| abstract |
Mannich condensation products prepared by the condensation of a compound having the formula :n nwherein R is hydrogen, lower alkyl having 1 through 6 carbon atoms, hydroxy or lower alkoxy having 1 through 6 atoms ; R 1 is polyalkyl having an average molecular weight of about from 400 to 5000 and n is 0 or a whole integer of from 1 through 10 with ammonia, alkylamine, polyamine and an aldehyde. n The condensation products and their fuel-soluble salts are useful as fuel additives for the prevention and control of engine deposits. |