Method for the continuous manufacture of hydrocarbon resins

Details Method for the continuous manufacture of hydrocarbon resins Method for the continuous manufacture of hydrocarbon resins

1977-03-16

1978-07-11

Holler, Alan

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

Synthetic resins

Removing and recycling removed material from an ongoing...

526 86, 526 87, 526237, 526282, 526283, 526290, 526308, C08F 414, C08F 3206, C08F 3208, C08F 1206

Patent

active

041003365

ABSTRACT:
A method for the continuous manufacture of hydrocarbon resins starting from polymerizable insaturated hydrocarbons adapted to selectively obtain clear resins having well determined viscosities or softening points and to control the temperature of the polymerization reaction conducted in the presence of a Lewis acid as catalyst and recycling a fraction of the reaction mixture, due to the improvement comprising the steps of forming a close mixture of the catalyst and of the hydrocarbon fraction to be polymerized in a reactor, said mixture containing, by weight, from 0.05 to 0.8 part, and preferably from 0.1 to 0.4 part, of catalyst for 100 parts of hydrocarbons, diluting and dispersing said mixture homogeneously by means of, and/in, a portion of stream of the medium issuing from the reactor in the proportion of from 60 to 300 parts, by volume, of said stream, and preferably of from 80 to 140 parts, for one part, by volume, of the hydrocarbon fraction to be polymerized, said polymerization being, in addition, contingently carried out in the presence of water added in the proportion of from 0 to 2.2 moles per mole of catalyst, and drawing off the remaining portion of the medium issuing from the reactor so as to isolate the resin obtained therefrom, the temperature of the reaction medium being maintained constant through heat-exchange, between 30.degree. and 120.degree. C, and preferably between 40.degree. and 110.degree. C, for a dwell time of from 10 to 60 minutes, and preferably of from 20 to 40 minutes, in the reactor.

REFERENCES:
patent: 2340413 (1944-02-01), Cline et al.
patent: 2677002 (1954-04-01), Yahnke et al.
patent: 2697694 (1954-12-01), Shalit et al.
patent: 2708639 (1955-05-01), Miller
patent: 2770613 (1956-11-01), Tegge et al.
patent: 3478005 (1969-11-01), Wheeler
patent: 3778421 (1973-12-01), Hayashi et al.
patent: 3846352 (1974-11-01), Bullard et al.
Hydrocarbon Processing and Petroleum Refiner, Jul. 1964, vol. 42, No. 7, "How to Make Polybutadiene Resins," pp. 165-168.

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