Preparation method for amphoteric water-in-oil inverse emulsion

A technology of inverse emulsion and water-in-oil, which is applied in the field of preparation of amphoteric water-in-oil inverse emulsion, can solve the problems of affecting the normal production of paper, reducing the dewatering speed of paper machines, increasing energy consumption, etc. Transport, high molecular weight effect

Active Publication Date: 2014-05-14
JIANGSU FEYMER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Starch and its modified products have certain advantages in terms of source and price, but generally speaking, the amount of starch and its modified products is relatively large, and the strengthening effect obtained is not good, and this type of dry strength agent will reduce the dehydration speed of the paper machine and affect the normal production of paper. , increasing energy consumption during drying

Method used

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  • Preparation method for amphoteric water-in-oil inverse emulsion
  • Preparation method for amphoteric water-in-oil inverse emulsion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Add acrylamide, maleic acid, acryloyloxyethyltrimethylammonium chloride, ethylenediaminetetraacetic acid sodium salt, and mercaptan into water, adjust the pH to 5.0, and prepare the aqueous phase A, in which acryloyl The mass ratio of oxyethyltrimethylammonium chloride and maleic acid is 9:1;

[0031] Add acrylamide, maleic acid, acryloyloxyethyltrimethylammonium chloride, ethylenediaminetetraacetic acid sodium salt, and mercaptan into water, adjust the pH to 10.0, and prepare the aqueous phase B, in which acryloyloxyethyl The mass ratio of trimethylammonium chloride and maleic acid is 1:9, and the mass ratio of aqueous phase A and aqueous phase B is 4:6;

[0032] (2) Add fatty acid polyoxyethylene ester into cyclohexane solvent to form an oil phase; divide the oil phase into two parts, drop water phase A and B into the oil phase respectively, and obtain two emulsions A and emulsion through one-step emulsification B;

[0033] (3) Replace emulsion A and emulsion B ...

Embodiment 2

[0036](1) Add methacrylamide, 2-acrylamido-2-methylpropanesulfonic acid, methacrylamidopropyltrimethylammonium chloride, diethylenetriaminepentaacetic acid sodium salt, sodium formate into water, Adjust PH=6.0, configure to obtain aqueous phase A, wherein the mass ratio of methacrylamidopropyltrimethylammonium chloride to 2-acrylamido-2-methylpropanesulfonic acid is 4:1;

[0037] Add methacrylamide, 2-acrylamido-2-methylpropanesulfonic acid, methacrylamidopropyltrimethylammonium chloride, diethylenetriaminepentaacetic acid sodium salt, and sodium formate into water to adjust the pH= 8.0, configured to obtain water phase B, wherein the mass ratio of methacrylamidopropyltrimethylammonium chloride to 2-acrylamido-2-methylpropanesulfonic acid is 1:6; water phase A and water phase The mass ratio of B is 3:7

[0038] (2) Add sorbitan fatty acid ester and polyoxyethylene sorbitan fatty acid ester (8:1 by weight) to 7# white oil to form an oil phase; divide the oil phase into two par...

Embodiment 3

[0042] (1) Add hydroxyethyl acrylate, acrylic acid, methacryloyloxyethyltrimethylammonium chloride, diethylenetriaminepentaacetic acid pentasodium salt, and sodium formate into water, adjust the pH to 7.0, and prepare the water phase, press The mass ratio of cationic monomers and anionic monomers in water is 5:1 to obtain aqueous phase A; the mass ratio of cationic monomers to anionic monomers is 1:4 to obtain aqueous phase B; the mass of aqueous phase A and aqueous phase B The ratio is 7:3

[0043] (2) Add alkylphenol polyoxyethylene ether to toluene to form an oil phase; divide the oil phase into two parts, drop water phase A and B into the oil phase respectively, and obtain two kinds of emulsion A and emulsion through one-step emulsification B;

[0044] (3) Replace emulsion A and emulsion B with an inert gas to remove oxygen, adjust the temperature of emulsion B to the initiation temperature, add azobisisobutyronitrile, and after 45 minutes of polymerization, start to add ...

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Abstract

The invention discloses a preparation method for amphoteric water-in-oil inverse emulsion. The preparation method comprises the following steps: respectively adding a non-ion monomer, an anion monomer, a cation monomer, a water quality stabilizer and a molecular weight modifier into water; adjusting PH (Potential of Hydrogen) to obtain a water phase A and a water phase B with different ratios; adding a non-ion emulsifying agent into a hydrocarbons solvent to prepare an oil phase; dividing the oil phase into two parts; respectively dropwise adding the water phase A and the water phase B into the two parts of the oil phase; carrying out one-step emulsification or multi-step emulsification to obtain emulsion A and emulsion B; displacing the emulsion A and the emulsion B by using insert gas to remove oxygen; adjusting the temperature of the emulsion B to an initiation temperature; adding an initiator and after polymerization is carried out for 30-120 minutes, dropwise adding the emulsion A; continually reacting to convert all the monomers into polymers; and finishing the reaction to obtain an amphoteric water-in-oil inverse emulsion product. Amphoteric polyacrylamide prepared by the preparation method has different molecular structures, also has the advantages of high effective content, high molecular weight, low viscosity and can be dissolved quickly.

Description

Technical field: [0001] The present invention relates to a preparation method of a copolymer, in particular to a preparation method of an amphoteric water-in-oil inverse emulsion Background technique: [0002] In the papermaking process, some additives are often added to improve the strength performance index of paper, and dry strength agent is one of the important additives used in a large amount. Dry strength agent is used to provide tensile strength, tear strength, breaking stress, folding resistance and stiffness of paper in dry state. Its main function is to enhance the internal bonding force between fibers, many water-soluble, and fiber All polymers capable of forming hydrogen bonds can be used as dry strength agents. There are two types of paper dry strength agents: natural polymers and their modified products and synthetic polymers, among which natural polymers are mainly starch and its modified products. Starch and its modified products have certain advantages in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F291/12C08F220/56C08F222/02C08F220/34C08F220/58C08F220/60C08F220/28C08F212/14C08F226/02C08F228/02C08F2/32C08F2/38
Inventor 魏星光周涛王勤须勇胡望成李平
Owner JIANGSU FEYMER TECH
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