Method for the preparation of rigid reaction injection molded thermoset polyurethane modified polyisocyanurate compositions
AssigneeArco Chemical Company
InventorUsama E. Younes
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Abstract
A method for the preparation of a molded reaction injection molded rigid polyurethane modified 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 reaction mixture comprising at least one stream of an organic di- or polyisocyanate and a second stream of a cyclic alkylene carbonate, a polyether polyol and a soluble adduct of a tertiary amine and a cyclic alkylene carbonate as catalyst.
Claims12
A method for the preparation of rigid reaction injection molded polyurethane modified polyisocyanurate thermoset polymer composition which comprises injecting at least two streams 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 2 to about 50 parts by weight of a cyclic alkylene carbonate and from about 2 to about 50 parts by weight of a polyether polyol, based on the 100 parts iso- cyanate-carbonate-polyol composition, and 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.