Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymerizing in tubular or loop reactor
Patent
1987-04-22
1988-12-27
Schofer, Joseph L.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymerizing in tubular or loop reactor
526 79, 526 86, 526 87, 526 88, 526331, C08F22040, C08F 238, C08F 200
Patent
active
047940042
ABSTRACT:
Copolymers of ethylene with vinyl esters are prepared in a continuously operated tubular polymerization system at high pressure and temperatures by feeding a mixture of ethylene, vinyl ester, initiator and, if appropriate, regulant into the polymerization system in the form of a mainstream at the inlet point thereof and at the same time through two or more secondary streams downstream of the inlet point, secondary streams (I) being metered in at points where the reaction temperature has just exceeded a maximum temperature due to the heat of polymerization and secondary streams (II) at points which, relative to the direction of flow of the ethylene, are upstream of the feed points of secondary streams (I) and upstream of the respective maximum temperature.
REFERENCES:
patent: 3725378 (1973-04-01), Chamberlin
patent: 3917577 (1975-11-01), Trieschmann et al.
patent: 4042767 (1977-08-01), Payer et al.
patent: 4048411 (1977-09-01), Mietzner et al.
patent: 4135044 (1979-01-01), Beals
patent: 4579918 (1986-04-01), Metzger et al.
Boettcher Klaus
Buechner Oskar
Kanne Friedrich
Kursawe Siegfried
Pfleger Klaus
BASF - Aktiengesellschaft
Schofer Joseph L.
Teskin F. M.
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