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AssigneeTexaco Inc.
InventorsGeorge P. Speranza, Michael Cuscurida, Richard J. G. Dominguez
Estimating the term…
Reaction injection molded elastomers made from polymer polyols derived by reacting a liquid terephthalic polyester polyol with an organic polyisocyanate in the presence of a polyether polyol solvent are described. The liquid terephthalic polyester polyol may be made by reacting residue or scrap polyethylene terephthalate (PET) with an oxyalkylene glycol. The oxyalkylene glycol is preferably either diethylene glycol alone or a mixture of diethylene glycol and at least one other oxyalkylene glycol. The liquid terephthalic polyester polyol is preferably distilled to remove ethylene glycol. RIM elastomers made from these polymer polyols have improved hot tear (green strength) and final tear properties than prior art elastomers.
A reaction injection molded elastomer made by reacting in a closed mold ingredients comprising a polyol derived from recycled polyethylene terephthalate, an amine terminated chain extender and a polyisocyanate wherein
A reaction injection molded elastomer made by reacting in a closed mold ingredients comprising a polymer polyol, an amine terminated chain extender and a polyisocyanate where the polymer polyol is made by the process comprising reacting
A method of making a reaction injection molded elastomer comprising reacting in a closed mold a polymer polyol, an amine terminated chain extender and a polyisocyanate, where the polymer polyol is made by the process comprising reacting
Dependencies are inferred from the claim text.