Method for the preparation of rigid non-cellular reaction injection molded thermoset polyisocyanurate compositions
AssigneeAtlantic Richfield Company
InventorUsama E. Younes
Life of this patent
Estimating the term…
Abstract
A method for the preparation of a molded reaction injection molded rigid non-cellular polyisocyanurate polymer composition by injecting at least two streams into the mold cavity of a RIM machine to react at temperatures of from about ambient to about 140.degree. C. a formulation comprising at least one stream of an organic di- or polyisocyanate and in a second stream a cyclic alkylene carbonate and a soluble adduct of a tertiary amine and a cyclic alkylene carbonate as catalyst.
Claims10
A method for the preparation of rigid non-cellular reaction injection molded polyisocyanurate thermoset polymer composition which comprises injecting at least two steams via a RIM machine into a mold cavity of the desired configuration to react at temperatures of from about ambient to about 140.degree. C. a reaction mixture comprising at least one stream of an organic di-or polyisocyanate and a second stream of from about 5 to about 50 parts by weight of a cyclic alkylene carbonate, based on 100 parts of the isocyanate-carbonate composition, in the presence of a soluble adduct of a tertiary amine and a cyclic alkylene carbonate as catalyst at a concentration of from about 0.01 to about 5.0 weight percent based on the total composition.
Dependencies are inferred from the claim text.