摘要:
Propylene polymers containing from 0 to 2.5% by weight of C2-C10-olefin comonomers have an Mw of from 350,000 to 1,000,000 g/mol, an Mw/Mn of from 4 to 10, a proportion by weight of the polymer fraction having a viscosity number of from 500 to 1400 ml/g of from 20 to 80% of the total polymer and a proportion by weight of a polymer fraction having a viscosity number of from 200 to 400 ml/g of from 80 to 20% of the total polymer and an isotactic sequence length of from 50 to 100.
摘要:
The invention relates to a high-molecular-weight copolymer comprising ethylene and propylene units which has an ethylene content in the range from 1 to 10% by weight, a melt flow rate MFR (230/5) of
摘要:
A gaseous mixture of steam and air, a gaseous mixture of steam and nitrogen, or pure steam are passed around polyolefin granules in a deodorizing apparatus. The result is that the polyolefin granules have markedly improved properties with respect to odor and taste, and these are retained in moldings produced from the granules.
摘要:
Molding compositions made from a high-molecular-weight propylene polymer with a melt mass-flow rate MFR of from 0.3 to 1 g/10 min, to ISO 1133 at 230° C. and 5 kg, and with a proportion of β modification crystallites in the range from 2 to 20% by weight. The molding compositions of the invention preferably comprise a quinacridone pigment as nucleating agent. The high-molecular-weight propylene polymer used preferably comprises a high-molecular-weight propylene copolymer with up to 30% by weight of other copolymerized olefins having up to 10 carbon atoms. One of the uses of the molding compositions of the invention is as materials for pipes.
摘要:
Molding compositions made from a high-molecular-weight propylene polymer with a melt mass-flow rate MFR of from 0.3 to 1 g/10 min, to ISO 1133 at 230° C. and 5 kg, and with a proportion of β modification crystallites in the range from 2 to 20% by weight. The molding compositions of the invention preferably comprise a quinarcidone pigment as nucleating agent. The high-molecular-weight propylene polymer used preferably comprises a high-molecular-weight propylene copolymer with up to 30% by weight of other copolymerized olefins having up to 10 carbon atoms. One of the uses of the molding compositions of the invention is as materials for pipes.
摘要:
a) from 50 to 85% by weight of a copolymer of propylene (A) with 1-alkenes comprising from 20 to 80% by weight of a high molecular weight copolymer of propylene (I) containing from 2.0 to 7.0% by weight of copolymerized 1-alkene and having a viscosity of from 500 to 1200 ml/g and from 20 to 80% by weight of a low molecular weight copolymer of propylene (II) containing from 4.0 to 10.0% by weight of copolymerized 1-alkene and having a viscosity of from 200 to 450 ml/g, b) from 5 to 10% by weight of a polymer of ethylene (B) and c) from 10 to 40% by weight of a rubber-like copolymer of propylene and a 1-alkene (C) containing from 30 to 70% by weight of copolymerized 1-alkene have a melt flow index (MFI) at 230° C. under a weight of 5 kg of from 0.1 to 5 g/10 min, a molecular weight distribution (Mw/Mn) of from 6 to 20 and a total 1-alkene content of from 4 to 15% by weight.