Photometer-controlled anionic polymerization

Details Photometer-controlled anionic polymerization Photometer-controlled anionic polymerization

1982-03-30

1983-08-02

Levin, Stanford M.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525314, 526 60, 526340, C08F 448, C08F29704

Patent

active

043967418

ABSTRACT:
Random monoalkenyl arene-conjugated diene copolymers are produced by controlling the continuous rate of addition of the conjugated diene monomer to a reactor containing the monoalkenyl arene monomer, organolithium initiator and solvent, the rate being adjusted in response to the photometer measured presence of an active chromophore comprising a lithium ion directly associated with a poly(monoalkenyl arene) carbanion.

REFERENCES:
patent: 2975160 (1961-03-01), Zelinski
patent: 3094512 (1963-06-01), Short
patent: 3366611 (1968-01-01), Wofford
patent: 3496154 (1970-02-01), Wofford
patent: 3498960 (1970-03-01), Wofford
patent: 3553295 (1971-01-01), Bean et al.
patent: 3673166 (1972-06-01), Trepra
patent: 3743629 (1979-07-01), Fraga

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