| abstract |
A compound of the formula: n<CHEM>n where R is C6-24 arylene; m is 1 or 2; A is either O, S or CO2 (in which case m is 1) or N (in which case m is 2); n is an integer of from 2 to 400; x is an integer of from 1 to 6; and n.m.x </= 500. n<??>Such compounds can have utility as fugitive tints. They can be prepared by preparing an aromatic diazo compound in the presence of a strong mineral acid, preparing an alkylene oxide-containing compound, and coupling the two intermediates. |