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Preparation method of polyacrylamide emulsion

A polyacrylamide and acrylamide technology, which is applied in the fields of paper, textiles and papermaking, and non-fibrous pulp addition, can solve the problems of mesh blockage in the wire part of the paper machine, difficulty in achieving retention and filtering effects, and difficulty in dehydration.

Active Publication Date: 2013-08-07
JIANGSU FEYMER TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the retention and drainage system of this product, since the main molecule is still starch, it is difficult to achieve the effect of retention and drainage, and the introduction of starch will easily block the wire part of the paper machine, resulting in difficulty in dehydration

Method used

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  • Preparation method of polyacrylamide emulsion
  • Preparation method of polyacrylamide emulsion
  • Preparation method of polyacrylamide emulsion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Place 126 g of acrylamide, 118 g of acrylic acid, 8 g of starch, 0.16 g of disodium edetate, 0.017 g of urea, 0.03 g of ammonium persulfate, and 150 deionized water in a beaker. Stir to completely dissolve all materials, slowly add 160 g of 40 wt.% sodium hydroxide solution, and continue to add 40 wt.% sodium hydroxide dropwise until the system pH=7.0, and configure it as an aqueous phase for use. In a four-necked flask (the four-necked flask is equipped with a stirring blade, a thermometer, and a nitrogen inlet and outlet respectively), 28.7g sorbitan glycerate (referred to as Span 80) and 3.3g sorbitan monostearate polyoxyethylene ether (Tween 60 for short) was added to 208g 5# white mineral oil and stirred to completely dissolve it. Under stirring conditions, the water phase was added dropwise to the oil phase. After the addition, the stirring and emulsification were continued for 30 minutes, and then the homogenizer was used for emulsification for 5 minutes to obtain...

Embodiment 2

[0045] The preparation process and material ratio are the same as in Example 1, but the amount of starch is adjusted to 4g.

Embodiment 3

[0047] The preparation process and material ratio are the same as in Example 1, but the amount of starch is adjusted to 0.8g.

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Abstract

The invention discloses a preparation method of a polyacrylamide emulsion. The preparation method comprises the following steps of adding acrylamide, one or more anion monomers, a grafting matrix, an aqueous stabilizer, a molecular weight conditioning agent and an initiator into water, adjusting a pH value to obtain a water phase, adding an emulsifier into a hydrocarbon solvent to obtain an oil phase, dropwisely adding the water phase into the oil phase, carrying out one-step emulsification or multistep emulsification to obtain an emulsion, carrying out displacement deoxygenation on the emulsion by inert gas, and adding the initiator into the emulsion for polymerization initiation to obtain a branched anion polyacrylamide water-in-oil anti-phase emulsion after polymerization is finished. The polyacrylamide emulsion obtained by the preparation method is used for the modern papermaking industry, avoids inorganic filler re-falling after retention, improves inorganic filler actual retention effects, avoids falling-off of dust and lint of a screen cloth, guarantees uniform and stable retention of an inorganic filler in a page, and properly reduces a bentonite use amount.

Description

Technical field [0001] The invention belongs to the technical field of emulsion preparation, and relates to a preparation method of polyacrylamide emulsion, in particular to a preparation method of branched anionic polyacrylamide water-in-oil inverse emulsion. Background technique [0002] The modern paper industry not only requires paper machines to run faster and faster, but also the use of fillers (mainly calcium carbonate) is increasing. At the same time, with the pressure of environmental protection and production costs, most paper mills pay more attention to the use efficiency of wood fibers (especially small fibers). How to effectively retain fillers and fine fibers in the paper sheet has become an important issue in the paper industry. This also puts forward higher requirements on retention and filter aids. [0003] The existing retention and drainage aids used in the papermaking process include three main types: 1) cationic polyacrylamide; 2) inorganic particles (such as...

Claims

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Application Information

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IPC IPC(8): C08F251/00C08F251/02C08F289/00C08F265/10C08F265/04C08F220/56C08F2/32C08F2/30D21H17/34
Inventor 李平周涛魏星光王勤胡望成须勇
Owner JIANGSU FEYMER TECH
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