Process for anionic polymerization
Patent 4725654 Issued on February 16, 1988. Estimated Expiration Date: 
February 16, 2005. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
February 16, 2005. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3290116 3743629 InventorsApplicationNo. 06/525863 filed on 08/24/1983US Classes:526/60, Change responsive to composition property other than density526/173, Material contains elemental alkali metal, hydride thereof, or alkali metal to carbon atom bond (Li, Na, K, Rb, Cs, Fr)526/346, From aromatic hydrocarbon526/347, Interpolymerized526/347.1, Monomer other than styrene526/64, POLYMERIZING IN TUBULAR OR LOOP REACTOR526/88Polymerization involving specified mixing, stirring, agitating, or movement of materialExaminersPrimary: Schofer, Joseph L.Assistant: Teskin, F. M. International ClassesB01J 19/18 (20060101)B01J 19/00 (20060101) C08F 2/00 (20060101) AbstractControl of an anionic polymerization is obtained by monitoring an indicator of molecular weight of the polymer in the polymerizing mixture, measuring the molecular weight of the polymer produced therein and using this information to control the rate at which polymerization initiator is added to the polymerizing mixture in a continuous stirred tank reactor.Other References
Field of SearchPOLYMERIZING IN TUBULAR OR LOOP REACTORChange responsive to composition property other than density Polymerization involving specified mixing, stirring, agitating, or movement of material Material contains elemental alkali metal, hydride thereof, or alkali metal to carbon atom bond (Li, Na, K, Rb, Cs, Fr) From aromatic hydrocarbon Interpolymerized Monomer other than styrene | |
