Multilayer pressure-sensitive adhesive construction
US6416858B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 14, 1997 |
| Grant date | Jul 9, 2002 |
| Priority date | — |
| Expiry date | Mar 14, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2891
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention is directed toward multilayer pressure-sensitive adhesive constructions with improved convertibility and aging. In one embodiment, the multilayer constructions have one layer formed of a first adhesive composition having a first glass transition temperature, and also having a tangent delta greater than about 0.5 at 102 radians per second at 20° C., and a storage modulus greater than about 3×108 dynes/cm2 at 104 radians per second at 20° C. At least a second adhesive layer is provided in the construction, the second adhesive layer comprising a second adhesive composition with a second glass transition temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.