Improved hydrofluorocarbon blown foam and method for...

Details Improved hydrofluorocarbon blown foam and method for... Improved hydrofluorocarbon blown foam and method for...

C - Chemistry, Metallurgy

08

J

C08J 9/14 (2006.01) C08G 18/08 (2006.01)

Patent

CA 2386931

The invention relates to the addition of .alpha.-methyl styrene, isobutanol and/or isopropanol to reduce vapor pressure, improve k-factor, enhance the solubility of the blowing agent in the premix and/or improve the processing characteristics of polyurethane and polyisocyanurate closed-cell foams prepared with a blowing agent comprising a hydrofluorocarbon selected from the group consisting of 1,1,1,3,3-pentafluoropropane, 1,1,1,2-tetrafluoroethane, 1,1,2,2- tetrafluoroethane, and mixtures thereof.

L'invention concerne l'addition de alpha -méthyl styrène, d'isobutanol et/ou d'isopropanol pour réduire la tension de vapeur, augmenter le facteur K, favoriser la solubilité de l'agent d'expansion dans le prémélange et/ou améliorer les caractéristiques des mousses de polyuréthanne et de polyisocyanate à alvéoles fermées préparées à l'aide d'un agent d'expansion comprenant un hydrofluorocarbone sélectionné dans le groupe constitué de 1,1,1,3,3-pentafluoropropane, de 1,1,1,2-tétrafluoroéthane, de 1,1,2,2-tétrafluoroéthane et des mélanges de ces produits.

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