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

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 ...

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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, document 4, document 5, document 6;

[0018] (5) In particular, the product preparation method obtained by removing unreacted monomers and small molecule methods with a solvent for the product PDA colloid can only be used for analysis, measurement and theoretical research, and is difficult for industrial practical application, such as document 4 and document 6

[0019] The above-mentioned various defects have caused so far that it is difficult to obtain an industrialized preparation method for aqueous solution polymerization of PDA products with high relative molecular weight and high degree of cationicity by using various existing processes.

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