Hydrofluorocarbon blown foam and method for preparation thereof

Details Hydrofluorocarbon blown foam and method for preparation thereof Hydrofluorocarbon blown foam and method for preparation thereof

1999-03-15

2000-07-11

Foelak, Morton

Compositions

Preservative agents

Anti-corrosion

521117, 521131, C08K 300, C08J 914

Patent

active

060867884

ABSTRACT:
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.

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patent: 5532284 (1996-07-01), Bartlett et al.
M. Bogdan, D. Orlowski, J. Bennington, J. Welch, A Method for the Determination of Cell Gas Content in Polyurethane Foams, Polyurethane 1995, Sep. 26-29, 1995, pp. 24-37.
J.E. Christian, G.E. Courville, R.L. Linkous, R.L. Wendt, T. Smith, R. S Graves, The Technical Viability of Alternative Blowing Agents in Polyisocyanurate Roof Insulation 33.sup.rd Annual Polyurethane Technical/Marketing Conference, Sep. 30, 1990-Oct. 3, 1990 pp. 247-258.

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