摘要:
A method for improving the processability of foam premixes containing HFC and/or pentane-based blowing agents in polyols is provided, which method comprises adding trans-1,2-dichloroethylene to said premix in an amount effective to enhance said processability.
摘要:
Foam blowing agents blends of 5-50 mole % HCFC-22 and 95-50 mole % of n-pentane, i-pentane and/or cyclopentane are provided, as are polyol premixes and polyurethane foam compositions containing such blends.
摘要:
Nonflammable foam blowing agent blends of 142b or 124 are provided, as are polyol premixes and polyurethane foam compositions containing such blends.
摘要:
Nonflammable foam blowing agent blends of 142b or 124 are provided, as are polyol premixes and polyurethane foam compositions containing such blends.
摘要:
An embodiment of a closed-cell polymeric rigid foam may be made using a one-shot method and a reaction system that includes a hydrofluoroalkene physical blowing agent and a polyol mixture having an aminic polyol. The hydrofluoroalkene blowing agent has 3 to 5 carbon atoms and a boiling point between 10° C. and 40° C. at 1 atmosphere pressure. Embodiments of rigid foams may have high closed cell content and are particularly well suited for thermal insulation.
摘要:
An embodiment of a closed-cell polymeric rigid foam may be made using a one-shot method and a reaction system that includes a hydrofluoroalkene physical blowing agent and a polyol mixture having an aminic polyol. The hydrofluoroalkene blowing agent has 3 to 5 carbon atoms and a boiling point between 10° C. and 40° C. at 1 atmosphere pressure. Embodiments of rigid foams may have high closed cell content and are particularly well suited for thermal insulation.
摘要:
A tran-1,2-dichloroethylene blend which comprises a combination of a major amount of tran-1,2-dichloroethylene and a minor amount of a hydrofluorocarbon or an alkoxy perfluoroalkane having an elevated flash point is disclosed. The combination exhibits a flash point significantly higher than trans-1,2-dichloroethylene alone while containing only a minor amount of the component exhibiting the high Global Warming Potential. The preferred hydrofluorocarbon is 1,1,1,2,2,3,4,5,5,5-decafluoropentane or 3,3,4,4,5,5,6,6,6-nonafluoro-1-hexene and the preferred alkoxy perfluoroalkane is 1-(methoxy)nonafluorobutane.
摘要:
Foam blowing agent blends of trans-1,2-dichloroethylene and one or more pentanes are provided, as are polyol premixes and foam compositions containing such blends. The resulting foams exhibit dramatic improvement in fire resistance.
摘要:
Foam blowing agent blends of D11 and a pentane are provided, as are polyol premixes containing such blends. The resulting foams exhibit dramatic improvement in fire resistance.
摘要:
Foam blowing agents blends of 5-50 mole % HCFC-22 and 95-50 mole % of n-pentane, i-pentane and/or cyclopentane are provided, as are polyol premixes and polyurethane foam compositions containing such blends.