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US 4,301,110 AGranted
Rim elastomers with improved heat distortion and tear properties
AssigneeTexaco Inc.
InventorsMichael Cuscurida, Richard J. G. Dominguez, Doris M. Rice
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AssigneeTexaco Inc.
InventorsMichael Cuscurida, Richard J. G. Dominguez, Doris M. Rice
Estimating the term…
The invention covers a method for making reaction injection molded polyurethanes of improved properties. The elastomeric products having superior heat distortion and tear properties comprise the reaction product of an aromatic polyisocyanate, a high molecular weight polyol and a chain extending agent. Said polyol providing said improved properties is a poly(oxybutyleneoxyethylene) glycol having a molecular weight range of about 2,000-6,000. The polyurethane elastomer is prepared by injecting the above three agents through a RIM head into a mold cavity of the desired configuration. Reaction injection molded elastomers are useful as molded articles of commerce including, but not limited to, vehicle body parts.
In a method for making a polyurethane elastomer of significantly improved heat distortion and tear properties wherein a reaction mixture comprising an aromatic polyisocyanate, a high molecular weight polyol and a chain extending agent comprising a low molecular weight active hydrogen-containing compound of at least a functionality of 2 is injected via a RIM machine into a mold cavity of the desired configuration;
Dependencies are inferred from the claim text.