HFO containing PU formulation

Patent metadata

Field	Value
Publication number	US-12398232-B2
Application number	US-201816480578-A
Country	US
Kind code	B2
Filing date	Jan 30, 2018
Priority date	Jan 31, 2017
Publication date	Aug 26, 2025
Grant date	Aug 26, 2025

Abstract

The present invention is directed to polyol composition comprising a polyol mixture (PM) comprising a polyetherol (P1) based on a polyhydric alcohol and a polyetherol (P2) based on a diamine; and at least one hydrohaloolefin (HFO) as blowing agent, a process for preparing a polyurethane foam using said polyol composition and the polyurethane foam obtained or obtainable by said process.

First claim

The invention claimed is:

1. A polyol composition, comprising:
(a) a polyol mixture (PM) comprising a polyetherol (P1) based on a polyhydric alcohol and a polyetherol (P2) based on a diamine; and
(b) at least one hydrohaloolefin as a blowing agent,
wherein the diamine is selected from the group consisting of etbylenediamine, toluenediamine (TDA), and mixtures thereof,
polyetherol (P2) is present in the polyol mixture in an amount in the range of from 1 to 40 parts by weight based on the total weight of the polyol mixture,
said polyol mixture comprises 60 to 80 parts by weight of polyetherol (P1),
at least one hydrohaloolefin is present in an amount of from 3 to 40 parts by weight based on the total weight of the polyol composition,
the polyol composition comprises at least one tertiary amine as catalyst, and
wherein said polyhydric alcohol is at least one selected from the group consisting of sucrose, pentaerythritol, glucose, glycerol, a glycol, trimethylolpropane (TMP), and combinations thereof.

2. The polyol composition according to claim 1 , wherein the at least one hydrohaloolefin is at least one selected from the group consisting of trans-1-chloro-3,3,3-trifluoro-propene (HCFO-1233zd(E)), cis-1-chloro-3,3,3-trifluoro-propene (HCFO-1233zd(Z)), trans-1,1,1,4,4,4-hexafluoro-but-2-ene (HFO-1336mzz(E)), cis-1,1,1,4,4,4-hexafluoro-but-2-ene (HFO-1336mzz(Z)), trans-1,3,3,3-tetrafluoroprop-1-ene (HFO-1234ze(E)), and cis-1,3,3,3-tetrafluoroprop-1-ene (HFO-1234ze(Z)).

3. The polyol composition according to claim 1 , wherein the polyetherol (P2) is a toluene diamine-initiated alkylene oxide-based polyether polyol.

4. The polyol composition according to claim 1 , wherein the polyetherol (P2) has a hydroxyl number in the range of from 100 to 1000 mg KOH/g.

5. The polyol composition according to claim 1 , wherein the polyol mixture (PM) further comprises at least one polyester polyol (P3).

6. The polyol composition according to claim 5 , wherein the at least one polyester polyol (P3) is present in the polyol mixture in an amount in the range of from 1 to 50 parts by weight based on the total weight of the polyol mixture.

7. The polyol composition according to claim 1 , wherein the polyol composition further comprises at least one selected from the group consisting of a flame retardant, an ultraviolet stabilizer, a surfactant and a filler.

8. A process for preparing a polyurethane foam, comprising:
preparing and storing the polyol composition according to claim 1 to form a stored polyol composition; and
reacting at least one polyisocyanate with said stored polyol composition.

9. A polyurethane foam, obtained by the process according to claim 8 .

10. The polyol composition according to claim 1 , where said polyol composition excludes dicyclohexylmethylamine.

11. The process according to claim 8 , wherein said polyol composition is stored for at least 4 weeks.

12. The polyol composition according to claim 1 , wherein said polyol composition excludes a hydrocarbon blowing agent.

13. The polyol composition according to claim 1 , wherein said polyol composition excludes pentane.

Assignees

• Basf Se

Inventors

• Rolfsen Christine
• Grever Marko
• Eslava Josep-Daniel
• Elbing Mark

Classifications

• C08J2375/08

  from polyethers · CPC title

• C08J2203/162

  Halogenated unsaturated hydrocarbons, e.g. H2C=CF2 · 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

• C08J9/146

  only fluorine as halogen atoms · CPC title

• C08G18/5069

  prepared from polyepoxy compounds · CPC title