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BayGranite™ is an inorganic hydrated alumina designed for use in polymer systems as a flame retardant and smoke supressive additive. BayGranite® 17 is more accurately designated chemically as aluminum trihydroxide, Al(OH)3, and is produced through processing of alumina-bearing feedstocks. Although BayGranite® 17 is a dry powder, when heated above approximately 220°C it decomposes into approximately 35% water and 65% alumina by weight. BayGranite®17 is a nonabrasive, low density material with a Mohs hardness index of 2.5 - 3.5 and a specific gravity of 2.42. Almatis BayGranite®17 ATH is compatible with polymer systems, and is designed for applications that require low-soda ATH products.

Functions: Flame Retardant

Chemical Family: Aluminum Compounds

Compatible Polymers & Resins: Ethylene Vinyl Acetate (EVA), Polyurethanes (PU), Polyvinyl Acetate (PVA), Polyvinyl Chloride (PVC), Synthetic Rubbers

Labeling Claims: Halogen-free

Features: Smoke Suppressant

Technical Data Sheet
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Knowde Enhanced TDS

Identification & Functionality

Chemical Family
CASE Ingredients Functions
CAS No.
21645-51-2
EC No.
244-492-7
Technologies

Features & Benefits

Labeling Claims
CASE Ingredients Features
Product Highlights

BayGranite®17 a non-halogenated fire retardant and smoke suppressant. It decomposes into an inert material: anhydrous alumina and water. Its presence in a polymer system can substantially lower smoke production levels when compared to flame retardant polymers based on phosphates or on brominated or chlorinated paraffin/ antimony trioxide filled systems.

Applications & Uses

Compatible Substrates & Surfaces
Applications

Primary applications are in the film forming binders based on polymers and copolymers. Ethylene vinyl acetate (EVA)

  • Natural latex
  • Polyurethane
  • Polyvinyl acetate (PVA)
  • Polyvinyl chloride (PVC)
  • Styrene-butadiene rubber (SBR)
  • Vinylidene Chloride

Properties

Physical Form
Chemical Properties
ValueUnitsTest Method / Conditions
Silicon Dioxide (SiO2)max. 0.01-0.02%
Iron Oxide (Fe2O3)max. 0.01-0.02%
Sodium Oxide (Na2O, total)max. 0.2-0.35%
Sodium Oxide (Na2O, soluble)max. 0.015-0.10%
Moisture Contentmax. 0.03-0.20%
Typical Properties
ValueUnitsTest Method / Conditions
Loose Bulk Density60-70lb/ft3
Specific Gravity2.42
Mohs Hardness2.5-3.5
Particle Size through 325 mesh60-65wt. %
Particle Size d5022-26μ