Patent ID: 6514439
Filing Date: 2003-02-04
Classification: A01N,B01J,C08G,Y10T

Abstract:
A process for the production of microcapsules formed of a polyurea shell wall and containing an encapsulated ingredient or ingredients comprising incorporating into the shell wall an oligomeric acetal having the moiety in which R is (a) a moiety containing a chain of from 5 to about 40 optionally substituted carbon atoms, (b) a moiety containing a chain of from 4 to about 40 carbon atoms and one or more internally linked oxygen or sulfur atoms or â€”NHâ€” groups, or (c) an optionally substituted ethylene or propylene moiety; Z is (a) an optionally substituted phenyl group, (b) an optionally substituted C1-C20 alkyl 1, C2-C20 alkenyl, C3-C8 cycloalkyl or C5-C8 cycloalkenyl group; or (c) benzoyl; and n is 1 if R is (a) or (b), or is 2-20 if R is (c).