In the manufacture of thermosetting resins, pesticides, pharmaceuticals and dyestuffs.
제조 방법
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.
