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

Patent metadata

Field	Value
Publication number	US-11920016-B2
Application number	US-202117523799-A
Country	US
Kind code	B2
Filing date	Nov 10, 2021
Priority date	Sep 19, 2017
Publication date	Mar 5, 2024
Grant date	Mar 5, 2024

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.

First claim

What is claimed is:

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.

2. The polyol premix of claim 1 wherein said polyol in said polyol premix consists essentially of polyester polyol.

3. The polyol premix of claim 1 wherein said polyol in said polyol premix comprises at least about 50% by weight of polyester polyol.

4. The polyol premix of claim 1 wherein said polyol in said polyol premix comprises at least about 70% by weight of polyester polyol.

5. The polyol premix of claim 1 wherein said polyol in said polyol premix comprises at least about 80% by weight of polyester polyol.

6. The polyol premix of claim 1 wherein said polyol in said polyol premix comprises at least about 90% by weight of polyester polyol.

7. The polyol premix of claim 1 wherein the de-frothing time of said polyol premix is at least about 50% less than the defrothing time of said polyol premix except having a blowing agent consisting of transHFCO-1233zd.

8. The polyol premix of claim 1 wherein the de-frothing time of said polyol premix is at least about 80% less than the defrothing time of said polyol premix except having a blowing agent consisting of transHFCO-1233zd.

9. The polyol premix of claim 1 wherein said blowing agent further comprises cis-1,1,1,4,4,4-hexafluoro-2-butene.

10. The polyol premix of claim 1 wherein said blowing agent further comprises methyl formate.

11. The polyol premix of claim 1 wherein said blowing agent further comprises cis-1,1,1,4,4,4-hexafluoro-2-butene and methyl formate.

12. The polyol premix of claim 1 wherein said blowing agent consists essentially of transHFCO-1233zd, cis-1,1,1,4,4,4-hexafluoro-2-butene and methyl formate.

13. The polyol premix of claim 1 wherein said blowing agent consists essentially of transHFCO-1233zd and cis-1,1,1,4,4,4-hexafluoro-2-butene.

14. The polyol premix of claim 1 wherein said blowing agent consists essentially of transHFCO-1233zd and methyl formate.

15. The polyol premix of claim 1 further comprising a surfactant.

16. The polyol premix of claim 15 wherein said surfactant comprises a silicone surfactant.

17. The polyol premix of claim 16 wherein said surfactant further comprises a glycol ether.

18. The polyol premix of claim 1 wherein the de-frothing time of said polyol premix is not greater than about 40 minutes.

19. The polyol premix of claim 1 wherein the de-frothing time of said polyol premix is not greater than about 30 minutes.

20. The polyol premix of claim 1 wherein the de-frothing time of said polyol premix is not greater than about 20 minutes.

Assignees

• Honeywell Int Inc

Inventors

• Yu Bin
• Bogdan Mary C
• Williams David John
• Ling Yiu Keung

Classifications

• C08J9/02 Primary

  using blowing gases generated by the reacting monomers or modifying agents during the preparation or modification of macromolecules · CPC title

• C08J9/142 Primary

  Compounds containing oxygen but no halogen atom · CPC title

• C08J9/145

  only chlorine as halogen atoms · CPC title

• C08J9/146

  only fluorine as halogen atoms · CPC title

• C08J2201/022

  premixing or pre-blending a part of the components of a foamable composition, e.g. premixing the polyol with the blowing agent, surfactant and catalyst and only adding the isocyanate at the time of foaming · CPC title