FOAMS AND ARTICLES MADE FROM FOAMS CONTAINING 1-CHLORO-3,3,3-TRIFLUOROPROPENE (1233ZD)
The present invention relates to polyurethane foams having a polymeric foam structure including a plurality of closed cells therein; and an HFO or HCFO blowing agent, including HCFO-1233zd. In certain aspects, the present invention relates to foam premixes, and the resulting foam structures, that include HCFO-1233zd as blowing agent used alone, or in certain aspects, in a blend with a co-blowing agent such as cyclopentane, iso-pentane, n-pentane, or methyl formate.
1 . A method for applying a sprayable polyol foam to a substrate comprising:
providing a sprayable polyol foam premix composition comprising trans-1-chloro-3,3,3-trifluoropropene (1233zd(E)) as a blowing agent;
spraying the polyol foam premix composition under conditions of relatively high temperature and/or relatively high temperature onto said substrate; and
curing the a polyol foam premix composition to form a closed cell foam under conditions of relatively high temperature and/or relatively high temperature onto said substrate.
2 . The method of claim 1 , wherein the closed cell foam exhibits an at least about 5% lambda improvement compared to the same formulation, spray step and curing cure step except that HFC-245fa is in place of trasn-1233zd on a mole per mole basis.
3 . The method of claim 1 , wherein the applied foam exhibits a tack free time that is less than about 25 seconds.
4 . The method of claim 1 , wherein the applied foam exhibits a density variance of less than about 9.
5 . The method of claim 1 , wherein said gas comprises at least 50% by volume of said trans-1-chloro-3,3,3-trifluoropropene.
6 . The method of claim 1 , wherein said gas consists essentially of trans-1-chloro-3,3,3-trifluoropropene.
7 . The method of claim 1 , wherein polyurethane or polyisocyanurate foamable premix composition further comprises a polyol component, wherein the polyol component is present in an amount of from about 60 wt. % to about 95 wt. % and wherein trans-1-chloro-3,3,3-trifluoropropene is in an amount of from about 1 wt. % to about 30 wt. %.
8 . The method of claim 7 , further comprising at least one additional blowing agent other than trans-1-chloro-3,3,3-trifluoropropene, which is selected from the group consisting of water, organic acids that produce CO 2 and/or CO, hydrocarbons; ethers, halogenated ethers; esters, alcohols, aldehydes, ketones, pentafluorobutane; pentafluoropropane; hexafluoropropane; heptafluoropropane; trans-1,2 dichloroethylene; methylal, methyl formate; 1-chloro-1,2,2,2-tetrafluoroethane (HCFC-124); 1,1-dichloro-1-fluoroethane (HCFC-141b); 1,1,1,2-tetrafluoroethane (HFC-134a); 1,1,2,2-tetrafluoroethane (HFC-134); 1-chloro 1,1-difluoroethane (HCFC-142b); 1,1,1,3,3-pentafluorobutane (HFC-365mfc); 1,1,1,2,3,3,3-heptafluoropropane (HFC-227ea); trichlorofluoromethane (CFC-11); dichlorodifluoromethane (CFC-12); dichlorofluoromethane (HCFC-22); 1,1,1,3,3,3-hexafluoropropane (HFC-236fa); 1,1,1,2,3,3-hexafluoropropane (HFC-236e); 1,1,1,2,3,3,3-heptafluoropropane (HFC-227ea), difluoromethane (HFC-32); 1,1-difluoroethane (HFC-152a); 1,1,1,3,3-pentafluoropropane (HFC-245fa); 1,3,3,3-tetrafluoropropene (HFO-1234ze); 1,1,1,4,4,4-hexafluorobut-2-ene (HFO-1336mzzm); butane; isobutane; normal pentane; isopentane; cyclopentane, and combinations thereof.
9 . The method of claim 7 , further comprising one or more additional agents selected from the group consisting of a silicone surfactant, a non-silicone surfactant, a metal catalyst, an amine catalyst, a flame retardant, and combinations thereof.
10 . The method of claim 9 , wherein the silicone surfactant is provided in the polyol premix composition in an amount of from about 0.5 wt. % to about 5.0 wt. %.
11 . The method of claim 9 , wherein the non-silicone surfactant is provided in the polyol premix composition in an amount of from about 0.05 wt. % to about 3.0 wt. %.
12 . The method of claim 9 , wherein the amine catalyst is provided in the polyol premix composition in an amount of from about 0.05 wt. % to about 3.0 wt. %.
13 . The method of claim 9 , wherein the metal catalyst is provided in the polyol premix composition in an amount of from about 0.5 wt. % to about 10.0 wt. %.