Patent ID: 6294604
Filing Date: 2001-09-25
Classification: C08K,C08L

Abstract:
An extrudable composition comprising(A) a predominant amount of an extrudable thermoplastic polymer selected from the group consisting of hydrocarbon polymers, polyamides, polyurethanes, polyesters, polycarbonates, polyketones, polyureas, polyacrylates and polymethacrylates, and(B) an amount of a stabilized processing aid effective to reduce melt defects in the extrudable thermoplastic polymer, the stabilized processing aid comprising(i) a fluorocarbon polymer,(ii) a poly(oxyakylene) polymer having the general formula:A((OR.sup.1).sub.x OR.sup.2).sub.ywhere A is an active hydrogen-free residue of a low molecular weight initiator compound having a plurality of active hydrogen atoms, (OR.sup.1).sub.x is a poly(oxyalkylene) chain in which each R.sup.1 is a radical that can be the same or different and x is the number of oxyalkylene groups in the chain, each R.sup.2 is H or an organic radical that can contain one or more heteroatoms, and y is 2 or 3,(iii) magnesium oxide, and(iv) optionally a stabilizer.