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8 results about "Modified starch" patented technology

Modified starch, also called starch derivatives, are prepared by physically, enzymatically, or chemically treating native starch to change its properties. Modified starches are used in practically all starch applications, such as in food products as a thickening agent, stabilizer or emulsifier; in pharmaceuticals as a disintegrant; or as binder in coated paper. They are also used in many other applications.

Physical oxidative carboxymethyl composite modified starch and preparation method thereof

InactiveCN104592404AHigh degree of substitutionWill not swell and dissolveSodium chloroacetateDissolution
The present invention relates to technical field of modified starch and provides physical oxidative carboxymethyl composite modified starch and a preparation method thereof. The modified starch is prepared from the following raw materials: raw starch, alcohol, inorganic alkali, sodium chloroacetate, hydrochloric acid and hydrogen peroxide. According to the carboxymethyl composite modified starch provided by the invention, the process steps of firstly mechanically activating the raw starch, etherifying the carboxymethyl and then carrying out hydrogen peroxide oxidation are adopted; therefore, the proportion of alcohol and water in a carboxymethylation reaction segment system can be favorably controlled to avoid expansion and dissolution of starch granules, so as to ensure high substitution ratio of the prepared product; in addition, due to the process operation of first etherification and then oxidation, the product viscosity can be controlled more accurately. The preparation method of the carboxymethyl composite modified starch provided by the invention can be used for preparing carboxymethyl starch with high substitution ratio and low viscosity by using mechanically activated corn, cassava and waxy maize starch as raw materials, the operation is convenient, the process flexibility is strong, the continuity is good, the utilization rate of equipment is high and the production efficiency is high.
Owner:HENAN HENGRUI STARCH TECH CO LTD

Preparation method of coated slow-release granular pesticide

InactiveCN104719323ARelease time can be controlledRemarkable insecticidal effectBiocideAnimal repellantsStarch gelatinizationActive component
The invention discloses a preparation method of a coated slow-release granular pesticide. The preparation method is characterized by comprising 1, starch gelatinization, 2, active component addition, 3, powdery additive addition, and 4, granulation. The coated slow-release granular pesticide contains two insecticidal components such as imidacloprid and toosendanin and has substantial insecticidal effects. The preparation method utilizes modified starch gelatinization and coating of a polymer film on surfaces of fertilizer particles. The powdery additive can make the pesticide extruded pellet composition stable and form a lot of minimal pores. The coated slow-release granular pesticide has controllable adsorption capability and pesticide release time so that a pesticide release speed is greatly reduced.
Owner:QINGDAO XINRUNTU NURSERY STOCK SPECIALIZED COOP
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