摘要:
In a process for producing polyethylene having a molecular weight of at least 1 x 106 g/mol as determined by ASTM 4020, ethylene is contacted under polymerization conditions with a slurry of a catalyst composition comprising a particulate support having an average particle size, d50, of less than 58 microns and a Group 4 metal complex of a phenolate ether ligand carried by the support.
摘要翻译:在用ASTM 4020测定分子量至少为1×10 6 g / mol的聚乙烯的生产方法中,乙烯在聚合条件下与包含平均粒径d 50的颗粒状载体的催化剂组合物的浆料接触, 小于58微米的苯酚醚配体和由载体携带的酚盐醚配体的第4族金属络合物。
摘要:
In a process for producing an elongated polyethylene component, such as a fiber or membrane, polyethylene powder having a molecular weight of at least 3 x 105 g/mol as determined by ASTM 4020 is dissolved in a solvent to produce an extrudable solution. The solution is then extruded through a die to form an elongated component and at least part of said solvent is removed from the elongated component. The polyethylene powder used in the process is produced by polymerizing ethylene in the presence of a catalyst composition comprising a Group 4 metal complex of a phenolate ether ligand.
摘要翻译:在生产细长的聚乙烯组分如纤维或膜的方法中,通过ASTM 4020测定的具有至少3×10 5 g / mol的分子量的聚乙烯粉末溶于溶剂中以制备可挤出的溶液。 然后将溶液通过模具挤出以形成细长部件,并且从细长部件移除至少部分所述溶剂。 在该方法中使用的聚乙烯粉末通过在包含酚盐醚配体的第4族金属络合物的催化剂组合物存在下聚合乙烯来制备。
摘要:
Derivatives with amide function obtained by reaction between derivatives of linear, branched or cyclic amines having an amino acid or peptidic structure and para-methoxycinnamic acid or urocanic acid. Application of said compounds as specific solar filters, absorbing about 310 nm and avoiding erythematous phenomena during exposures to the sun and as active principles of dermo-pharmaceutical and cosmetological preparations.
摘要:
A shaped article, suitable for in a prosthetic device, is formed of polyethylene having a molecular weight of at least 3 x 105 g/mol as determined by ASTM 4020, and has a yield strength greater than 20 as determined by DIN EN ISO 527. The polyethylene is produced by polymerizing ethylene in the presence of a catalyst composition comprising a Group 4 metal complex of a phenolate ether ligand.
摘要翻译:适合于假体装置的成型制品由通过ASTM 4020确定的分子量至少为3×105g / mol的聚乙烯形成,并且通过DIN EN ISO 527确定的屈服强度大于20。 聚乙烯通过在包含酚盐醚配体的第4族金属络合物的催化剂组合物的存在下聚合乙烯来制备。
摘要:
In a process for producing high molecular weight polyethylene, ethylene is contacted with a slurry of a catalyst composition comprising a Group 4 metal complex of a phenolate ether ligand under polymerization conditions comprising a temperature of about 20 °C to less than 90 °C and a pressure of about 4 bar to about 40 bar.
摘要:
In a process for producing polyethylene having a molecular weight of at least 3 x 105 g/mol as determined by ASTM 4020, ethylene is contacted under polymerization conditions with a slurry of a catalyst composition in at least one hydrocarbon. The catalyst composition comprises a Group 4 metal complex of a phenolate ether ligand and the slurry includes from about 5 to less than 40 ppm per liter of a compound effective to increase the conductivity of said at least one hydrocarbon.
摘要翻译:在通过ASTM 4020测定的分子量为至少3×10 5 g / mol的聚乙烯的方法中,乙烯在聚合条件下与催化剂组合物在至少一种烃中的浆料接触。 催化剂组合物包含酚盐醚配体的第4族金属络合物,并且该浆料包括每升约5至小于40ppm的有效增加所述至少一种烃的导电性的化合物。
摘要:
In a process for producing polyethylene having a molecular weight of at least 1 x 10 6 g/mol as determined by ASTM 4020, ethylene is contacted under polymerization conditions with a slurry of a catalyst composition comprising a particulate support having an average particle size, d50, of less than 58 microns and a Group 4 metal complex of a phenolate ether ligand carried by the support.
摘要翻译:在通过ASTM 4020测定的分子量至少为1×10 6 g / mol的聚乙烯的方法中,乙烯在聚合条件下与包含平均粒度d 50的颗粒载体的催化剂组合物的浆料接触, 小于58微米的第四族金属络合物和由载体承载的酚盐醚配体的第四族金属络合物。
摘要:
Derivatives of amino-benzoic acids, hydroxy-benzoic acids, cinnamic acids, urocanic acids and benzimidazols have been synthetized. The photoprotector power of each class of compounds has been tested. It is the result of four different isolated or conjugate mechanisms. Mechanism 1: absorption of ultraviolet radiations between 360 nm and 260 nm (UVB and/or UVA). Mechanism 2: prolonged absorption of ultraviolet radiations between 360 nm and 260 nm by preferential fixation and in a prolonged way at the epiderm of the human skin of the compound and this by introducing into their chemical structure sulphured or not, peptidic, amino-acid groups. Mechanism 3: induction of the melanogenesis, natural protection system of the skin. Mechanism 4: selection of a compound which is either liposoluble or hydrosoluble according to the galenic form (solution, emulsion, spray). The present invention claims the chemical structure of new compounds, their synthesis, photoprotective activity and the utilization of all the disclosed compounds in order to avoid photodermatosis consecutive to the administration of medicaments, to the use of cosmetics and/or perfumes by man.
摘要:
In a process for producing polyethylene, ethylene is contacted under polymerization conditions with a slurry of a catalyst composition comprising a particulate support and a Group 4 metal complex of a phenolate ether ligand carried by the support and present in an amount so as to provide about 0.1 to about 35 μιηοΐ of Group 4 metal per gram of the support. The resultant polyethylene has a molecular weight of at least 3 x 105 g/mol as determined by ASTM 4020, an average particle size, d50, of less 300 microns, preferably about 100 to 250 microns, and a span, log 10 (d 90 /d 10 ), of less than 0.4.
摘要翻译:在生产聚乙烯的方法中,乙烯在聚合条件下与包含颗粒载体的催化剂组合物和由载体承载的酚盐醚配体的第4族金属络合物的浆料接触,并且存在的量为约0.1 到约35个多毛虫和特异性; 的第4组金属每克支撑。 所得聚乙烯具有通过ASTM 4020确定的至少3×10 5 g / mol的分子量,平均粒度d 50小于300微米,优选约100至250微米,跨度log 10(d 90 / d 10 ),小于0.4。