Foams and foamable compositions containing halogenated olefin blowing agents

Patent metadata

Field	Value
Publication number	US-9695267-B2
Application number	US-84738110-A
Country	US
Kind code	B2
Filing date	Jul 30, 2010
Priority date	Aug 11, 2009
Publication date	Jul 4, 2017
Grant date	Jul 4, 2017

Abstract

The invention provides foam forming methods that comprise: (a) preparing a foamable system comprising at least one hydrohaloolefin; and (b) ensuring either (i) the substantial absence of long-term decomposition-inducing contact between said hydrofluoroolefin and an amine-containing catalyst; (ii) that an effective amount of surfactant is available in the system under conditions which prevent long term exposure of the surfactant to a long-term decomposition reaction environment; or (iii) a combination of (i) and (ii). Related methods, foamable systems and foams are also disclosed. Preferred embodiments provide polyurethane and polyisocyanurate foams and methods for the preparation thereof, including closed-celled, polyurethane and polyisocyanurate foams and methods for their preparation. The preferred foams are characterized by a fine uniform cell structure and little or no foam collapse. The foams are preferably produced with a polyol premix composition which comprises a combination of a hydrohaloolefin blowing agent, a polyol, a silicone surfactant, a catalyst and is further characterized by being substantially free of added water.

First claim

What is claimed is:

1. A foam forming method comprising:
(a) providing a foamable system comprising: (i) polyol contained in a B-side; (ii) isocyanate reactive with said polyol in an A-side; (ii) a catalytically effective amount of an amine-containing catalyst; and (iii) blowing agent comprising trans-1-chloro-3,3,3-trifluoropropene (transHFCO-1233zd) and water, wherein said transHFCO-1233zd is decomposition reactive with said amine-containing catalyst, said providing step comprising forming said B-side to include said trans-1-chloro-3,3,3-trifluoropropene (transHFCO-1233zd) and said amine-containing catalyst, and to be substantially free of water;
(b) storing said B-side for a storage period of at least about 2 months; and
(c) after said storage step (b) forming a foam from the foamable system provided in step (a) by mixing said stored B-side with said A-side.

2. The foam forming method of claim 1 wherein said B side is storage stable for a period of at least about 3 months.

3. The foam forming method of claim 1 wherein said B side is storage stable for a period of at least about 6 months.

4. The foam forming method of claim 1 wherein said B side does not contain a substantial amount of a polar solvent.

5. The foam forming method of claim 1 wherein said B side is substantially free of polar solvents.

6. The foam forming method of claim 1 wherein a gas-generating co-blowing agent other than water is included in said A side, said B side, or both.

7. The foam forming method of claim 6 wherein said gas-generating co-blowing agent comprises formic acid.

8. The foam forming method of claim 1 wherein said B side is storage stable for a period of at least about 2 months.

9. A foam formed from the method of claim 1 .

Assignees

• Williams David J
• Gittere Clifford P
• Van Der Puy Michael
• Honeywell Int Inc

Inventors

• Williams David J
• Gittere Clifford P
• Van Der Puy Michael

Classifications

• C08G2101/00

  Manufacture of cellular products · CPC title

• C08J2375/04

  Polyurethanes · CPC title

• C08G18/1808 Primary

  having alkylene polyamine groups · CPC title

• C08J9/146 Primary

  only fluorine as halogen atoms · CPC title

• C08G18/1816

  having carbocyclic groups · CPC title