Patent ID: 8349452

Claim:
A microcapsule comprising: (A) in a range from 50 to 95 parts by weight, lipophilic core material which has a solid/liquid phase transition in a temperature range from −20 to 120° C.; (B) in a range from 4 to 50 parts by weight, capsule wall; and (C) in a range from 0.01 to 10 parts by weight, at least one colored or color-imparting substance selected from the group consisting of an oil-soluble dye and an oil-soluble brightener, wherein data in parts by weight are based on total weight of the microcapsule in question, and wherein the capsule wall (B) is a (co)polymer comprising, in reacted form: 30 to 100% by weight of at least one monomer (monomer I), selected from the group consisting of acrylic acid, methacrylic acid, maleic acid, and a C 1 -C 24 -alkyl ester of (meth)acrylic acid; 0 to 70% by weight at least one bi- or polyfunctional monomer (monomer II), which is or are insoluble or sparingly soluble in water; and 0 to 40% by weight at least one other monomer (monomer III) which is at least one monomer selected from the group consisting of vinyl acetate, vinyl propionate, vinylpyridine, styrene, α-methylstyrene, itaconic acid, 2-hydroxyethyl acrylate, methacrylate, acrylamido-2-methylpropanesulfonic acid, methacrylamide, N-vinylpyrrolidone, N-methylolacrylamide, N-methylolmethacrylamide, N,N-dimethyl-aminoethyl methacrylate and diethylaminoethyl methacrylate, wherein data in % by weight are based on total weight of the capsule wall (B).