摘要:
The invention is directed to a use of a polymer composition comprising an ethylene polymer for producing a crosslinked pipe, a process for producing a crosslinked pipe and to a crosslinked pipe comprising a crosslinked polymer composition which comprises a crosslinked ethylene polymer.
摘要:
The present invention relates to a polyethylene composition comprising a polyethylene base resin, which comprises a. an ethylene copolymer as fraction (A), and b. an ethylene homo- or copolymer as fraction (B), with fraction (A) having a lower molecular weight than fraction (B), wherein the polyethylene base resin is obtainable in a polymerisation process in which a single-site catalyst. (SSC) is used in the polymerisation of at least one of fractions (A) and (B), and the base resin has (i) a density of below 940 kg/m3, and (ii) a MFR2 at 190 ° C./2.16 kg of 0.001 to 10 g/10 min, and the composition has (iii) a flexural modulus of from 300 to 820 MPa, and to a process for the production of such a composition, and to a pipe produced from such a composition.
摘要:
The present invention relates to a polyethylene composition comprising a base resin which comprises (a) an ethylene homo- or copolymer fraction (A); and (b) an ethylene homo- or copolymer fraction (B), wherein (i) fraction (A) has a lower average molecular weight than fraction (B); (ii) the base resin has a density of 940 to 947 kg/m3; (iii) the polyethylene composition has an MFR5 of 0.1 to 0.5 g/10 min; and (iv) the polyethylene composition has an SHI(2.7/210) of 10 to 49. Furthermore, the present invention relates to an article, preferably a pipe comprising said composition and to the use of said composition for the production of an article, preferably a pipe.
摘要:
A master batch for the production of cross-linked polymer pipes is described. The master batch comprises carbon black and a polymer carrier consisting of a Ziegler-Natta catalyzed polyethylene with a density of at least 0.940 g/cm3. A cross-linkable polymer composition comprising the master batch and a chromium catalyzed polyethylene base polymer, and a cross-linked polyethylene pipe made by cross-linking the cross-linkable polymer composition are also described.
摘要翻译:描述了用于生产交联聚合物管的母料。 母料包含炭黑和由密度为至少0.940g / cm 3的齐格勒 - 纳塔催化聚乙烯组成的聚合物载体。 还描述了包含母料和铬催化的聚乙烯基础聚合物的交联聚合物组合物和通过交联可交联聚合物组合物制备的交联聚乙烯管。
摘要:
A single site catalysed ethylene polymer including ethylene and optionally at least one comonomer having a Mw/Mn of less than 5 and wherein the total amount of unsaturations of the ethylene polymer is at least 0.8.
摘要:
The present invention relates to a polyethylene composition comprising a base resin which comprises (a) an ethylene homo- or copolymer fraction (A); and (b) an ethylene homo- or copolymer fraction (B), wherein (i) fraction (A) has a lower average molecular weight than fraction (B); (ii) the base resin has a density of 940 to 947 kg/m3; (iii) the polyethylene composition has an MFR5 of 0.1 to 0.5 g/10 min; and (iv) the polyethylene composition has an SHI(2.7/210) of 10 to 49. Furthermore, the present invention relates to an article, preferably a pipe comprising said composition and to the use of said composition for the production of an article, preferably a pipe.
摘要:
The invention relates to a polyethylene composition for the production of peroxide crosslinked polyethylene and a method for the production thereof. The invention further relates to the use of such a polymer composition and to a peroxide crosslinked polyethylene pipe made from the polyethylene composition.
摘要:
The present invention deals with polymer compositions suitable for making pipes. The compositions comprise a multimodal copolymer of ethylene and one or more alpha-olefins having from 4 to 10 carbon atoms wherein the multimodal ethylene copolymer has a density of from 924 to 935 kg/m3, a melt index MFR5 of from 0.5 to 6.0 g/10 min, a melt index MFR2 of from 0.1 to 2.0 g/10 min and a shear thinning index SHI27/210 of from 2 to 50. In addition the multimodal copolymer comprises: (A) from 30 to 70% by weight, based on the combined amount of components (A) and (B), of a low molecular weight ethylene polymer selected from ethylene homopolymer and a copolymer of ethylene and one or more alpha-olefins having from 4 to 10 carbon atoms and having a weight average molecular weight of from 5000 to 100000 g/mol and a density of from 945 to 975 kg/m3; and (B) from 30 to 70% by weight, based on the combined amount of components (A) and (B), of a high molecular weight copolymer of ethylene and one or more alpha-olefins having from 4 to 10 carbon atoms and having a weight average molecular weight of from 100000 to 1000000 g/mol and a density of from 890 to 929 kg/m3.
摘要翻译:本发明涉及适于制造管道的聚合物组合物。 组合物包含乙烯和一种或多种具有4至10个碳原子的α-烯烃的多峰共聚物,其中多峰乙烯共聚物的密度为924至935kg / m 3,熔体指数MFR 5为0.5至6.0g / 10分钟,熔体指数MFR 2为0.1至2.0g / 10min,剪切稀化指数SHI27 / 210为2至50.此外,多峰共聚物包含:(A)30至70重量%,基于 选自乙烯均聚物和乙烯与一种或多种具有4至10个碳原子并且具有重均分子量的α-烯烃的共聚物的低分子量乙烯聚合物的组分(A)和(B)的组合量 为5000至100000g / mol,密度为945至975kg / m 3; 和(B)30至70重量%,基于组分(A)和(B)的组合量,乙烯和一种或多种具有4至10个碳原子的α-烯烃的高分子量共聚物和 重均分子量为100000〜1000000g / mol,密度为890〜929kg / m 3。
摘要:
A multimodal polymer composition for pipes is disclosed. The polymer is a multimodal polyethylene with a density of 0.930-0.965 g/cm3, an MFR5 of 0.2-1.2 g/10 min, an Mn of 8000-15000, an Mw of 180-330×103, and an Mw/Mn of 20-35, said multimodal polyethylene comprising a low molecular weight (LMW) ethylene homopolymer fraction and a high molecular weight (HMW) ethylene copolymer fraction, said HMW fraction having a lower molecular weight limit of 3500, and a weight ratio of the LMW fraction to the HMW fraction of (35-55):(65:45).
摘要:
The present invention is directed to the use of compound (A) and compound (B) in a polyethylene composition for increasing the lifetime of a pipe made of said polyethylene composition which is in permanent contact with chlorinated water, wherein compound (A) has the following formula (I): wherein—R6, R7 and R8 independently are non-substituted or substituted aliphatic or aromatic hydrocarbyl radicals which may comprise OH-groups, X1, X2, and X3 independently are H or OH, with the proviso that at least one of X1, X2, and X3 is OH, and the entire molecule does not comprise an ester group; wherein compound (B) has the following formula (II): wherein R1, R2, R3, R4 and R5 independently are H, or non-substituted or substituted aliphatic or aromatic hydrocarbyl radicals which may comprise heteroatoms, and wherein the base resin of said polyethylene composition consists of a polyethylene homo- or copolymer.