Patent ID: 8557378

Claim:
An adhesive tape comprising: a backing layer comprising (1) a first acrylic copolymer comprising a first polymerized product of a first polymerizable reaction mixture comprising (a) a first crosslinker having at least two (meth)acryloyl groups in an amount up to 70 weight percent based on a total weight of polymerizable material in the first polymerizable reaction mixture; and (b) either (i) a first monovalent monomer mixture comprising 1) a low Tg yielding acrylic monomer in an amount equal to at least 40 weight percent based on the total weight of polymerizable material in the first polymerizable reaction mixture, wherein the low Tg yielding acrylic monomer has a glass transition temperature no greater than 20° C. when polymerized to form a homopolymer; and 2) a first polar monomer in an amount up to 35 weight percent based on the total weight of polymerizable material in the first polymerizable reaction mixture; or (ii) a partially polymerized product of the first monovalent monomer mixture; and a first pressure-sensitive adhesive layer that is adjacent to a first major surface of the backing layer and a second pressure-sensitive adhesive layer that is adjacent to a second major surface of the backing layer, wherein the first pressure-sensitive adhesive layer and the second pressure-sensitive adhesive layer each comprise (1) a second acrylic copolymer that is different than the first acrylic copolymer, the second acrylic copolymer comprising a second polymerized product of a second polymerizable reaction mixture comprising (a) a second crosslinker having at least two (meth)acryloyl groups in an amount up to 25 weight percent based on a total weight of polymerizable material in the second polymerizable reaction mixture; and (b) either (i) a second monovalent monomer mixture comprising 1) an alkyl(meth)acrylate having an alkyl group with at least 4 carbon atoms in an amount equal to at least 40 weight percent based on the total weight of polymerizable material in the second polymerizable reaction mixture; and 2) a second polar monomer in an amount up to 40 weight percent based on the total weight of polymerizable material in the second polymerizable reaction mixture; or (ii) a partially polymerized product of the second monovalent monomer mixture; and (2) inorganic particles dispersed or suspended in the second acrylic copolymer in an amount up to 25 weight percent based on the total weight of second acrylic copolymer, wherein, the adhesive tape is stretch releasing and is stretchable at least 50 percent in a first direction without breaking.