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An emulsifier for alkenyl succinic anhydride

A technology of alkenyl succinic anhydride and emulsifier, applied in the direction of water repellent addition, etc., can solve the problems of low stability of ASA emulsion, wide average particle size distribution of emulsion, and reduced runnability of paper machines, etc., to achieve increased flexibility, Tight wrapping, reducing hydrolysis effect

Active Publication Date: 2020-03-17
JIANGSU FEYMER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Patent No. is in the patent of CN100363555C, CN1242118C, CN100415991C, CN104781471A, has described that ASA emulsion and emulsifier are used for the sizing of paper or cardboard, although these sizing emulsions have been used in the papermaking industry partly, but there is the ASA emulsion Inadequacies such as low stability, wide average particle size distribution of emulsion, and low proportion below 2um
[0004] Documentation (Bi Songlin. Papermaking chemicals and their application [M]. Beijing: China Textile Press, 2007: 232-244.) introduces that ASA is easily hydrolyzed with water to generate dicarboxylic acid, which makes its application effect change. Poor; in addition, if the ASA hydrolyzate forms sticky matter in the equipment system, it will cause paper degradation, and in severe cases, it will cause paper breakage and reduce the runnability of the paper machine

Method used

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  • An emulsifier for alkenyl succinic anhydride
  • An emulsifier for alkenyl succinic anhydride
  • An emulsifier for alkenyl succinic anhydride

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] Add 220 parts of deionized water, 20 parts of tetradecyl dimethyl allyl ammonium chloride (65%), 150 parts of dimethyl Diallyl ammonium chloride (60%), 0.03 part of ethylenediaminetetraacetic acid disodium salt, 0.02 part of sodium hypophosphite, adjust the speed to 300 rpm, stir to fully dissolve, and adjust the pH to 3-4, blow nitrogen for 30 minutes to remove oxygen, adjust the system temperature to the initiation temperature, add 2 parts of 1% VA044 aqueous solution to initiate the reaction, add 1 part of 1% potassium persulfate aqueous solution after 1-4 hours and continue the reaction After 1-3 hours, cool down and adjust the pH to 4.0 to obtain an emulsifier.

Embodiment 2

[0075] Add 220 parts of deionized water, 20 parts of cetyl dimethyl allyl ammonium chloride (65%), 150 parts of methyl Acryloyloxyethyltrimethylammonium chloride (60%), 0.05 parts of diethylenetriaminepentaacetic acid sodium salt, 0.5 parts of isopropanol, adjust the speed to 300 rpm, stir to fully dissolve, adjust with acetic acid pH to 3-4, blow nitrogen for 30 minutes to remove oxygen, adjust the system temperature to the initiation temperature, add 2 parts of 1% azobisisobutyronitrile solution to initiate the reaction, add 1 part of sodium persulfate aqueous solution again after 1.5 hours and Continue to react for 1-3 hours, lower the temperature, and adjust the pH to 4.0 to obtain the emulsifier.

Embodiment 3

[0077] Add 220 parts of deionized water, 20 parts of octadecyl dimethyl allyl ammonium chloride (65%), 150 parts of methyl Acryloyloxyethyl dimethyl sulfate dimethyl sulfate (60%), 0.03 part of ethylenediaminetetraacetic acid disodium salt, 0.05 part of allyl sodium sulfonate, adjust the speed to 300 rpm, stir to make it fully Dissolve, adjust the pH to 3-4 with dilute hydrochloric acid, pass nitrogen gas for 30 minutes to remove oxygen, adjust the temperature of the system to the initiation temperature, add 2 parts of 1% ammonium persulfate, and add aqueous sodium bisulfite solution dropwise to initiate the reaction, Then add 1 part of V50 aqueous solution again after 4 hours of heat preservation and continue to react for 1-3 hours, lower the temperature and adjust the pH to 4.0 to obtain the emulsifier.

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Abstract

The invention discloses an emulsifier for ASA (alkenyl succinic anhydride). The emulsifier is formed through copolymerization of a main functional monomer in a water solution containing a chelating agent, a pH regulator and a chain transfer agent under the initiating of an initiator; the main functional monomer comprises long-chain alkyl allyl ammonium chloride and a short-chain alkenyl cationic monomer. A long-chain alkyl structure is introduced to macromolecules of the emulsifier, in the ASA emulsification process by the emulsifier, the thickness of a micelle layer of macromolecular colloidal particles of the emulsifier increases, so that water molecules outside the micelle have difficulty in entering a colloidal nucleus, and hydrolysis of ASA is reduced; compared with Poly-DMDAAC, the emulsifier has increased structure flexibility and wraps the colloidal particles more tightly, an emulsified liquid has smaller particle size and is distributed more uniformly, the particles of the emulsified liquid are more stable, and the emulsifier is more firmly bonded with ASA; compared with Poly-DMDAAC homopolymers, the emulsifier has the cationic structure more easily bonded with carboxyl with negative charges on fiber and has enhanced reactivity with paper sheets, after ASA is bonded with the paper sheets, long hydrophobic chains in the emulsifier and hydrophobic chain on ASA extend outof the paper sheets together, and the water resistance of the paper sheets is improved.

Description

technical field [0001] The invention relates to the technical field of water-soluble polymers, in particular to an emulsifier for alkenyl succinic anhydride. Background technique [0002] Alkenyl succinic anhydride, referred to as ASA, is one of the reactive neutral sizing agents commonly used in the paper industry. Sizing is a very important process in the paper industry, and paper can be endowed with good water resistance through sizing. At present, ASA is mainly used for gypsum face paper and cardboard that require high water resistance. ASA has the advantages of high sizing strength and strong penetration resistance. Both ASA and emulsifiers have a very significant impact on the emulsification effect and paper sizing effect. [0003] Patent No. is in the patent of CN100363555C, CN1242118C, CN100415991C, CN104781471A, has described that ASA emulsion and emulsifier are used for the sizing of paper or cardboard, although these sizing emulsions have been used in the paper...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F226/02C08F220/34C08F220/38C08F228/02D21H21/16
CPCC08F220/34C08F220/38C08F220/382C08F226/02D21H21/16C08F228/02
Inventor 王勤史亚鹏魏星光何国锋卫巧磊陈炀郭志宇
Owner JIANGSU FEYMER TECH