Chemical name: Pyrromelletic Acid Diphenyl Imidazoline Salt (1:2)
CAS number: 54553-91-2
Description and features
Vicura MC-55 (Pyrromelletic Acid Diphenyl Imidazoline Salt 1:2) is an off-white powder with the following chemical formula: C10H6O8.2C9H10N2
The curing mechanism between Vicura MC-55 (Pyrromelletic Acid Diphenyl Imidazoline Salt 1:2) and the epoxy resin is complex. Two parallel processes are taking place; direct reaction between the imidazoline and the epoxy group and homopolymerization of the epoxy resin that is catalyzed by Vicura MC- 55. Compared to most of the powder coating systems where the optimal ratio between the crosslinker and the binder is close to the stoichiometric one, in the case of Vicura MC-55 the optimal ratio is generally determined empirically. For epoxy resins that are typically used for powder coatings (epoxy equivalent weights between 700 – 1000) amounts of 6,0 – 9,0 % of Vicura MC-31 are recommended as good starting.
Benzene-1,2,4,5-tetracarboxylic acid, compound with 4,5-dihydro-2-phenyl-1H-imidazole (1:2) is also known as Pyromellitic acid di(2-phenyl-2-imidazoline) salt (1:2).
|HS code||2933 2990|
Molecular and structural information
|Molecular weight||546.54 g/mol|
|Appearance||White or yellow fine powder|
|Melting range||220 - 245 ºC|
|Boiling point||>201 ºC|
|Bulk density||1.38 g/cm3 @ 20 ºC|
|Flash point||>250 ºC @ 1 atm|
|Melting point||±240 ºC at ± 1 atm|
|Partition coefficient (log Pow)||6.45 @ 25 ºC|
|Solubility in water||6 g/l @ 20 ºC / pH 3.8|
|Vapor pressure (MGM)||0 Pa @ 25 ºC|
Vicura MC-55 (Pyromellitic Acid Diphenyl Imidazoline Salt) is an organic salt of polycarboxylic acid and cyclic amidine. It is used as a crosslinker in manufacturing of matt epoxy and polyester/epoxy hybrid powder coatings. Vicura MC-55 can be used as a single crosslinker in formulating matt epoxy powder coatings where gloss of 20-25 (Gardner 600) is obtained. The gloss level can be increased by partially replacing Vicura MC-55 with the “high gloss crosslinker” Vicura MC-31. The desired ratio between the two crosslinkers should be determined experimentally. In polyester/epoxy powder coatings the gloss level is controlled by replacing part of the polyester with Vicura MC-55, while at the same time increasing the amount of epoxy resin. The curing reaction between Vicura MC-55 and the epoxy groups starts at temperatures above 180 ºC. ͦ By increasing the temperature the curing cycles are getting quickly in the range typical for other thermosetting powder coatings.
Available packaging: 20KG paper bags.
Special packaging is available on request.
Vicura MC-55 is regularly on stock in Europa and the USA. Our lead time is about one week if delivered in 20KG paper bags.
Store Pyrromelletic Acid Diphenyl Imidazoline Salt (1:2) in a cool, dry and well-ventilated area and in line with legal requirements.
This substance (CAS: 54553-91-2) has been registered under REACH (EC) 1907/2006.
A Material Safety Data Sheets (MSDS) is available for Vicura MC-55 and all other products supplied by Vesta Intracon BV. An MSDS describes the hazards of a product and explains how a product can be safely handled, used and stored. Besides it provides important regulatory and emergency response information for the purchased product.