and Chemicals, Inc.
- Inventors: Jeffrey Kramer
- Web page: https://patentgrep.com/patent/USH2233H1

## Abstract

A composition comprising a polyisocyanate, a polyol, a hydrofluorocarbon blowing agent, optionally water, a surfactant, and at least one catalyst for the reaction of the polyisocyanate with the polyol and/or the reaction of the polyisocyanate with water, the catalyst being selected from the group consisting of triethylenediamine; N-2-hydroxy-propyltriethylenediamine ammonium salt; N-cetyl-N,N-dimethylamine; N,N-diethylethanamine; N,N-dimethylaminoethylmorpholine; bis(3-dimethylaminopropyl)-N,N-dimethylpropanediamine; N-cyclohexyl-N-methylcyclohexylamine; 1,3,5-tris(3-(dimethylamino)propyl)hexahydro-s-triazine; bis(dimethylaminopropyl)methylamine; dibutyltin dilaurylmercaptide; dibutyltin diisooctylmaleate; dibutyltin bis(2-ethylhexylmercaptoacetate); stannous octoate, 1,2-dimethylimidizole, bis-(dimethylaminoethyl)ether; bis(3-dimethylaminopropyl)-N,N-dimethylpropanediamine and bis(N,N-dimethylaminoethyl)-ether and resulting in a decreased amount of decomposition of the hydrofluorocarbon blowing agent to fluoroalkene.

## Claims

### Claim 1

A composition comprising a polyisocyanate, a polyol, a hydrofluorocarbon blowing agent, optionally water as an additional blowing agent, a surfactant, and at least one catalyst for the reaction of the polyisocyanate with the polyol and/or the reaction of the polyisocyanate with water, the catalyst being selected from the group consisting of triethylenediamine; N-2-hydroxypropyltriethylenediamine ammonium salt; N-cetyl-N,N-dimethylamine; N,N-diethyl-ethanamine; N,N-dimethylaminoethylmorpholine; bis(3-dimethylamino-propyl)-N,N-dimethylpropanediamine; N-cyclohexyl-N-methylcyclohexylamine; 1,3,5-tris(3-(dimethylamino)propyl)hexahydro-s-triazine; bis(dimethylaminopropyl)methylamine; dibutyltin dilaurylmercaptide; dibutyltin diisooctylmaleate; dibutyltin bis(2-ethylhexylmercaptoacetate); stannous octoate, 1,2-dimethylimidizole; bis-(dimethylaminoethyl)ether; bis(3-dimethylaminopropyl)-N,N-dimethylpropanediamine and bis(N,N-dimethylaminoethyl)ether and resulting in a decreased amount of decomposition of the hydrofluorocarbon blowing agent to fluoroalkene.

### Claim 2

A process for preparing polyurethane foam which comprises reacting a polyol with a polyisocyanate in the presence of a hydrofluorocabon blowing agent, optionally water as an additional blowing agent, a surfactant, and at least one catalyst selected from the group consisting of trithylenediamine; N-2-hydroxypropyltriethylenediamine ammonium salt; N-cetyl-N,N-dimethylamine; N,N-diethyl-ethanamine; N,N-dimethylaminoethylmorpholine; bis(3-dimethylaminopropyl)-N,N-dimethylpropanediamine; N-cyclohexyl-N-methylcyclohexylamine; 1,3,5-tris(3-dimethylamino)popyl)-hexahydro-s-triazine; bis(dimethylamino-propyl)methylamine; dibutyltin dilauryl-mercaptide; dibutyltin diisooctylmaleate; dibutyltin bis(2-ethylhexylmercaptoacetate); stannous octoate, 1,2-dimethylimidizole, bis-(dimethylaminoethyl)ether; bis(3-dimethylaminorpopyl)-N,N-dimethylpropanediamine and bis(N,N-dimethylaminoethyl)ether, in which the catalyst results in a decreased amount of decomposition of the hydrofluorocarbon blowing agent to fluoroalkene.