White Dextrin For Foundry Industry
White Dextrins are a group of low-molecular-weight carbohydrates produced by the hydrolysis of starch[1] or glycogen. White Dextrins are mixtures of polymers of D-glucose units linked by α-(1→4) or α-(1→6) glycosidic bonds.
Dextrins can be produced from starch by applying dry heat under acidic conditions (pyrolysis or roasting). Dextrins produced by heat are also known as pyrodextrins. The starch hydrolyses during roasting under acidic conditions, and short-chained starch parts partially rebranch with α-(1,6) bonds to the degraded starch molecule.
White Dextrins are partially water-soluble, yielding optically active solutions of low viscosity. Most of them can be detected with iodine solution, giving a red coloration; one distinguishes erythrodextrin (dextrin that colours red) and achrodextrin (giving no colour).
Uses
- A textile finishing and coating agent to increase weight and stiffness of textile fabrics.
- A thickening and binding agent in pharmaceuticals and paper coatings
- A pyrotechnic binder and fuel; this is added to fireworks and sparklers, allowing them to solidify as pellets or "stars"
- A thickening and binding agent in pharmaceuticals and paper coatings
- A stabilizing agent for certain explosive metal azides, particularly Lead(II) azide
Packaging
Available in 50 Kg HDPE sacks with liners inside [Customised packing is also available]
Dextrins For Foundry Industry
Grodex Yellow Dextrin
Green strength binder for oils and in mould & Core (Foundry)
Grodex White Dextrin
Low viscosity partially soluble for mould & core (Foundry)