Photolabile latex for the release of perfumes

A polymer microparticle capable of releasing in a controlled manner a perfuming aldehyde or ketone, said polymer microparticle comprising:

• a) at least one repeating unit of formula
• wherein A represents a benzene-1,4-diyl or a benzene-1,3-diyl moiety, and R is a CH(R′)(R″) group corresponding to a C6-20 perfuming aldehyde or ketone of formula (R′)(R″)C═O;
• b) optionally at least one repeating cross-linking unit of formula
• wherein all x are simultaneously either 0 or 1, y is 2, 3 or 4;
• R1 represents a C2-12 hydrocarbon di-, tri- or tetra-radical (depending on the value of y) optionally comprising from 1 to 5 oxygen atoms;
• and
• R2 represents a hydrogen atom or a methyl group;
• alternatively, the repeating cross-linking unit is of formula
• c) optionally at least one repeating unit of the formulae
• wherein L is an oxygen atom or a NH group, B represents a COOR4 group, a C6H5, a C6H4COOR4, a OR4, a R4COO, a CON(R4)2, or a 2-oxopyrrolidin-1-yl or a 2-oxoazepan-1-yl group and each R3 is a hydrogen atom or a methyl group, and each R4 represents a hydrogen atom, a C1-4 alkyl group or a (C2H4O)qR3 group, with q being an integer varying between 1 and 10;
• provided that at least 2% w/w of the whole repeating unit of formula (I) are units wherein R is a CH(R′)(R″) group corresponding to a C6-20 perfuming aldehyde or ketone of formula (R′)(R″)C═O.