Peroxide treated substantially amorphous polyolefins useful as pressure-sensitive adhesives
US4112208A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 6, 1977 |
| Grant date | Sep 5, 1978 |
| Priority date | — |
| Expiry date | Jul 6, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2666/34
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The invention relates to a process for the treatment of substantially amorphous polyolefins with peroxides at high temperatures to provide permanently tacky, low viscosity materials which have useful pressure-sensitive adhesive properties. These permanently tacky amorphous polyolefin homo- and copolymers, as well as blends of such amorphous polyolefins with crystalline polyolefins containing up to 20 weight percent crystalline polyolefin, are novel pressure-sensitive adhesives. These permanently tacky polymers are obtained, for example, by treating substantially amorphous polyolefins, such as amorphous polypropylene or amorphous propylene/1-butene copolymers, with peroxides at high temperatures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.