Multilayer pressure sensitive adhesive foam tape for outdoor applications

A method of adhering a first part to a second part, wherein the first part and the second part are used for outdoor applications and comprise a thermoplastic or a thermosetting organic polymer, and wherein the method comprises the steps of:

• a) providing a multilayer pressure sensitive adhesive foam tape comprising:
• i. a polymeric foam layer comprising two major surfaces;
• ii. a first pressure sensitive adhesive layer adjacent to one major surface of the polymeric foam layer;
• iii. a second pressure sensitive adhesive layer adjacent to the polymeric foam layer on the major surface which is opposed to the major surface or the polymeric foam layer adjacent to the first pressure sensitive adhesive layer, and wherein the first pressure sensitive adhesive layer, the polymeric foam layer and the second pressure sensitive adhesive layer are superimposed;
• b) adhering the first pressure sensitive adhesive layer to the first part;
• and
• c) adhering the second part to the second pressure sensitive adhesive layer;
• wherein the first pressure sensitive adhesive layer has a composition selected from:
• A) composition (1) comprising:
• a) 60 parts by weight or greater of a low Tg (meth)acrylate copolymer (component) comprising:
• i. C1-C32 (meth)acrylic acid ester monomer units;
• ii. optionally, acid functional ethylenically unsaturated monomer units;
• iii. optionally, non-acid functional, ethylenically unsaturated polar monomer units;
• iv. optionally, vinyl monomer units;
• and
• v. optionally, multifunctional (meth)acrylate monomer units, and
• b) up to 40 parts by weight of a high Tg (meth)acrylate copolymer having a weight average molecular weight (Mw) of above 20,000 Daltons, and comprising:
• i. high Tg (meth)acrylic acid ester monomer units;
• ii. optionally, acid functional ethylenically unsaturated monomer units;
• iii. optionally, low Tg (meth)acrylic acid ester monomer units;
• iv. optionally, non-acid functional, ethylenically unsaturated polar monomer units;
• v. optionally, vinyl monomer units;
• vi. optionally, a chlorinated polyolefinic (co)polymer;
• and
• c) optionally, up to 20 parts by weight of a hydrogenated hydrocarbon tackifier, based on 100 parts by weight of copolymers a) and b);
• and wherein the second pressure sensitive adhesive layer has a composition selected from:
• B) composition (2) comprising:
• a) a linear block copolymer of the formula R-(G)m, wherein m is 1 or 2;
• b) a multi-arm block copolymer of the formula Qn-Y, wherein:
• i. Q represents an arm of the multi-arm block copolymer and each arm independently has the formula G-R,
• ii. n represents the number of arms and is a whole number of at least 3;
• and
• iii. Y is the residue of a multifunctional coupling agent;
• wherein each R is a rubbery block comprising a polymerized conjugated diene, a hydrogenated derivative of a polymerized conjugated diene, or combinations thereof;
• and each G is a glassy block comprising a polymerized monovinyl aromatic monomer;
• c) a first high Tg tackifier having a Tg of at least 60 degrees C., wherein the first high Tg tackifier is primarily compatible with the rubbery blocks;
• d) a second high Tg tackifier having a Tg of at least 60 degrees C., wherein the second high Tg tackifier is primarily compatible with the glassy blocks;
• and
• e) at least one component selected from the group consisting of a low Tg tackifier, a plasticizer, and combinations thereof.