Hydroxypropyl starch ether-HPS

1. Chemical name: Hydroxypropyl starch ether

2. English name: Hydroxypropyl starch ether

3. English abbreviation: HPS

4. Molecular formula: C7H15NO3 Molecular mass: 161.20

5. Preparation method: Hydroxypropyl starch is a chemically modified starch, which is etherified by propylene oxide and starch to replace the hydroxyl group in the starch macromolecule structure to become a kind of etherified starch.

6. Physical properties: white (colorless) powder with good fluidity and good water solubility, its aqueous solution is transparent and colorless, and has good stability. It is stable to acid and alkali, the sintering temperature is lower than that of native starch, and the change of hot and cold viscosity is more stable than that of native starch. Mixing with salt and sucrose has no effect on viscosity. After etherification, both ice-melt stability and transparency were improved.

7. Chemical properties: the properties of starch derivatives with hydroxypropyl substituents, the glucose unit constituting starch has 3 hydroxypropyl groups that can be replaced, so products with different degrees of substitution can be obtained.

8. Technical indicators Appearance: white powder, easy to absorb moisture

Solubility: Can dissolve in water and become a transparent solution

Viscosity (5% aqueous solution, 20℃): 500-20000 mPa.s

PH value (2% aqueous solution): 8-10

9. Purpose

1) In the hydroxypropyl starch food industry, hydroxypropyl starch can be used as a thickening agent, hydroxypropyl starch can be used as a suspending agent, and hydroxypropyl starch can be used as an adhesive.

2) Hydroxypropyl starch paper industry: hydroxypropyl starch is used for internal sizing of paper, hydroxypropyl starch is used for surface sizing, hydroxypropyl starch makes printing ink bright, hydroxypropyl starch makes uniform, hydroxypropyl starch Make the film smooth, hydroxypropyl starch reduces ink consumption, and hydroxypropyl starch has a certain ability to pull hair.

3) Hydroxypropyl starch textile industry: hydroxypropyl starch can be used as warp size, hydroxypropyl starch can improve the abrasion resistance during weaving, hydroxypropyl starch and weaving efficiency, hydroxypropyl starch with high degree of substitution of hydroxypropyl starch Base starch can be used as printing paste.

4) Hydroxypropyl starch pharmaceutical industry: Hydroxypropyl starch can be used as a disintegrating agent for tablets, and hydroxypropyl starch can also be used as a plasma bulking agent.

5) Hydroxypropyl starch stabilizes the well wall, hydroxypropyl starch improves wellbore conditions, hydroxypropyl starch prevents collapse, and hydroxypropyl starch flocculates drill cuttings.

6) Hydroxypropyl starch daily chemical industry: hydroxypropyl starch is used in daily chemical industry and hydroxypropyl starch is used as binder, suspending agent and thickener in cosmetics or coatings.

7) Hydroxypropyl starch In addition, hydroxypropyl starch can also be used as a binder for building materials, a gelling agent for hydroxypropyl starch coatings or organic liquids, and hydroxypropyl starch.

8) Food industry: It can be used as adhesive, thickener, suspending agent to increase stability.