Patents Assigned to Research Institute of Beijing Yanshan
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Patent number: 6787661Abstract: The present invention relates to a tin-containing organolithium compound which can be used as anionic polymerization initiators, represented by the following formula (1): R4−xSn(Ya—Zm—Yb—Li)x (1) Wherein R, Z and Y are defined as in the specification; x represents a value of 1 or 2; m represents a value of 0 or 1; a represents a value of 0 to 6, b represents a value of 0 to 6, a+b is from 0 to 6, provided that m=1 when x=1. The tin-containing organolithium compounds according to the present invention can be used as initiators to initiate the polymerization of conjugated dienes and/or monovinyl aromatic hydrocarbons, thereby synthesizing various linear, star or telechelic polymers. The present invention also relates to a method for preparing the tin-containing organolithium compounds according to the present invention.Type: GrantFiled: June 11, 2002Date of Patent: September 7, 2004Assignees: China Petroleum and Chemical Corporation, Research Institute of Beijing YanshanInventors: Chuanqing Li, Aimin Liang, Wei Li, Liyun Zhao, Song Lu, Lin Xu, Qing Liu
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Patent number: 6777499Abstract: The present invention relates to multiblock interpolymers having the following symmetric structures and processes for their preparation: Y-X-Y, wherein Y represents a block of a random copolymer of conjugated diene and monovinyl aromatic monomer; and X represents a block of butadiene homopolymer, a block of isoprene homopolymer, or a block of butadiene/isoprene copolymer, and processes for the preparation thereof. The present multiblock interpolymers have in the same molecule both a rubber block of random copolymer of conjugated diene and monovinyl aromatic monomer and a rubber block selected from blocks of butadiene homopolymer, isoprene homopolymer and butadiene/isoprene copolymers, and hence possess excellent properties of the both two kinds of rubbers, and can be used widely as integrated rubber materials with excellent property balance, the present processes can simply prepare the above integrated rubber material in situ in a single reactor.Type: GrantFiled: May 20, 2002Date of Patent: August 17, 2004Assignees: China Petroleum & Chemical Corporation, Research Institute of Beijing Yanshan Petro Chemical Co. Ltd.Inventors: Yang Li, Dingyi Hong, Mingchu Gu, Jinzong Yang, Yurong Wang, Hongde Xu, Xingjun Lu, Li Yang, Jian Ding, Zhanxia Lv, Yongjun Lu, Yuchun Song
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Publication number: 20030181747Abstract: The present invention relates to a tin-containing organolithium compound which can be used as anionic polymerization initiators, represented by the following formula (1):Type: ApplicationFiled: June 11, 2002Publication date: September 25, 2003Applicant: China Petroleum and Chemical Corp and Research Institute of Beijing Yanshan Petrochemical Co LtdInventors: Chuanqing Li, Aimin Liang, Wei Li, Liyun Zhao, Song Lu, Lin Xu, Qing Liu
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Patent number: 6462137Abstract: The present invention relates to star-block interpolymers having the following structure (X-Y)n-C, wherein X represents a random copolymer block derived from conjugated diene and monovinyl aromatic monomer; Y represents a polyconjugated diene block; C represents a residue derived from a multifunctional lithium based initiator; and n represents the functionality of the initiator and has a value of not less than 3; and preparation of the same. The star-block interpolymers according to the present invention have in the same molecule both a random copolymer block derived from conjugated diene and monovinyl aromatic monomer and a rubber block selected from the group consisting of a homopolymer block derived from conjugated diene, a tapered copolymer block derived from conjugated dienes, a random copolymer block derived from conjugated dienes and combinations thereof, and hence possess excellent properties of the both kinds of rubbers, and can be used widely as elastomeric materials.Type: GrantFiled: October 18, 2001Date of Patent: October 8, 2002Assignees: China Petroleum and Chemical Corporation, Research Institute of Beijing Yanshan Petrochemical Co., Ltd.Inventors: Yang Li, Hongde Xu, Yurong Wang, Dingyi Hong, Mingchu Gu, Mei Wang, Zhanxia Lü, Aili Xu
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Patent number: 6372853Abstract: The present invention relates to butadiene/isoprene/monovinyl aromatic monomer heptablock copolymers having the following symmetric structure: Z-XZ-X-Y-X-XZ-Z wherein Z represents a polymer block of monovinyl aromatic monomer, X and Y, being different from each other, represent polymer blocks of butadiene or isoprene, XZ represents a tapered copolymer block of monovinyl aromatic monomer and butadiene or isoprene, and wherein the content of the recurring units derived from monovinyl aromatic monomer is 10 to 50 percent by weight, the content of the recurring units derived from butadiene is 10-75 percent by weight and the content of the recurring units derived from isoprene is 10-75 percent by weight, all based on the weight of the block copolymer, and methods for the preparation thereof.Type: GrantFiled: July 27, 2000Date of Patent: April 16, 2002Assignees: China Petrochemical Corporation, Research Institute of Beijing Yanshan Petrochemical Co., Ltd.Inventors: Yang Li, Dingyi Hong, Mingchu Gu, Jinzong Yang, Yurong Wang, Hongde Xu, Xingjun Lu, Zhanxia Lv, Yongjun Lu, Yuchun Song
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Patent number: 6140433Abstract: This invention relates to a thermoplastic elastomeric block copolymer and process for the preparation thereof. According to this invention, the block copolymer obtained through block copolymerization process at higher temperature and adding butyllithium in twice during copolymerization are mixed block copolymer of A.sub.1 -B-A.sub.2 /B-A.sub.2 and B-A.sub.2 /B-A.sub.2 (where A represents monovinyl aromatic monomer; B represents conjugated diene monomer) having different blocks, higher elongation and appropriate melt index. The process of this invention is simple and efficient. The thermoplastic elastomeric block copolymer of this invention are particularly useful for various applications of typical styrene butadiene block copolymer, especially plastic modifier.Type: GrantFiled: June 16, 1998Date of Patent: October 31, 2000Assignees: China Petrochemical Corporation, Research Institute of Beijing Yanshan Petrochemical CorporationInventors: Nairan Zhang, Wenjuan Sun
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Patent number: 5063195Abstract: A process for preparing silver-containing catalysts and their carriers for the production of ethylene oxide via ethylene oxidation and also to the applications of said catalysts in producing ethylene oxide.Commercial trihydrated .alpha.-alumina, boehmite, carbonaceous materials, a fluxing agent, fluoride and a binder are mixed with water, kneaded and extruded to form strips which are cut and shaped. The shaped bodies are dried, calcined and converted to a .alpha.-alumina bodies i.e., carriers. This process is characterized by using trihydrated .alpha.-alumina, boehmite alumina and carbonaceous materials which have a good matching of particle sizes and proportions in preparing alumina carriers with the following pore structure:______________________________________ specific surface area 0.2-2 m.sup.2 /g pore volume >0.5 ml/g pore radius >30.mu., 25-10% of total volume <30.mu., 75-90% of total volume.Type: GrantFiled: February 1, 1989Date of Patent: November 5, 1991Assignees: China Petrochemical Corporation, Beijing China Research Institute of Beijing Yanshan Petrochemical CorporationInventors: JiQuan Jin, Lian Di Shang, Guo Quan Jin, Yong Xu, Guo Chun Luo