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Method for preparing alkaline sizing agent in cation rosin

A cationic rosin and sizing agent technology, applied in the chemical field, can solve problems that do not conform to social development and progress, poor emulsion stability, and three wastes polluting the environment, so as to reduce the loss of fine fibers, reduce the concentration of white water, reduce treatment costs and environmental protection pollution effect

Inactive Publication Date: 2009-04-22
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because AKD and ASA are easy to decompose, the stability of the emulsion is poor, and it is difficult to store
At present, most domestic paper mills still use common saponified rosin gum (free rosin content is below 40%), and use acidic papermaking technology for production. The three wastes are seriously polluted and have a huge impact on the environment, which is obviously not in line with social development and progress.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Embodiment 1: first, in the acetone solution, feed trimethylamine gas slowly, obtain trimethylamine acetone solution; Trimethylamine acetone solution and epichlorohydrin are mixed by the molar ratio of 1.1: 1, stir 24 hours at room temperature, obtain Glycidyltrimethylammonium chloride dispersion system with acetone as the medium; mix dodecanoic acid, stearic acid and 20% aqueous sodium hydroxide solution in a molar ratio of 2:1:3 to obtain a mixed solution , then add acetone with 2 times the quality of the mixed solution as the reaction solvent, and after the saponification is complete, add rosin to the saponified solution at a mass ratio of 8:100 with the mixed solution: rosin, so that it is completely dissolved to obtain a rosin solution ; The glycidyltrimethylammonium chloride dispersion system with acetone as the medium is added in the rosin solution, and its mixing ratio is that the rosin in the glycidyltrimethylammonium chloride and the rosin solution is by the qu...

Embodiment 2

[0011] Embodiment 2: first, slowly pass into trimethylamine gas in acetone solution, obtain trimethylamine acetone solution; Trimethylamine acetone solution and epichlorohydrin are mixed by the molar ratio of 1.3: 1, stir 24 hours at room temperature, obtain Glycidyltrimethylammonium chloride dispersion system with acetone as the medium; mix dodecanoic acid, stearic acid and 23% sodium hydroxide aqueous solution in a molar ratio of 2:1:3 to obtain a mixed solution , then add acetone with 2.5 times the mass of the mixed solution as the reaction solvent, and after the saponification is complete, add rosin to the saponified solution at a mass ratio of 10:100 with the mixed solution: rosin, so that it is completely dissolved to obtain a rosin solution ; The glycidyltrimethylammonium chloride dispersion system with acetone as the medium is added in the rosin solution, and its mixing ratio is that the rosin in the glycidyltrimethylammonium chloride and the rosin solution is by the qu...

Embodiment 3

[0012] Embodiment 3: first, feed trimethylamine gas slowly into acetone solution, obtain trimethylamine acetone solution; Trimethylamine acetone solution and epichlorohydrin are mixed by the molar ratio of 1.5: 1, stir at room temperature for 24 hours, obtain Glycidyltrimethylammonium chloride dispersion system with acetone as the medium; mix dodecanoic acid, stearic acid and 25% aqueous sodium hydroxide solution in a molar ratio of 2:1:3 to obtain a mixed solution , then add acetone with 2.8 times the mass of the mixed solution as the reaction solvent, and after the saponification is complete, add rosin to the solution after saponification with the mixed solution: rosin at a mass ratio of 5:100, so that it is completely dissolved to obtain a rosin solution ; The glycidyltrimethylammonium chloride dispersion system with acetone as the medium is added in the rosin solution, and its mixing ratio is that the rosin in the glycidyltrimethylammonium chloride and the rosin solution is...

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Abstract

A method for preparing basic glue blending agent in cation iron rosin includes steps of: using rosin and trimethylamine as main raw material, choosing an epoxy-containing monomer to react with the raw material to prepare the cation iron rosin ester, and after a certain condition, reacting to rosin emulsion. The invention can equally distribute a substance of low surface free energy on paper surface to form a liquid-proof film, the liquid-proof film can prevent or defer liquid permeation or diffusion to fiber, and make paper or cardboard with liquid (especially water and water solution) permeation and diffusion resistance.

Description

technical field [0001] The invention belongs to the technical field of chemistry, and in particular relates to a preparation method of an alkaline sizing agent in cationic rosin. Background technique [0002] Rosin is an abundant renewable resource. Since the 20th century, with the advancement of science and technology and the great improvement of social productivity, human beings have created unprecedented material wealth and accelerated the development of civilization. At the same time, problems such as rapid population growth, excessive consumption of resources, environmental pollution, ecological pollution, and the widening gap between North and South have become increasingly prominent and have become major global problems, seriously hindering economic development and improving people's quality of life, and threatening future survival and development of all mankind. In this severe situation, people must strive to find a sustainable development path in which the economy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H21/16
Inventor 杨建洲张龙苗宗成
Owner SHAANXI UNIV OF SCI & TECH
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