Patent ID: 8383750

Claim:
A perfuming composition comprising: i) as perfuming ingredient, at least one polymethacrylate co-polymer obtainable by a process comprising the co-polymerization of at least one monomer (M) of formula wherein a is 0; a) P represents a radical susceptible of generating an odoriferous α,β-unsaturated ketone, aldehyde or carboxylic ester and is represented by formula in which formula the wavy line indicates the location of the bond between said P and X and the dotted lines represent a single or double bond, R 10 indicating a methyl or ethyl group and R 11 representing a C 6 to C 9 linear or branched alkyl, alkenyl or alkadienyl group; b) X represents an oxygen atom; and c) R represents a methyl group; and at least a monomer (H) of formula: wherein R 14 represents a hydrogen atom or a methyl group; R 17 represents an alkali metal atom or a hydrogen atom or a R 15 R 15 represents an acetate or propionate group, a group of formula —(CH 2 ) q —W, or a group of formula —(CH 2 CH 2 O) x —CH 2 (CH 2 ) x W, q representing an integer from 2 to 12, x representing an integer from 0 to 2 and W representing a functional group selected from the group consisting of COOY, NR 18 2 and NR 18 3 D; R 18 being a hydrogen atom or a methyl or ethyl group and Y being a hydrogen or an alkali metal atom, D being a monoanion, and wherein the molar ratio between the total amount of monomer (M) and the total amount of monomer (H) is between 1/6 and 1/1; ii) at least one ingredient selected from the group consisting of a perfumery carrier and a perfumery base; and iii) optionally at least one perfumery adjuvant.