Two-stage material-feeding random gradually-varied butylbenzene co-polymer and preparation method thereof

A styrene-butadiene copolymer and gradient copolymerization technology, applied in the field of random gradient styrene-butadiene copolymer and its preparation, can solve the problems of difficulty in alternating control, complicated process, long feeding time, etc., and achieve better toughening effect and preparation Simple method and increased toughening effect
CN104292408AActive Publication Date: 2015-01-21CHINA PETROLEUM & CHEM CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEM CORP
Publication Date
2015-01-21

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Abstract

The invention discloses a two-stage material-feeding random gradually-varied butylbenzene co-polymer and a preparation method thereof. The co-polymer includes a butylbenzene random gradually-varied co-copolymerized segment and a polystyrene homo-polymerized segment. The preparation method includes following steps: controlling temperature of a reactor being filled with a non-polar hydrocarbon solvent, an activity regulating agent and an initiator; adding a mixed monomer including styrene and butadiene; carrying out a first-stage random polymerization reaction; adding styrene for carrying a further reaction; and adding a terminator for stopping the reactor after the reacting completed. The preparation method is simple in process, is easy to carry out and is mild in reaction conditions. The random gradually-varied butylbenzene co-polymer, when being used for modifying ABS resin, has an excellent toughening effect, a good mechanical performance and an excellent glossiness.
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Description

technical field

[0001] The invention relates to a random gradient styrene-butadiene copolymer and a preparation method thereof, belonging to the field of styrene-butadiene rubber synthesis. Background technique

[0002] The styrene-butadiene polymer structures that have been found include block, tapered and random structures. There are many patent documents related to reported styrene-butadiene block polymers, such as EP0492490, US4925899, US5130377, CN85100418 and so on. With the improvement of polymer performance requirements, inventors have designed various structures. Japanese Patent Laid-Open Application 52-58788 (corresponding to U.S. Patent 4,167,545) discloses branched block copolymers prepared by distributive addition of a catalyst to a block polymerization system. CN1241582A and WO96 / 25442 disclose the preparation method of styrene-butadiene polymer containing tapered segments. The formation of the gradual transition section is obtained by prolonging the feeding...

Claims

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