A NEW NON-REACTIVE POLYMER PROCESSING ADDITIVE (PPA) FOR USE WITH HALS AND OTHER CHEMICALLY INTERACTING ADDITIVES

摘要

Polymer processing additives are used to reduce melt fracture, increase the processing window and eliminate die lip build-up and gels in polyolefins. There are additives that can interfere with the performance of the PPA by four main mechanisms - adsorption, abrasion, site competition and chemical reaction. Strong bases such as hindered amine light stabilizers (HALS) can cause the PPA to lose effectiveness due to both site competition and chemical reaction. Introduced is a next generation, non-reactive PPA that has improved performance compared to conventional materials.