摘要:
The present disclosure relates to a process for synthesizing multi- or dual- headed compositions having the formula R 1 M A [R 2 M A —] N R 1 by employing a sterically hindered compound and an organometallic compound in the presence of a transition metal catalyst. The present disclosure further relates to use of the compositions, as well as the process to make the same, in olefin polymerization.
摘要翻译:本公开内容涉及通过在过渡金属催化剂存在下使用空间位阻化合物和有机金属化合物来合成具有式R 1 MA [R 2 MA] NR 1的多头或双头组合物的方法。 本公开还涉及在烯烃聚合中使用该组合物以及其制备方法。
摘要:
Embodiments of a polyethylene polymer blend having a melt index (l 2 ) 0.950 g/cm3, a melt index (l 2 ) 10 /I 2 ) ≤ 9, and a molecular weight distribution (MWD) of about 2 to about 5; and further comprises about 1% to about 20% by wt. of at least one low density polyethylene resin (LDPE) having a density 2 ) of about 0.1 to about 10 g/min, and an MWD > 3.
摘要:
Methods of preparing organosilica materials, which are a polymer comprising of at least one independent cyclic polyurea monomer of Formula (I) wherein each R 1 is a Z 1 OZ 2 SiZ 4 group, wherein each Z 1 represents a hydrogen atom, a C 1 -C 4 alkyl group, or a bond to a silicon atom of another monomer unit; Z 2 and Z 3 each independently represent a hydroxyl group, a C 1 -C 4 alkyl group, a C 1 -C 4 alkoxy group or an oxygen atom bonded to a silicon atom of another monomer unit; and each Z 4 represents a C 1 -C 8 alkylene group bonded to a nitrogen atom of the cyclic polyurea are provided herein. Methods of preparing and processes of using the organosilica materials, e.g., for gas separation, color removal, etc., are also provided herein.
摘要翻译:制备有机硅材料的方法,其为包含至少一种式(I)的独立的环状聚脲单体的聚合物,其中每个R 1为Z 1 OZ 2 SiZ 4基团,其中每个Z 1表示氢原子,C 1 -C 4烷基或键 到另一个单体单元的硅原子; Z2和Z3各自独立地表示与另一单体单元的硅原子键合的羟基,C1-C4烷基,C1-C4烷氧基或氧原子; 并且各Z4表示与环状聚脲的氮原子键合的C1-C8亚烷基。 本文还提供了使用有机硅材料的方法,例如用于气体分离,除色等。
摘要:
The invention provides a molecular transition metal complex selected from Formula 1, as described herein; an ethylene-based polymer; and a process to form the ethylene-based polymer, said process comprising polymerizing ethylene in the presence of at least one molecular transition metal complex selected from Formula 1, as described herein, and wherein either Z 1 or Z 2 is dative covalent (coordinate) to the metal (M).
摘要:
The instant invention provides a polymerization process for producing ethylene based polymers. In one embodiment, the instant invention provides a polymerization process for producing ethylene based polymers comprising: polymerizing ethylene with optionally one or more a- olefins in the presence of one or more first catalyst systems and optionally one or more second catalyst systems in a single reactor, wherein first catalyst system comprises; (a) one ore more procatalysts comprising a metal-ligand complex of formula (I):
摘要:
The instant invention provides a polymerization process for producing ethylene based polymers. In one embodiment, the instant invention provides a polymerization process for producing ethylene based polymers comprising: polymerizing ethylene with optionally one or more α-olefins in the presence of one or more first catalyst systems and optionally one or more second catalyst systems in in a dual reator system or a multiple reactor system, wherein first catalyst system comprises; (a) one ore more procatalysts comprising a metal-ligand complex of formula (I).
摘要:
The instant invention provides an ethylene based polymer. In one embodiment, the instant invention provides an ethylene based polymer comprising the polymerization reaction product of ethylene with optionally one or more α-olefins in the presence of one or more first catalyst systems and optionally one or more second catalyst systems in a single reactor, wherein first catalyst system comprises; (a) one ore more procatalysts comprising a metal-ligand complex of formula (I):
摘要:
A procatalyst carrier system which includes one or more paraffinic solvents, one or more paraffin-insoluble procatalysts, and optionally one or more cocatalysts wherein the carrier system is in the form of a slurry is provided. Also provided is a process including selecting one or more paraffin-insoluble organometallic procatalysts; adding the one or more procatalysts to a sufficient quantity of paraffmic solvent to form a slurry of the one or more procatalysts in the paraffmic solvent; introducing one or more first cocatalysts into a polymerization reactor; and introducing the slurry into the polymerization reactor; a reaction product of the process and articles made from the reaction product.
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:
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:适用于假体装置中的成型制品由聚乙烯形成,所述聚乙烯具有通过ASTM 4020测定的至少3×10 5 g / mol的分子量,并且具有大于20的屈服强度 如DIN EN ISO 527所测定的。聚乙烯是通过在包含酚盐醚配体的第4族金属配合物的催化剂组合物存在下使乙烯聚合而制得的。 p>