Intensifier for paper as well as preparation method and application thereof

A technology for strengthening agent and paper, applied in the direction of strengthening agent addition, etc., can solve the problems of low degree of product substitution and complex synthesis steps, and achieve the effect of expanding the scope of application, simple operation and reducing equipment investment.

Inactive Publication Date: 2008-08-27
SHANGHAI DONGSHENG NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the main problems of these patented technologies are that the synthesis steps are complex and the product substitution degree is low.

Method used

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  • Intensifier for paper as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Add 32kg of ethanol and 8kg of deionized water into a 100-liter reactor, stir, add 20kg of guar collagen powder, add 0.2kg of diethanolamine while stirring, heat up to 35°C while stirring, react at this temperature for 90min, and then cool down to 25°C, replace the air with nitrogen, add 8kg of ethylene oxide in an oxygen-free atmosphere, heat up to 50°C, react at this temperature for 5 hours, then cool down to 30°C, and adjust the pH value with glacial acetic acid to Around 7.0.

[0019] The material is filtered with suction, washed once with ethanol / water mixture (ethanol: water = 9: 1), filtered with suction, washed once with 95% ethanol, washed, filtered with suction, and the filter cake is dried under vacuum at a temperature of 70°C After 2 hours, dry it, crush it, and pass through a 100-mesh sieve to get the finished product; the code is HPG1.

Embodiment 2

[0021] Add 32kg of industrial ethanol and 8kg of deionized water into a 100-liter reactor, stir, add 20kg of guar collagen powder, add 0.5kg of triethanolamine under stirring, heat up to 40°C under stirring, and react at this temperature for 75min, then Cool down to 27°C, then replace the air with nitrogen, add 10kg of ethylene oxide in an oxygen-free atmosphere, heat up to 60°C, react at this temperature for 4 hours, then cool down to 30°C, adjust the pH with glacial acetic acid value to around 7.0.

[0022] The material is filtered with suction, washed once with ethanol / water mixture (ethanol: water = 9: 1), filtered with suction, washed once with 95% ethanol, washed, filtered with suction, and the filter cake is dried under vacuum at a temperature of 70°C After 2 hours, dry and pulverize, and pass through a 100-mesh sieve to obtain a finished product, numbered HPG2.

Embodiment 3

[0024] Add 28kg of industrial ethanol and 12kg of deionized water into a 100-liter reactor, add 30kg of guar collagen powder under stirring, add 0.7kg of diethylamine under stirring, heat up to 45°C under stirring, and react at this temperature for 60min. Then cool down to 30°C, then replace the air with nitrogen, add 4.5kg of propylene oxide in an oxygen-free atmosphere, heat up to 50°C, react at this temperature for 5 hours, then cool down to 30°C, adjust with glacial acetic acid The pH value is around 7.0. The material is filtered with suction, washed once with ethanol / water mixture (ethanol: water = 9: 1), filtered with suction, washed once with 95% ethanol, washed, filtered with suction, and the filter cake is dried under vacuum at a temperature of 70°C After 2 hours, dry and pulverize, and pass through a 100-mesh sieve to obtain a finished product, numbered HPG3.

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Abstract

The invention provides a paper reinforcer and a method for preparation and an application thereof, wherein the method for preparation comprises the following steps: (1) stirring and blending solvent 40-60 parts by weight and guar gum powder 10-20 parts by weight, then, charging catalyst 0.2-1 parts by weight to react in the temperature of 35-60 DEG C for 30-90 min, cooling to the temperature of 25-30 DEG C, aerating nitrogen to remove oxygen, (2) charging etherifying agent, then, heating to the temperature of 40-90 DEG C to react for 2-5 h, reducing temperature to 30-40DEG C, charging neutralization agent to control pH value of the reactant between 6 and 8, and collecting the paper reinforcer from the reaction product. The prepared paper reinforcer of the invention can rapidly dissolve after meeting water in the indoor temperature and is simple in operation, and good in powder fluidity and stability, which can be applied in thin paper, special paper, drawing paper and the like besides cigarette paper.

Description

technical field [0001] The invention relates to a strengthening agent for paper and its application in papermaking. Background technique [0002] At present, modified starch and cationic polyacrylamide are generally used as reinforcing agents in the paper industry. However, domestic starch sources vary, there are many types, and the ratio of straight chain and branched chain is different, which seriously affects the stability of the quality of its modified products. [0003] Larger domestic paper mills had to use wet-end additives produced by large foreign companies, resulting in increased paper costs. On the other hand, cationic polyacrylamide is not easy to biodegrade, and the residual monomer has certain toxicity, which limits its application in household paper and high-grade paper. Moreover, the reuse of white water containing cationic polyacrylamide causes the enrichment of positive charges, which affects the paper evenness and the stability of the papermaking system. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/18
Inventor 施晓旦李改霞王养臣
Owner SHANGHAI DONGSHENG NEW MATERIALS
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