Hybrid UV-LED radiation curable protective varnishes for security documents
US12391841B2 · kind B2 · utility
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15Claims
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Key dates
| Filing date | Jun 8, 2022 |
| Grant date | Aug 19, 2025 |
| Priority date | — |
| Expiry date | Oct 23, 2042 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D11/30
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to the technical field of varnishes for protecting security documents, such as banknotes, against premature detrimental influence of soil and/or moisture upon use and time. In particular, the present invention provides a hybrid UV-LED radiation curable protective varnish comprising: wherein the weight percents are based on the total weight of the hybrid UV-LED radiation curable protective varnish.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.