High-performance overprint varnishes comprising composite SMA latices
US5902846A · kind A · utility
6Cited by
3References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 8, 1997 |
| Grant date | May 11, 1999 |
| Priority date | — |
| Expiry date | Sep 8, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L35/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
High-performance overprint varnishes, well-suited for the protective coating of a wide variety of substrates, e.g., papers, cardboards and packaging materials, include a composite latex and characteristically a polyethylene wax emulsion, the composite latex comprising the copolymerizate of at least one hydrophobic monomer within an aqueous solution of a styrene/maleic anhydride resin, the styrene/maleic anhydride resin having a molecular weight ranging from 500 to 5,000 and an acid number of at most 500, and the amount by weight of the styrene/maleic anhydride resin in the copolymerizate ranging from 5% to 50%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.