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Blowing agent composition of hydrochlorofluoroolefin and hydrofluoroolefin

Inactive Publication Date: 2010-03-04
ARKEMA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0007]The hydrofluoroolefin, preferably HFO-1234ze in combination with a hydrochlorofluoroolefin (HCFO) preferably selected from HCFO-1223, HCFO-1233zd, HCFO-1233xf and mixtures thereof combination can be used as a foaming agent for thermosetting foams by being mixed in a polyols mixture. The resulted products show superior quality including decreased density and improved k-factor. The foaming agent dissolves in thermosetting polymers, and provides a degree of plasticization sufficient to produce acceptable foams.

Problems solved by technology

Currently used blowing agents for thermoset foams include HFC-134a, HFC-245fa, HFC-365mfc that have relatively high global warming potential, and hydrocarbons such as pentane isomers flammable and have low energy efficiency.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

Foam Preparation

[0013]The foam was made by a small polyurethane dispenser. The dispenser consists of two pressurized cylinders, and pressure can be adjusted by regulators. B-side (polyols) mixtures were pre-blended and then charged into pressurized cylinders, and A-side consists of MDI. Blowing agents were then added into B-side cylinder and mixed thoroughly. The cylinders were connected to dispensing gun equipped with a static mixer. The pressures of both cylinders were adjusted so that desired ratio of A and B sides can be achieved. The formulations tested (all had an Iso Index on ROH of 110) each contained Rubinate M, a polymeric methylene diphenyl diisocyanate (MDI) available from Huntsman; Jeffol SG-360 and R-425-X, polyols from Huntsman; TEAP-265, a polyol from Carpenter Company. TegostabB 8465 a surfactant available from Evonik-Degussa. Jeffcat TD33A and ZR-70 are catalysts from Huntsman. NP 9.5, a compatibilizer from Huntsman. Total blowing level is 26.0 mls / g.

TABLE 1Formula...

example 2

B-Side Vapor Pressure

[0014]

TABLE 2HFO1234ze Vapor Pressure in B-side mixturesABCDB-side Vapor Pressure (psig)44.039.000HFO 1234ze (wt %)23.319.62.40HCFO 1233zd (wt %)02.221.624.3Pressure / concentration*18919900*B-side vapor pressure / HFO1234ze concentration

[0015]The results as shown in Table 2 illustrate that use of HCFO1233zd can reduce the vapor pressure of b-side mixture. The lower the vapor pressure, the better solubility of a blowing agent. From test A to C, as HFO1234ze concentration decreases, the pressure decreases, however, for sample C, the vapor pressure was zero psig, this is an unexpected result.

example 3

K-Factor

[0016]As shown in Table 3, the k-factor measurements (ASTM C518) on the resulting foams were conducted at between 10 and 130° F. Initial k-factors are taken within 48 hours after removing foam skin with a band saw. Lower k-factors indicate better insulation values.

TABLE 3Comparison of k-factorsTemperatureABCDE(° F.)K factor (Btu. in. / ft2. h. ° F.)17.60.13370.12250.12520.12220.128932.00.13730.12850.12850.12500.134350.00.14300.13810.13420.13020.141975.20.15420.15000.14580.14160.1536104.00.16770.16360.15920.15490.1670K-factor is a key parameter for thermal insulation. Addition of HCFO1233zd to HFO1234ze improved the k-factor of foam made of HFO 1234ze alone.

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PUM

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Abstract

A blowing agent for thermosetting foams is disclosed. The blowing agent is a hydrofluoroolefin (HCFO), preferably HFCO-1234ze in combination with a hydrochlorofluoroolefin (HCFO) preferably one selected from HCFO-1233zd, HCFO-1223, HCFO-1233xf and mixtures thereof. The blowing agent is effective as a blowing agent in the manufacture of thermosetting foams.

Description

FIELD OF THE INVENTION[0001]The present invention relates to blowing agents for thermosetting foams. More particularly, the present invention relates to the use of at least one hydrofluoroolefin such as HFO-1234ze in combination with at least one hydrochlorofluoroolefin (HCFO) such as HCFO-1223, HCFO-1233zd, HCFO-1233xf and mixtures thereof as a blowing agent in the manufacture of thermosetting foams.BACKGROUND OF THE INVENTION[0002]The Montreal Protocol for the protection of the ozone layer, signed in October 1987, mandated the phase out of the use of chlorofluorocarbons (CFCs). Materials more “friendly” to the ozone layer, such as hydrofluorocarbons (HFCs) eg HFC-134a replaced chlorofluorocarbons. The latter compounds have proven to be green house gases, causing global warming and were regulated by the Kyoto Protocol on Climate Change, signed in 1998. The emerging replacement materials, hydrofluoropropenes, were shown to be environmentally acceptable i.e. has zero ozone depletion ...

Claims

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Application Information

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IPC IPC(8): C08J9/14C09K3/00C09K23/00
CPCC08J9/144C08J9/146C08J9/149C08J2300/106C08J2203/162C08J2203/182C08G18/06C08J2203/142C09K23/017C08J2375/04C08J2300/104
Inventor CHEN, BENJAMIN BINCOSTA, JOSEPH S.BONNET, PHILIPPEELSHEIKH, MAHER Y.VAN HORN, BRETT L.
Owner ARKEMA INC
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