Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Reexamination Certificate
2008-01-09
2010-11-16
Teskin, Fred M (Department: 1796)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
C526S173000, C528S501000, C528S50200C, C528S50200C
Reexamination Certificate
active
07834111
ABSTRACT:
A terminating agent and a method for preparing an anionic polymer are provided. The terminating agent includes a carbohydrate, which is a solid substantially insoluble in a solvent and is used for terminating an anionic polymerization of a polymer. Another aspect of the method includes steps which provide an initiator for initiating an anionic polymerization, adding a terminating agent for terminating the anionic polymerization and forming a complex, wherein the terminating agent is a carbohydrate, and an alkali metal ion is removed by a solid-liquid separation process.
REFERENCES:
patent: 2719179 (1955-09-01), Mora et al.
patent: 2009/0043055 (2009-02-01), Luo et al.
Enholm et al, Free Radical Allyl Transfers Utilizing . . . Polystyrene and Carbohydrate Scaffold Supports, Organic Letters, 2000, 2(21), 3355-3357.
Hsieh Chi-Chen
Tsai Chih-Kuang
Wang Tsung-Yuan
Teskin Fred M
TSRC Corporation
Volpe and Koenig P.C.
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