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Gypsum plaster board modified starch and production method thereof

A technology of gypsum board and modified starch, applied in the directions of starch-derived adhesives, adhesive types, etc., can solve the problems of unstable product quality, unfavorable large-scale use of gypsum board, expensive raw materials, etc.

Inactive Publication Date: 2015-01-07
殷霞
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its manufacturing process is complicated, the raw materials are expensive, the production cost is high, and the product quality is unstable, which is not conducive to large-scale use in the manufacture of paper-faced gypsum boards.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Put 2000kg of starch into a reaction vessel at a temperature of 50°C, add 15kg of hydrochloric acid with a Baume degree of 18, then use 10kg of water to dissolve 3kg of ammonium persulfate, add it to the starch, and react for 100 minutes, then take 50g of the reaction substance from the reaction tank and add Dilute and dissolve with 135ml of water, then add 18ml of 30% liquid caustic soda, after gelling, pour it into the "Tu-4" cup at 30°C to measure its viscosity.

[0025] Viscosity of the product is detected as "Tu-4" cup for 180 seconds, then continue to react for 8 minutes, take 50g of reaction substance from the reaction tank and add 135ml of water to dilute and dissolve, then add 18ml of 30% concentration liquid caustic soda, after gelling, in Pour it into the "Tu-4" cup at 30°C to measure its viscosity. After testing, the viscosity of the product is "Tu-4" cup for 120 seconds, then add 20kg of Shuangfei powder for neutralization, stir for 15 minutes, and control t...

Embodiment 2

[0027] Put 2000kg of starch into a reaction vessel at a temperature of 60°C, add 12kg of hydrochloric acid with a Baume degree of 18, then use 12kg of water to dissolve 3kg of ammonium persulfate, add it to the starch, and react for 100 minutes, then take 50g of the reaction substance from the reaction tank and add Dilute and dissolve with 135ml of water, then add 18ml of 30% liquid caustic soda, after gelling, pour it into the "Tu-4" cup at 30°C to measure its viscosity.

[0028] Viscosity of this product is detected as "Tu-4" cup for 170 seconds, then continue to react for 6 minutes, take 50g of reaction substance from the reaction tank, add 135ml of water to dilute and dissolve, then add 18ml of 30% concentration liquid alkali, after gelling, it will be dissolved in 30 Pour it into the "Tu-4" cup at ℃ to measure its viscosity. After testing, the viscosity of the product is "Tu-4" cup for 120 seconds, then add 15kg of Shuangfei powder for neutralization, stir for 15 minutes, ...

Embodiment 3

[0030] Put 2000kg of starch into a reaction vessel at a temperature of 70°C, add 12kg of hydrochloric acid with a Baume degree of 19, then use 10kg of water to dissolve 4kg of ammonium persulfate, add it to the starch, and react for 100 minutes, then take 50g of the reaction substance from the reaction tank and add Dilute and dissolve with 135ml of water, then add 18ml of 30% liquid caustic soda, after gelling, pour it into the "Tu-4" cup at 30°C to measure its viscosity.

[0031] After testing the viscosity of the product is "Tu-4" cup for 160 seconds, then add 15kg Shuangfei powder for neutralization, stir for 15 minutes, and control the product pH value to 8; at this time, make the product moisture content to be 12% by weight, and finally, discharge , Cool, sieve, pack.

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PUM

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Abstract

The invention provides a gypsum plaster board modified starch and a production method thereof. The gypsum plaster board modified starch comprises the following components: starch, hydrochloric acid, ammonium persulfate and alkaline pH value modifier; the production method comprises the following steps: (1) adding starch into a reaction container of 50DEG C-70DEG C, and adding hydrochloric acid of corresponding proportion; (2) adding a proper amount of water into the ammonium persulfate of corresponding proportion to prepare an ammonium persulfate water solution, and then adding into the reaction container; (3) reacting the materials for 100-150 minutes; (4) when the viscosity meets the requirement, immediately adding the alkaline pH modifier for neutralization, stirring for 15-20 minutes, and controlling the pH of the product to be 5-8; and (5) discharging the product, cooling, sieving and bagging. According to the gypsum plaster board modified starch and the production method thereof, the traditional wet-process production technology is changed by adopting dry-process semi-dry process production technology, and the defects that the dry process cannot perform continuous production, the product is extremely instable can be overcome. Through the technology, large-scale industrial production is performed, the old production technology is thoroughly changed, so that the gypsum plaster board modified starch and the production method thereof are worthy of popularization.

Description

technical field [0001] The invention relates to the technical field of modified starch and a production method thereof, in particular to a modified starch for gypsum boards and a production method thereof. Background technique [0002] Modified starch for paper surface gypsum board is widely used in the bonding of protective paper and gypsum. It is favored by the building material industry for its environmental protection, regeneration and low price. However, most of its existing production is wet production with high investment and high pollution, or the so-called "dry" production that cannot be continuously produced and is unstable in small workshops. [0003] The Chinese patent discloses a particle waterproof corrugated cardboard (publication number CN 1449913A), which is composed of several layers of kraft liner boards and corrugated base paper respectively arranged between the kraft liner boards. The cardboard and corrugated base paper are bonded with nano-scale calciu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B31/18C09J103/10
Inventor 殷霞
Owner 殷霞
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