Scogin® LDH is a low–molecular weight sodium alginate polymer derived from brown seaweed. It is used as a thickener and gelling agent in industrial applications.
Scogin® LDH is a biodegradable alginate polymer derived from sustainably managed seaweed farms. Scogin® LDH is valued as a naturally sourced binder for several industrial applications, including coatings, inks, and adhesives. In these applications, Scogin® LDH may also function as an additive to provide thickening, gelling, and stability. When added to water at 1 wt%, Scogin® LDH forms solutions with a viscosity of 50–70 mPa·s. If calcium is introduced to this solution, an alginate-based gel will form.
Scogin® LDH has utility in several other industrial applications, including paper and board manufacturing, encapsulation, and water treatment. In wastewater treatment applications, Scogin® LDH is useful as a flocculant, where flocs and sediments created with Scogin® LDH can be treated as organic waste and are less expensive to dispose of. Scogin® LDH has excellent film-forming properties. Therefore, it is also useful in paper and board manufacturing, where it can be used for paper sizing applications or to form specialty coatings with a low propensity for ignition. It may also be used as a raw material in bioplastic fabrication. Scogin® alginates, like Scogin® LDH, can also entrap or encapsulate particles, oils, and liquids, making them effective encapsulating agents for active ingredients used in agriculture and other industrial processes.
Loss on drying (%): 10–15
pH (1% in water): 6.5–8.5
Viscosity (1% in water, mPa·s): 50–70
Particle size (25 mesh, % min): 99
Particle size (36 mesh, % min): 96
As (max): 3 mg
Pb (max): 5 mg
Hg (max): 1 mg
Cd (max): 1 mg
Total heavy metals (max): 20 mg
Naturally sourced and biodegradable sodium alginate polymer
Provides stability for emulsions, dispersions, and suspensions
Good solubility in both cold and hot water
Rheology modification and gel formation properties
Gelation triggered only by addition of calcium; no heat is required
Excellent film-forming properties
Improves flocculation performance when used with metal-based flocculants
Encapsulates active ingredients
Insufficient viscosity for coating, ink, and adhesive formulations
Instability within industrial emulsions, dispersions, and suspensions
Difficulty forming gels due to heating requirements
Reliance on fossil fuel–based additives and binders
Rheology modification and stabilization for coatings, inks, and adhesives
Encapsulation of agricultural and industrial active ingredients
Bioplastics development
Flocculation of wastewater
Paper sizing and coating
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