Urethane-modified polyisocyanurate foams from oxyalkylated aniline and aromatic polyisocyanates
AssigneeTexaco Development Corporation
InventorsThomas H. Austin, George P. Speranza
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Abstract
Covers novel urethane-modified polyisocyanurate rigid foams comprising the reaction product obtained by bringing together in the presence of a blowing agent an aromatic polyisocyanate, an isocyanurate group formation catalyst, and a polyol comprising a specific alkylene oxide adduct of aniline. The novel foams are useful in preparing rigid foam material such as panels, slabs, or sprayed foam surfaces.
Claims6
A urethane-modified polyisocyanurate rigid foam comprising the reaction product obtained by bringing together in the presence of a blowing agent an aromatic polyisocyanate, and an isocyanurate group formation catalyst and a polyol comprising an alkylene oxide adduct of aniline prepared by reacting 2.5-15 moles of alkylene oxide per mole of aniline, with the ratio of said polyol to said aromatic polyisocyanate being 0.1-0.8 equivalent:
- 1.0 equivalent.
A process for preparing a urethane-modified polyisocyanurate rigid foam comprising the steps of mixing and reacting in the presence of a blowing agent and an isocyanurate group formation catalyst an aromatic polyisocyanate and a polyol comprising an alkylene oxide adduct of aniline prepared by reacting 2.5-15 moles of alkylene oxide per mole of aniline, with the ratio of said polyol to said aromatic polyisocyanate being 0.1-0.8 equivalent:
- 1.0 equivalent.
Dependencies are inferred from the claim text.