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Polymerization method for toluylene bisazo dye

A disazo dye and polymerization technology, applied in organic chemistry, sulfonate preparation, etc., can solve the problems of high cost, poor adaptability and diversity, and influence on polymerization reaction, and achieve large operating freedom and adaptability Strong, product-clean effect

Active Publication Date: 2019-01-04
NINGBO UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

One modification method is to convert dye molecules into polymerizable monomers and copolymerize them with other olefin monomers, but this method is costly and easily affects key polymerization reactions, and its adaptability and diversity are poor

Method used

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  • Polymerization method for toluylene bisazo dye
  • Polymerization method for toluylene bisazo dye
  • Polymerization method for toluylene bisazo dye

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Embodiment Construction

[0019] Below in conjunction with embodiment the present invention is described in further detail.

[0020] Preparation of functional initiators:

[0021] With stilbene bis-azophenol as the starting material, this material has been commercialized, so its preparation has a ready-made method, which will not be repeated here. The following are the specific preparation steps:

[0022] 1) Dissolve 0.1mol stilbene bis-azophenol in 400ml water, then add 0.2mol NaOH, gradually add 0.2mol epichlorohydrin under stirring, control the temperature of the reaction solution in the range of 50-55°C, and the reaction time at 3 ~4 hours, after completion, add 0.22mol ethanolamine, continue to react at 30~35°C for 2~3 hours, then acidify with hydrochloric acid until the pH value is in the range of 4.0~4.5, a large amount of yellow precipitate appears, collect the precipitated substance and wash it with clean water washing, vacuum drying after filtration;

[0023] 2) Dissolve the product obtaine...

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Abstract

The invention relates to a polymerization method for toluylene bisazo dye. An amphipathy compound containing a fluorescein perssad and a tertiary amine structure is synthesized and can be used as an initiator polymerized with free radicals, tertiary amine can be subjected to a redox reaction with potassium persulfate under the normal temperature, active free radicals are produced repeatedly, oil soluble monomer vinyl acetate polymerization is initiated on a water / oil interface, the obtained product is hydrolyzed to obtain a polymer containing a hydrophilic polyvinyl alcohol chain segment, andtherefore the purpose of toluylene bisazo dye polymerization is achieved. In this mode, functionalization and polymerization reactions do not interfere with each other, the operation degree of freedomis large, the product varieties are multiple, the polymerization reaction conditions are mild, no organic solvent or emulsifier is adopted, and the requirement for green chemistry is met.

Description

technical field [0001] The invention relates to the technical field of synthesis of functional polymer materials, in particular to a polymerized preparation technology of distyryl disazo dyes, through which the new synthesis technology can introduce distyrene disazo dye molecules into polyolefins In polymer materials, a new class of functional polymer materials and related application technologies are produced. Background technique [0002] Polyolefin is a very important general-purpose polymer material. It is formed by free radical polymerization of several olefin monomers. For different purposes, the structure can be adjusted according to the monomer copolymerization technology, so it is widely used. Initiators are essential in the preparation of polymer materials. The usual initiators are a class of compounds that can generate free radicals, such as oil-soluble peroxygen, azo initiators, and water-soluble persulfates. The use of an initiator must be coordinated with the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F118/08C08F8/00C08F4/40C07C303/32C07C309/46
CPCC07C303/32C07D301/28C07D303/30C08F4/40C08F8/00C08F118/08C07C309/46
Inventor 李艳张瑞丰李赛赛肖通虎龙能兵
Owner NINGBO UNIV
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