Surface glue coating agent and preparation method thereof

A surface sizing agent and initiator technology, which is applied in the addition of water repellents, textiles and papermaking, papermaking, etc., can solve the problem of disturbing the ion balance of the papermaking system. Affect normal production and other problems, achieve good environmental adaptability, improve sizing effect, and cost-effective effects

Active Publication Date: 2018-05-08
ZHEJIANG TRANSFAR WHYYON CHEM
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  • Abstract
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  • Claims
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Problems solved by technology

Even in some papermaking environments, if aluminum sulfate additives are not added, some styrene-acrylic polymer surface sizing agents are difficult to achieve the sizing effect under the same amount of sizing agent
However, aluminum sulfate also brings extremely adverse negative effects while improving the sizing effect. When aluminum sulfate is used in the papermaking process, it will cause the paper to become brittle and even break the paper, which will reduce the performance of the paper and cause serious damage to the paper. It will cause the shutdown of the paper machine and affect the normal production. The high cationicity of aluminum sulfate will also disturb the ion balance of the entire papermaking system and affect the use of other papermaking additives. Therefore, for example, aluminum sulfate additives will not be used in the production process of white board paper. agent

Method used

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  • Surface glue coating agent and preparation method thereof
  • Surface glue coating agent and preparation method thereof

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preparation example Construction

[0049] The preparation method of surface sizing agent, it carries out as follows:

[0050] 1) Cationic modified starch

[0051] Add starch, deionized water, and 10% catalyst solution into the reactor, stir and heat up to 40-60°C, then add cationic etherification agent, react at 40-60°C for 4-8h, and then add 20% acid The solution adjusts the pH value of the reaction system to 4.5-6.5, then adds a cross-linking agent, continues the reaction at 40-60° C. for 1-2 hours, and then separates and dries to obtain cationic modified starch.

[0052] 2) Preparation of surface sizing agent

[0053] (1) Monomer solution preparation: uniformly mix the first unsaturated monomer, the second unsaturated monomer, the cationic monomer and the functional monomer to obtain a monomer solution;

[0054] (2) Initiator I solution preparation: Initiator I and 15% deionized water are mixed uniformly to make free radical initiator I solution;

[0055] (3) Add the above-mentioned self-made cationic mod...

Embodiment 1

[0070] 1) Preparation of cationic modified starch

[0071] 1.5 parts by mass of potassium hydroxide, 2 parts by mass of hydrochloric acid were mixed with deionized water respectively into 10%, 20% solutions; in the reactor, 80 parts by mass of tapioca starch, 189.5 parts by mass of deionized water, 15 parts by mass of 10 % mass concentration of potassium hydroxide solution, stirred and heated to 40°C, then added 4 parts by mass of 2,3-epoxypropyltrimethylammonium chloride, reacted at 40°C for 4h, and then added 10 parts by mass of 20% The hydrochloric acid solution of mass concentration adjusted the pH value of the reaction system to 6, then added 3 parts by mass of epichlorohydrin, and continued the reaction at 40° C. for 1 h. During the entire reaction process, the mass fraction of cationic modified starch was 30%. Separating and drying to obtain cationic modified starch.

[0072] 2) Preparation of surface sizing agent

[0073] (1) Monomer solution preparation: 5 parts by ...

Embodiment 2

[0077] 1) Preparation of cationic modified starch

[0078] First, 3 parts by mass of sodium hydroxide and 4 parts by mass of hydrochloric acid were prepared into 10% and 20% solutions with deionized water respectively; 82 parts by mass of cornstarch, 144 parts by mass of deionized water, 30 parts by mass of 10% sodium hydroxide solution, stirred and heated to 45°C, then added 8 parts by mass of 3-chloro-2-hydroxypropyltrimethylammonium chloride, reacted at 45°C for 5h, then added 20 parts by mass of 20% hydrochloric acid solution to adjust the pH value of the reaction system to 6.5, then add 4 parts by mass of epichlorohydrin, and continue the reaction at 45°C for 1.5h. During the entire reaction process, the mass fraction of cationic modified starch is 35%, and then separated and drying to obtain cationic modified starch.

[0079] 2) Preparation of surface sizing agent

[0080] (1) Monomer solution preparation: 10 parts by mass of α-methylstyrene, 10 parts by mass of methyl...

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Abstract

The invention discloses a surface glue coating agent and a preparation method thereof. The surface glue coating agent is prepared from the following ingredients through copolymerization: cross-linkedetherified cationic modified starch, first unsaturated monomers, second unsaturated monomers, cationic monomers and function monomers, wherein the cross-linked etherified cationic modified starch is prepared from the following raw materials in parts by mass: 80 to 90 parts of starch, 4 to 12 parts of cationic etherifying agents and 1.5 to 7 parts of cross-linking agents. The preparation method ofthe surface glue coating agent comprises the steps of preparing the cross-linked etherified cation modified starch and preparing the surface glue coating agent. The prepared surface glue coating agenthas high surface glue coating performance; a good glue coating effect is still realized under the condition of low glue coating quantity or relative severe environment glue coating environment; the advantages of fast curing, high cost performance, safety and environment-friendly effect and the like are also realized.

Description

technical field [0001] The invention belongs to the field of paper surface treatment agents, in particular to a surface sizing agent and a preparation method thereof. Background technique [0002] Surface sizing is to coat a layer of sizing agent on the surface of paper and cardboard, which is usually coated with starch as a carrier. After surface sizing treatment, the surface properties of paper will change, and its various application properties will be significantly improved. With the rapid development of papermaking technology, and based on the comprehensive consideration of energy and environment, the papermaking conditions of the modern papermaking industry have changed significantly, and the papermaking environment has become more severe and harsh; Requirements are also constantly increasing, so higher requirements are placed on the development and application of related paper chemicals. Especially for the production of various paper and cardboard, in order to obtain...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/16D21H19/20C08B31/12C08F251/00C08F212/08C08F220/18C08F220/34C08F230/08C08F212/12C08F220/14C08F220/20C08F218/08C08F220/06C08F220/32C08F220/58
CPCD21H19/20D21H21/16C08B31/125C08F251/00C08F220/1806C08F220/1802C08F220/58C08F220/34C08F220/1804C08F220/1808C08F230/08C08F220/325
Inventor 梁福根刘钦屈亚平梁聪慧吴晓敏
Owner ZHEJIANG TRANSFAR WHYYON CHEM
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