Preparation of copolmers of ethylene with acrylic acid esters in

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymerizing in tubular or loop reactor

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526 79, 526 87, 52631845, 526329, C08F 200, C08F 238, C08F22002, C08F22010

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active

047882654

ABSTRACT:
Copolymers of ethylene with acrylates or solutions of free acrylic acid in acrylates are prepared in a continuously operated tubular polymerization system at high pressures and temperatures by feeding a mixture of ethylene, acrylate, initiator and, if appropriate, regulant into the polymerization system in the form of a main stream at the inlet point thereof and at the same time through two or more secondary streams, 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: 4076919 (1978-02-01), Urban et al.
patent: 4135044 (1979-01-01), Beals
patent: 4579918 (1986-04-01), Metzger et al.

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