Dow Global Technolgoies LLC

Francesca Pignagnoli

Vanni Parenti

Giuseppe Vairo

Paolo Golini

Luigi Pellacani

Cecilia Girotti

Luca Lotti

Eric M Rexrode

Maurizio Guandalini

Kelly R Flaherty

Luigi Bertucelli

Robert Davidson

Alberto Fangareggi

A process of making a polyurethane or polyisocyanurate foam comprises the step of mixing under low pressure: (A) An isocyanate; (B) A compound reactive with the isocyanate, e.g., a polyol; (C) A liquid blowing agent; and (D) Carbon dioxide.

Low pressure process for frothing polyurethane or polyisocyanurate

Disclosed is a polyol composition comprising an aliphatic polyester polyol having a hydroxyl value of less than about 100 and prepared by the reaction of at least a polycarboxylic acid with a polyhydroxy compound; an aromatic polyester polyol; a Novolac-type polyether polyol; and a hydrofluorocarbon blowing agent; that may be storage-stable for at least 60 days. This composition may be reacted with a polyisocyanate at an isocyanate index of from about 2.5 to about 4 to form a rigid poly-isocyanurate foam. The foam shows improved cohesion in general and also improved adhesion and a reduced incidence of voids when applied to a metal substrate.

Storage-stable polyol compositions for producing rigid polyisocyanurate foam

Growing community of inventors

Nell'emilia, Italy

Francesca Pignagnoli