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Preparation method for AKD gel emulsifier

A technology of emulsifier and regulator, applied in the direction of water repellent addition, no pigment coating, coating, etc., can solve the problems of long sizing curing time, slow fiber response, low fiber retention, etc., to solve thermal stickiness Effects of cold brittleness, enhanced water resistance, and improved sizing efficiency

Inactive Publication Date: 2015-12-02
HEFEI LONGFA PACKING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] AKD is currently the most widely used medium-alkaline sizing agent in the paper industry. The development and development of its emulsifier has become a research hotspot. The traditional AKD emulsion uses cationic starch as an emulsifier and stabilizer, which has low retention on fibers, and The fiber reaction is slow and the sizing and curing time are long. The AKD emulsifiers that have appeared, such as high molecular polymer emulsifiers, are expensive and have the problem of polluting the environment. In order to overcome these problems, there is an urgent need for a suitable The preparation method of the emulsifier rapidly matured in medium alkaline gum

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Add 0.8 parts of adipic acid to 1.6 parts of 35% diethylenetriamine solution, heat to 120-140°C, keep warm for 30 minutes, then add 0.6 parts of thiourea, stir while heating to 180-220°C, After keeping it for 1.5 hours, cool down to 50-70°C, add 0.4 parts of sodium bicarbonate and 0.8 parts of sodium dihydrogen phosphate to adjust the pH value of the solution to 8, and when the viscosity reaches 1000mPa*s, add 30 parts of polyamide epoxy The chloropropane resin was stirred for 30 minutes to obtain a modified polyamide epichlorohydrin resin; 4 parts of maltodextrin was diluted with 100 times of water, and then 18 parts of polyaluminum chloride, 32 parts of modified epoxy chloride were added The mixture of propane resin and 42 parts of acrylamide, stir evenly, heat to 40-60°C, keep the temperature for 2 hours; add 0.2 parts of citric acid, 0.6 parts of hydrochloric acid to adjust the pH value of the mixture to 6, add 4 One part of water-soluble fluoride, heated to 70-90°C...

Embodiment 2

[0020] Add 1 part of adipic acid to 2 parts of 35% diethylenetriamine solution, heat to 120-140°C, keep warm for 30 minutes, then add 0.8 part of thiourea, stir while heating to 180-220°C, After keeping for 2 hours, lower the temperature to 50-70°C, add 1 part of potassium hydroxide to adjust the pH value of the solution to 7.5, and when the viscosity reaches 1000mPa*s, add 28 parts of polyamide epichlorohydrin resin and stir for 20 minutes to obtain the modified solution. Sexual polyamide epichlorohydrin resin; dilute 6 parts of phospholipid starch amphoteric starch with 100 times of water, then add 22 parts of polyaluminum chloride, 28 parts of modified epichlorohydrin resin and 40 parts of propylene Mixture of amides, stir well, heat to 40-60°C, keep the temperature for 2 hours; add 1 part of hydrochloric acid to adjust the pH value of the mixture to 5.5, add 2 parts of water-soluble fluoride, heat to 70-90 ℃, stirred, and after 4 hours, naturally cooled to room temperature...

Embodiment 3

[0023] Add 1.6 parts of adipic acid to 3.2 parts of 35% diethylenetriamine solution, heat to 120-140°C, keep warm for 40 minutes, then add 1.2 parts of thiourea, stir while heating to 180-220°C, After keeping for 2 hours, lower the temperature to 50-70°C, add 0.8 parts of sodium hydroxide to adjust the pH value of the solution to 8, and when the viscosity reaches 1000mPa*s, add 33 parts of polyamide epichlorohydrin resin and stir for 40 minutes to obtain the improved permanent polyamide epichlorohydrin resin; dilute 2 parts of oxidized cross-linked starch and 6 parts of esterified starch with 100 times of water, then add 24 parts of polyaluminum chloride, 33 parts of modified epichlorohydrin The mixture of resin and 30 parts of acrylamide, after stirring evenly, is heated to 40-60°C and kept at the temperature for 2-4 hours; add 0.4 parts of adipic acid and 0.8 parts of phosphoric acid to adjust the pH value of the mixture to 6.5, Add 4 parts of water-soluble fluoride, heat to...

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PUM

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Abstract

The present invention discloses a preparation method for an AKD gel emulsifier. The method mainly comprises the main steps: modification of polyamide epichlorohydrin resin and reaction between modified starch and other raw materials in a specific condition to obtain the emulsifier. Compared to the prior art, the preparation method disclosed by the present invention has the following advantages that the preparation method is simple, safe and non-poisonous, so that no environmental pollution is caused; a neutral-basic gel can be emulsified rapidly, the aging speed is faster and the water resistance is strengthened, and the stability and the sizing efficiency of the prepared AKD emulsion are significantly improved.

Description

technical field [0001] The invention belongs to the technical field of packaging material neutral glue, and in particular relates to a preparation method of an AKD latex emulsifier. Background technique [0002] AKD is currently the most widely used medium-alkaline sizing agent in the paper industry. The development and development of its emulsifier has become a research hotspot. The traditional AKD emulsion uses cationic starch as an emulsifier and stabilizer, which has low retention on fibers, and The fiber reaction is slow and the sizing and curing time are long. The AKD emulsifiers that have appeared, such as high molecular polymer emulsifiers, are expensive and have the problem of polluting the environment. In order to overcome these problems, there is an urgent need for a suitable A method for preparing an emulsifier for rapid aging of medium-alkaline gums. Contents of the invention [0003] The purpose of the present invention is to provide a kind of preparation me...

Claims

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Application Information

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IPC IPC(8): D21H21/16D21H19/30D21H19/14D21H19/24
Inventor 林悦敏
Owner HEFEI LONGFA PACKING CO LTD
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