Polyisocyanurate polymers, dispersions, and cellular and non-cellular polyurethane products prepared therefrom
AssigneeBASF Wyandotte Corporation
InventorsThirumurti Narayan, Gerhard G. Ramlow, Peter T. Kan
Life of this patent
Estimating the term…
Abstract
Polyisocyanurate polymers are prepared by the polymerization of organic polyisocyanates in organic solvents employing trimerization catalysts. After deactivation of the catalysts and removal of the solvents, these polymers may be dispersed in polyols which are employed for the preparation of cellular and non-cellular polyurethane products displaying improved load bearing properties.
Claims18
A process for preparing a polyisocyanurate polymer dispersion by (a) polymerizing a solution of an organic polyisocyanate in an organic solvent in the presence of an effective amount of a trimerization catalyst, (b) deactivating said catalyst, (c) isolating said polymer from said solvent, and (d) dispersing said polymer in a polyol.
Dependencies are inferred from the claim text.