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Alkaline sizing agent in cationic rosin emulsion and preparation method thereof

A technology of cationic rosin and sizing agent, which is applied in the directions of adding rosin, adding water repellent, adding non-polymeric organic compounds, etc., can solve the problem of not being able to truly realize alkaline rosin sizing, and the difficulty of processing dry broken paper or returned paper, etc. problems, to achieve the effect of convenient recycling, improved surface strength and wet and dry strength, and improved sizing degree

Active Publication Date: 2021-01-19
龙游富田造纸精化有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it uses polyamide epichlorohydrin resin, which makes it difficult to handle dry broke or recycled paper
And can not really achieve the purpose of alkaline rosin sizing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] An alkaline sizing agent in cationic rosin emulsion, made of emulsifier, polymerized rosin and auxiliary materials, said emulsifier consists of 40 parts of methacrylic acid, 20 parts of dilute sulfuric acid, 30 parts of acrylic acid amine, 15 parts of styrene, 40 parts of isopropanol, 1 part of dodecanethiol, 1 part of acrylic acid and 1 part of ammonium persulfate are made, and the polymerized rosin is made of 20 parts of rosin, 11 parts of naphtha solvent, 5 parts of 98% sulfuric acid, anhydrous sulfuric acid Made from 1 part of zinc and 30 parts of deionized water at 50°C, the auxiliary materials include 11 parts of lignin, 20 parts of sodium hydroxide and 14 parts of glycerin.

[0019] A preparation method of alkaline sizing agent in cationic rosin emulsion, comprising the following steps:

[0020] 1) Preparation of emulsifier: 40 parts of methacrylic acid, 20 parts of dilute sulfuric acid, 30 parts of acrylic acid amine, 15 parts of styrene, 40 parts of isopropanol...

Embodiment 2

[0024]An alkaline sizing agent in cationic rosin emulsion, made of emulsifier, polymerized rosin and auxiliary materials, said emulsifier consists of 30 parts of methacrylic acid, 30 parts of dilute sulfuric acid, 40 parts of acrylic acid amine, 25 parts of styrene, 50 parts of isopropanol, 3 parts of dodecanethiol, 3 parts of acrylic acid and 3 parts of ammonium persulfate are made, and the polymerized rosin is made of 30 parts of rosin, 17 parts of naphtha solvent, 9 parts of 98% sulfuric acid, anhydrous sulfuric acid Made from 2 parts of zinc and 40 parts of deionized water at 50°C, the auxiliary materials include 17 parts of lignin, 30 parts of sodium hydroxide and 20 parts of glycerin.

[0025] A preparation method of alkaline sizing agent in cationic rosin emulsion, comprising the following steps:

[0026] 1) Preparation of emulsifier: 30 parts of methacrylic acid, 30 parts of dilute sulfuric acid, 40 parts of acrylic acid amine, 25 parts of styrene, 50 parts of isopropa...

Embodiment 3

[0030] An alkaline sizing agent in cationic rosin emulsion, made of emulsifier, polymerized rosin and auxiliary materials, said emulsifier consists of 35 parts of methacrylic acid, 25 parts of dilute sulfuric acid, 35 parts of acrylic acid amine, 20 parts of styrene, 45 parts of isopropyl alcohol, 2 parts of dodecanethiol, 2 parts of acrylic acid and 2 parts of ammonium persulfate are made, and the polymerized rosin is made of 25 parts of rosin, 14 parts of naphtha solvent, 7 parts of 98% sulfuric acid, anhydrous sulfuric acid Made from 1.5 parts of zinc and 35 parts of deionized water at 50°C, the auxiliary materials include 14 parts of lignin, 25 parts of sodium hydroxide and 17 parts of glycerin.

[0031] A preparation method of alkaline sizing agent in cationic rosin emulsion, comprising the following steps:

[0032] 1) Preparation of emulsifier: 35 parts of methacrylic acid, 25 parts of dilute sulfuric acid, 35 parts of acrylic acid amine, 20 parts of styrene, 45 parts of...

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PUM

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Abstract

The invention discloses a cationic rosin emulsion neutral-alkaline sizing agent. The cationic rosin emulsion neutral-alkaline sizing agent is prepared from an emulsifier, polymerized rosin and an auxiliary material, the emulsifier is prepared from methacrylic acid, diluted sulfuric acid, ammonium acrylate, styrene, isopropanol, dodecanethiol, acrylic acid and ammonium persulfate, the polymerized rosin is prepared from rosin, a naphtha solvent, 98% sulfuric acid, anhydrous zinc sulfate and 50 DEG C deionized water, and the auxiliary materials includes lignin, sodium hydroxide and glycerin. Thecationic rosin emulsion neutral-alkaline sizing agent can improve the gloss of paper, and allows a sized surface to have a good strength and remarkably improved dry-wet strength, paper produced by using the cationic rosin emulsion neutral-alkaline sizing agent can be easily recovered and treated, and aluminum sulfate is not added in the preparation process to obtain the alkaline sizing agent handle.

Description

technical field [0001] The invention relates to an alkaline sizing agent in cationic rosin emulsion and a preparation method thereof. Background technique [0002] Sizing is a process in papermaking, using sizing agents to make paper water-resistant. Sizing agent is a chemical that can make paper water-resistant, and sizing is to form a low-energy liquid-repellent film on the surface of paper through a certain process, so that paper and cardboard can resist fluid (mainly water). Usually this lyophobic film is composed of substances with low surface free energy, which are evenly distributed on the surface of the fiber, preventing or delaying the penetration and diffusion of liquid to the paper fiber. Compared with surface sizing, internal pulp sizing has the advantage of making the paper obtain overall and uniform water resistance, and at the same time, in some paper types, it prevents the surface glue from penetrating into the paper. [0003] The development and applicatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H17/62D21H17/37D21H17/23D21H17/06D21H21/16
Inventor 周建恩周游钟庆辉陈兴理
Owner 龙游富田造纸精化有限公司