Chemical Properties
white crystalline powder
Uses
In the manufacture of thermosetting resins, pesticides, pharmaceuticals and dyestuffs.
Preparation
Benzoguanamine closely resembles melamine in that reaction with formaldehyde
gives methylol derivatives and then resinous condensates. Butylated
benzoguanamine-formaldehyde resins have found some use in surface
coatings. In a typical preparation, benzoguanamine (1 mole) is heated with
formalin (3 mole formaldehyde) at pH 8.3 and 70-80°C until the guanamine
has dissolved. n-Butanol (9 mole) and a small amount of hydrochloric acid
are added and the azeotrope distilled off until removal of water is complete.
Like their melamine counterparts, butylated benzoguanamine-formaldehyde
resins are most commonly used in admixture with alkyd resins. The resulting
coatings are very similar to those based on melamine but they show improved
resistance to alkalis.
Flammability and Explosibility
Non flammable
