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AKD (Alkyl Ketene Dimer) reinforcement accelerator for surface glue and preparation method thereof

A technology of accelerator and surface glue, applied in the field of AKD enhancement accelerator for surface glue and its preparation, can solve the problems of easy hydrolysis and deterioration, poor starch temperature adaptability, poor emulsion stability, etc., to improve paper quality and surface printing strength. , Reduce the effect of wet end paper break

Inactive Publication Date: 2017-05-10
SHANDONG YUANGEN CHEM TECH RES & DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the storage of AKD, ketone compounds will be generated due to the hydrolysis reaction. The hydrolyzed AKD is ineffective for sizing. Modified starch is widely used as a stabilizer for AKD protective colloids. Poor stability

Method used

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  • AKD (Alkyl Ketene Dimer) reinforcement accelerator for surface glue and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 40 parts of dimethyl diallyl ammonium chloride, 40 parts of acrylic acid for use as an unsaturated organic acid, 10 parts of functional monomers, 2 parts of polyvinyl alcohol with a degree of alcoholysis of 99% and a viscosity of 19 cps, 0.01 part of ammonium persulfate, water 300 parts; Add 80 parts of water to polyvinyl alcohol and stir at room temperature for 1 hour, raise the temperature to 93°C, stir continuously during the heating process, when the temperature reaches 93°C, keep warm for 1 hour to obtain a polyvinyl alcohol solution with a solid content of 5%; in the reaction Add 220 parts of water, 20 parts of dimethyl diallyl ammonium chloride, 40 parts of acrylic acid, and 0.003 parts of ammonium persulfate into the kettle, and stir evenly, then heat up, and keep warm at 50°C for 1 hour; Add 20 parts of dimethyl diallyl ammonium chloride, 10 parts of functional monomers, and 0.002 parts of ammonium persulfate, stir at 50°C, keep warm at 55°C for 2 hours; add pol...

Embodiment 2

[0035] 45 parts of dimethyl diallyl ammonium chloride, 40 parts of methacrylic acid for unsaturated organic acid, 10 parts of functional monomer, 5 parts of polyvinyl alcohol with a degree of alcoholysis of 99.5% and a viscosity of 25 cps, and 0.02 part of ammonium persulfate , 300 parts of water; add 150 parts of water to polyvinyl alcohol and stir at room temperature for 1 hour, heat up to 93°C, stir continuously during the heating process, when the temperature reaches 93°C, keep warm for 1 hour to obtain a polyvinyl alcohol solution with a solid content of 5%; Add 150 parts of water, 20 parts of dimethyl diallyl ammonium chloride, 40 parts of methacrylic acid, and 0.008 parts of ammonium persulfate into the reaction kettle, and stir evenly, then raise the temperature, and keep warm at 55°C for 1 hour; Add 25 parts of dimethyl diallyl ammonium chloride, 10 parts of functional monomers, and 0.004 parts of ammonium persulfate into the reaction kettle, stir at 55°C, and keep war...

Embodiment 3

[0037] 50 parts of dimethyl diallyl ammonium chloride, 50 parts of crotonic acid for unsaturated organic acid, 10 parts of functional monomer, 10 parts of polyvinyl alcohol with alcoholysis degree of 99.8%, viscosity of 27 cps, 0.03 part of ammonium persulfate , 300 parts of water; add 180 parts of water to polyvinyl alcohol and stir at room temperature for 1 hour, heat up to 97°C, stir continuously during the heating process, when the temperature reaches 97°C, keep warm for 1 hour to obtain a polyvinyl alcohol solution with a solid content of 5%; Add 120 parts of water, 30 parts of dimethyl diallyl ammonium chloride, 50 parts of crotonic acid, and 0.01 part of ammonium persulfate into the reaction kettle, and stir evenly, then heat up, and keep warm at 40°C for 1 hour; Add 20 parts of dimethyl diallyl ammonium chloride, 10 parts of functional monomers, and 0.01 part of ammonium persulfate into the reaction kettle, stir at 40°C, and keep warm at 60°C for 2 hours; Add polyvinyl...

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Abstract

The invention belongs to the field of papermaking additives, and particularly relates to an AKD (Alkyl Ketene Dimer) reinforcement accelerator for surface glue and a preparation method thereof. The AKD reinforcement accelerator is prepared from 40 to 50 parts of dimethyl diallyl ammonium chloride, 40 to 50 parts of unsaturated organic acid, 10 parts of functional monomers, 2 to 10 parts of polyvinyl alcohol, 0.01 to 0.03 part of initiator and 300 parts of water. The AKD reinforcement accelerator disclosed by the invention can be combined with AKD, so that the lagging maturation period of gluing is shortened, distribution coverage of the AKD on the surface of fiber is promoted, a gluing function is fully expressed by the AKD, formation of a fiber cross-linked network can be promoted, and not only is the gluing effect improved, but also the strength of paper can be increased.

Description

technical field [0001] The invention belongs to the field of papermaking auxiliary agents, in particular to an AKD strengthening accelerator for surface glue and a preparation method thereof. Background technique [0002] AKD is a sizing agent commonly used at present, and it can be used as both an internal sizing agent and a surface sizing agent. AKD is a fiber-reactive synthetic sizing agent. Under medium and alkaline conditions, the reactive functional groups can react with the hydroxyl groups on the cellulose to form a covalent bond and fix on the fiber, forming a stable layer on the surface of the fiber. The film changes the fibers from hydrophilic to hydrophobic, thus making the paper sheet water-resistant. [0003] However, the reaction between AKD and cellulose hydroxyl is a relatively slow process, so the AKD ripening period is longer. When AKD is used as a surface sizing agent, starch is generally used as a carrier, but a larger amount of AKD is required and the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F226/02C08F220/06C08F220/04C08F220/34C08F220/56C08F220/58D21H19/20D21H21/16
CPCC08F226/02C08F220/04C08F220/06D21H19/20D21H21/16C08F220/34C08F220/56C08F220/58
Inventor 仲亚杰荆蒙蒙张聪孙雨思
Owner SHANDONG YUANGEN CHEM TECH RES & DEV CO LTD
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