Patent ID: 9624362
Date: 2017-04-18
CPC Classifications: C08F,C08L

Claim:
1. A polyolefin composition comprising (i) a processing aid for polyolefins comprising an ethylene/tetrafluoroethylene copolymer as the only fluoropolymer, the ethylene/tetrafluoroethylene copolymer having a melting point of 180° C. to 230° C., wherein the ethylene/tetrafluoroethylene copolymer consists of an ethylene-based polymerization unit (a), a tetrafluoroethylene-based polymerization unit (b), and a polymerization unit (c) based on a monomer represented by the following formula (1): wherein X represents a hydrogen atom or a fluorine atom, and Y represents a fluoroalkyl group, the copolymer has a mol % ratio (a)/(b) of the polymerization unit (a) to the polymerization unit (b) of 10:90 to 50:50, and the copolymer contains the polymerization unit (c) in a proportion of 0.01 to 10 mol % based on the total amount of the polymerization unit (a) and the polymerization unit (b), and (ii) a polyolefin, the processing aid for polyolefins constituting 0.0005 to 10 wt % of the total weight of the composition, the processing aid for polyolefins being dispersed as particles in the polyolefin, the processing aid for polyolefins having an average dispersed particle size of 10 μm or smaller in the polyolefin, wherein the ethylene/tetrafluoroethylene copolymer is the only fluoropolymer present in the polyolefin composition.