Sizing agent for paper or paperboard and preparation method of sizing agent

A sizing agent and cardboard technology, which is applied in papermaking, paper coating, water repellent addition, etc., can solve the problems of dampness, slow curing speed, etc., and achieve good film-forming properties, change particle size distribution, and strong film-forming properties Effect

Inactive Publication Date: 2018-06-12
BAOYI NEW MATERIAL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention can effectively improve the sizing effect and reduce the sizing cost. After the sizing agent is compounded with oxidized starch, the paper and cardboard surface can be sizing, which can gr

Method used

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  • Sizing agent for paper or paperboard and preparation method of sizing agent
  • Sizing agent for paper or paperboard and preparation method of sizing agent

Examples

Experimental program
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Effect test

Embodiment 1

[0034] In the reaction device, first pass inert gas helium to drive oxygen, add 10g of dispersant gelatin with a molecular weight of 10000g / mol, 300g of deionized water, heat up to 85°C by steam until the gelatin dissolves, add 300g of deionized water to cool down to 45 ℃. Adding 1g concentration is 20% lauryl polyoxyethylene (15) trimethylammonium chloride aqueous solution as emulsifier, adding 1.5g mass fraction is 15% initiator potassium persulfate aqueous solution, heats to 95 ℃, heat preservation React for 0.5-1h. After the heat preservation is over, add the following mixed monomers dropwise: methyl styrene 85g, hydroxyethyl methacrylate as methacrylate monomer 20g, cationic monomer methacrylic acid acyloxyethyltrimethyl Ammonium chloride 5g, cross-linking monomer N-hydroxyacrylamide 6g, slow dropwise adding buffer agent sodium bicarbonate and neutralizing agent ammonia water to control the pH value of the system, and add them successively within 1 hour. After the dropwi...

Embodiment 2

[0036] In the reaction device, first pass inert gas argon to drive oxygen, add 15g of dispersant gelatin with a molecular weight of 50000g / mol, 300g of deionized water, heat up to 85°C by steam until the gelatin dissolves, add 350g of deionized water to cool down to 45 ℃. Add 0.5g concentration of 20% pentadecyl polyoxyethylene trimethylammonium chloride aqueous solution as an emulsifier, add 1.2g mass fraction of 15% initiator ammonium persulfate aqueous solution, heat to 90°C, heat preservation reaction 0.8 h, after the insulation finishes, drop the following mixed monomers: methyl styrene 95g, ethyl methacrylate as methacrylate monomer 30g, cationic monomer dimethylaminoethyl acrylate monochloromethane quaternary ammonium 6g, The cross-linking monomer is 8 g of methacrylamide, and the buffer agent sodium bicarbonate and the neutralizer ammonia water are slowly added dropwise to control the pH value of the system, and the addition is completed in 1 hour. After the dropwise ...

Embodiment 3

[0038]In the reaction device, first pass inert gas nitrogen to drive oxygen, add 10g of dispersant gelatin with a molecular weight of 100,000g / mol, 300g of deionized water, heat up to 85°C by steam until the gelatin dissolves, add 300g of deionized water to cool down to 45°C . Add 1g of octadecyl polyoxyethylene (15) trimethyl ammonium chloride aqueous solution with a concentration of 20% as an emulsifier, add 1g of an initiator sodium persulfate aqueous solution with a mass fraction of 15%, heat to 85°C, and keep warm for reaction 1h, after the heat preservation is over, add the following mixed monomers dropwise: 90g of methyl styrene, 20g of methyl methacrylate as a methacrylate monomer, 4g of diallyl dimethyl ammonium chloride as a cationic monomer, and The combined monomer is 7g of divinylbenzene, and the buffer agent sodium bicarbonate and neutralizer ammonia water are slowly added dropwise to control the pH value of the system, and the addition is completed in 1 hour. A...

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Abstract

The invention discloses a sizing agent for paper or a paperboard and a preparation method of the sizing agent. The sizing agent is prepared from the following components: (methyl)styrene, (methyl)acrylate monomers, cross-linking monomers, an emulsifier, an initiator, a dispersion agent, a buffering agent, a neutralizing agent, cationic monomers, and deionized water. The raw materials of the surface sizing agent of the invention are environmentally friendly and wide in source, the synthetic process is simple, the reaction process is relatively short, the preparation cost is low, and the prepared sizing agent has appropriate viscosity, good stability and small average particle size, and has high film forming performance; and the sizing agent of the invention is used for sizing the surface ofpaper and has the characteristics of high surface strength, good water resistance and the like. When the sizing agent is compounded by oxide starch, the annular pressure strength of the corrugated paper and the corrugated paperboard can be greatly improved on the premise of not changing the use amount of the sizing agent, and the gram weight of the paperboard can be reduced.

Description

technical field [0001] The invention relates to the technical field of papermaking, in particular to a sizing agent for paper or cardboard and a preparation method thereof. Background technique [0002] In order to save costs, waste paper is currently used instead of wood pulp in papermaking, but the strength of the finished paper is poor and the water absorption value is high. However, the development direction of paperboard is developing from high grammage to low grammage and high strength. Due to the poor internal sizing effect, the paper quality is unstable, and the consumption is large, and the system pollution is difficult to control. Nowadays, manufacturers of container board and corrugated base paper use surface sizing to improve the strength of paper and board has become a popular trend. [0003] Surface sizing is an important process in the process of paper or cardboard processing. It is usually located at the end of the drying section of the paper machine, so tha...

Claims

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Application Information

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IPC IPC(8): D21H21/16D21H19/20D21H19/14C08F212/12C08F220/20C08F220/34C08F220/58C08F220/18C08F220/14C08F220/54C08F212/36
CPCD21H19/14D21H19/20D21H21/16C08F212/12C08F220/18C08F220/34C08F220/54C08F220/1802C08F220/20C08F220/58C08F220/14C08F212/36
Inventor 卞永明钱静丁景敏高玉强李雪佳解越丁海伟王涛
Owner BAOYI NEW MATERIAL CO LTD
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