-
公开(公告)号：US5280058A
公开(公告)日：1994-01-18
申请号：US49685
申请日：1993-04-16
摘要： The present invention is an improvement upon a process for hydrogenating a diene polymer by contacting the polymer in the presence of hydrogen with a titanium hydrogenation catalyst. The improvement comprises preventing discoloration of the hydrogenated polymer by treating it with water, a peroxide or alcohol in the absence of oxygen and adding a non-phenolic antioxidant to the polymer.
-
2.发明授权Selective hydrogenation of conjugation diolefin polymers with rare earth catalysts 失效用稀土催化剂选择性氢化共轭二烯烃聚合物
公开(公告)号：US5177155A
公开(公告)日：1993-01-05
申请号：US699028
申请日：1991-05-13
申请人： Linda R. Chamberlain , Carma J. Gibler , Richard A. Kemp , Stanley E. Wilson , Thomas F. Brownscombe
发明人： Linda R. Chamberlain , Carma J. Gibler , Richard A. Kemp , Stanley E. Wilson , Thomas F. Brownscombe
摘要： This invention provides a catalyst and a process for the hydrogenation of conjugated diolefin polymers which first involves the polymerization or copolymerization of such monomers with an organo alkali metal polymerization initiator in a suitable solvent thereby creating a living polymer. The living polymer can be terminated by the addition of hydrogen. Finally, selective hydrogenation of the unsaturable double bonds in the conjugated diolefin units of the terminated polymer is carried out in the presence of an initiator and at least one rare earth compound of the formula*Cp.sub. MRwhere *Cp is pentamethylcyclopentadiene, M is a rare earth element and R is alkyl, aryl, aralkyl or hydrogen.
摘要翻译： 本发明提供了一种用于共轭二烯烃聚合物的氢化的催化剂和方法，其首先涉及这种单体与有机碱金属聚合引发剂在合适的溶剂中的聚合或共聚，从而产生活性聚合物。 活性聚合物可以通过加入氢来终止。 最后，封端聚合物的共轭二烯烃单元中的不饱和双键的选择性氢化在引发剂和至少一种式* CpMR的稀土化合物的存在下进行，其中* Cp是五甲基环戊二烯，M是稀土 元素，R是烷基，芳基，芳烷基或氢。
-
公开(公告)号：US5143990A
公开(公告)日：1992-09-01
申请号：US522693
申请日：1990-05-14
摘要： This is an improvement upon a process which comprises anionically polymerizing monomers with an anionic polymerization initiator in a suitable solvent thereby creating a living polymer. The improvement comprises terminating the polymerization by the addition of hydrogen which reacts with the living polymer to terminate the polymer chain.
摘要翻译： 这是对包括阴离子聚合单体与阴离子聚合引发剂在合适溶剂中的方法的改进，从而产生活性聚合物。 改进包括通过加入与活性聚合物反应以终止聚合物链的氢终止聚合。
-
公开(公告)号：US5605991A
公开(公告)日：1997-02-25
申请号：US620112
申请日：1996-03-21
摘要： A multifunctional initiator is prepared by contacting an organo-alkali metal compound with a silane represented by the formula: ##STR1## wherein the R' are generally lower alkyl groups such as methyl and the R" is generally an .paren open-st.CH.sub.2 .paren close-st..sub.n group with n=2. Superior results are obtained presumably because of the separation of the vinyl groups and the greater solubility of the compound because of the R' groups. The resulting catalyst initiates polymerization of monomers such as conjugated dienes and monovinyl substituted aromatic compounds to give relatively monodispersed polymers with little or no crosslinking.
摘要翻译： 通过使有机碱金属化合物与由下式表示的硅烷接触来制备多官能引发剂：其中R'通常为低级烷基，例如甲基，R“通常为+545CH 2 + 546 n 组n = 2。 由于R'基团，由于乙烯基的分离和化合物的溶解度增加，所以可以获得优异的结果。 所得催化剂引发单体如共轭二烯和单乙烯基取代的芳族化合物的聚合，以得到相对单分散的聚合物，具有很少或没有交联。
-
公开(公告)号：US5194530A
公开(公告)日：1993-03-16
申请号：US929747
申请日：1992-08-17
摘要： This is an improvement upon a process which comprises anionically polymerizing monomers with an anionic polymerization initiator in a suitable solvent thereby creating a living polymer. The improvement comprises terminating the polymerization by the addition of a terminating agent selected from the group consisting of hydrocarbons containing a C-H group where the carbon is connected directly to a triply-bound carbon, hydrocarbons containing a C-H group where the carbon is connected directly to two doubly-bound carbons and hydrocarbons containing a C-H group where the carbon is connected directly to at least 2 aromatic rings, whereing none of said hydrocarbons contain additional aliphatic unsaturation.
摘要翻译： 这是对包括阴离子聚合单体与阴离子聚合引发剂在合适溶剂中的方法的改进，从而产生活性聚合物。 改进包括通过加入终止剂终止聚合，所述终止剂选自包含CH基团的碳，其中碳直接连接至三键结合的碳，含有CH基团的碳直接连接到两个碳上 双键结合的碳和含有CH基团的烃，其中碳直接连接到至少2个芳环上，其中所述烃不含有另外的脂族不饱和键。
-
公开(公告)号：US5162446A
公开(公告)日：1992-11-10
申请号：US785114
申请日：1991-10-30
摘要： This is a process for the depolymerization of conjugated diene polymers which comprises contacting the polymers with hydrogen in the presence of at least one bis(cyclopentadienyl)zirconium compound.
-
公开(公告)号：US5280059A
公开(公告)日：1994-01-18
申请号：US49690
申请日：1993-04-16
摘要： The present invention is an improvement upon a process for hydrogenating a diene polymer by contacting the polymer in the presence of hydrogen with a titanium hydrogenation catalyst. The improvement comprises preventing discoloration of the hydrogenated polymer by treating it with water, a peroxide or alcohol in the absence of oxygen and adding a non-phenolic antioxidant to the polymer.
摘要翻译： 本发明是通过在氢气存在下使聚合物与钛氢化催化剂接触来使二烯聚合物氢化的方法的改进。 该改进包括通过在没有氧气的情况下用水，过氧化物或醇处理氢化聚合物来防止变色，并向聚合物中加入非酚类抗氧化剂。
-
公开(公告)号：US5242961A
公开(公告)日：1993-09-07
申请号：US889349
申请日：1992-05-28
摘要： The present invention is an improvement upon a process for hydrogenating a diene polymer by contacting the polymer in the presence of hydrogen with a titanium hydrogenation catalyst. The improvement comprises preventing discoloration of the hydrogenated polymer by treating it with water, a peroxide or alcohol in the absence of oxygen and adding a non-phenolic antioxidant to the polymer.
-
公开(公告)号：US5132372A
公开(公告)日：1992-07-21
申请号：US756392
申请日：1991-09-09
摘要： This is an improved process for the hydrogenation of conjugated diolefin polymers which comprises polymerizing or copolymerizing at least one conjugated diolefin with an organo alkali metal polymerization initiator in a suitable solvent thereby creating a living polymer, terminating the polymerization by the addition of hydrogen and effecting selective hydrogenation of the unsaturated double bonds in the conjugated diolefin units of the terminated polymer by contacting the polymer, in the absence of hydrocarbon lithium and alkoxy lithium compounds, with hydrogen in the presence of at least one bis(cyclopentadienyl)titanium compound. The improvement is the use of methyl benzoate as a promoter in the hydrogenation step.
摘要翻译： 这是一种用于共轭二烯烃聚合物的氢化的改进方法，该方法包括在合适的溶剂中将至少一种共轭二烯烃与有机碱金属聚合引发剂聚合或共聚，由此产生活性聚合物，通过加入氢终止聚合并实现选择性 在不存在烃锂和烷氧基锂化合物的情况下，在至少一种双（环戊二烯基）钛化合物的存在下，使聚合物与聚合物接触，从而氢化端基聚合物的共轭二烯烃单元中的不饱和双键。 改进是在氢化步骤中使用苯甲酸甲酯作为促进剂。
-
公开(公告)号：US5141997A
公开(公告)日：1992-08-25
申请号：US568113
申请日：1990-08-15
IPC分类号： C08F8/04 , C08C19/02 , C08F36/00 , C08F36/04 , C08F297/04
CPC分类号： C08C19/02
摘要： This invention provides a catalyst and a process for the hydrogenation of conjugated diolefin polymers which first involves the polymerization or copolymerization of such monomers with an organo alkali metal polymerization initiator in a suitable solvent thereby creating a living polymer. The living polymer is preferably terminated by the addition of hydrogen. Finally, selective hydrogenation of the unsaturated double bonds in the conjugated diolefin units of the terminated polymer is carried out in the presence of at least one bis(cyclopentadienyl)titanium (+3) compound of the formula:(C.sub.5 R".sub.5).sub.2 --Ti--Rwhere R is selected from the group consisting of alkyl, aralkyl, allyl, aryl, alkoxy, halogen, silyl or amine and R", which may be the same or different, is selected from the group consisting of hydrogen, alkyl, aralkyl or aryl.
-
-
-
-
-
-
-
-
-
搜索结果
16 条记录 (耗时 0.012 秒)
