What is alumina trihydrate used for?
What is alumina trihydrate used for?
Alumina trihydrate is used as a flame retardant both within and outside the U.S. in the interiors of automobiles, commercial upholstered furniture, draperies, wall coverings and carpets (R.C. Kidder, Flame Retardant Chemical Association, unpublished material, April 21, 1998).
What is alumina trihydrate ATH?
Alumina Trihydrate (AI2O3•3H2O) is the most widely used flame retardant in the world due to its versatility and low cost. Available in different particle sizes, it can be used in a wide range of polymers at processing temperatures below 220°C. ATH is non-toxic, halogen-free, chemically inert, and has low abrasiveness.
Is alumina a trihydrate?
A white, translucent powder that is also called aluminum hydroxide. Alumina trihydrate is obtained from Bauxite. Alumina trihydrate is used commercially as a paper coating, flame retardant, water repellant, and as a filler in glass, ceramics, inks, detergents, cosmetics, and plastics.
What chemical is Ath?
Alumina Trihydrate
The two most widely used products are Alumina Trihydrate, also known as ATH or by its chemical composition, Al(OH)3 and Magnesium Hydroxide, known as MDH or by its chemical composition Mg(OH)2.
How is alumina trihydrate used in composites?
The use of microsized Alumina Trihydrate (ATH) as the additive in the formulations is to reduce the hygroscopic tendency of the composites. Thus, this suitability of microsized ATH as an additive could be a potential material used for plastic encapsulation for electronic packaging applications.
Why is bauxite found in tropical areas?
What is Bauxite? Many people are surprised to learn that bauxite is not a mineral. It is a rock composed mainly of aluminum-bearing minerals. It forms when laterite soils are severely leached of silica and other soluble materials in a wet tropical or subtropical climate.
How common is bauxite?
Bauxite reserves are estimated to be 55 to 75 billion metric tons, primarily spread across Africa (32 percent), Oceania (23 percent), South America and the Caribbean (21 percent) and Asia (18 percent). The United States has small amounts of bauxite ore located in Arkansas, Alabama and Georgia.
What is a trihydrate?
Medical Definition of trihydrate : a chemical compound with three molecules of water.
What is ATH filler?
It is a white filling material that provides flame retardant and self-extinguishing properties for polyester resins and gelcoats. It exposes water molecules within the body at high temperatures to reduce flame spread and smoke formation.
How is Ath made?
ATH is made from bauxite ore, a natural material that is the main source of aluminum. The ore, according to LKAB Materials, is refined to a powder using the Bayer Process. From there, the powder is used to create a variety of alumina chemicals.
What is flame retardant properties?
Flame retardants are chemicals that are applied to materials to prevent the start or slow the growth of fire. They have been used in many consumer and industrial products since the 1970s, to decrease the ability of materials to ignite. Flame retardants are often added or applied to the following products.
Why is bauxite used in aluminum foil?
Bauxite is refined to make a pure aluminum oxide call alumina. The alumina is charged with an electrical current. This process is known as electrolytic reduction. In recent years it has become popular to add a variety of aluminum alloys engineered to add strength and reduce the thickness of the aluminum foil.
What kind of applications can alumina trihydrate be used for?
Alumina Trihydrate (ATH) A Versatile Pigment for Coatings, Inks, Adhesives, Caulks, Sealants, Potting and Encapsulating Applications Huber’s Alumina Trihydrate (ATH)
Which is a synonym for alumina trihydrate ( ATH )?
Synonyms for ATH you might be familiar with include: 4 Hydrated Alumina 4 Aluminum Hydroxide 4 Aluminum Trihydroxide ATH is an extremely functional and versatile pigment and useful in a number of coatings, inks, adhesives, caulks and sealants applications.
Why is alumina trihydrate ( ATH ) an inert functional pigment?
Because ATH is an inert functional pigment available in a wide array of particle size distributions, it offers a number of key features and benefits: Features Benefits
How does flame retardance work on alumina trihydrate?
Dehydration at 428°F Flame retardance (220°C) Smoke suppression High brightness Extends titanium dioxide (TiO2) and colors without darkening Median particle size: Reduces or maintains gloss, depending on the particle size 1 micron to 80 microns Good anti-settling characteristics Hegman grind values as high as 7