Furan-modified isocyanurate foams
AssigneeBASF Wyandotte Corporation
InventorsMoses Cenker, Thirumurti L. Narayan
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Abstract
Furan-modified rigid isocyanurate foams are taught herein. The foams herein are prepared by either (1) the in situ polymerization of furfuryl alcohol and/or furfural during the foam formation reaction, or (2) the catalytic condensation of a furfuryl alcohol-blocked organic polyisocyanate.
Claims12
A composition of matter consisting essentially of:
- an isocyanurate rigid foam having furan linkages bound to the backbone of the isocyanurate foam structure.
A process for the manufacture of a foam product consisting essentially of an isocyanurate foam having furan linkages bound to the backbone of the isocyanurate foam structure, comprising:
- catalytically condensing a previously prepared furfuryl alcohol-blocked organic polyisocyanate in the presence of a catalytically sufficient amount of an isocyanate trimerization catalyst.
A process for the manufacture of a foam product consisting essentially of an isocyanurate foam having furan linkages bound to the backbone of the isocyanurate foam structure, comprising:
- polymerizing in situ either furfuryl alcohol or furfural contemporaneous with the trimerization of an organic polyisocyanate in the presence of an isocyanate trimerization catalyst, the furfuryl alcohol or furfural being present in an amount ranging from about fifteen to fifty parts by weight thereof per one hundred parts by weight of the organic polyisocyanate.
A process for the manufacture of a foam product consisting essentially of an isocyanurate foam having furan linkages bound to the backbone of the isocyanurate foam structure, comprising:
- polymerizing in situ either furfuryl alcohol or furfural contemporaneous with the trimerization of an organic polyisocyanate in the presence of an isocyanate trimerization catalyst and an acid catalyst.
Dependencies are inferred from the claim text.