| 摘要 |
1,268,802. Coating. SANDOZ Ltd. 11 March, 1969 [15 March, 1968; 30 Aug., 1968], No. 12785/69. Heading B2E. [Also in Divisions C2, C3, Dl and D2] The brightening effect produced by optical brightners on organic substrates is nullified by incorporating an acid addition salt or quaternization product of a cyclic amidine of formula: where Y is an alkylene chain of 2, 3 or 4 carbon atoms, R 1 is hydrogen, alkyl, aryl or aralkyl with up to 7 carbon atoms and X is hydrogen or or of a polycondensation product containing units of formula I above in which R 1 is an alkylene chain with up to 8 carbon atoms, and X is -CO-NH- or It is possible to incorporate an extinguishing agent, particularly: in a coating mass, particularly of starch. |
