Oxidized Starch (Surface Sizing Grade)
CAS Number: 65996-62-5
Oxidized starch is a chemically modified starch produced by oxidation with hypochlorite, giving it lower viscosity and better film-forming properties than native starch. It is widely used as a surface sizing agent applied at the size press or film press of paper machines. Oxidized starch improves surface strength, printability, and smoothness of paper and board.
Technical Specifications
| appearance | White to off-white powder |
| pH (5% solution) | 5.5–7.5 |
| carboxyl content (%) | 0.5–1.5 |
| moisture content (%) | ≤ 13 |
| viscosity (10% paste, 50°C, mPa·s) | 30–200 |
Applications
- Surface sizing at size press and film press
- Coating binder in lightly coated paper grades
- Surface strength improvement for offset printing paper
- Corrugating starch adhesive component
- Surface treatment for newsprint and directory paper
Key Features
- Lower viscosity allows higher solids application at size press
- Better film formation and surface coverage than native starch
- Improves IGT pick resistance and surface strength
- Easy to cook and dissolve; stable solution viscosity
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CAS Number
65996-62-5
Category
Paper / Pulp ChemicalsAvailability
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