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A kind of papermaking strengthening agent and its preparation method and application

A technology of a papermaking reinforcing agent and a swelling inhibitor, which is applied in the field of papermaking reinforcing agent and its preparation, can solve the problems that the product type and quality cannot fully meet the market demand, etc., and achieve the effects of good transparency of paste liquid, cost reduction and good enhancement effect.

Active Publication Date: 2015-08-26
广东麦可瑞化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, the types and quality of domestic products cannot fully meet the market demand.
At present, there is no report on the method of preparing paper-making strengthening agent with glutinous rice starch as raw material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Mixing: Mix 50g of glutinous rice starch with 125ml of distilled water and 7.5g of sodium chloride to form a starch suspension.

[0027] (2) Alkalinization: 50ml of 3% sodium hydroxide solution was added dropwise to the starch suspension in step (1), and alkalized at 30°C for 15 minutes.

[0028] (3) Etherification: Slowly add 70ml of 3% by mass 2,3-epoxypropyltrimethylammonium chloride solution dropwise to the alkalized starch suspension in step (2), the adding time After 30 minutes, the temperature was raised to 85°C for 105 minutes.

[0029] (4) Neutralization, suction filtration, washing, and drying: Add dropwise 10% acetic acid by volume to the starch suspension after etherification in step (3) to neutralize to pH=6.5-7.0, and vacuum suction , washed 5 times with 60% ethanol aqueous solution by volume fraction, placed the obtained solid in a vacuum drying oven at 40°C, dried, and pulverized to obtain a papermaking strengthening agent.

[0030] Prepare the pap...

Embodiment 2

[0033] (1) Mixing: Mix 50g of glutinous rice starch with 125ml of distilled water and 7.5g of sodium chloride to form a starch suspension.

[0034] (2) Alkalinization: 50ml of 5% sodium hydroxide solution was added dropwise to the starch suspension in step (1), and alkalized at 30°C for 20 minutes.

[0035] (3) Etherification: Slowly add 75ml of 3% by mass 2,3-epoxypropyltrimethylammonium chloride solution dropwise to the alkalized starch suspension in step (2), and the dropping time After 35 minutes, the temperature was raised to 87°C for 120 minutes.

[0036] (4) Neutralization, suction filtration, washing, and drying: Add dropwise 10% acetic acid by volume to the starch suspension after etherification in step (3) to neutralize to pH=6.5-7.0, and vacuum suction , washed 5 times with 70% ethanol aqueous solution by volume fraction, placed the obtained solid in a vacuum drying oven at 45°C, dried, and pulverized to obtain a paper-making strengthening agent.

[0037] Prepare ...

Embodiment 3

[0040] (1) Mixing: Mix 100g of glutinous rice starch with 250ml of distilled water and 15g of sodium chloride to form a starch suspension.

[0041] (2) Alkalinization: 100ml of 3% calcium hydroxide solution was added dropwise to the starch suspension in step (1), and alkalized at 30°C for 25 minutes.

[0042] (3) Etherification: Slowly add 160ml of 3% 2,3-epoxypropyltrimethylammonium chloride solution by mass to the alkalized starch suspension in step (2), and the addition time After 40 minutes, the temperature was raised to 90°C for 115 minutes.

[0043] (4) Neutralization, suction filtration, washing, and drying: Add dropwise 10% acetic acid by volume to the starch suspension after etherification in step (3) to neutralize to pH=6.5-7.0, and vacuum suction , washed 5 times with 75% ethanol aqueous solution by volume fraction, placed the obtained solid in a vacuum drying oven at 50°C, dried, and pulverized to obtain a paper-making strengthening agent.

[0044] Prepare the pa...

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PUM

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Abstract

The invention belongs to the technical field of production of modified starch, and particularly relates to a paper strengthening agent, and a preparation method and application thereof. The preparation method of the paper strengthening agent comprises the following steps: mixing waxy rice starch, distilled water and an expansion inhibitor into starch suspension; dropwise adding aqueous alkali into the starch suspension to alkalify after the components of the starch suspension are evenly mixed; slowly dropwise adding a cationic etherifying agent solution to the alkalified solution, and carrying out heating reaction; cooling at room temperature after the reaction; dropwise adding acetic acid to neutralize, carrying out vacuum filtration, washing by an ethanol solution, drying an obtained solid mater, and crushing after drying so as to obtain the paper strengthening agent. The prepared paper strengthening agent is prepared into a solution and then added to a wet part of a paper machine in proportion, so that the physical strength of produced paper can be improved.

Description

technical field [0001] The invention belongs to the technical field of production of modified starch, and in particular relates to a paper-making strengthening agent and its preparation method and application. Background technique [0002] my country's modified starch industry started late, and its production capacity was low. Before 2000, the annual domestic output of modified starch was below 200,000 tons. Domestic consumption was highly dependent on imports, with an import dependence rate of more than 30%. Moreover, the variety and quality of domestic products cannot fully meet the market demand. [0003] Cationic starches mainly include tertiary amine salts and quaternary ammonium salts. Cationic starch has a low gelatinization temperature, is easy to disperse, has high viscosity and good thermal stability. Therefore, it is widely used in fields such as papermaking, textiles, food, petroleum, adhesives, mining, sewage treatment and cosmetics. Quaternary ammonium catio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H21/18C08B31/12
Inventor 杨仁党刘进阮蒙杨飞刘德桃
Owner 广东麦可瑞化工科技有限公司