Cation cross-linked styrene-acrylic surface sizing agent and preparation method thereof

A technology of surface sizing agent and cationic crossover, which is applied in the direction of adding water repellent, can solve the problems of complex production process and high sizing cost, and achieve the effects of improving physical strength, simple preparation method and convenient large-scale promotion.

Inactive Publication Date: 2015-08-19
杭州百事特实业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among the synthetic styrene-acrylic surface sizing agents, the styrene-acrylic surface sizing agents with a very high market share are all made of modified starch as a dispersant, and have a good use effect, but due to the modified starch The production process of styrene-acrylic surface sizing agent is complicated, and the cost of sizing is too high

Method used

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  • Cation cross-linked styrene-acrylic surface sizing agent and preparation method thereof
  • Cation cross-linked styrene-acrylic surface sizing agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Get 40g of butyl acrylate, 52g of styrene and 4g of dimethylaminoethyl methacrylate to mix uniformly to obtain a mixed monomer, and set aside; get 50g of corn starch, 300g of deionized water and 5g of paraffin into the reaction kettle, and start Stir and heat up. When the temperature rises to 60°C, add 2g ammonium persulfate, slowly heat up to 88-92°C, and keep warm for 1.5-2h; composition), the above mixed monomer and 5g N-methylolacrylamide, the dropping temperature is 85-88°C, and the dropping time is 1.5-2h; Insulation reaction, after the completion of the insulation, cool down to room temperature, filter through a 300-mesh filter, and obtain a light yellow to light brown-red cationic cross-linked styrene-acrylic surface sizing agent.

Embodiment 2

[0029] Get 45g tert-butyl acrylate, 61g styrene and 4g dimethylaminoethyl methacrylate to mix uniformly to obtain a mixed monomer, and set aside; get 58g wheat starch, 320g deionized water and 8g rosin into the reactor, Start stirring and heat up. When the temperature rises to 60°C, add 2.2g of ammonium persulfate, slowly heat up to 88-92°C, and keep warm for 1.5-2h; 20g of water), the above mixed monomers and 4.5g of glycidyl methacrylate, the dropping temperature is 85-88°C, and the dropping time is 1.5-2h; ~3h heat preservation, after the heat preservation is completed, lower to room temperature, filter through a 300-mesh filter, and then obtain a light yellow to light brown-red cationic cross-linked styrene-acrylic surface sizing agent.

Embodiment 3

[0031] Get 38.5g butyl acrylate, 43g vinyl acetate and 3g dimethylaminoethyl methacrylate to mix uniformly to obtain mixed monomers, set aside; get 63g native tapioca starch, 280g deionized water and 5.6g rosin into the reaction kettle During the process, start stirring and heat up. When the temperature rises to 60°C, add 2g of amylase, slowly raise the temperature to 88-92°C, and keep warm for 1.5-2h; 20g of water), mixed monomer and 5.03g of methacrylic acid, the dropping temperature is 85-88°C, and the dropping time is 1.5-2h; after the dropping, control the temperature at 88-90°C for 2-3h of heat preservation After the heat preservation is completed, lower it to room temperature and filter through a 300-mesh filter to obtain a light yellow to light brown-red cationic cross-linked styrene-acrylic surface sizing agent.

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Abstract

The invention relates to a cation cross-linked styrene-acrylic surface sizing agent and a preparation method thereof. The surface sizing agent comprises the following raw materials: 10-15 parts of dispersing agents, 0.5-1 parts of oxidizing agents, 1-3 parts of initiating agents, 10-20 parts of hard monomers, 10-15 parts of soft monomers, 1-10 parts of functional monomers, 1-10 parts of cationic monomers, 3-10 parts of crosslinking monomers and 50-80 parts of deionized water, wherein the hard monomer is one or combination of more than one of the styrene, vinyl acetate and methyl methacrylate, and the dispersing agent is native starch. The surface sizing agent utilizes the native starch as the dispersing agents to synthesize the styrene-acrylic surface sizing agent together with raw materials; and compared with a conventional starch-synthesized styrene-acrylic surface sizing agent, the surface sizing agent in the invention is better in film-forming property, higher in stability and higher in cost performance; and the surface sizing agent allows paper to have better water resistance, and meanwhile, can greatly reduce paper sizing cost.

Description

technical field [0001] The invention relates to a cationic crosslinking type styrene-acrylic surface sizing agent and a preparation method thereof. Background technique [0002] With the rapid development of papermaking technology, people's requirements for paper quality are also constantly increasing. Styrene-acrylic surface sizing agents have strong advantages in improving paper water resistance, improving paper surface strength and improving paper printing adaptability. As a low-cost and easy-to-take raw material, starch is gradually being widely used by people. Among the synthetic styrene-acrylic surface sizing agents, the styrene-acrylic surface sizing agents with a very high market share are all made of modified starch as a dispersant, and have a good use effect, but due to the modified starch The production process of special styrene-acrylic surface sizing agents is complicated, and the sizing cost is too high. Contents of the invention [0003] The technical prob...

Claims

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Application Information

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IPC IPC(8): D21H21/16C08F251/00C08F212/08C08F220/18C08F220/34C08F218/08
Inventor 胡钦澍唐彬海
Owner 杭州百事特实业股份有限公司
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