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Borates are of flame retardants that can be found as boric acid and a number of salts, particularly sodium borate (borax) and zinc borates.
One of the earliest flame retardants ever utilized was boric acid (H3BO3), along with the sodium salt known as borax. There are both major flame retardants and synergists in the boric acid/borate family.
Boric acid and ammonium borate types mostly work by the solid phase charring process and are particularly effective in cellulosic materials, which are easily charred.
Zinc borates are multipurpose flame retardants in which both the zinc and borate ingredients play a role. Their capabilities include the endothermic release of water, some gas phase activity in the presence of halogens, and the generation of a potent chemical reaction.
Zinc borate is widely used in halogen systems as a partial replacement for antimony oxide, potentially enabling cost savings and frequently improving several elements of fire performance, notably smoke and afterglow suppression.
The Global Borates market accounted for $XX Billion in 2023 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2024 to 2030.
In a reactive PU adhesive with a specific caloric value of no more than 12 MJ kg1, Henkel claims to use ATH (72%) in polyurethane.
So that the sandwich bonds have better strength, the adhesive can be placed at a maximum density of 333 g m2. En 13501-1’s A2 classification standards can also be met by sandwich bonding made of metal outer layers and mineral wool panels.
The combination provides the same caloric value when ATH is partially replaced with zinc borate (68% ATH and 4% zinc borate), but it also satisfies the more exacting standards of the tube test (DIN 4102-1)