Organic compounds -- part of the class 532-570 series – Organic compounds – Heavy metal containing
Patent
1996-12-31
1999-03-02
Shaver, Paul F.
Organic compounds -- part of the class 532-570 series
Organic compounds
Heavy metal containing
526173, 526176, 526190, 526336, 526335, 526340, 524571, 524572, 524575, 525248, 525370, 525375, 5253323, 5253329, 5253319, 502152, C07F 722
Patent
active
058773363
ABSTRACT:
Triorgano substituted-tin lithium initiators are made in a dimethyl ether solvent. The substitution of dimethyl ether as the solvent for the traditional tetrahydrofuran solvent results in an initiator for anionic polymerizations that can produce less 1,2-vinyl repeat units. The dimethyl ether is also easier to remove from the polymerization media because it has a boiling point at one atmosphere of minus 24.8.degree. C. and thus is a gas at 25.degree. C.
REFERENCES:
patent: 5268439 (1993-12-01), Hergenrother et al.
patent: 5288886 (1994-02-01), Becker et al.
patent: 5502129 (1996-03-01), Hergenrother et al.
Bethea Tristram W.
Hergenrother William L.
Bridgestone Corporation
Hall Daniel N.
Shaver Paul F.
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