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Enhanced multifunctional surface sizing assistant for papermaking and preparation method thereof

An enhanced, multi-functional technology, applied in papermaking, textiles, papermaking, paper coatings, etc., can solve rare problems and achieve the effects of improving ring compressive strength, good reinforcement performance, and good water resistance

Inactive Publication Date: 2015-10-21
浙江弘利新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In actual production, although there are many products with good water resistance and fast curing speed, there are not many products with improved ring compressive strength, folding resistance and other indicators, and urgently need to be developed

Method used

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  • Enhanced multifunctional surface sizing assistant for papermaking and preparation method thereof
  • Enhanced multifunctional surface sizing assistant for papermaking and preparation method thereof
  • Enhanced multifunctional surface sizing assistant for papermaking and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Taking 1000g as an example, the main raw materials and proportions are as follows:

[0028] Monomer mixture A: styrene 180g, acrylonitrile 25g, butyl acrylate 20g, methyl methacrylate 15g, divinylbenzene 0.3g;

[0029] Monomer mixture B: 70g of acrylamide, 15g of dimethylaminoethyl methacrylate, 7g of acrylic acid, and 50g of water;

[0030] Concrete preparation steps are as follows:

[0031] (1), prepare a four-necked flask with condenser, dropping device, stirrer and thermometer, mix starch 60g, glyoxal 5g (mixed with 40wt% aqueous solution) and water 450g, heat up to 85°C, keep warm For 30 minutes, the viscosity of the control system is not higher than 10mPa·s.

[0032] (2), add 0.12g of ferrous sulfate (dissolved in 10g of water), 3g of glacial acetic acid and 15g of 27wt% hydrogen peroxide in the four-neck flask. Among them, ferrous sulfate and hydrogen peroxide constitute the initiator, and glacial acetic acid is used as the pH regulator of the system.

[0033...

Embodiment 2

[0037] Taking 1000g as an example, the main raw materials and proportions are as follows:

[0038] Monomer mixture A: styrene 140g, ethyl acrylate 25g, tert-butyl acrylate 15g, vinyltriisopropoxysilane 5g, acrylic acid 7g;

[0039] Monomer mixture B: 60g of acrylamide, 1g of diallylamine, 100g of water;

[0040] Monomer mixture C: 10 g of acryloyloxyethyl dimethyl benzyl ammonium chloride (78 wt % aqueous solution), 10 g of water.

[0041] Concrete preparation steps are as follows:

[0042] (1), prepare a four-necked flask with a condenser, a dropping device, a stirrer and a thermometer, mix 90g of starch, 0.05g of α-amylase, 10g of glyoxal (prepared as a 40wt% aqueous solution) and 450g of water , raise the temperature to 93-95°C, keep it warm for 15 minutes, and control the viscosity of the system not to be higher than 15mPa·s.

[0043] (2) Add 3 g of glacial acetic acid and 8 g of 27 wt % hydrogen peroxide into the four-necked flask.

[0044] (3) Keeping the temperature...

Embodiment 3

[0048] Taking 1000g as an example, the main raw materials and proportions are as follows:

[0049] Monomer mixture A: styrene 150g, methyl methacrylate 15g, isooctyl acrylate 15g, acrylonitrile 25g, diethylaminoethyl acrylate 5, acrylic acid 7g;

[0050] Concrete preparation steps are as follows:

[0051](1), prepare a four-necked flask with condenser, dropping device, stirrer and thermometer, mix starch 110g, ammonium persulfate 2g, glyoxal 5g (being mixed with 40wt% aqueous solution) and water 550g, heat up To 88 ℃, keep warm for 60 minutes, control the viscosity of the system not higher than 20mPa·s.

[0052] (2), keep the temperature at 90-93°C, dropwise add monomer mixture A and ammonium persulfate 3g (dissolved in 100g water) at the same time, wherein the dropping time of ammonium persulfate is controlled at 4.5 hours, the monomer mixture A Dropping time was controlled at 4 hours.

[0053] (4) After completion of the dropwise addition, keep warm at 84-86° C. and react...

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Abstract

The invention discloses a production formula of an enhanced multifunctional surface sizing assistant for papermaking and a preparation process. Specifically, the production formula involves: 5-15 parts of starch, 15-25 parts of a hydrophobic monomer, 2-15 parts of a hydrophilic monomer, 0-0.5 part of a crosslinking monomer, 0.1-5 parts of an initiator, 0.2-2 parts of glyoxal, 0-5 parts of a pH regulator, and the balance water. The sizing assistant prepared by the preparation process provided by the invention can enhance the strength indexes of paper and paper boards (like enhancing ring crush strength, bursting strength, folding endurance, moisture resistance and the like), also can endow paper and paper boards with good water resistance, meet the multipurpose sizing demands of paper and paper boards, and have good market prospects.

Description

technical field [0001] The invention relates to an enhanced multifunctional surface sizing aid for papermaking and a preparation method thereof, belonging to the technical field of papermaking chemicals. Background technique [0002] Surface sizing of paper and cardboard is a relatively common process and technology in the current paper industry, which can improve the surface properties of paper, such as: improving the water resistance and smoothness of the paper surface, reducing lint and powder during printing, etc. Phenomenon. Currently on the market, there are many types of surface sizing agents, such as AKD emulsions, polyurethane dispersions (PUD for short), styrene-maleic anhydride polymer aqueous solution (Styrene maleic anhydride, SMA for short), benzene Ethylene-acrylic acid polymer aqueous solution (styrene acrylic acids, referred to as SAA) and styrene-acrylate copolymer aqueous dispersion (Styrene acrylic emulsions, referred to as SAE type), etc. Among them, s...

Claims

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Application Information

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IPC IPC(8): D21H21/16D21H19/12
Inventor 张庆辉方仕江王月
Owner 浙江弘利新材料有限公司
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