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    • 14. 发明授权
    • Amine-functionalized liquid polyisoprene
    • 胺官能化液体聚异戊二烯
    • US07608658B2
    • 2009-10-27
    • US12267086
    • 2008-11-07
    • Michael Joseph RachitaVanessa Marika GuscoffLawson Gibson Wideman
    • Michael Joseph RachitaVanessa Marika GuscoffLawson Gibson Wideman
    • C08K3/36C08F36/02C08F26/06
    • B29C67/246B29B7/7495C08C19/25C08C19/30C08K5/5419C08L19/006
    • This invention discloses a process for manufacturing an elastomeric article by liquid injection molding, said process comprising the steps of: (I) heating a curable composition comprised of (1) a liquid polymer comprised of repeat units that are derived from a conjugated diolefin monomer, wherein said liquid polymer has a weight average molecular weight which is within the range of 5,000 to 100,000, and wherein the liquid polymer is functionalized with an amine moiety, (2) a carbonyl inhibited platinum catalyst, and (3) a tetrakis(dialkyl siloxy) silane crosslinking agent, to a temperature which is within the range of 30° C. to 100° C.; (II) injecting the heated curable composition into a mold at a temperature which is within the range of 100° C. to 210° C. to produce the elastomeric article; and (III) removing the elastomeric article from the mold.
    • 本发明公开了一种通过液体注射成型制造弹性制品的方法,所述方法包括以下步骤:(I)加热可固化组合物,其包含(1)由衍生自共轭二烯烃单体的重复单元组成的液体聚合物, 其中所述液体聚合物的重均分子量在5,000至100,000的范围内,并且其中所述液体聚合物用胺部分官能化,(2)羰基抑制铂催化剂,和(3)四(二烷基甲硅烷氧基 )硅烷交联剂,温度在30℃至100℃的范围内。 (II)将加热的可固化组合物以100℃至210℃的温度注入模具中以制备弹性体制品; 和(III)从模具中去除弹性制品。
    • 15. 发明授权
    • Synthesis of 1,4-polybutadiene
    • US07081504B2
    • 2006-07-25
    • US10929977
    • 2004-08-30
    • Michael Joseph RachitaScott Edwards Johnson
    • Michael Joseph RachitaScott Edwards Johnson
    • C08F2/06C08F136/06
    • C08F36/06C08F136/06Y10S526/907C08F4/7098
    • This invention is based upon the unexpected discovery that alkylated diphenylamines can be used in conjunction with nickel based catalyst systems which contain (a) an organonickel compound, (b) an organoaluminum compound, and (c) a fluorine containing compound to produce cis-1,4-polybutadiene having reduced molecular weight and an increased level of branching. This results in the cis-1,4-polybutadiene exhibiting good processability without sacrificing cold flow characteristics. Additionally, the alkylated diphenylamine which remains in the rubber acts in a manner which provides it with antioxidant protection. In other words, the use of alkylated diphenylamines accomplishes the three major objectives that are realized by employing para-styrenated diphenylamines (reduced molecular weight, regulated polymer macrostructure through branching and antidegradant protection). However, the utilization of alkylated diphenylamines, unlike para-styrenated diphenylamines, offers the additional advantage of being soluble in aliphatic solvents. By virtue of this increased level of solubility in aliphatic solvents, such as hexane, alkylated diphenylamines can be employed at greatly reduced levels of aromatic solvents. Likewise, when mixed catalyst streams containing alkylated diphenyl amines are combined precipitation is minimized compared to para-styrenated diphenylamine significantly improving issues related to fouling. The subject invention more specifically discloses a process for producing cis-1,4-polybutadiene having a reduced molecular weight and improved processability which comprises polymerizing 1,3-butadiene in the presence of (a) an organonickel compound, (b) an organoaluminum compound, (c) a fluorine containing compound, and (d) an alkylated diphenylamine; wherein the alkylated diphenylamine has alkyl groups that contain from 2 to 18 carbon atoms, and wherein the organoaluminum compound and the fluorine containing compound are brought together in the presence of the alkylated diphenylamine.
    • 17. 发明申请
    • PNEUMATIC TIRE
    • 气动轮胎
    • US20110124771A1
    • 2011-05-26
    • US12622800
    • 2009-11-20
    • Paul Harry SandstromBrad Stephen GulasDavid Mark FrantzSteven Wayne CroninTang Hong WongMichael Joseph Rachita
    • Paul Harry SandstromBrad Stephen GulasDavid Mark FrantzSteven Wayne CroninTang Hong WongMichael Joseph Rachita
    • C08J5/14
    • C08L9/00B29B7/7495B60C1/00C08C19/44C08K3/36C08L9/06C08L15/00Y02T10/862C08L2666/08
    • The present invention is directed to a pneumatic tire having a component comprising a vulcanizable rubber composition comprising, based on 100 parts by weight of elastomer (phr),(A) from about 60 to about 90 phr of a polymer comprising (1) a terminating group provided from a terminating compound XnSi(OR)mR′4-m-n wherein X is a chlorine atom, a bromine atom or an iodine atom, R is an alkyl group with from about 1 carbon to about 7 carbons, R′ is a alkyl group with from about 1 carbon to about 20 carbons, an aryl group, a vinyl group or a halogenated alkyl group, m is an integer from about 1 to about 4, n is an integer from about 0 to about 2, and a sum of n and m is from 1 to 4; (2) repeat units comprising: (a) a repeat unit provided from a conjugated diolefin monomer, and (b) a repeat unit provided from an amine monomer; (B) from about 40 to about 10 phr of polybutadiene having a microstructure comprised of about 96 to about 99 percent cis 1,4-isomeric units, about 0.1 to about 1 percent trans 1,4-isomeric units and from about 1 to about 3 percent vinyl 1,2-isomeric units; a number average molecular weight (Mn) in a range of from about 75,000 to about 150,000 and a heterogeneity index (Mw/Mn) in a range of from about 3/1 to about 5/1; and(C) from about 50 to about 150 phr of silica.
    • 本发明涉及具有包含可硫化橡胶组合物的组分的充气轮胎,该组合物包含基于100重量份的弹性体(phr),(A)约60至约90phr的聚合物,其包含(1)终止 由末端化合物XnSi(OR)mR'4-mn提供的基团,其中X是氯原子,溴原子或碘原子,R是具有约1碳至约7个碳的烷基,R'是烷基 具有约1个碳至约20个碳的烷基,芳基,乙烯基或卤代烷基,m为约1至约4的整数,n为约0至约2的整数,以及 n和m为1至4; (2)重复单元,包括:(a)由共轭二烯单体提供的重复单元,和(b)由胺单体提供的重复单元; (B)约40至约10phr的具有约96至约99%的顺式1,4-异构体单元,约0.1至约1%的反式1,4-异构体单元和约1至约1%的微结构的聚丁二烯 3%乙烯基1,2-异构体单元; 在约75,000至约150,000范围内的数均分子量(Mn)和约3/1至约5/1范围内的异质指数(Mw / Mn); 和(C)约50至约150phr的二氧化硅。
    • 20. 发明授权
    • Synthesis of polyisoprene with neodymium catalyst
    • 用钕催化剂合成聚异戊二烯
    • US06780948B2
    • 2004-08-24
    • US10368660
    • 2003-02-18
    • Michael Joseph RachitaZhengfang XuTang Wong
    • Michael Joseph RachitaZhengfang XuTang Wong
    • C08F23608
    • C08F136/08C08F4/545
    • The neodymium catalyst system prepared by the technique of this invention can be used in the polymerization of isoprene monomer into polyisoprene rubber that is clear (transparent) and of high purity. This invention more specifically discloses a process for the synthesis of polyisoprene rubber which comprises polymerizing isoprene monomer in the presence of a neodymium catalyst system, wherein the neodymium catalyst system is prepared by (1) reacting a neodymium carboxylate with an organoaluminum compound in the presence of isoprene for a period of about 10 minutes to about 30 minutes to produce neodymium-aluminum catalyst component, and (2) subsequently reacting the neodymium-aluminum catalyst component with a dialkyl aluminum chloride for a period of at least 30 minutes to produce the neodymium catalyst system.
    • 通过本发明技术制备的钕催化剂体系可用于将异戊二烯单体聚合成透明(透明)且高纯度的聚异戊二烯橡胶。 本发明更具体地公开了一种用于合成聚异戊二烯橡胶的方法,其包括在钕催化剂体系的存在下聚合异戊二烯单体,其中所述钕催化剂体系通过以下步骤制备:(1)使羧酸钕与有机铝化合物在 异戊二烯约10分钟至约30分钟的时间以产生钕 - 铝催化剂组分,和(2)随后使钕 - 铝催化剂组分与二烷基氯化铝反应至少30分钟的时间以产生钕催化剂 系统。