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Preparation method of water-solubility amylum-acrylamide copolymer and application of water-solubility amylum-acrylamide copolymer

An acrylamide copolymer and acrylamide copolymerization technology are applied in the field of paper production, which can solve the problems of low molecular weight, poor reinforcement effect, loss and the like, and achieve the effects of low cost, strong reinforcement effect, and good economic benefits.

Active Publication Date: 2012-07-25
HANGZHOU HANGHUA HARIMA PAPER CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These patents all mention the method of using starch grafted acrylamide, although it also mentions the use of water-soluble radical polymerization or inverse emulsion polymerization, and step-by-step polymerization methods, etc., but the copolymers synthesized by these methods are generally starch-based. Graft copolymers with a traditional configuration of short acrylamide branches grafted to the skeleton. Due to their low molecular weight and small hydration volume, these copolymers have problems such as poor fixation performance, serious loss, and poor reinforcement effect in papermaking.

Method used

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  • Preparation method of water-solubility amylum-acrylamide copolymer and application of water-solubility amylum-acrylamide copolymer
  • Preparation method of water-solubility amylum-acrylamide copolymer and application of water-solubility amylum-acrylamide copolymer

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Experimental program
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Effect test

Embodiment 1

[0042] Add the primary monomer mixture to a 1000ml four-neck flask equipped with a stirrer, a thermometer, a reflux condenser, a feed port and a nitrogen conduit: 152g of 40% acrylamide aqueous solution, 13.6g of dimethylaminoethyl methacrylate, methacrylic acid Acyloxyethyltrimethylammonium chloride 80% aqueous solution 7.5g, itaconic acid 5.2g, methylenebisacrylamide 1.97g, mercaptoethanol 0.13g, soluble starch 44g, deionized water 260g, and the solid content of the mixture is 27.5 % of the primary monomer mixture, adjust the pH to 2.8 with 50% concentration of sulfuric acid, pass nitrogen into the reaction vessel for more than 30 minutes, and heat it to a temperature of 60°C, then add 10 g of deionized water and The aqueous catalyst solution prepared by catalyst hydrogen peroxide 0.2g initiates the polymerization reaction. The primary linear prepolymer A is obtained by controlling the temperature in a water bath at 60-70° C. for 60 minutes.

[0043] 97.5g of 40% acrylamide...

Embodiment 2

[0045] Add primary monomer mixture to a 1000ml four-neck flask equipped with a stirrer, thermometer, reflux condenser, feed port and argon conduit: 170.4g of 40% acrylamide aqueous solution, 4.5g of dimethylaminoethyl methacrylate, N , N-dimethylaminopropylacrylamide 1.0g, itaconic acid 2.8g, dimethylacrylamide 1.59g, sodium allyl sulfonate 0.46g, corn starch 25g, deionized water 260g, made into solid content It is a 22.4% primary monomer mixture, adjust the pH to 3.5 with 50% sulfuric acid, pass argon into the reaction vessel for more than 30 minutes, and heat it to a temperature of 70°C, then add it to the reaction vessel in one go. The catalyst aqueous solution prepared by ionized water and catalyst ammonium persulfate 0.2g initiates polymerization. The primary linear prepolymer A is obtained by controlling the temperature in a water bath at 80-90° C. for 70 minutes.

[0046] 97.5g of 40% acrylamide aqueous solution, 0.5g of dimethylaminoethyl methacrylate, 0.2g of N,N-dim...

Embodiment 3

[0048] Add a monomer mixture to a 1000ml four-neck flask equipped with a stirrer, a thermometer, a reflux condenser, a feed port and a nitrogen conduit: 62.6g of 40% acrylamide aqueous solution, 0.4g of dimethylaminoethyl methacrylate, and Conic acid 3.1g, dimethylacrylamide 0.32g and sodium methallyl sulfonate 0.2g, cationic starch 18g, deionized water 155.8g, are made into the primary monomer mixture that solid content is 20%, use 40% The concentration of sulfuric acid is adjusted to pH 3.5, nitrogen gas is passed into the reaction vessel for more than 30 minutes, and the temperature is 75°C, and then the reaction vessel is added at one time. Catalyst in water to initiate polymerization. The primary linear prepolymer A is obtained by controlling the temperature in a water bath at 80-90° C. for 70 minutes.

[0049] 40% acrylamide aqueous solution 161.4g, methacrylamide 16.3g, dimethylaminoethyl methacrylate 3.4g, itaconic acid 7.3g, fumaric acid 2.8g, dimethylacrylamide 0.95...

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Abstract

The invention relates to the field of papermaking production, aims at solving the problem that the current papermaking industry needs a comprehensive dry strength resin concurrently having super enhanced effect of polyacrylamide and low cost feature of amylum, and provides a preparation method of a water-solubility amylum-acrylamide copolymer and application of the water-solubility amylum-acrylamide copolymer. The water-solubility amylum-acrylamide copolymer is prepared by the following components in parts by weight: 25-90 parts of monomer A, 0-20 parts of monomer B, 0-20 parts of monomer C, 0.02-1.5 parts of molecular weight control agents, 0.005-3.5 parts of crosslinking monomers, 5-30 parts of the amylum, 0.1-1 parts of catalyst and 0.2-2 parts of terminating agents, wherein water is added until product solid content is adjusted to be 10%-30%. The water-solubility amylum-acrylamide copolymer is used as the dry strength resin, and has strong enhanced effect, lower cost than the currently ordinary polyacrylamides dry strength resin and better economic benefit.

Description

technical field [0001] The invention relates to the field of paper production, in particular to a stable preparation method of a branched chain water-soluble starch graft copolymer and its application. technical background [0002] In the field of papermaking, the most common reinforcing agents include natural polymers, such as starch, guar gum, cellulose, etc., and synthetic polymers, such as polyvinyl alcohol, polyacrylamide, polyethyleneimine, etc. Starch is due to its The advantages of extensive resources and cheap prices have long been used as the main enhancer for paper copying. In recent years, as a countermeasure for energy saving, emission reduction and environmental protection, papermaking enterprises have gradually promoted clean papermaking, resulting in a closed cycle of white water and serious accumulation of garbage and impurities in the system. Strengthening effect, so in recent years, the polymer polymerization enhancer mainly represented by amphoteric poly...

Claims

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Application Information

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IPC IPC(8): C08F251/00C08F220/56C08F220/34C08F220/60C08F2/38D21H21/18D21H17/37
Inventor 吕建平岩佐良明福田敦之李相汪曾祁
Owner HANGZHOU HANGHUA HARIMA PAPER CHEM
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