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Method for preparing copolymer of dimethyl diallyl ammonium chloride and acrylamide through initiation of composite initiator

A technology of dimethyl diallyl ammonium chloride and acrylamide copolymer, which is applied in the field of compound initiator to initiate the preparation of dimethyl diallyl ammonium chloride and acrylamide copolymer, which can solve the problem of inability to resist polymerization inhibition Effect, unstable preparation process and other problems, to achieve the effect of high relative molecular weight of the product, increase the relative molecular weight of the product, and high relative molecular weight

Active Publication Date: 2011-10-05
NANJING UNIV OF SCI & TECH
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  • Description
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Problems solved by technology

[0011] (3) Since the polymerization system has no metal ion chelating agent, it can only be carried out in a clean reactor, which cannot resist the polymerization inhibition effect of metal ions brought in by raw materials or produced by metal pipes, valves, etc. on the polymerization reaction, resulting in unstable preparation process. Such as literature 1, 2

Method used

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  • Method for preparing copolymer of dimethyl diallyl ammonium chloride and acrylamide through initiation of composite initiator
  • Method for preparing copolymer of dimethyl diallyl ammonium chloride and acrylamide through initiation of composite initiator

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Embodiment 1

[0027] Embodiment 1: the steps of the method for making dimethyldiallyl ammonium chloride and acrylamide copolymer initiated by composite initiator of the present invention are:

[0028] In the first step, add 0.28kg of high-purity industrial product DMDAAC monomer aqueous solution with a mass fraction of (60±2)% and 1.42kg of AM crystals into a 15L reactor at room temperature (≤30°C), and add them in sequence under nitrogen gas stirring Contains 0.32g tetrasodium edetate (Na 4 EDTA) in 0.1L chelating agent solution, 0.1L low temperature initiator solution containing 0.08g azobisisopropylimidazoline hydrochloride (AIBI) and 0.1L high temperature initiator solution containing 0.81g ammonium persulfate (APS) , add deionized water 7.93kg;

[0029] In the second step, stop stirring, stop nitrogen flow, heat up the reaction system to a polymerization temperature of 46±2°C, and react for 4 hours;

[0030] The third step is to heat up the reaction system to a polymerization tempera...

Embodiment 2～7

[0033] Embodiments 2-7: Except that the preparation process conditions and results different from Embodiment 1 are listed in the following table, all the other steps are the same as Embodiment 1.

[0034]

Embodiment 9

[0035] Embodiment 9: The steps of the method for the composite initiator of the present invention to initiate the preparation of dimethyl diallyl ammonium chloride and acrylamide copolymer are:

[0036]In the first step, add 1.35kg of high-purity industrial product DMDAAC monomer aqueous solution with a mass fraction of (60±2)% and 1.42kg of AM crystals into a 15L reactor at room temperature (≤30°C), and add them in sequence under nitrogen gas stirring Contains 0.45g tetrasodium edetate (Na 4 0.1L chelating agent solution containing EDTA), 0.1L low-temperature initiator solution containing 0.11g azobisisopropylimidazoline hydrochloride (AIBI) and 0.1L high-temperature initiator solution containing 0.11g ammonium persulfate (APS) , add deionized water 5.03kg;

[0037] In the second step, stop stirring, stop nitrogen flow, heat up the reaction system to a polymerization temperature of 46±2°C, and react for 4 hours;

[0038] The third step is to heat up the reaction system to a...

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Abstract

The invention discloses a method for preparing a copolymer of dimethyl diallyl ammonium chloride and acrylamide through initiation of a composite initiator. In the method, powder products of the copolymer of dimethyl diallyl ammonium chloride and acrylamide are prepared by taking high-purity industrial products, i.e., dimethyl diallyl ammonium chloride monomers and acrylamide monomers as raw materials, adding a metallic ion chelating agent and the composite initiator, initiating polymerization to produce colloidal products through heating in three steps, and then drying and crushing. In the invention, the content of various main impurities in the high-purity industrial products, i.e., cationic monomers and nonionic monomer materials, is known, and the upper limit of the content is defined, the process for preparing the products through copolymerizing the monomers has good stability, and the products have high relative molecular mass; the obtained PDA (Poly(DMDAAC-co-AM) products have high seriation degree of cationic degree, and the PDA products have high relative molecular mass under each cationic degree and a broad application range and can be more widely applied to a plurality of fields such as oil exploitation, papermaking, mining, textile printing and dyeing, daily-use chemical industry, water treatment and the like.

Description

technical field [0001] The invention belongs to the preparation technology of water-soluble polymer compounds, in particular to a method for preparing a copolymer of dimethyl diallyl ammonium chloride and acrylamide initiated by a compound initiator. Background technique [0002] Poly(DMDAAC- co -AM) (abbreviated as PDA), is a cationic polyelectrolyte with adjustable positive charge density on the macromolecular chain, stable cationic unit structure, relative molecular mass and cationic degree are easy to control through different preparation process conditions, Good water solubility, high efficiency and non-toxic, wide range of pH application, etc., widely used in petroleum exploration, papermaking, mining, textile printing and dyeing, daily chemical industry and water treatment and other fields. The reaction expression for generating PDA by DMDAAC and AM through free radical copolymerization is as follows: [0003] [0004] At present, the basic industrial production ...

Claims

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Application Information

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IPC IPC(8): C08F220/56C08F226/02C08F4/04C08F4/30
Inventor 张跃军毕可臻
Owner NANJING UNIV OF SCI & TECH
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