Zeolites are known to be effective co-stabilizers for polyvinyl chloride (PVC) formulations(1-4). In this paper, theauthors discuss Advera?zeolite co-stabilizers produced by the PQ Corporation, their properties and their use in rigidPVC formulations.Specifically, the performance of commercial Advera 401PS and developmental Advera zeolite co-stabilizers wasstudied in rigid PVC applications. It was found that, depending on the ingredients content of the PVC formulations,15 to 50% of the tin mercaptide stabilizer could be replaced by the Advera zeolite co-stabilizer. The PVCformulations with the Advera zeolite had the same or better thermal stability performance. Since Advera zeolitesare substantially less expensive than the tin stabilizers that they replace, a significant costs savings can be realized.Suggested PVC formulations for the production of PVC siding, sheets, foamed sheets, window profiles and foamedprofiles will be discussed. Work has also been done on the use of the materials in pipes and conduits, but will not becovered in this paper.
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