UV-curable acrylate coatings for food packaging
US6900252B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 11, 2001 |
| Grant date | May 31, 2005 |
| Priority date | — |
| Expiry date | Jun 22, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D4/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
There is provided a radiation-curable coating or packaging composition containing vinyl acrylate and one or more additional components, wherein the composition does not contain a photoinitiator, and the composition polymerizes upon irradiation. The irradiation forms a polymer that demonstrates thermal stability and abrasion resistance, and functions as a moisture barrier. The resulting polymer does not contain any photoinitiator and is therefore useful as a coating or packaging material for foods, or as a coating or packaging material for any application where the exclusion of photoinitiator, and especially residual photoinitiator, is preferred, such as an outdoor weatherable application. A feature of the invention is that the polymerization through exposure to radiation of a composition containing vinyl acrylate may also initiate the polymerization of one or more of the additional components within the composition that would not ordinarily polymerize in the absence of a photoinitiator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.