A kind of production technology of styrene-maleic anhydride copolymer

A production process, technology of maleic anhydride, applied in the field of production process of styrene/maleic anhydride copolymer, can solve problems such as inability to stop reaction and control reaction amount at any time, achieve good product stability, uniform product structure, suitable for The effect of industrial production

Active Publication Date: 2017-11-24
SHANGHAI PHICHEM MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the process of realizing the present invention, the inventors have found that the prior art has at least the following problems: the reaction monomer and the initiator are dissolved in the liquid medium at the same time to react, and the reaction cannot be stopped at any time and the amount of reaction cannot be controlled

Method used

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  • A kind of production technology of styrene-maleic anhydride copolymer
  • A kind of production technology of styrene-maleic anhydride copolymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] 77.6 kg of maleic anhydride and 8.0 kg of azobisisobutyronitrile were simultaneously dissolved in 80.0 kg of butanone to prepare reaction solution A; 82.3 kg of styrene was reaction solution B.

[0063] The reaction medium in the reaction kettle is 160.0 kg butanone, and the temperature of the reaction medium in the reaction kettle is controlled at 80° C. through an oil bath. Reaction solution A and reaction solution B are continuously dripped into the reactor simultaneously with different pipelines respectively, and the feed rate of control reaction solution A is 0.460kg / min, and the feed rate of control reaction solution B is 0.229kg / min. Liquid A and reaction liquid B were added dropwise for 6 hours at the same time, and reacted for 1 hour after the dropwise addition to end the reaction. After raising the temperature and distilling butanone under reduced pressure, the material in the reactor is melted and discharged, and a solid SMA product is obtained after cooling....

Embodiment 2

[0065] Dissolve 5.4kg of azobisisobutyronitrile in 60.0kg of methyl ethyl ketone to prepare reaction solution A; 25.8kg of maleic anhydride and 82.3kg of styrene are mixed and dissolved to form reaction solution B.

[0066] The reaction medium in the reaction kettle is 103.5 kg butanone, and the temperature of the reaction medium in the reaction kettle is controlled at 70° C. through an oil bath. Reaction solution A and reaction solution B are continuously dripped into the reactor simultaneously with different pipelines respectively, and the feed rate of control reaction solution A is 0.136kg / min, and the feed rate of control reaction solution B is 0.225kg / min. Solution A and reaction solution B were added dropwise for 8 hours at the same time, and reacted for 2 hours after the dropwise addition to end the reaction. After raising the temperature and distilling butanone under reduced pressure, the material in the reactor is melted and discharged, and a solid SMA product is obta...

Embodiment 3

[0068] 19.4kg of maleic anhydride and 5.1kg of azobisisobutyronitrile were dissolved in 25.0kg of methyl ethyl ketone to prepare reaction solution A; 82.3kg of styrene was reaction solution B.

[0069] The reaction medium in the reaction kettle is 45.0 kg butanone, and the temperature of the reaction medium in the reaction kettle is controlled at 80° C. through an oil bath. Reaction solution A and reaction solution B are continuously dripped into the reactor simultaneously with different pipelines respectively, and the feed rate of control reaction solution A is 0.215kg / min, and the feed rate of control reaction solution B is 0.274kg / min. Solution A and reaction solution B were added dropwise for 5 hours at the same time, and reacted for 1 hour after the dropwise addition to end the reaction. After raising the temperature and distilling butanone under reduced pressure, the material in the reactor is melted and discharged, and a solid SMA product is obtained after cooling.

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Abstract

The present invention discloses a styrene-maleic anhydride copolymer production process, and belongs to the field of styrene-maleic anhydride copolymers. The production process comprises: dividing styrene, maleic anhydride and an initiator into at least two groups, and dissolving at least the two groups or the non-liquid state group in at least the two groups in a solvent to obtain at least two reaction solutions; and continuously adding the at least two reaction solutions to a high temperature solvent respectively through different material feeding pipelines according to a certain flow rate ratio to carry out a reaction to prepare the styrene-maleic anhydride copolymer. According to the present invention, styrene, maleic anhydride and the initiator are made into at least two reaction solutions, and the reaction solutions are continuously added to the reaction kettle through different pipelines, such that styrene, maleic anhydride and the initiator always react in the same ratio so as to ensure the uniformity of the product structure, make heat emission stable during the reaction, and easily control the reaction; and the reaction can be terminated at any time according to the actual situation, and the amount of the reaction can be controlled.

Description

technical field [0001] The invention relates to the field of styrene-maleic anhydride copolymers, in particular to a production process of styrene / maleic anhydride copolymers. Background technique [0002] SMA (styrene-maleic anhydride copolymer, styrene-maleic anhydride copolymer) is a new type of polymer material with excellent performance and low price. It is widely used in the fields of water treatment agent, latex paint, adhesive modifier, pigment dispersant, floor polishing emulsifier, pesticide emulsifier and epoxy resin curing agent. [0003] At present, the production methods of SMA mainly include precipitation polymerization, bulk polymerization and solution polymerization. Among them, the solution polymerization method uses a solvent as a medium, which is easy to transfer reaction heat and is beneficial to control production. The obtained SMA product has a relatively regular structure and a narrow molecular weight distribution, which is conducive to improving the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F212/08C08F222/06C08F2/06C08F4/04C08F4/34
Inventor 钟亮刘翘楚李海荣季冬晨
Owner SHANGHAI PHICHEM MATERIAL CO LTD
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