Wrinkle-resistant adhesive construction
US6511743B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 8, 2000 |
| Grant date | Jan 28, 2003 |
| Priority date | — |
| Expiry date | Nov 9, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2883
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.