Propylene copolymer compositions with high transparency
AssigneeSaudi Basic Industries Corporation
InventorsRon Reijntjens, Klaas Remerie, Maria Soliman, Henrica Norberta Alberta Maria Steenbakkers-Menting
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Abstract
Propylene copolymer composition comprising a propylene homopolymer (A) as a matrix polymer and a propylene copolymer (B) containing 10-35 wt. % calculated with respect to the amount of B of an olefin other than propylene. The propylene homopolymer and the propylene copolymer are prepared using a Ziegler-Natta catalyst system. The propylene copolymer composition has a transparency higher than 8.
Claims9
A propylene copolymer composition consisting of a propylene homopolymer (A) as a matrix polymer, a propylene copolymer (B) containing 13-25 wt. % calculated with respect to the amount of B of ethylene and optionally, one or more additives, wherein the propylene homopolymer (A) and the propylene copolymer (B) are prepared using a Ziegler-Natta catalyst system, the molecular weight distribution Mw/Mn of each of propylene homopolymer (A) and propylene copolymer (B) is larger than 3 and the propylene copolymer composition has a transparency higher than 8,
- wherein the ratio of the melt flow rate of propylene homopolymer (A) to the melt flow rate of propylene copolymer (B) (MFRA/MFRB) is lower than 50,
- wherein said propylene copolymer composition has a Melt Flow Rate (MFR) higher than 4 and
- wherein the Melt Flow Rate (MFR) is measured in accordance with ISO 1133 using a 2.16 kg weight and at a temperature of 230° C.
An article comprising a propylene copolymer composition consisting of a propylene homopolymer (A) as a matrix polymer, a propylene copolymer (B) containing 10-35 wt. % calculated with respect to the amount of B of an olefin other than propylene and, optionally one or more additives selected from the group consisting of nucleating agents and clarifiers, stabilizers, release agents, fillers, peroxides, plasticizers, anti-oxidants, lubricants, antistatics, cross linking agents, scratch resistance agents, high performance fillers, pigments and/or colorants, impact modifiers, flame retardants, blowing agents, acid scavengers, recycling additives, coupling agents, anti microbials, anti fogging additives, slip additives, anti blocking additives and polymer processing aids, wherein the propylene homopolymer (A) and the propylene copolymer (B) are prepared using a Ziegler-Natta catalyst system, the molecular weight distribution Mw/Mn of each of propylene homopolymer (A) and propylene copolymer (B) is larger than 3 and the propylene copolymer composition has a transparency higher than 8 wherein said article is chosen from the group consisting of a molding, a film, a sheet and a pipe.
Dependencies are inferred from the claim text.