Adhesive articles including a cushion layer and a continuous shell layer
US11118088B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 14, 2018 |
| Grant date | Sep 14, 2021 |
| Priority date | — |
| Expiry date | Dec 14, 2038 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2891
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An adhesive article including: a flexible backing; a first cushion layer permanently bonded to a first surface of the flexible backing, wherein the first cushion layer: has an average thickness of at least 10 micrometers; and includes an acrylate pressure-sensitive adhesive having a Fox Tg of up to −30° C., wherein the acrylate pressure-sensitive adhesive includes a (meth)acrylate copolymer; and a first continuous shell layer adjacent the first cushion layer, wherein: the first continuous shell layer has an average thickness of up to 25 micrometers; the ratio of the first cushion layer average thickness to the first shell layer average thickness is at least 2:1; the first continuous shell layer includes an adhesive having a Fox Tg of −20° C. to +50° C.; and the first continuous shell layer adhesive includes a copolymer having a weight average molecular weight of at least 100,000 Daltons.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.