Pressure sensitive adhesive products and the method for preparation of the same
US4425176A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 19, 1982 |
| Grant date | Jan 10, 1984 |
| Priority date | — |
| Expiry date | Mar 19, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31928
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Pressure sensitive adhesive products or articles having one or more release layers and a pressure sensitive adhesive layer, said one or more release layer comprising a polyolefinic elastomer having a shearing modulus of less than 2.0.times.10.sup.8 dyne/cm.sup.2 and surface wettability expressed in terms of an equilibrium contact angle of more than 55.degree. with respect to a standard liquid, and said adhesive layer being composed mainly of a polyacrylate. To increase the adhesion between the release layer and a backing substrate, a reinforcing interlayer may be used. As the release layer, a mixture of the polyolefinic elastomer and polyethylene may be used. The release layer is then kept in contact with the adhesive layer over a given area to form a composite or integral layer thereof as by extrusion coating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.