Patent ID: 11920016
Assignee: HONEYWELL INTERNATIONAL INC.
Field: Other special machines (Mechanical engineering)
Classification: CPC C | IPC C

Claim 0:
1. A polyol premix having improved resistance to frothing comprising:
(a) one or more polyester polyols; and
(b) a blowing agent comprising from greater than about 80% to about 97% by weight based on the total weight of blowing agent of trans 1-chloro-3,3,3-trifluoropropene (transHFCO-1233zd) and from about 3% to less than about 20% by weight based on the total weight of blowing agent of at least one of cis-1,1,1,4,4,4-hexafluoro-2-butene (HFO-1336mzzm(Z) or cis-1336mzzm), methyl formate, and combinations of these, wherein the de-frothing time of said polyol premix is at least about 30% less than the defrothing time of said polyol premix except having a blowing agent consisting of transHFCO-1233zd.