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Preparation method of styrene/N-phenylmaleimide binary copolymer

A maleimide binary copolymer and maleimide technology are applied in the field of preparing styrene/N-phenylmaleimide binary copolymer by coordination polymerization, which can solve the problem of affecting the copolymer. Quality, difficult to remove and other problems, to achieve the effect of less impurity content, easy temperature control, and low impurity content

Inactive Publication Date: 2012-06-20
HANGZHOU KELI CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the use of dispersants and emulsifiers in the suspension polymerization and emulsion polymerization methods, a small amount of dispersant or emulsifier residues are attached to the copolymer, which is difficult to completely remove, which will affect the quality of the copolymer

Method used

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  • Preparation method of styrene/N-phenylmaleimide binary copolymer
  • Preparation method of styrene/N-phenylmaleimide binary copolymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A method for preparing styrene / N-phenylmaleimide binary copolymer, operates according to the following steps:

[0022] Add 0.003mol La(P 507 ) 3 , 0.005mol triethylaluminum, 0.6mol N-phenylmaleimide, 1.2mol styrene and 1L toluene, reacted at 50°C for 5 hours, terminated the reaction with 1ml ethanol solution containing 5% hydrochloric acid, and reacted The mixture was poured into ethanol to precipitate the copolymer, and then filtered and dried to obtain the finished product.

[0023] The styrene / N-phenylmaleimide binary copolymer productive rate of present embodiment gained is 45%, and number average molecular weight is 3.5 * 10 4 , the molecular weight distribution is 7.2.

Embodiment 2

[0025] A method for preparing styrene / N-phenylmaleimide binary copolymer, operates according to the following steps:

[0026] Add 0.005mol La(P 204 ) 3 , 0.03mol trimethylaluminum, 0.7mol N-phenylmaleimide, 1.3mol styrene and 1L benzene, reacted at 45°C for 6 hours, terminated the reaction with 1ml ethanol solution containing 5% hydrochloric acid, and the reaction The mixture was poured into ethanol to precipitate the copolymer, and then filtered and dried to obtain the finished product.

[0027] The styrene / N-phenylmaleimide binary copolymer productive rate of present embodiment gained is 85%, and number average molecular weight is 25 * 10 4 , the molecular weight distribution is 4.8.

Embodiment 3

[0029] A method for preparing styrene / N-phenylmaleimide binary copolymer, operates according to the following steps:

[0030] Add 0.01mol Nd(P 507 ) 3 , 0.02mol trimethylaluminum, 0.03mol triethylaluminum, 0.6mol N-phenylmaleimide, 1.2mol styrene and 1L toluene, react at 50°C for 5 hours, and use 1ml of 5% hydrochloric acid The ethanol solution terminates the reaction, the reactant is poured into ethanol to precipitate the copolymer, and then filtered and dried to obtain the finished product.

[0031] The styrene / N-phenylmaleimide binary copolymer productive rate that the present embodiment gained is 96%, and number average molecular weight is 41 * 10 4 , the molecular weight distribution is 2.1.

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Abstract

The invention relates to a preparation method of a styrene / N-phenylmaleimide binary copolymer, comprising the following steps: adding styrene, N-phenylmaleimide and rare earth catalyst system to a solvent proportionally, polymerizing at 40-60 DEG G for 4-6 h, stopping the reaction by using an ethanol solution containing 5% hydrochloric acid, decanting the reaction products into ethanol to precipitate out the copolymer, and filtering and drying the precipitate to obtain the finished product, wherein the rare earth catalyst system is a binary component of a trivalent rare earth organic compound and an organic aluminum compound.

Description

technical field [0001] The invention relates to a method for preparing styrene / N-phenylmaleimide binary copolymer, in particular to a coordination polymerization method using a rare earth organic complex as a catalyst to prepare styrene / N-phenyl Process for binary copolymers of maleimide. Background technique [0002] N-phenylmaleimide is a new type of resin modified monomer developed in recent decades. Due to the existence of its unique five-membered imide ring, the polymer has good heat resistance. It After copolymerization with general-purpose monomer styrene, the glass transition temperature and thermal decomposition temperature of the polymer can be increased, and the processing performance of the material can be improved. With the increasing requirements for materials, research in this area has been paid more and more attention. [0003] At present, the methods for synthesizing N-phenylmaleimide-containing copolymers are mostly based on the mechanism of free radical ...

Claims

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Application Information

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IPC IPC(8): C08F212/08C08F222/40C08F4/52
Inventor 孙锦伟刘毓红刘志超孔诚孔飞城
Owner HANGZHOU KELI CHEM CO LTD
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