HETEROPHASIC POLYOLEFIN COMPOSITION WITH EXCELLENT OPTICAL PROPERTIES

• Main Authors: WANG, Jingbo, POTTER, Elisabeth, LILJA, Johanna, DOSHEV, Petar Emilov, GAHLEITNER, Markus, TRANNINGER, Cornelia Anita
• Format: Patent
• Language: English; French; German
• Published: 05.05.2021
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

Heterophasic polyolefin composition having an MFR of 7 to 100 g/10 min and having a Tm(1) of 150° C. or higher comprising a propylene butylene copolymer matrix phase and a rubber phase selected from ethylene/C3-C12 alpha olefin plastomers the composition being obtainable by blending A) 60.0 to 99.0 wt.-% of a propylene butylene copolymer which comprises monomer units derived from a) propylene in an amount of 88-98 wt.-% b) butylenes in an amount of 2-12 wt.-% with respect to the total weight the propylene butylene copolymer B) 1.0-40.0 wt.-% of ethylene/C3-C12 alpha olefin plastomers having a density of less than 904 kg/m3 and optionally a nucleating agent in an amount of less than 0.25 wt.-% with respect to the total of the heterophasic composition.