Heavy metal free halogenated polymer compound
AssigneeLubrizol Advanced Materials, Inc.
InventorLi Nie
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Abstract
The disclosed technology relates to chlorinated polyvinyl chloride (CPVC) compounds being free of heavy metals, particularly heavy metals in the form of stabilizer additives, the most common heavy metal being tin.
Claims11
A rigid chlorinated polyvinyl chloride (“CPVC”) polymer composition comprising (a) a CPVC polymer resin having from about 64 to about 67 weight % chlorine, and (b) a stabilizer system containing only from about 0.1 to about 3.0 parts zeolite and optionally a C6 to C12 metal carboxylate, and combinations thereof, wherein the zeolite has a water content of greater than 10 weight percent and a ratio of silicon to aluminum of less than 1.5.
A method of stabilizing a rigid CPVC polymer composition comprising employing in the rigid CPVC polymer composition a stabilizer system containing only from about 0.1 to about 3.0 parts zeolite and optionally a C6 to C12 metal carboxylate, or combinations thereof, wherein the zeolite has a water content of greater than 10 weight percent and a ratio of silicon to aluminum of less than 1.5.
Dependencies are inferred from the claim text.