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Preparation method of starch adhesive for papermaking coating, its product, and application of product

A technology of starch glue and starch, which is applied in coating, papermaking, paper coating, etc., can solve the problems of restricted application range, slow drying speed, poor water resistance, etc., and achieve the effects of easy operation, improved adhesion, and reduced production cost

Inactive Publication Date: 2012-11-21
EVERFIRST WISEFUND TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Starch has been used as an adhesive after gelatinization or oxidation modification for a long time, but its application range is greatly restricted due to its shortcomings such as poor water resistance, low initial viscosity, and slow drying speed.

Method used

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  • Preparation method of starch adhesive for papermaking coating, its product, and application of product
  • Preparation method of starch adhesive for papermaking coating, its product, and application of product
  • Preparation method of starch adhesive for papermaking coating, its product, and application of product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The weight of each material used is as follows (g):

[0029]

[0030] Process method: add citric acid to 35% cassava starch milk, adjust pH=2-3. Ammonium persulfate solution was added under stirring, the temperature was raised to 60°C, and the oxidation reaction was carried out for 1 hour. Adjust PH=4, add vinyl acetate and the remaining ammonium persulfate slowly at the same time, finish adding in 30 minutes, react at 75°C for 2 hours, adjust PH=7, add vinyltrimethoxysilane slowly at a uniform speed, finish adding in 10 minutes, then slowly add 5 % borax aqueous solution, keep the temperature at 80°C for 30min, cool down to 50°C, add urea and glycerol, stir for 20min, cool down to room temperature, discharge, and pack.

Embodiment 2

[0032] The weight of each material used is as follows (g):

[0033]

[0034] Process method: add hydrochloric acid to 30% cornstarch milk, adjust pH=2-3. Potassium persulfate solution was added under stirring, the temperature was raised to 60°C, and the oxidation reaction was carried out for 1 hour. Adjust PH=4, slowly add vinyl acetate, butyl acrylate and the remaining potassium persulfate at the same time, finish adding in 30 minutes, react at 75°C for 2 hours, adjust PH=7, add methacryloxypropyltrimethoxysilane slowly at a uniform speed After adding 10 minutes, slowly add 5% borax aqueous solution, keep the temperature at 80°C for 30 minutes, cool down to 50°C, add urea, alcohol ester-12, defoamer and fungicide, stir for 20 minutes, cool to room temperature, discharge, and pack.

Embodiment 3

[0036] The weight of each material used is as follows (g):

[0037]

[0038] Process method: add hydrochloric acid to cornstarch milk, adjust pH=2-3. Potassium persulfate solution was added under stirring, the temperature was raised to 60°C, and the oxidation reaction was carried out for 1.5 hours. Adjust PH=4, add vinyl acetate, butyl acrylate and the remaining potassium persulfate slowly at the same time, finish adding in 30 minutes, react at 70°C for 3 hours, adjust PH=7, add waterproof 3# slowly at a uniform speed, finish adding in 10 minutes, then slowly add 5% borax aqueous solution, keep the temperature at 80°C for 30 minutes, cool down to 50°C, add urea and alcohol ester-12, stir for 20 minutes, cool down to room temperature, discharge, and pack.

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PUM

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Abstract

The invention discloses a preparation method of a starch adhesive for a papermaking coating. The starch adhesive for the papermaking coating is obtained through treating starch as a raw material, carrying out modification treatments comprising degradation, grafting copolymerization and the like of the starch, carrying out crosslinking modification and heating gelatinization, and cooling. The starch adhesive is mainly used in the papermaking coating, and can partially substitute synthetic latex, so the cost of the papermaking coating is reduced. The starch which is adopted as the raw material in the invention costs low and is renewable; and the preparation method has the advantages of simple technology, simple operation, low energy consumption, and no pollution, and enables the synthetic product to satisfy application requirements, so the production cost can be reduced.

Description

technical field [0001] The invention relates to a preparation method of starch glue, in particular to a preparation method of starch glue for papermaking coating, and also relates to the application of the starch glue in papermaking coating, belonging to the field of papermaking chemicals. Background technique [0002] At present, with the economic development, the demand for paper-making coating latex is increasing, and the price of latex in the market is currently rising and the supply is in short supply. In order to reduce costs and reduce dependence on latex, it is imperative to use a relatively low-cost adhesive with sufficient supply as a raw material. Modified starch partially replaces latex as an adhesive and becomes the first choice. [0003] Starch is an organic compound abundant in nature, and has the advantages of wide sources, low price, complete degradability, and regeneration. Starch has been used as an adhesive after gelatinization or oxidation modification ...

Claims

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Application Information

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IPC IPC(8): D21H19/00C08F251/00C08B31/18
Inventor 雷得定侯智杰郝丙业
Owner EVERFIRST WISEFUND TECH BEIJING
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