US Patent No: 5,610,227
Number of patents in Portfolio can not be more than 2000
Lithium amino magnesiate polymerization initiators and elastomers having reduced hysteresis
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Mar 11, 1997
Issued date -
Jun 7, 1995
filing date -
08/487,349
serial no -
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Abstract
The present invention provides anionic polymerization initiators, comprising lithium amino magnesiate complexes, resulting in diene polymer and copolymer elastomers. The invention initiators have stable living ends at high polymerization temperatures and produce polymers containing a high level of tertiary amine functionality. Such polymers exhibit an increased efficiency in coupling termination reactions, and elastomers and products prepared from such polymers exhibit reduced hysteresis properties. Methods are also provided for preparing the initiators, the polymers and the elastomers.
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First Claim
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
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| 5,066,729 Diene polymers and copolymers terminated by reaction with N-alkyl and N-aryl imines | 88 | 1990 | |
| 5,268,439 Tin containing elastomers and products having reduced hysteresis properties | 43 | 1991 | |
| 5,268,413 Elastomers and products having reduced hysteresis | 17 | 1991 | |
| 5,354,822 Methods for preparing functionalized polymer and elastomeric compounds having reduced hysteresis | 23 | 1992 | |
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| 4,401,800 Lithium alkoxide diamines as modifiers for polymerization of dienes using lithium-based initiators | 7 | 1982 | |
| 4,429,091 Oligomeric oxolanyl alkanes as modifiers for polymerization of dienes using lithium-based initiators | 98 | 1983 | |
| 4,520,123 Catalyst system and process for polymerizing conjugated dienes | 28 | 1984 | |
| 4,672,097 Process and system for preparing random copolymers having low vinyl contents | 7 | 1986 | |
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| 5,238,893 Method of preparing an anionic polymerization initiator | 40 | 1991 | |
| 5,329,005 Soluble anionic polymerization initiators and preparation thereof | 54 | 1992 | |
| 5,332,810 Solubilized anionic polymerization initiator and preparation thereof | 57 | 1992 | |
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| 4,861,742 Bifunctional alkali metal compounds, preparation and use thereof as polymerization initiators | 14 | 1988 | |
| 5,321,093 Living polymers, the preparation thereof and the use thereof for preparing telechelic polymers | 14 | 1991 | |
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| 4,530,984 Process for production of polymers having increased 1,2-microstructure | 7 | 1984 | |
| 5,393,721 Anionic polymerization initiators and reduced hysteresis products therefom | 42 | 1992 | |
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| 4,634,786 Hydrocarbon and chlorinated hydrocarbon-soluble magnesium dialkoxides | 7 | 1984 | |
| 4,748,283 Hydrocarbon and chlorinated hydrocarbon-soluble magnesium dialkoxides | 5 | 1987 | |
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| 4,476,240 Catalyst system containing an anionic initiator based on lithium and phosphine oxide modifier | 55 | 1982 | |
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| 5,320,774 Preparation of organometallic amide compositions | 5 | 1989 | |
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| 4,537,789 Process for preparing retort tofu | 5 | 1983 | |
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| 4,618,485 Kinetic radioimmunoassay test method and device | 3 | 1982 | |
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| 4,480,075 Block copolymers of Ziegler-Natta polymerized and anionically polymerized monomers | 27 | 1983 | |
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| 4,603,388 VTOL altitude hold system with automatic ground effect compensation | 14 | 1983 | |
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| 4,960,842 Amine containing initiator system for anionic polymerization | 18 | 1989 | |
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| 4,410,742 Organomagnesium alkoxides and method for making the same | 8 | 1982 | |