Patent ID: 8784984

Claim:
A microcapsule comprising A) a core containing a hydrophobic liquid or wax in an amount of 45 to 94% by weight of the total weight of the microcapsule, B) the polymeric shell having an outer surface and an inner surface, wherein the polymeric shell comprises, a) a polymer formed from a monomer mixture containing: i) 1 to 95% by weight of a hydrophobic mono functional ethylenically unsaturated monomer, wherein the hydrophobic mono functional ethylenically unsaturated monomer is C 1 to C 12 alkyl esters of acrylic acid, C 1 to C 12 alkyl esters of methacrylic acid, styrene or derivatives of styrene, or esters of mono ethylenically unsaturated carboxylic acids, ii) 5 to 99% by weight of a polyfunctional ethylenically unsaturated monomer, wherein the polyfunctional ethylenically unsaturated monomer is divinyl benzene, ethoxylated bisphenol A diacrylate, propoxylated neopentyl glycol diacrylate, tris(2-hydroxyethyl) isocyanurate triacrylate, trimethylolpropane triacrylate, or an alkane diol diacrylate, and iii) 0 to 60% by weight of other mono functional monomer, in which components (i), (ii) and (iii) total 100%, wherein the polymer is present in an amount of 5 to 50% by weight of the total weight of the microcapsule, and b) a further hydrophobic polymer which is insoluble in the hydrophobic liquid or wax, wherein the further hydrophobic polymer is C 1 to C 12 alkyl esters of acrylic acid, C 1 to C 12 alkyl esters of methacrylic acid, styrene or derivatives of styrene, or esters of mono ethylenically unsaturated carboxylic acids, wherein the further hydrophobic polymer is present in an amount of 0.05 to 10% by weight of the total weight of the microcapsule, and wherein the hydrophobic liquid or wax, polymer formed from the monomer mixture and the further hydrophobic polymer total 100% by weight of the total weight of the microcapsule.