Preparation method of poly dialkyl diallyl ammonium halide

A technology of polydiallyl ammonium halide and dialkyl diallyl ammonium halide, which is applied in the field of preparation of cationic homopolymer products, and can solve the problem that the influence of product intrinsic viscosity is not obvious and the intrinsic viscosity does not have a series Controllable characteristics, harsh polymerization conditions and other problems, to achieve the effect of high relative molecular weight of the product, good economy and applicability, and little influence of impurities
CN100543047CInactive Publication Date: 2009-09-23NANJING UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NANJING UNIV OF SCI & TECH
Publication Date
2009-09-23
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a preparation method of polydialkyl diallyl ammonium halide. It uses the monomer dialkyldiallyl ammonium halide produced by the high-purity industrial one-step method with known main impurity content as the raw material. A step-by-step method of slowly initiating polymerization and high-temperature aging to increase the relative molecular mass of the product polydialkyl diallyl ammonium halide. At the same time, only by adjusting the initial monomer content and the amount of initiator in the reaction system to control the relative molecular weight of the product to achieve serialization. The invention has industrial application prospects, and because the polymerization reaction is less affected by impurities, the preparation process has good stability; the initiation temperature is lowered, and the polymerization reaction is easy to operate at a lower temperature; the rate of decomposition and initiation of the initiator is controlled, and the polymerization The reaction proceeds smoothly at a lower initiator concentration, and it is easy to obtain polydialkyldiallyl ammonium halide products with higher relative molecular weight.
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Description

technical field

[0001] The invention belongs to the preparation technology of cationic homopolymerization products, in particular to a preparation method of polydialkyl diallyl ammonium halide. Background technique

[0002] Polydialkyl diallyl ammonium halide is a kind of cationic polyquaternary ammonium salt, its molecular structure and preparation reaction formula are as follows:

[0003]

[0004] In the formula, n=2, 3, 4, ... n; m = 2, 3, 4, ... m. Among them, R is preferably a hydrogen atom or C 1～18 The alkyl group, Y is preferably halogen F, Cl, Br and I. In this class of compounds, polydimethyldiallyl ammonium chloride (Poly-Dimethyldiallyl ammonium chloride, referred to as PDMDAAC) is one of the most ideal cationic polyquaternary ammonium salts. PDMDAAC is a water-soluble linear polymer with cationic groups on its molecular chain, and it is also a cationic polyelectrolyte. PDMDAAC is a white easily absorbent powder, soluble in water, methanol and glacial acet...

Claims

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