摘要:
Heterophasic propylene copolymer comprising a matrix (M) being a polypropylene, said polypropylene comprises at least three polypropylene fractions, the three polypropylene fractions differ from each other by the melt flow rate MFR2 (230° C.) and at least one of the three polypropylene fractions has a melt flow rate MFR2 (230° C.) in the range of 1.0 to 15.0 g/10 min, and an elastomeric propylene copolymer dispersed in said matrix, wherein the heterophasic propylene copolymer has a melt flow rate MFR2 (230° C.) of equal or more than 20.0 g/10 min, and the amorphous phase of the xylene cold soluble fraction of the heterophasic propylene copolymer has an intrinsic viscosity of equal or higher than 2.0 dl/g.
摘要:
Process for the production of polypropylene random copolymers containing 2.5 to 5.0 wt % of ethylene as comonomer and having an MFR2 in accordance with ISO 1 133 (230° C., 2.16 kg load) of ≧25 g/10 min to 100 g/10 min and a hexane-solubles content, determined according to FDA CFR 21 §177.1520 below 5 wt %, said process comprising the step of polymerizing propylene and ethylene in the presence of a catalyst system comprising (i) a Ziegler-Natta procatalyst which contains a trans-esterification product of a lower alcohol and a phthalic ester as internal donor and (ii) an organometallic cocatalyst and (iii) an external donor represented by formula (I) or (II) Si(OCH2CH3)3(NR1R2) (I) or Si(OCH3)2(CH3(cyclohexyl) (II) wherein R1 and R2 can be the same or different and represent a hydrocarbon group having 1 to 12 carbon atoms, the polypropylene random copolymers with a low level of odour and taste themselves and their use for injection moulding applications, preferably for thin-wall packaging for food packaging in non-cooking applications and for medical packaging.
摘要:
Heterophasic propylene copolymer comprising —a matrix (M) being a polypropylene, said polypropylene comprises at least three polypropylene fractions, the three polypropylene fractions differ from each other by the melt flow rate MFR2 (230° C.) and at least one of the three polypropylene fractions has a melt flow rate MFR2 (230° C.) in the range of 1.0 to 15.0 g/10 min, and —an elastomeric propylene copolymer dispersed in said matrix, wherein —the heterophasic propylene copolymer has a melt flow rate MFR2 (230° C.) of equal or more than 20.0 g/10 min, and —the amorphous phase of the xylene cold soluble fraction of the heterophasic propylene copolymer has an intrinsic viscosity of equal or higher than 2.0 dl/g.
摘要:
Process for the production of polypropylene random copolymers containing 2.5 to 5.0 wt % of ethylene as comonomer and having an MFR2 in accordance with ISO 1 133 (230° C., 2.16 kg load) of ≧25 g/10 min to 100 g/10 min and a hexane-solubles content, determined according to FDA CFR 21 §177.1520 below 5 wt %, said process comprising the step of polymerizing propylene and ethylene in the presence of a catalyst system comprising (i) a Ziegler-Natta procatalyst which contains a trans-esterification product of a lower alcohol and a phthalic ester as internal donor and (ii) an organometallic cocatalyst and (iii) an external donor represented by formula (I) or (II) Si(OCH2CH3)3(NR1R2) (I) or Si(OCH3)2(CH3(cyclohexyl) (II) wherein R1 and R2 can be the same or different and represent a hydrocarbon group having 1 to 12 carbon atoms, the polypropylene random copolymers with a low level of odor and taste themselves and their use for injection molding applications, preferably for thin-wall packaging for food packaging in non-cooking applications and for medical packaging.