Multilayer PSA construction exhibiting reduced tackifier migration

A multilayer PSA construction comprising:

• a. a facestock having an inner and an outer surface;
• b. a face side adhesive (FSA) in contact with the inner surface of the facestock, formed of
• i. a continuous phase of at least one butadiene-based elastomer,
• ii. a discontinuous phase of at least one isoprene-based elastomer, and
• iii. a tackifying system that is preferentially soluble in the discontinuous phase of the FSA;
• and
• c. a liner side adhesive (LSA) in contact with the FSA, formed of at least one tackified elastomer.

A multilayer PSA construction, comprising:

• a. a facestock having an inner and an outer surface;
• b. a face side adhesive (FSA) in contact with the inner surface of the facestock, the FSA being formed of a first tackified blend of at least two immiscible elastomers provided in relative proportions such that the FSA has a continuous phase and a discontinuous phase, and wherein the first tackified blend of elastomers further comprises at least one tackifier that is preferentially soluble in the discontinuous phase of the FSA;
• and
• c. a liner side adhesive (LSA) in contact with the FSA, the LSA being formed of a second tackified blend of at least two immiscible elastomers provided in relative proportions such that the LSA has a continuous phase and a discontinuous phase, and wherein the second tackified blend of elastomers further comprises at least one tackifier that is preferentially soluble in the continuous phase of the LSA.

A multilayer PSA construction, comprising

• a. a facestock having an inner surface and an outer surface,
• b. a face side adhesive (FSA) in contact with the inner surface of the facestock, formed of
• i. a continuous phase of SBS and/or SB block copolymers,
• ii. a discontinuous phase of SIS and/or SI block copolymers, and
• iii. about 50% to 80% by weight of a first tackifying system, based on the total weight of the block copolymers and the first tackifying system, wherein the first tackifying system is preferentially soluble in the discontinuous phase of the FSA;
• and
• c. a liner side adhesive (LSA) in contact with the FSA, formed of a miscible blend of
• (i) SBS and/or SB block copolymers, and
• (ii) SIS and/or SI block copolymers, tackified with a second tackifying system.