摘要:
Catalyst systems for the copolymerization of carbon monoxide and α-olefinically unsaturated compounds contain, as essential components, a) a metal complex of the formula (I) where R1 to R4 are each linear or branched C2- to C28-alkyl, C3- to C14-cycloalkyl or alkylaryl where the alkyl moiety is of 1 to 28 carbon atoms and the aryl moiety is of 6 to 15 carbon atoms, each of which is substituted by at least one polar protic or ionic functional group based on elements of groups IVA to VIA of the Periodic Table of Elements, and b) if required, one or more Lewis or protic acids or a mixture of Lewis and protic acids.
摘要:
Water-soluble transition metal complexes of the formula (I) where R1 to R4 are linear or branched C2- to C28-alkyl, C3- to C14-cycloalkyl or alkylaryl where the alkyl moiety is of 1 to 28 carbon atoms and the aryl moiety is of 6 to 15 carbon atoms, each of which is substituted by at least one polar protic or ionic functional group based on nonmetallic elements of groups IVA to VIA of the Periodic Table of Elements.
摘要:
Transition metal complexes having bulky ligand systems and the formula (I) where R2, R4 are C4-C16-heteroaryl or C6-C16-aryl bearing C4-C16-heteroaryl or C6-C16-aryl substituents in the two vicinal positions relative to the point of linkage to Na or Nb and M is a metal of group VIIIB of the Periodic Table of the Elements, are described.
摘要:
In a process for the transition-metal-catalyzed preparation of polymers having a syndiotactic or predominantly syndiotactic structure from vinylaromatic monomers and a process for preparing block copolymers from vinylaromatic monomers and olefinically unsaturated polar monomers, use is made of transition metal compounds of the formula (I) where the substituents and indices have the following meanings: M is scandium, yttrium, lanthanum or a lanthanide metal, R′″ is &mgr;-C3-C20-alkyl, L is a low molecular weight organic compound having Lewis basicity, where n=1 or 0 and at least one n in (I) is 0, m is 1 or 2.
摘要翻译:在过渡金属催化的由乙烯基芳族单体制备具有间同立构或主要间同立构结构的聚合物的方法和由乙烯基芳族单体和烯属不饱和极性单体制备嵌段共聚物的方法中,使用下式的过渡金属化合物 I)其中取代基和指数具有以下含义:M是钪,钇,镧或镧系元素,R“'是多元C 3 -C 20 - 烷基,L是具有路易斯碱性的低分子量有机化合物,其中 n = 1或0,(I)中的至少一个n为0,m为1或2。
摘要:
In functionalized linear alternating carbon monoxide copolymers of carbon monoxide and at least one 1-alkene (A), compound (A) is an aryl derivative substituted with at least one terminal allyl and/or homoallyl moiety and containing one or more polar groups, with the proviso that 4-allylanisole is excluded.
摘要:
A process for preparing linear, alternating carbon monoxide copolymers, in which at least one olefinically unsaturated compound having from two to twenty carbon atoms (component K1) and carbon monoxide are copolymerized in the presence of a) metal complexes, b) if desired, a protonic or Lewis acid, and c) if desired, a hydroxyl compound, comprises metering into the copolymerization, as it proceeds, at least one olefinically unsaturated compound having from two to twenty carbon atoms (component K2≠component K1) in the form of pulses, i.e. as a regular or irregular sequence of feed, for which the term pulse is used, and non-feed. Carbon monoxide copolymers obtainable from said process are used for producing fibers, films or moldings, and the fibers, films and moldings produced from these polymers are described.
摘要:
In a process for the preparation of derivatized carbon monoxide copolymers, functionalized linear, strictly alternating carbon monoxide copolymers of carbon monoxide, at least one 1-alkene (A), where (A) is an aryl compound substituted by at least one terminal allyl or homoallyl moiety and by at least one hydroxyl or amino group, or an a-olefinically unsaturated aliphatic alcohol, and, if desired, at least one C2-C20-1-alkene (B) are reacted with an organic compound (C) having at least one electrophilic group in an aprotic organic solvent.
摘要:
The invention relates to the production of homopolymers, co-copolymers or block copolymers from cycloolefinic monomer units characterized in that polymerization occurs in the presence of a catalyst of general formula (I), and optionally in the presence of an additive, wherein the substituents and indices have the following meaning: M is a metal from group VIII B of the periodic table of elements; E1, E2 are independently from each other an element from group V A of the periodic table of elements; Z is a bridging structural unit; Ar stands for annelated aryl units independent of each other; L1, L2 stands for formally uncharged Lewis base ligands; X means monovalent or bivalent anions; k means 1 or 2; l, m, n represent 1 or 2, whereby m×n=1.
摘要:
The invention relates to thermoplastic molded masses, comprising A) 10 to 97 wt. % of at least one thermoplastic polyester, B) 1 to 30 wt. % of a flame-resistant agent combination with, based on 100 wt. % B), b1) 20 to 99 wt. % of a halogenated flame resistant agent, b2) 1 to 80 wt. % of a antimony oxide, C) 0.01 to 3 wt. % of at least one polyamide, D) 0.01 to 2 wt. % of at least one nigrosin, E) 0.01 to 3 wt. % of at least one anti-dripping agent and F) 0 to 70 wt. % of further adjuncts, whereby the sum of components A) to F) is 100%.
摘要:
The invention relates to thermoplastic moulding materials containing A) 10–98 wt. % of at least one thermoplastic polyester, B) 1–30 wt. % of a flame resistant material combination made of 100 wt. % B), b1) 20 99 wt. % of a flame resistant material containing halogen b2) 1–80 wt. % of an antimonoxide, C) 0.01–5 wt. % of tartaric acid or tartrates or a mixture thereof, D) 0 is 5 wt.-% of at least one stabilisator containing phosphorous, E) 0–70 wt.-% of additional materials, whereby the sum of the wt % of the components A)–E) is 100%.