Abstract:
The present invention relates to a new polymer composition suitable for a semiconductive devices. Moreover, the present invention is related to a process for producing said composition as well as to a use of said composition. Further, the invention is also related to an article, preferably a cable, comprising said composition.
Abstract:
Polypropylene having a melting temperature (T m ) of at least 151.0 °C, a melt flow rate MFR 2 (230 °C) of more than 2.0 g/10min, a xylene cold soluble fraction (XCS) of not more than 1.5 wt.-%, regiodefects of equal or more than 0.4 mol.-% determined by 13 C-spectroscopy, and a number average molecular weight (Mn) of not more than 110 kg/mol.
Abstract:
Polypropylene composition comprising a polypropylene and an α-nucleating agent, wherein the polypropylene composition has •a comonomer content of equal or below 1.0 wt.-%, • erythro regiodefects of more than 0.1 mol.-%, and •at least 9.0wt-% of a crystalline fraction crystallizing in the temperature range of above 160 to 170 °C, wherein said fraction is determined by the stepwise isothermal segregation technique (SIST).
Abstract:
Polypropylene composition comprising a polypropylene base resin whereby the polypropylene base resin has a MFR (2.16 kg, 230 °C, ISO 1133) of 8 to 24 g/10min and a LAOS-NLF > 2.8 whereby LAOS - NLF = |G' 1 /G' 3 | where G' 1 - first order Fourier Coefficient, G' 3 - third order Fourier Coefficient.
Abstract:
Cable layer comprising a propylene polymer composition comprising (a) a polypropylene (A) (b) an elastomeric copolymer (E) comprising units derived from propylene and ethylene and/or C4 to C20 α-olefin and (c) a polar ethylene polymer (C) wherein the cable layer and/or the propylene polymer composition has a gel content of equal or more than 0.20 wt.-%.
Abstract:
Polypropylene composition comprisinga heterophasic propylene copolymerand a polyethylene, said heterophasic propylene copolymer comprises a matrix comprising a random propylene copolymer and an elastomeric propylene copolymerbeing dispersed in said matrix,wherein furthersaid heterophasic propylene copolymer isα-nucleated andhas a melt flow rate in the range of equal or more than 0.5 to equal or below 6.0g/10min.
Abstract:
The present invention relates to a polypropylene composition showing a high melt flow rate and high melt strength while maintaining high impact strength. The composition of the present invention is obtainable by using a low molecular weight linear isotactic polypropylene as melt flow enhancer for a high molecular weight polypropylene having a high melt strength and impact strength. The inventive composition could be used for the production of different articles.
Abstract:
Heterophasic polypropylene resin having a MFR (2.16 kg, 230 °C) of at least 1.0 g/1 Omin, determined according to ISO 1133, comprising a propylene random copolymer matrix phase (A), and an ethylene-propylene copolymer rubber phase (B) dispersed within the matrix phase, wherein the heterophasic polypropylene resin has a fraction soluble in p- xylene at 25°C (XCS fraction) being present in the resin in an amount of 15 to 45 wt% whereby the XCS fraction has an ethylene content of 25 wt% or lower, and a fraction insoluble in p-xylene at 25 0C (XCU fraction), said heterophasic polypropylene resin being characterised by a strain hardening factor (SHF) of 1.7 to 4.0 when measured at a strain rate of 3.0 s -1 and a Hencky strain of 3.0.
Abstract:
The present invention is directed to a first polypropylene composition comprising a propylene copolymer as matrix phase (A) comprising a homo/random/block copolymer consisting of a) a propylene homopolymer (A1); b) a propylene random copolymer (A2); and c) an ethylene-propylene rubber (EPR) (A3) and a polyolefin (B) dispersed in the matrix phase (A), which comprises hydrolysable silicon-containing groups. The present invention is furthermore directed to a second polypropylene composition comprising a matrix phase (A) comprising a propylene homo- or copolymer with an impact strength at + 23 °C of at least 40.0 kJ/m 2 in a Charpy notched test according to ISO 179-1 eA:2000 and a polyolefin (B) dispersed in the matrix phase (A), which comprises hydrolysable silicon-containing groups. The invention is furthermore directed to a production process for the polypropylene compositions and an article made thereof.
Abstract:
The present invention is concerned with a polypropylene composition comprising a polypropylene base resin, the polypropylene composition having - a XHU content of less than 1.25 wt.-%; - a F30 melt strength of at least 30 cN, determined in the Rheotens test at 200°C; and - a melt extensibility v30 of at least 200 m/s, determined in the Rheotens test at 200°C. In another aspect the present invention is concerned with a polypropylene composition having an MFR (2.16 kg, 230 °C, ISO 1133) of 1.0 to 5.0 g/10 min comprising a polypropylene base resin, the polypropylene base resin being obtainable by producing an intermediate polypropylene having an MFR (2.16 kg, 230 °C, ISO 1133) of 0.5 to 2.5 g/10 min in the presence of an asymmetric catalyst; mixing the intermediate polypropylene with peroxide and at least one diene at a temperature of 20 to 90 °C for at least 2 minutes to form a pre-mixed material; melt mixing the pre-mixed material in a melt mixing device at a barrel temperature in the range of 180 to 300 °C, whereby the melt mixing device is a melt mixing device includes a feed zone, a kneading zone and a die zone, whereby an initial barrel temperature T1 is maintained in the feed zone, a barrel temperature T2 is maintained in the kneading zone and a die barrel temperature T3 is maintained in the die zone, whereby the barrel temperatures T1, T2, and T3 satisfy the following relation: T1