Urethane elastomers

Abstract

Abstract A PROCESS IS PROVIDED FOR MAKING A CROSS-LINKED POLYURETHANE RUBBER BY FORMING A LIQUID REACTION MIXTURE OF A LIQUID POLYMERIC POLYOL REACTANT HAVING DISSOLVED THEREIN A CATALYTIC AMOUNT OF A MERCURIC SALT OF A CARBOXYLIC ACID CONTAINING FROM 2 TO 18 CARBON ATOMS E.G. MERCURIC OCTOATE, NAPTHENATE, STEARATE OR OLEATE, AND AN ORGANIC POLYISOCYANATE REACTANT, AT LEAST ONE OF THESE REACTANTS INCLUDES A POLYFUNCTIONAL COMPONENT FOR CROSS-LINKING HAVING MORE THAN TWO FUNCTIONAL GROUPS SELECTED FROM THE GROUP CONSISTING OF -NCO AND -OH RADICALS. THE REACTANTS MENTIONED ABOVE HAVE AN APPROXIMATELY STOICHIOMETRIC EQUIVALENCE OF -NCO AND -OH RADICALS. THE MIXTURE IS REACTED UNTIL SUBSTANTIALLY ALL THE REACTIVE -NCO AND -OH GROUPS HAVE INTERREACTED WITH ONE ANOTHER. THIS INTERREACTION CONVERTS THE MIXTURE TO A SOLID NON-CELLULAR CROSS-LINKED POLYURETHANE RUBBER SUBSTANTIALLY FREE OF FURTHER REACTIVE GROUPS. THIS INVENTION IS ALSO DIRECTED TO A COMPOSITION CAPABLE OF REACTION WITH A POLYISOCYANATE TO EFFECT A RAPID CURE OF THE SAME. THIS COMPOSITION COMPRISES A LIQUID ORGANIC POLYOL HAVING A MINOR AMOUNT OF SAID MERCURIC SALT DISSOLVED THEREIN.

Inventors

• 👤 Janis Robins

Bibliographic Details