摘要:
The present invention relates to a low density polyethylene having a molecular weight distribution Mw/Mn which is greater than 15, a storage modulus G′ (5 kPa) which is above 3000 and a vinylidene content which is at least 15/100k C, compositions, a process for production of the low density polyethylene, a continuous ethylene polymerization method for introducing vinylidene in a low density polyethylene, a method for an extrusion coating process, an article, e.g. an extrusion article, and use in extrusion coating.
摘要:
The invention is directed to a silane crosslinkable polymer composition which comprises a polyolefin (a) bearing hydrolysable silane group(s) containing units. The polymer composition is suitable for producing crosslinkable articles, preferably one or more layers of a cable. The formed article, preferably a cable, is preferably crosslinked before the end use thereof.
摘要:
The invention relates to a cable comprising a conductor surrounded by at least one crosslinkable layer comprising a polymer composition which comprises (a) a polyolefin bearing hydrolysable silane groups and a silanol condensation catalyst compound, as well as to a production process of such cable.
摘要:
The invention is directed to a silane crosslinkable polymer composition which comprises a polyolefin (a) bearing hydrolysable silane group(s) containing units. The polymer composition is suitable for producing crosslinkable articles, preferably one or more layers of a cable. The formed article, preferably a cable, is preferably crosslinked before the enduse thereof.
摘要:
The present invention relates to a polyolefin composition with increased resistance to degradation caused by ClO2-containing water and to a pipe or a fitting made of such a polyolefin composition. The polyolefin composition comprises a polyolefin base resin (A), an antioxidant (B) having a chroman-6-ol structure, and an antioxidant (C) having a phenolic structure and the molecule comprises at least one ester group. The present invention further relates to the use of the polyolefin composition for the production of a pipe or a fitting and to the use of the polyolefin composition for increasing the lifetime of a pipe or a fitting providing the polyolefin composition with resistance against degradation caused by contact with ClO2-containing water.
摘要:
A polyolefin pipe having a polyolefin base resin (A) including a lower molecular weight fraction and a higher molecular weight fraction, stabilized with at least one stabilizer (B) having a formula: and at least one stabilizer (C) having a formula: wherein the substituents are as described in the specification. The composition demonstrates acceptable stability and low migration of additional additives from the pipe.
摘要:
Coating composition comprising an ethylene copolymer containing not more than 5 mole-% comonomer, whereby the fraction of the ethylene copolymer having a molecular weight of 300 000 g/mol-600 000 g/mol has a methyl branching of more than 4.0 Methyl per 1000 C as determined by SEC/FT-IR analysis.
摘要:
The present invention relates to a polyolefin composition with increased resistance to degradation caused by ClO2-containing water and to a pipe or a fitting made of such a polyolefin composition. The polyolefin composition comprises a polyolefin base resin (A), an antioxidant (B) having a chroman-6-ol structure, and an antioxidant (C) having a phenolic structure and the molecule comprises at least one ester group. The present invention further relates to the use of the polyolefin composition for the production of a pipe or a fitting and to the use of the polyolefin composition for increasing the lifetime of a pipe or a fitting providing the polyolefin composition with resistance against degradation caused by contact with ClO2-containing water.
摘要:
The present invention relates to a foamed polypropylene composition comprising a propylene homo- and/or copolymer and glass fibres, wherein (i) the composition has a density of 50 to 950 kg/m3, (ii) the tensile modulus tm(extrusion direction) measured according to ISO 527 in extrusion direction and the k-value measured according to ASTM C-518 satisfy the relation: tm(extrusion direction) [MPa]/k [W/mK]≧9000 MPa·mK/W, to the use of said composition for the production of an insulating layer and to an article comprising said composition.
摘要翻译:本发明涉及包含丙烯均聚物和/或共聚物和玻璃纤维的发泡聚丙烯组合物,其中(i)组合物的密度为50至950kg / m 3,(ii)拉伸模量t m(挤出方向) 根据ISO 527在挤出方向测量,并且根据ASTM C-518测量的k值满足关系式:tm(挤出方向)[MPa] / k [W / mK]≥9000MPa·mK / W,使用 的用于制备绝缘层的组合物和包含所述组合物的制品。
摘要:
The present invention deals with coated pipes having a layer of multimodal polyethylene. The multimodal ethylene copolymer is a copolymer of ethylene with one or more alpha-olefin comonomers having from 4 to 10 carbon atoms and has a weight average molecular weight of from 70000 g/mol to 250000 g/mol and a melt index MFR2 of from 0.05 g/10 min to 5 g/10 min, a melt index MFR5 of from 0.5 to 10 g/10 min and a density of from 945 kg/m3 to 958 kg/m3. The coatings have a high stiffness, good properties at elevated temperatures and acceptable stress-cracking properties.
摘要翻译:本发明涉及具有多峰聚乙烯层的涂覆管。 多峰乙烯共聚物是乙烯与一种或多种具有4-10个碳原子的α-烯烃共聚单体的共聚物,其重均分子量为70000g / mol至250000g / mol,熔体指数MFR2为0.05 g / 10分钟至5g / 10min,熔体指数MFR5为0.5至10g / 10min,密度为945kg / m 3至958kg / m 3。 涂层具有高刚度,在高温下具有良好的性能和可接受的应力开裂性能。