Water solution polymerization preparation method for dimethyl diallyl ammonium chloride and acrylamide copolymers

A technology of dimethyl diallyl ammonium chloride and acrylamide copolymer, which is applied in the field of preparation of water-soluble polymers, and can solve the problems of restricting the industrial application of the preparation process, low molecular weight of PDA products, and restricting the industrialization of the preparation process, etc. problems, to achieve the effect of simple production process, low material cost and high relative molecular weight

Inactive Publication Date: 2008-05-28
NANJING UNIV OF SCI & TECH
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  • Abstract
  • Description
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Problems solved by technology

[0014] (1) Special requirements are put forward for the purity of monomer raw materials, especially cationic monomers, which limits the industrialization of the preparation process, such as Document 1, Document 3 and Document 6;
[0015] (2) A composite initiator containing water-soluble azo substances with low industrialization degree and high cost is selected, which limits the industrial application of the preparation process
[0017] (4) Though adopt cheap and easy industrialized initiator and industrial monomer, the relative molecular weight of gained PDA product is relatively low, and cationic degree kind is single, for example document 2

Method used

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  • Water solution polymerization preparation method for dimethyl diallyl ammonium chloride and acrylamide copolymers
  • Water solution polymerization preparation method for dimethyl diallyl ammonium chloride and acrylamide copolymers
  • Water solution polymerization preparation method for dimethyl diallyl ammonium chloride and acrylamide copolymers

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Embodiment 1

[0046] Embodiment 1: the step of the aqueous solution polymerization system method of the copolymer PDA of dimethyl diallyl ammonium chloride of the present invention and acrylamide is:

[0047] In the first step, add 0.28kg of industrial one-step cationic monomer DMDAAC solution with a mass fraction of 60% in a 15L reactor at room temperature (≤25°C), 1.42kg of industrial monomer AM dry powder (or 4.73kg of an aqueous solution containing AM30%) ), through N 2 Add 0.04kg of ammonium persulfate with a mass fraction of 0.36% and an initiator solution with a mass ratio of ammonium persulfate to sodium bisulfite of 1:2.00±0.05, and add 8.20kg (or 4.89kg) of deionized water under stirring;

[0048] The second step is to enter N 2 , stir and heat up the reaction solution to the polymerization temperature of 28±2°C, stop stirring, and pass N 2 , react for 3 to 4 hours;

[0049] The third step is to reheat the reaction system to the polymerization temperature of 60±2°C and react fo...

Embodiment 2～7

[0052] Embodiments 2-7: Except that the preparation conditions and results different from Embodiment 1 are listed in the following table, all the other steps are the same as Embodiment 1.

[0053] Preparation process conditions and product properties different from embodiment 1 in embodiment 2~7

[0054]

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Abstract

The invention discloses a water solution polymerization production method of dimethyl diallyl ammonium chloride and acrylamide copolymer, which uses cation industrial monomer DMDAAC and industrial non-ionic monomer AM prepared by industrial one-step method as raw materials, uses initiator via water solution polymerization to prepare dimethyl diallyl ammonium chloride and acrylamide copolymer, with high relative molecular weight and cation degree serialization. The invention uses cheap materials, has wide adjustable proportion between oxidant and reducer in initiator, and the application for initializing polymerization temperature of different cation degree PDA products. The invention has simple and mild reaction condition, while the PDA product cation degree is 5-99%, relative characteristic viscosity is 17.0-2.9dL/g, and residual monomer content is lower than 1%. The product has high cation degree serialization, high relative molecular weight of PDA product in each cation degree, strong adaptability, simple method, easy industrialization, and wide application in oil development, paper making, mining, weaving, dying, water treatment, and daily chemical or the like.

Description

a technical field [0001] The invention relates to the preparation technology of water-soluble high molecular polymers, in particular to a serialized water-soluble cationic high molecular polymer dimethyl diallyl ammonium chloride and acrylamide copolymer aqueous solution polymerization method. Two background technology [0002] Dimethyldiallyl ammonium chloride (DMDAAC) and acrylamide (Acrylamide, AM) copolymer (Poly-Dimethyldiallyl ammonium chloride-Acrylamide, PDA) is a cationic polyelectrolyte. PDA is colloid or white water-absorbing powder, soluble in water, methanol and glacial acetic acid, insoluble in other solvents, and its aqueous solution is neutral. Because its molecular structure has the characteristics of adjustable positive charge density on the macromolecular chain, good water solubility, high efficiency and non-toxicity, stable cationic unit structure, and wide application range of pH, it is widely used in petroleum exploration, papermaking, mining, Textile ...

Claims

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Application Information

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IPC IPC(8): C08F220/56C08F236/00C08F2/10C08F6/00
Inventor 张跃军毕可臻
Owner NANJING UNIV OF SCI & TECH
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