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    • 3. 发明申请
    • Natural rubber-rich composition and tire with tread thereof
    • 天然橡胶丰富的组合物和具有胎面的轮胎
    • US20050272852A1
    • 2005-12-08
    • US10859524
    • 2004-06-02
    • Paul SandstromAdel HalasaWen-Liang HsuJohn VertheChad Jasiunas
    • Paul SandstromAdel HalasaWen-Liang HsuJohn VertheChad Jasiunas
    • B60C1/00C08F4/56C08K3/04C08K3/36C08L7/00C08L9/06C08L21/00
    • C08L7/00B60C1/0016C08K3/04C08K3/36C08L9/06C08L21/00C08L2666/02C08L2666/08
    • This invention relates to a natural rubber-rich rubber composition and tire with tread thereof. A partial replacement of the natural rubber in the natural rubber-rich tire tread is accomplished by an inclusion of a specialized trans 1,4-styrene/butadiene copolymer rubber characterized by having a combination of bound styrene content and microstructure limitations. The tire tread rubber composition is comprised of a blend of the specialized trans 1,4-styrene/butadiene rubber and cis 1,4-polyisoprene natural rubber optionally together with at least one additional diene-based elastomer in which the natural rubber remains a major portion of the elastomers in the tread rubber composition. A significant aspect of the invention is a partial replacement of natural cis 1,4-polyisoprene rubber in the tread rubber composition. The specialized trans 1,4-styrene/butadiene rubber has a bound styrene content in a range of from about 15 to about 35 percent and a microstructure of its polybutadiene portion composed of from about 50 to about 80 percent trans 1,4-isomeric units, from about 10 to about 20 percent cis 1,4-isomeric units and from about 2 to about 10 percent vinyl 1,2-isomeric units; preferably a Mooney (ML1+4) at 100° C. viscosity value in a range of from about 50 to about 100, alternately from about 50 to about 85, and preferably a glass transition temperature (Tg) in a range of from about −60° C. to about −90° C.
    • 本发明涉及一种富含天然橡胶的橡胶组合物和具有胎面的轮胎。 天然橡胶丰富的轮胎胎面中天然橡胶的部分替代是通过包含特征在于具有结合苯乙烯含量和微结构限制的组合的专用反式1,4-苯乙烯/丁二烯共聚物橡胶来实现的。 轮胎胎面橡胶组合物由专门的反式1,4-苯乙烯/丁二烯橡胶和顺式1,4-聚异戊二烯天然橡胶的混合物组成,任选与至少一种另外的二烯基弹性体共混,其中天然橡胶保持主要 橡胶组合物中的部分弹性体。 本发明的一个重要方面是在胎面橡胶组合物中部分替代天然顺式1,4-聚异戊二烯橡胶。 专用的反式1,4-苯乙烯/丁二烯橡胶具有约15至约35%范围内的结合苯乙烯含量,其聚丁二烯部分的显微组织由约50至约80%的反式1,4-异构体单元 ,约10至约20%的顺式1,4-异构体单元和约2至约10%的乙烯基1,2-异构体单元; 优选为100℃时的门尼(ML1 + 4),粘度值为约50至约100,交替为约50至约85,优选玻璃化转变温度(Tg)为约 - 60℃至约-90℃
    • 4. 发明授权
    • Process and catalyst system for synthesizing random trans SBR with low
vinyl microstructure
    • 用于合成具有低乙烯基显微组织的随机反式SBR的工艺和催化剂体系
    • US6103842A
    • 2000-08-15
    • US72492
    • 1998-05-04
    • Adel Farhan HalasaWen-Liang HsuLaurie Elizabeth Austin
    • Adel Farhan HalasaWen-Liang HsuLaurie Elizabeth Austin
    • B60C1/00C08F4/54C08F4/56C08F236/10C08F4/50C08F36/06
    • C08F236/10C08F4/565
    • The process and catalyst system of this invention can be utilized to synthesize a highly random styrene-butadiene rubber having a high trans content by solution polymerization. The styrene-butadiene rubber made by the process of this invention can be utilized in tire tread rubbers that exhibit improved wear characteristics. This invention more specifically reveals a catalyst system for use in exothermal polymerizations which consists essentially of (a) an organolithium compound, (b) a barium alkoxide and (c) a lithium alkoxide. The subject invention further discloses a process for synthesizing a random styrene-butadiene rubber having a low vinyl content by a process which comprises copolymerizing styrene and 1,3-butadiene under isothermal conditions in an organic solvent in the presence of a catalyst system which consists essentially of (a) an organolithium compound, (b) a barium alkoxide and (c) a lithium alkoxide.
    • 本发明的方法和催化剂体系可用于通过溶液聚合合成具有高反式含量的高度无规的苯乙烯 - 丁二烯橡胶。 通过本发明方法制备的苯乙烯 - 丁二烯橡胶可用于表现出改善的磨损特性的轮胎胎面橡胶。 本发明更具体地揭示了一种用于放热聚合的催化剂体系,其基本上由(a)有机锂化合物,(b)烷氧基钡和(c)醇盐锂组成。 本发明还公开了一种合成具有低乙烯基含量的无规苯乙烯 - 丁二烯橡胶的方法,该方法包括在等温条件下在有机溶剂中在催化剂体系存在下共聚苯乙烯和1,3-丁二烯的方法,所述催化剂体系基本上组成 (a)有机锂化合物,(b)钡醇盐和(c)醇锂。
    • 6. 发明授权
    • Solution diene elastomers by alkyl lithium catalysis
    • 溶液二烯弹性体通过烷基锂催化
    • US3944528A
    • 1976-03-16
    • US549416
    • 1975-02-12
    • Frederick C. Loveless
    • Frederick C. Loveless
    • C08F236/10C08F4/56
    • C08F236/10
    • This invention relates to a solution process for preparing copolymers of a conjugated diene hydrocarbon and a vinyl-substituted aromatic hydrocarbon using a potassium-modified organolithium catalyst. The Li/K molar ratio is varied depending upon whether a random or pseudorandom copolymer is desired and depending on whether an aliphatic hydrocarbon or aromatic hydrocarbon solvent or a mixture of such solvents is used. The invention includes the pseudorandom copolymers formed by the process of the invention, such copolymers being characterized, in part, by having blocks with two to four units of the vinyl-substituted aromatic hydrocarbon interspersed throughout the copolymer chain.
    • 本发明涉及使用改性有机锂催化剂制备共轭二烯烃和乙烯基取代芳烃的共聚物的溶液方法。 Li / K摩尔比取决于是否需要随机或伪随机共聚物并且取决于是使用脂族烃还是芳族烃溶剂或这些溶剂的混合物而变化。 本发明包括通过本发明的方法形成的伪随机共聚物,这种共聚物的特征在于部分地具有散布在整个共聚物链中的具有2-4个单元的乙烯基取代的芳烃的嵌段。