Patent ID: 6989192

Claim:
A pressure sensitively adhesive composition comprising: i) A pressure sensitively adhesive polyacrylate having functional groups, and ii) crosslinked polymer particles having functional groups, wherein the functional groups of the particles are capable of coupling with the functional groups of the polyacrylate adhesive, said polyacrylate being formed from a monomer mixture comprising at least the following components: (a) from 60 to 99% by weight of one or more monomers selected from the group consisting of acrylic acid derivatives and methacrylic acid derivatives of the formula CH 2 ═CH(R 1 )(COOR 2 ) (I) where R 1 is H or CH 3 and R 2 is an alkyl chain having from 1 to 20 carbon atoms, (b) from 1 to 10% by weight of one or more monomers selected from the group consisting of vinyl monomers, acrylic monomers, and methacrylate monomers, containing a group X capable of chemical coupling, and said polymer particles containing at feast two functional groups Y, and Z, which are capable of chemical coupling with the functional group X in the form of a substitution or addition reaction.