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Preparation method of polyacrylamide emulsion

A technology of polyacrylamide and acrylamide, which is applied in the direction of paper, textiles and papermaking, and non-fibrous pulp addition, etc. It can solve the problems of difficult dehydration, difficult to achieve retention and filter effects, and network blockage in the wire part of the paper machine.

Active Publication Date: 2015-06-24
JIANGSU FEYMER TECH
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  • Summary
  • 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] 126g of acrylamide, 118g of acrylic acid, 8g of starch, 0.16g of disodium edetate, 0.017g of urea, 0.03g of ammonium persulfate and 150g of deionized water were placed in a beaker. Stir to completely dissolve all the materials, slowly add 160g of 40Wt.% sodium hydroxide solution, and continue to add 40Wt.% sodium hydroxide dropwise until the system pH=7.0 and configure the water phase for later use. In a four-necked flask (the four-necked flask is equipped with a stirring paddle, a thermometer, and a nitrogen inlet and outlet), 28.7g of sorbitan glyceride (referred to as Span 80) and 3.3g of sorbitan monostearate polyoxyethylene ether (referred to as Tween 60) Add 208g of 5# white mineral oil, stir to dissolve completely. Under the condition of stirring, add the water phase to the oil phase drop by drop, continue to stir and emulsify for 30 minutes after the dropwise addition, and then use a homogenizer to emulsify for 5 minutes to obtain a stable emulsion. After deoxy...

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 the paper machine to run faster and faster, but also uses more and more fillers (mainly calcium carbonate). 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 fine fibers). How to effectively retain fillers and fine fibers in paper sheets has become an important issue in the paper industry. This also puts forward higher requirements for retention and drainage aids. [0003] The retention and drainage aids used in the existing papermaking process include three main types: 1) cationic polyacrylamide; 2) inorganic particles (such...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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