Preparation of high-strength environment-friendly skin gelatin

A skin gelatin, high-strength technology, applied in the direction of protein waste adhesives, rosin coatings, etc., can solve the problems of affecting the fluidity of the rubber material, viscosity increase, etc., and achieve fast drying speed, short synthesis time, and high bonding strength Effect

Inactive Publication Date: 2008-10-08
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the viscosity of skin gelatin changes in a wide range with temperature changes. As the temperature drops, the viscosity rises sharply, which affects the fluidity of the rubber compound and brings insurmountable difficulties to the control and operation of industrialized mass production.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0006] Embodiment 1: at first by the mass ratio of 1: 3, skin gelatin and water are jointly added in the reactor, be warmed up to 75, 85, 80, 78, 82 ℃, then add the concentration of 6g by every 100g glue solution and be 6mol / L of hydrochloric acid, reacted for 0.5h, cooled to 45°C to form glue, then added 3ml of epichlorohydrin per 100g of glue, reacted at 45°C for 1.3h, and obtained modified skin gelatin; followed by 1:8 The mass ratio of caustic soda is dissolved in water, and heated to boiling to completely dissolve the caustic soda to form a caustic soda solution, then slowly add rosin of the same quality as the caustic soda solution, and stir while adding, until the rosin is completely dissolved and becomes amber viscous After the reaction ends, the modified rosin is obtained, and water with 5 times the quality of the caustic soda solution is added to obtain a modified rosin emulsion; the modified gelatin and the modified rosin emulsion are stirred at room temperature in ...

Embodiment 2

[0007] Embodiment 2: first by the mass ratio of 1: 3.5, hide gelatin and water are jointly added in the reactor, be warmed up to 80 ℃, then add the hydrochloric acid that the concentration of 7g is 6mol / L by every 100g glue solution, react 0.8h, Cool down to 42°C to form glue, then add 4ml of epichlorohydrin per 100g of glue, react at 42°C for 1 hour to obtain modified skin gelatin; then dissolve caustic soda in water at a mass ratio of 1:10, And heated to boiling to completely dissolve the caustic soda to make a caustic soda solution, then slowly add rosin of the same quality as the caustic soda solution, and assist in stirring while adding, until the rosin is completely dissolved into an amber viscous liquid, the reaction is completed, and the modified Rosin, then add water with 4 times the mass of caustic soda solution to obtain a modified rosin emulsion; take the modified gelatin and the modified rosin emulsion at room temperature and stir them evenly at a mass ratio of 6:1...

Embodiment 3

[0008] Embodiment 3: at first by the mass ratio of 1: 4, skin gelatin and water are jointly added in the reactor, be warmed up to 80 ℃, then add the hydrochloric acid that the concentration of 8g is 6mol / L by every 100g glue solution, react 0.6h, Cool down to 40°C to form glue, then add 2.5ml of epichlorohydrin per 100g of glue, react at 40°C for 1.5h to obtain modified skin gelatin; then dissolve caustic soda in water, and heated to boiling to completely dissolve the caustic soda to make a caustic soda solution, then slowly add rosin with the same quality as the caustic soda solution, and assist in stirring while adding, until the rosin is completely dissolved into an amber viscous liquid, and the reaction is completed. Modified rosin, then add water with 4.5 times the quality of caustic soda solution to obtain modified rosin emulsion; get modified skin gelatin and modified rosin emulsion at room temperature and stir at a mass ratio of 5.2:1 to obtain a mixed glue, and then pr...

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Abstract

Disclosed is the preparation method of high intensity environmental-friendly gelatin; firstly, the gelatin and water are mixed, and then hydrochloric acid is added to the mixture to form gelatin liquid; epichlorohydrin is added to the gelatin liquid; modified gelatin is obtained; secondly, sodium hydroxide is melted in water to form sodium hydroxide solution; rosin is added to the sodium hydroxide solution to obtain modified rosin, and then water is added to obtain modified rosin emulsion; the modified gelatin and the modified rosin emulsion are stirred evenly to obtain the mixed gelatin liquid; and then borax, potassium thiocyanate and sepiolite powder are added to the mixed gelatin liquid; when the compositions are dispersed completely, the high intensity environmental-friendly gelatin which is white viscous liquid. The preparation method of the high intensity environmental-friendly gelatin processes degradation and chemical cross-linking towards the gelatin through the acid method firstly, and then prepares the high intensity environmental-friendly gelatin through the method of mixing the modified rosin emulsion and other fillers and auxiliary agents; the synthesis time is short; the adhesive strength is high; meanwhile, the drying speed is fast and the cost is low.

Description

technical field [0001] The invention relates to a preparation process of an adhesive, in particular to a preparation process of high-strength environment-friendly gelatin. Background technique [0002] As an adhesive, gelatin is widely used in the bonding of wood, paper, and fabrics. It is characterized by high bonding strength, good collapsibility, non-toxic, non-polluting, and low cost. However, the viscosity of skin gelatin changes in a wide range with temperature. As the temperature drops, the viscosity rises sharply, which affects the fluidity of the rubber material and brings insurmountable difficulties to the control and operation of industrialized mass production. Because it is inconvenient to use, it needs to be boiled on site, and the drying speed is slow, so it is gradually replaced by synthetic adhesives. Contents of the invention [0003] The purpose of the present invention is to overcome the above-mentioned shortcoming of skin gelatin, provide a kind of pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J189/06C09D193/04
Inventor 朱雷李仲谨余丽丽张莎邱辉丁金皓陈红海王培霖李铭杰杨威姚宝晶陈帅帅何萍
Owner SHAANXI UNIV OF SCI & TECH
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