Stabilization of polyvinyl chloride resins
Abstract
Abstract A POLYVINYL CHLORIDE RESIN STABILIZER COMBINATION HAVING A READILY CONTROLLED TIN CONTENT IS PROVIDED WHICH LESSENS THE DEVELOPMENT OF EARLY DISCOLORATION OF THE RESIN WHEN HEATED AT ELEVATED TEMPERATURES, FOR EXAMPLE, 350*F., COMPRISING A DIORGANOTIN MERCAPTOCARBOXYLIC ACID ESTER AND A DIORGANOTIN OXIDE-ESTER COMPLEX WHICH IS A REACTION PRODUCT OF A DIORGANOTIN OXIDE AND AN ESTER OF AN OXYGEN-CONTAINING ACID. THE ABOVE STABILIZER COMPONENTS CAN BE LIQUIDS OR SOLIDS. HOWEVER, WHERE THE STABILIZER COMPONENTS ARE LIQUID, A HOMOGENEOUS STABLE LIQUID MIXTURE IS FORMED. POLYVINYL CHLORIDE RESIN COMPOSITIONS AND A PROCESS FOR STABILIZING SUCH RESINS ARE ALSO PROVIDED, USING THE ABOVE STABILIZER COMBINATION, THE RESINS HAVING AS A RESULT INCREASED RESISTANCE TO THE DEVELOPMENT OF EARLY DISCOLORATION WHEN HEATED AT ELEVATED TEMPERATURES. A PROCESS ALSO IS PROVIDED FOR PREPARING ORGANOTIN STABILIZER COMPOSITIONS HAVING A LOW TO HIGH TIN CONTENT CONTROLLABLE OVER A WIDE RANGE WITHOUT LIMITATIONS DUE TO STOICHIOMETRIC CONSIDERATIONS.
Inventors
- 👤 Lawrence R Brecker
- 👤 Alfred Thee
Bibliographic Details
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