Methods of forming polyol premixes and foamable compositions and foams formed therefrom

Abstract

This invention relates to thermoset, thermal insulating panel, pour-in-place and pour-in-place foams having desirable and unexpectedly low thermal conductivity, and to compositions, method and systems which use and/or are used to make such foams comprising: (a) providing thermosetting foam forming component and a blowing agent for forming predominantly closed cells in the foam, wherein the blowing agent comprises: (i) cis-1,1,1,4,4,4-hexafluoro-2-butene (HFO-1336mzzm(Z)) and cyclopentane, with the HFO-1336mzzm(Z) and cyclopentane in the blowing agent together comprising at least about 50% by weight of the total of all components in the blowing agent and (ii) the weight ratio of HFO-1336mzzm(Z) to cyclopentane in the blowing agent is from about 45:55 to less than 68:32 and (b) forming foam from said provided foamable composition.

What is claimed is: 
     
         1 . A polyol premix having improved resistance to frothing comprising:
 (a) one or more polyols; and   (b) a blowing agent comprising at least about 70% by weight of transHFCO-1233zd and a physical co-blowing agent having defrothing properties selected from the group consisting of cis-1,1,1,4,4,4-hexafluoro-2-butene (HFO-1336mzzm(Z) or cis-1336mzzm), methylal, methyl formate, glycerine, trans dichloroethylene (tDCE) and mixtures of two or more of these, wherein the amount of said defrothing co-blowing is effective to reduce the de-frothing time of the polyol premix by at least about 30%.   
     
     
         2 . A polyol premix having improved resistance to frothing comprising:
 (a) one or more polyols; and   (b) a blowing agent comprising at least about 20% to about 75% by weight of cis1336mzzm and a physical co-blowing agent having defrothing properties comprising transHFCO-1233zd in an amount of effective to reduce the de-frothing time of the polyol premix by at least about 20 relative percent.   
     
     
         3 . The polyol premix of  claim 1  wherein the amount of said defrothing co-blowing is effective to reduce the de-frothing time of the polyol premix by at least about at least about 50%. 
     
     
         4 . The polyol premix of  claim 1  wherein the amount of said defrothing co-blowing is effective to reduce the de-frothing time of the polyol premix by at least about at least about 80%. 
     
     
         5 . The polyol premix of  claim 1  wherein said polyol comprises polyester polyol. 
     
     
         6 . The polyol premix of  claim 1  wherein said polyol comprises at least about 50% by weight of polyester polyol. 
     
     
         7 . The polyol premix of  claim 1  wherein said polyol comprises at least about 70% by weight of polyester polyol. 
     
     
         8 . The polyol premix of  claim 1  wherein said polyol comprises at least about 80% by weight of polyester polyol. 
     
     
         9 . The polyol premix of  claim 1  wherein said polyol comprises at least about 90% by weight of polyester polyol. 
     
     
         10 . The polyol premix of  claim 1  wherein said blowing agent comprises cis-1,1,1,4,4,4-hexafluoro-2-butene (HFO-1336mzzm(Z)) in an amount effective to reduce the de-frothing time of the polyol premix by at least about 30%. 
     
     
         11 . The polyol premix of  claim 1  wherein said blowing agent comprises cis-1,1,1,4,4,4-hexafluoro-2-butene (HFO-1336mzzm(Z) or cis-1336mzzm) in an amount effective to reduce the de-frothing time of the polyol premix by at least about 50%. 
     
     
         12 . The polyol premix of  claim 1  wherein said blowing agent comprises methylal in an amount effective to reduce the de-frothing time of the polyol premix by at least about 30%. 
     
     
         13 . The polyol premix of  claim 1  wherein said blowing agent comprises methylal in an amount effective to reduce the de-frothing time of the polyol premix by at least about 50%. 
     
     
         14 . The polyol premix of  claim 1  wherein said blowing agent comprises methyl formate in an amount effective to reduce the de-frothing time of the polyol premix by at least about 30%. 
     
     
         15 . The polyol premix of  claim 1  wherein said blowing agent comprises methyl formate in an amount effective to reduce the de-frothing time of the polyol premix by at least about 50%. 
     
     
         16 . The polyol premix of  claim 1  wherein said blowing agent comprises trans dichloroethylene (tDCE) in an amount effective to reduce the de-frothing time of the polyol premix by at least about 30%. 
     
     
         17 . The polyol premix of  claim 1  wherein said blowing agent comprises trans dichloroethylene (tDCE) in an amount effective to reduce the de-frothing time of the polyol premix by at least about 50%.