Title:
MULTILAYER PSA CONSTRUCTION EXHIBITING REDUCED TACKIFIER MIGRATION
Document Type and Number:
WIPO Patent Application WO2000017285
Kind Code:
A9
Abstract:
A multilayer PSA construction includes a facestock, a hazy, first adhesive layer adjacent the facestock, and a PSA layer adjacent the first adhesive layer, and is protected until use by a release liner. The first adhesive layer includes an immiscible blend of a first elastomer having a first glass transition temperature and forming a continuous phase, and a second elastomer forming a discontinuous phase. The second elastomer has a glass transition temperature greater than the first glass transition temperature. The first adhesive layer also contains a tackifying component, which is preferentially soluble in the discontinuous phase. The PSA layer has a composition different from the first adhesive layer and is formed of at least one tackified elastomer that provides a measurable third maximum glass transition temperature, which is less than the second glass transition temperature. The multilayer PSA construction exhibits reduced migration of tackifiers and plasticizers over time.
Inventors:
KO CHAN U (US)
CHUANG HSIAO K (US)
UGOLICK RONALD (US)
CHUANG HSIAO K (US)
UGOLICK RONALD (US)
Application Number:
PCT/US1999/022101
Publication Date:
August 17, 2000
Filing Date:
September 23, 1999
Export Citation:
Assignee:
AVERY DENNISON CORP (US)
KO CHAN U (US)
CHUANG HSIAO K (US)
UGOLICK RONALD (US)
KO CHAN U (US)
CHUANG HSIAO K (US)
UGOLICK RONALD (US)
International Classes:
C09J7/22; C09J7/38; C09J153/00; C09J153/02; C08L53/02; (IPC1-7): C09J7/02; C09J153/02
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