公开(公告)号：US20220403155A1

公开(公告)日：2022-12-22

申请号：US17771535

申请日：2020-10-29

Applicant: Arkema Inc.

Inventor： Kevin R. Yocca ,  Eric J. Peterson

IPC: C08L63/00 ,  C08L33/08 ,  C08L33/10 ,  C08L23/28 ,  C08J9/00 ,  C08J9/04 ,  C08J9/228

Abstract: A method of reducing foamed density that results in a foamed polyvinyl chloride (PVC) component exhibiting reduced density. The foamed PVC component contains at least a PVC resin and a process aid blend. The process aid blend contains from 1 weight % to 60 weight % (based on the weight of the blend) of a functionalized process aid, and from 99 weight % to 40 weight % (based on the weight of the blend) of a non-functionalized process aid. The functionalized process aid includes at least one base polymer functionalized with a reactive epoxy, hydroxyl, β-keto ester, β-keto amide, or carboxylic acid functional group. The foamed PVC component containing the process aid blend has a lower density than a reference foamed PVC component made using the same process conditions and additives, but which contains only non-functionalized process aid and not the functionalized process aid.