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Quaternary ammonium type paper making additive and method for preparing same

A paper-making auxiliary, quaternary ammonium-type technology, applied in the field of polymer chemical auxiliary preparation, can solve the problems of paper-making performance decline, high use cost, difficult to waste fiber reinforcement and retention, etc., to achieve increased polymerization rate, Fast reaction speed, avoiding the effect of easy cross-linking of products

Inactive Publication Date: 2012-11-14
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional papermaking additives include polyacrylamide, starch, chitosan, emulsion polymer, guar gum, CMC, polyvinyl alcohol (PVA) and cationic urea-formaldehyde resin (UF), cationic melamine-formaldehyde resin (MF), polyethyleneimine (PEI), etc., it is difficult to achieve reinforcement and retention of waste fibers, and the cost of use is high
Therefore, it is of great significance to synthesize a papermaking additive suitable for papermaking waste fibers, and to solve the problem of paper performance degradation caused by the recycling of fine fibers, which is of great significance for the resource utilization of waste fibers.

Method used

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  • Quaternary ammonium type paper making additive and method for preparing same
  • Quaternary ammonium type paper making additive and method for preparing same
  • Quaternary ammonium type paper making additive and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Add 32.5g of Span80, 21.5g of Tween60 and 150g of cyclohexane into the reaction flask equipped with a stirrer, reflux condenser, nitrogen pipe and thermometer, place in a constant temperature water bath at 30°C, stir and emulsify for 30min to obtain oily phase. In a beaker, DMC, AM and AA three kinds of monomers are configured into 100g aqueous solution according to the molar ratio of DMC:AM:AA=1.5:7:1.5, the mass concentration is 50%, and the pH is adjusted to 5, and then added to the above solution Add 0.2 g of sodium bisulfite to obtain a mixed solution of ternary monomers. Then slowly and evenly drop the above-mentioned ternary monomer mixed solution into the oil phase of the reaction bottle, and control the rate so that the dropwise addition is completed within 10 minutes. About 10 minutes after the ternary monomer mixed solution was added dropwise, 10ml of the oxidant solution (containing 0.4g ammonium persulfate) was added dropwise at a constant speed, and nitro...

Embodiment 2

[0038] Add 21.5g of Span80, 21.5g of Tween60 and 175g of cyclohexane into a reaction flask equipped with a stirrer, reflux condenser, nitrogen pipe and thermometer, place in a constant temperature water bath at 40°C, stir and emulsify for 35min to obtain oily phase. In a beaker, DMC, AM and AA three monomers are prepared according to the molar ratio of DMC: AM: AA = 1.5: 7: 1.5 to form 100g aqueous solution with a mass concentration of 40%, and adjust the pH to 6, and then add to the above solution Add 0.3 g of sodium bisulfite to obtain a mixed solution of ternary monomers. Then slowly and evenly drop the above-mentioned ternary monomer mixed solution into the oil phase of the reaction bottle, and control the rate so that the dropwise addition is completed within 15 minutes. About 10 minutes after the ternary monomer mixed solution was added dropwise, 10ml of the oxidant solution (containing 0.6g of ammonium persulfate) was added dropwise at a constant speed, and nitrogen ga...

Embodiment 3

[0044] Add 19.5g of Span80, 34.5g of Tween60 and 200g of cyclohexane into a reaction flask equipped with a stirrer, reflux condenser, nitrogen pipe and thermometer, place in a constant temperature water bath at 50°C, stir and emulsify for 40min to obtain oily phase. In a beaker, DMC, AM and AA three kinds of monomers are configured into 100g aqueous solution according to the molar ratio of DMC:AM:AA=1.5:7:1.5, the mass concentration is 30%, and the pH is adjusted to 7, and then added to the above solution Add 0.4 g of sodium bisulfite to obtain a mixed solution of ternary monomers. Then slowly and evenly drop the above-mentioned ternary monomer mixed solution into the oil phase of the reaction bottle, and control the rate so that the dropwise addition is completed within 20 minutes. About 15 minutes after the ternary monomer mixed solution was added dropwise, 10ml of the oxidant solution (containing 0.8g of ammonium persulfate) was added dropwise at a constant speed, and nitr...

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Abstract

The invention discloses a method for preparing a quaternary ammonium type paper making additive. The method includes mixing a composite emulsifying agent composed of Span 80 and Tween 60 with cyclohexane, stirring and emulsifying the mixture to obtain an oil phase, mixing di Methyl carbondined on (DMC), acrylic amid (AM) and acrylic acid (AA) to prepare a three element monomer water solution, mixing the solution with sodium bisulfate evenly, dropwise adding the solution evenly into the oil phase, mixing the mixture after the solution is dropwise added for 10 to 15 minutes, starting dropwise adding an ammonium persulfate solution, and feeding N2; after reaction materials are all added, controlling the material temperature to be in a range of 30 DEG C to 50 DEG C, stirring continuously for 3 to 5 hours, stopping feeding the N2, and adding a polymerization inhibitor to a reaction system to stop the reaction on hydroquinone; and obtaining polymer precipitation by washing reaction resultants, and drying the precipitation to obtain the quaternary ammonium type paper making additive. The method for preparing the quaternary ammonium type paper making additive has the advantages that the reaction speed is rapid, the solid content is high, the particle diameter is small and uniform, and latex products are stable and suitable for long lime storage.

Description

technical field [0001] The invention belongs to the technical field of preparation of polymer chemical auxiliary agents, and in particular relates to a synthesis method of a quaternary ammonium salt-type paper-making auxiliary agent suitable for recycling papermaking waste fibers. Background technique [0002] A large amount of waste fiber recycling can help to alleviate the contradiction between the shortage of papermaking raw materials and energy shortage in my country. However, with the increase in the number of recycled waste paper fibers, the swelling ability of waste paper fibers decreases, and the fibers become stiff. The plasticity is obviously reduced, and the fibers become finer and absorb a large amount of anionic impurities, resulting in low retention rate of fine components in the paper material, and low strength and stiffness of the paper sheet. And the papermaking waste slag formed by the fine fibers lost in a large amount causes serious pollution to the enviro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F220/06C08F220/34C08F2/32C08F4/40D21H21/06
Inventor 马邕文唐黎王艳万金泉黄明智
Owner SOUTH CHINA UNIV OF TECH
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