Polyurethane rim elastomers obtained with hydroxyl-containing heterocyclic organotin catalysts
AssigneeAir Products and Chemicals, Inc.
InventorsJohn E. Dewhurst, James D. Nichols
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Abstract
The invention relates to reaction injection molded elastomers derived from high molecular weight polyether polyols, an aromatic diamine chain extender, a polyisocyanate and a hydroxyl-containing organotin catalyst. The reaction injection molded (RIM) elastomers of this invention are useful, for example, as automobile body parts.
Claims8
A reaction injection molded elastomer made by reacting in a closed mold a composition comprising polyether polyols greater than 500 average molecular weight, an aromatic diamine chain extender, an aromatic polyisocyanate and an organotin catalyst of the following general formula:
- ##STR3## where R is a C.sub.1 -C.sub.8 alkyl or an aryl group,
- Y is ##STR4## X is --S-- or --O--.
A reaction injection molded elastomer made by reacting in a closed mold a composition comprising polyether polyols greater than 500 average molecular weight, an amine terminated chain extender, an aromatic polyisocyanate and an organotin catalyst of the following general formula ##STR5## where R is butyl or octyl and
- Y is --CH.sub.2 --CH(OH)--CH.sub.2 --.
Dependencies are inferred from the claim text.