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Biological latex, preparation method and application thereof

A technology of biological latex and mixed latex, which is applied in coatings, paper coatings, textiles and papermaking, etc., can solve the problems of being easily affected by the oil market, increasing the production cost of coated paper, and high prices, so as to achieve rich and cheap raw materials, reduce production costs and The effect of controlling production cost and low production cost

Active Publication Date: 2012-12-19
GOLD EAST PAPER JIANGSU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the production of coated paper, the commonly used coating adhesive is synthetic latex, which is synthesized from petroleum products, which not only has a high price, but is also easily affected by the oil market, so the production cost of coated paper increases and is difficult to control

Method used

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  • Biological latex, preparation method and application thereof
  • Biological latex, preparation method and application thereof
  • Biological latex, preparation method and application thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0011] The preparation method of biological latex among the present invention is as follows:

[0012] (1) Prepare plant starch into starch slurry. The starch can be one of plant starches such as corn, potato and cassava, or any mixture thereof. The mass concentration of the starch slurry is 35-40%.

[0013] (2) Add a graft modifier of 1-20% of the starch mass and an initiator of 0.1-1% of the starch mass, and react for 3-5 hours at 30-50°C, wherein the graft modifier is propylene One of amides, acrylonitrile, methacrylamide, N-methacrylamide, N.N-dimethylacrylamide or any mixture thereof, the initiator is potassium permanganate;

[0014] (3) adding an oxidizing agent of 10-30% of the starch mass to carry out a trace oxidation reaction, wherein the oxidizing agent can be sodium hypochlorite or hydrogen peroxide;

[0015] (4) Dilute the starch slurry to a mass concentration of 6-10%

[0016] (5) drying and gelatinizing the mixed emulsion to obtain biological latex. Wherein ...

Embodiment 1

[0019] Embodiment 1: Under the protection of nitrogen, add 140g of absolute dry raw cassava starch in the reaction kettle, add water to 400g to prepare a starch slurry with a mass concentration of 35%, keep the temperature at 40°C, add 14g of acrylonitrile and 0.2 g potassium permanganate, reacted for 4 hours, in order to speed up the reaction rate, it can also be reacted under electric agitator stirring, then add 14g of hydrogen peroxide and dilute the starch slurry to 8% mass concentration, and use the roller gelatinization film-forming method to gelatinize , use a metering rod to apply the reacted starch slurry on a drum or drying cylinder, the gelatinization temperature is 90 degrees Celsius, and then scrape off the film and grind it into a fine powder to obtain bio-latex.

[0020] Using 50% of biological latex instead of synthetic latex to prepare paint, the application effect is shown in the table below:

[0021]

Embodiment 2

[0022] Embodiment 2: Under the protection of nitrogen, add 160g of absolute dry raw cassava starch in the reaction kettle, add water to 400g to prepare a starch slurry with a mass concentration of 40%, keep the temperature at 40°C, add 20g of acrylamide and 0.3 g potassium permanganate, reacted for 4 hours, in order to speed up the reaction rate, it can also be reacted under electric agitator stirring, then add 25g of sodium hypochlorite and dilute the starch slurry to 8% mass concentration, and use the roller gelatinization film-forming method to gelatinize , use a metering rod to apply the reacted starch slurry on a drum or drying cylinder, the gelatinization temperature is 95 degrees Celsius, scrape off the film and grind it into a fine powder to obtain bio-latex.

[0023] Using 50% of biological latex instead of synthetic latex to prepare paint, the application effect is shown in the table below:

[0024]

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Abstract

The invention relates to a preparation method of biological latex used for coated paper production. The method comprises the steps of providing a starch slurry; adding a graft modification agent with an amount of 1%-20% by mass of the starch and an initiator with an amount of 0.1%-1% by mass of the starch into the starch slurry; reacting for 3-5 hours at a temperature of 30-50 DEG C; adding an oxidant with an amount of 10%-30% by mass of the starch, thereby obtaining a mixed emulsion; and drying and gelatinizing the mixed emulsion, thereby obtaining the biological latex. The preparation method of the biological latex employs plant starch and the graft modification agent as raw materials, has rich and inexpensive raw materials, and does not depend on petroleum products, thereby being helpful to reduce and control production cost of the coated paper. The invention also provides biological latex obtained from the above preparation method and an application of the biological latex. Each parameters of the biological latex are similar with corresponding parameter of conventional synthetic latex at the same conditions, so that the biological latex can replace the conventional synthetic latex.

Description

technical field [0001] The invention relates to the field of coated paper production, in particular to a biological latex for coated paper production, a preparation method and application thereof. Background technique [0002] Coated paper is widely used for printing magazines, books, and other publishing papers, as well as printing papers for trademarks, packaging, and catalogs. Coated paper is coated with a layer of coating color on the base paper, so that the paper has good optical properties and printing performance. The composition of the paint can be roughly divided into four categories: pigments, adhesives, additives and water. In the production of coated paper, the commonly used coating adhesive is synthetic latex, which is synthesized from petroleum products, which is not only expensive, but also easily affected by the oil market, which increases the production cost of coated paper and is difficult to control. Contents of the invention [0003] In view of this, ...

Claims

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Application Information

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IPC IPC(8): C08B31/18C08F251/00D21H19/00
Inventor 王仁荣张明邓升鸿
Owner GOLD EAST PAPER JIANGSU
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