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Cooked gelatine powder and preparation method thereof

A technology of cooked rubber powder and starch, applied in the direction of starch-derived adhesives, adhesive types, adhesive additives, etc., can solve the problems of low reaction efficiency, uneven reaction of cooked rubber powder, low degree of substitution, etc., and achieve utilization High efficiency, improved reaction efficiency and substitution degree, high substitution effect

Active Publication Date: 2013-06-05
山东国九堂制药集团股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Aiming at the defects of non-uniform reaction, low reaction efficiency and low degree of substitution in the preparation of cooked rubber powder by the current dry method, the present invention proposes a cooked rubber powder and a preparation method thereof

Method used

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  • Cooked gelatine powder and preparation method thereof
  • Cooked gelatine powder and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1) Thin and activate 85 parts of corn starch and 2 parts of sodium alginate in a microcomputer to refine the original starch to 2000 mesh, destroying the starch crystal structure, and the structure of starch granules changes from a crystalline structure to a non-crystalline structure. Crystal structure transformation, effectively increasing the surface area of ​​starch granules, and making the exposed hydroxyl groups of starch active without recrystallization through modifiers;

[0035] 2) Add the activated starch obtained in step 1) and 8 parts of potassium hydroxide into the mixing reactor, set the temperature of the mixer at 80°C, the stirring speed at 2000 rpm, and high-speed stirring for 5 minutes. Under this condition, the starch unit The exposed hydroxyl groups on C2, C3 and C6 undergo condensation reaction with potassium hydroxide, so that the starch non-crystalline structure is completely in an active state, and the reaction process is: St-OH+KOH→St-OK+H 2 O; ...

Embodiment 2

[0041] 1) Thinning and activating 50 parts of potato starch, 30 parts of corn starch, 2 parts of polyvinyl alcohol and 2 parts of sodium polyacrylate in a microcomputer to refine the original starch to 2000 mesh, destroying the starch crystal structure, The structure of starch granules changes from a crystalline structure to an amorphous structure, effectively increasing the surface area of ​​the starch granules, and making the exposed hydroxyl groups of the starch active without recrystallization;

[0042] 2) Add the activated starch obtained in step 1) and 6 parts of potassium hydroxide into the mixing reactor, set the temperature of the mixer at 80°C, the stirring speed at 2000 rpm, and high-speed stirring for 8 minutes. Under this condition, the starch unit The exposed hydroxyl groups on C2, C3 and C6 undergo condensation reaction with potassium hydroxide, so that the starch non-crystalline structure is completely in an active state, and the reaction process is: St-OH+KOH→S...

Embodiment 3

[0048] 1) 70 parts of 200-mesh tapioca starch and 5 parts of polymaleic anhydride were refined and activated in a SLG300 vortex jet mill to 1250 mesh;

[0049] 2) Add the activated starch obtained in step 1) and 5 parts of sodium hydroxide catalyst into a high-speed mixing reactor, set the temperature of the mixer to 80°C, stir at a speed of 1400 rpm, and react with high-speed stirring for 10 minutes;

[0050] 3) Set the temperature of the mixing reactor in step 2) at 100°C, add 10 parts of etherifying agent while stirring at a high speed, keep the temperature of the mixing reactor at a constant temperature of 100°C, and react for 15 minutes at a stirring speed of 1400 rpm. Then add 2 parts of thickener hydroxyethyl cellulose and 0.5 parts of sodium bentonite and continue to stir for 1-2 minutes to disperse evenly, then discharge and cool;

[0051] 4) The material obtained in step 3) is fed into the enhanced extrusion reactor, and the starch hydrogen bond is broken and disinte...

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Abstract

The invention relates to cooked gelatine powder and a preparation method thereof. The cooked gelatine powder comprises the following components in parts by weight: 70-85 parts of starch, 2-5 parts of a modifier, 3-8 parts of a catalyst, 5-15 parts of an etherifying agent, 2-3 parts of a thickening agent and 0.5-1 part of a nucleater. The method comprises the following steps: carrying out refining and activating treatment in advance and an instantaneous high-temperature and high-pressure etherification reaction on starch; and carrying out powerful shearing in short time under conditions of a dry method to achieve the purpose that etherification reaction is quick and the starch is not degraded to obtain the cooked gelatine powder. The obtained cooked gelatine powder is uniform in reaction, high in reaction efficiency and substitution degree, fluffy, good in instant dissolving in cold water, low in preparation cost, small in investment of production equipment and capable of absorbing water quickly without generating an inclosure and achieving efficient preparation.

Description

technical field [0001] The invention relates to a building material adhesive and a preparation method, in particular to a cooked rubber powder adhesive and a preparation method using a dry reaction. Background technique [0002] Adhesives are an indispensable material for architectural decoration, and there are more and more varieties. At present, there are construction glue (polyvinyl alcohol), redispersible latex powder, white latex, starch adhesive, etc. Among them, starch adhesives have been accompanied by the development of construction adhesives due to their unique adhesiveness, low cost, non-toxic and environmental protection, and have gradually evolved from the initial pregelatinized starch to modified starches such as starch ether and oxidized starch. With the in-depth research on modified starch, its adhesive performance has been continuously improved. As a modified starch with excellent performance, cooked rubber powder has good cold water instant solubility, adh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J103/08C09J11/08C09J11/04C08B31/12C09D5/34
Inventor 陈庆曾军堂
Owner 山东国九堂制药集团股份有限公司
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