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

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
Comparison scheme
Effect test

Example Embodiment

[0011] The preparation method of the biological latex in 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 tapioca, or any mixture thereof. The mass concentration of the starch slurry is 35-40%.

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

[0014] (3) Add an oxidant with 10-30% of the starch mass to carry out a trace oxidation reaction, wherein the oxidant 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 a biological latex. The gelatinization temperature is 90-100 degrees Celsius.

[0017] The...

Example Embodiment

[0019] Example 1: Under the protection of nitrogen, 140g of absolutely dry tapioca starch was added to the reactor, and water was added to 400g to prepare a starch slurry with a mass concentration of 35%. The temperature was kept at 40°C. 14g of acrylonitrile and 0.2 were added to the starch slurry. g potassium permanganate, react for 4 hours, in order to speed up the reaction rate, it can also be reacted under the stirring of an electric stirrer, and then add 14 g of hydrogen peroxide and dilute the starch slurry to 8% mass concentration, and use roller gelatinization film forming method to gelatinize , Use a metering rod to coat the reacted starch slurry on a drum or a drying cylinder at a gelatinization temperature of 90 degrees Celsius, then scrape the film and grind it into fine powder to obtain a biological latex.

[0020] Using bio-latex 50% addition amount to replace synthetic latex to prepare paint, the application effect is shown in the following table:

[0021]

Example Embodiment

[0022] Example 2: Under the protection of nitrogen, 160g of absolutely dry tapioca starch was added to the reactor, and water was added to 400g to prepare a starch slurry with a mass concentration of 40%, at a constant temperature of 40°C, and 20g of acrylamide and 0.3 were added to the starch slurry. g potassium permanganate, react for 4 hours, in order to speed up the reaction rate, it can also be reacted under the stirring of an electric stirrer, and then add 25g of sodium hypochlorite, dilute the starch slurry to 8% mass concentration, and use roller gelatinization film forming method to gelatinize , Use a metering rod to coat the reacted starch slurry on a drum or a drying cylinder at a gelatinization temperature of 95 degrees Celsius, scrape the film and grind it into fine powder to obtain a biological latex.

[0023] Using bio-latex 50% addition amount to replace synthetic latex to prepare paint, the application effect is shown in the following table:

[0024]

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PUM

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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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