| Patent Number |
Title Of Patent |
Date Issued |
| 4672097 |
Process and system for preparing random copolymers having low vinyl contents |
June 9, 1987 |
| A process is disclosed herein for preparing randomized copolymers of conjugated dienes and vinyl aromatic hydrocarbons having low vinyl contents by utilizing an anionic initiator system comprising alkali metal trihydrocarbyl magnesiates optionally together with an organolithium compo |
| 4647635 |
Initiator systems for polymerization of 1,3-dienes or copolymers containing 1,3-dienes |
March 3, 1987 |
| A process and a catalyst system is disclosed herein for preparation of medium to high vinyl (co)polymers containing a 1,2-microstructure of between 30 and about 90 percent. The catalyst system which is employed in the production of the (co)polymer is an oligomeric oxolanyl alkane mod |
| 4591624 |
Catalyst system and process for polymerizing conjugated dienes |
May 27, 1986 |
| Conjugated dienes, in particular 1,3-conjugated dienes, can be polymerized or copolymerized using the catalyst system of this invention to polymers wherein the amount of 1,2-structure contained in the polymer is increased, and polymers can be prepared containing varying amounts of 1,2-st |
| 4562172 |
Method of preparing high cis-1,4 diene polymers having good green strength and tack |
December 31, 1985 |
| Diene polymers having a high content of cis-1,4 addition are prepared by polymerizing a 1,3-diene monomer in a hydrocarbon solvent in the presence of a catalyst composition comprising (a) a carboxylated metal oxy borate compound in which the metal is nickel or cobalt, (b) an organometall |
| 4537939 |
Process for production of polymers having increased 1,2-microstructure |
August 27, 1985 |
| A process and catalyst system is disclosed herein for the preparation of (co)polymers having a 1,2-microstructure of between about 20 and about 65 percent. These (co)polymers are prepared in a hydrocarbon or non-polar solvent from a monomer system which contains at least one 1,3-diene |
| 4530984 |
Process for production of polymers having increased 1,2-microstructure |
July 23, 1985 |
| A process and catalyst system is disclosed herein for the preparation of (co)polymers having a 1,2-microstructure ranging between about 20 and about 65 percent. These (co)polymers are prepared in a hydrocarbon or non-polar solvent from a monomer system which contains at least one 1,3 |
| 4528331 |
Sealant compositions having, as an essential component, hydrogenated polybutadiene as network po |
July 9, 1985 |
| A conventional sealant composition having as its essential rubber components (1) at least one high molecular weight, hydrogenated polybutadiene polymer, and (2) at least one low molecular weight liquid elastomer, i.e., polybutene, as tackifying polymer, compatible to a high degree wi |
| 4522988 |
Method of preparing high cis-1,4 diene polymers having good green strength and tack |
June 11, 1985 |
| Diene polymers having a high content of cis-1,4 addition are prepared by polymerizing a 1,3-diene monomer in a hydrocarbon solvent in the presence of a catalyst composition comprising (a) a carboxylated metal oxy borate compound in which the metal is nickel or cobalt, (b) an organometall |
| 4520123 |
Catalyst system and process for polymerizing conjugated dienes |
May 28, 1985 |
| Conjugated dienes, in particular 1,3-conjugated dienes, can be polymerized or copolymerized using the catalyst system of this invention to polymers wherein the amount of 1,2-structure contained in the polymer is increased, and polymers can be prepared containing varying amounts of 1,2-st |
| 4476240 |
Catalyst system containing an anionic initiator based on lithium and phosphine oxide modifier |
October 9, 1984 |
| A process and catalyst system is disclosed herein for the preparation of (co)polymers having a 1,2-microstructure of between about 20 and about 65 percent. These (co)polymers are prepared in a hydrocarbon or non-polar solvent from a monomer system which contains at least one 1,3-diene |
| 4473661 |
Polymerization catalyst system containing organolithium, dialkyl magnesium and/or trialkyl alumi |
September 25, 1984 |
| A process and catalyst system is disclosed herein for the preparation of (co)polymers having a 1,2-microstructure ranging between about 20 and about 65 percent. These (co)polymers are prepared in a hydrocarbon or non-polar solvent from a monomer system which contains at least one 1,3 |
| 4445562 |
Sealant compositions having, as an essential component, hydrogenated polybutadiene as network po |
May 1, 1984 |
| A conventional sealant composition having as its essential rubber components (1) at least one high molecular weight, hydrogenated polybutadiene polymer, and (2) at least one low molecular weight liquid elastomer, i.e., polybutene, as tackifying polymer, compatible to a high degree wi |
| 4429091 |
Oligomeric oxolanyl alkanes as modifiers for polymerization of dienes using lithium-based initia |
January 31, 1984 |
| A process and catalyst system is disclosed herein for the preparation of (co)polymers having a 1,2-microstructure of between 20 and 95 percent. These (co)polymers are prepared in a hydrocarbon or other non-polar solvent from a monomer system which contains at least one 1,3-diene mono |
| 4429090 |
Catalyst containing oligomeric oxolanyl alkane modifiers and process for the production of polym |
January 31, 1984 |
| A process and catalyst system is disclosed herein for the preparation of (co)polymers having a 1,2-microstructure of between 20 and 95 percent. These (co)polymers are prepared in a hydrocarbon or other non-polar solvent from a monomer system which contains at least one 1,3-diene mono |
| 4401800 |
Lithium alkoxide diamines as modifiers for polymerization of dienes using lithium-based initiato |
August 30, 1983 |
| A process and catalyst system is disclosed herein for the preparation of (co)polymers having a 1,2-microstructure of between 20 and 90 percent. These (co)polymers are prepared in a hydrocarbon or non-polar solvent from a monomer system which contains at least one 1,3-diene monomer. The |
| 4291139 |
Process for preparation of block copolymers |
September 22, 1981 |
| The process described herein involves the preparation of block copolymers of the S-B-S type wherein S represents a block of polystyrene and B represents a block of polybutadiene. In order to have the initial polystyrene block soluble in the polymerization medium, cyclohexane and arom |
| 4252914 |
Thermoplastic elastomer blends of hydrogenated polybutadiene block copolymers with alpha-olefin |
February 24, 1981 |
| Thermoplastic elastomer blends of alpha-olefin polymers and copolymers, such as polypropylene, having a melting point of at least 90.degree. C. with hydrogenated diblock copolymers of 1,4-polybutadiene and 1,2-polybutadiene have good physical properties such as low brittle point, goo |
| 4247418 |
Polymerization catalyst and process for polymerizing dienes therewith |
January 27, 1981 |
| The catalyst system disclosed herein comprises a combination or a chelate of a hydrocarbyl lithium compound with a bicyclic amine compound bridged together through nitrogen in each cyclic ring by means of 1-4, preferably 2-4 carbon atoms and each cyclic ring having at least one nitrogen |
| 4237245 |
Hydrogenated block copolymers of butadiene containing a block of 1,4 and a block of 1,2-microstr |
December 2, 1980 |
| The composition described herein is a hydrogenated polymer derived from a butadiene diblock copolymer having 85-100%, preferably 95-100% 1,2-structure in one block and the other block comprising essentially 1,4-butadiene. The 1,2-block comprises at least 10%, preferably at least 25%, |
| 4226952 |
Thermoplastic elastomer blends of alpha-olefin polymers and hydrogenated medium and high vinyl b |
October 7, 1980 |
| Thermoplastic elastomer blends of alpha-olefin polymers and copolymers, such as polypropylene, polyethylene, etc., having a melting point of at least 90.degree. C. with hydrogenated butadiene medium and high vinyl polymers have good physical properties such as low brittle point, good |
| 4225690 |
Process and catalyst for producing high trans 1,4-polybutadiene |
September 30, 1980 |
| The process disclosed herein comprises the use of a catalyst system comprising a complex of R.sub.2 Mg.(ROK).sub.2 in the hydrocarbon solution polymerization of 1,3-butadiene. Preferably the solvent is hexane, but cyclohexane or other alkane or cycloalkane may be used. The ratio of ROK |
| 4225567 |
Solution polymerization of chlorophosphazene with sulfur modifier |
September 30, 1980 |
| Solution polymerization of cyclic dichlorophosphazenes represented by the general formula (NPCl.sub.2).sub.n in which "n" is less than 15 to essentially linear polydichlorophosphazenes in which the degree of polymerization is within the range of 20 to 50,000 is improved by the use of |
| 4219627 |
Process for the preparation of block copolymers |
August 26, 1980 |
| The process described herein involves the preparation of block copolymers of the S-B-S type wherein S represents a block of polystyrene and B represents a block of polybutadiene. In order to have the initial polystyrene block soluble in the polymerization medium, cyclohexane and arom |
| 4198496 |
Process for polymerizing butadiene |
April 15, 1980 |
| 1,3-Butadiene is polymerized in hexane solution in the presence of a catalyst composition comprising:(a) A hexane-soluble cobalt component;(b) A reducing agent comprising RAlX.sub.2 wherein R is a hydrocarbyl radical of 1-8 carbon atoms, and X is halogen; and(c) MgCl.sub.2, MgBr.sub.2, MnCl. |
| 4174431 |
Process for polymerizing conjugated dienes |
November 13, 1979 |
| The process and catalyst system disclosed herein comprises the polymerization of a conjugated diene such as 1,3-butadiene in hydrocarbon solution in the presence of a new catalyst composition comprising:(a) a dihydrocarbyl magnesium compound of 1-10 carbon atoms, preferably a dialkyl mag |
| 4148984 |
Catalyst system and process for polymerization of conjugatged dienes therewith |
April 10, 1979 |
| The catalyst system disclosed herein comprises one suitable for the polymerization of a conjugated diene, which system comprises a trihydrocarbyl aluminum compound, in which the hydrocarbyl group is an alkyl, aryl or cycloalkyl radical of 1-10 carbon atoms, and an alkali metal compou |
| 4139490 |
Dehydrocarbyl magnesium and an alkali metal compound catalyst composition for polymerizing conju |
February 13, 1979 |
| The process and catalyst system disclosed herein comprises the polymerization of a conjugated diene such as 1,3-butadiene in hydrocarbon solution in the presence of a new catalyst composition comprising:(a) a dihydrocarbyl magnesium compound of 1-10 carbon atoms, preferably a dialkyl mag |
