Water-soluable rosin-based coatings and inks
US5104449A · kind A · utility
14Cited by
3References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 9, 1991 |
| Grant date | Apr 14, 1992 |
| Priority date | — |
| Expiry date | Aug 9, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09F1/04
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Stable pigmented coating composition, suitable as a package coating varnish or ink, including newsprint ink or rotogravure ink, comprises a suspension of at least 10 weight % pigment in an aqueous solution of at least 5 weight % water soluble modified rosin, the water-soluble modified rosin having an acid number of at least 150 and comprising the reaction product of rosin, formaldehyde and at least one of an ortho- or para-carboxyl-substituted phenol. The weight ratio of pigment to resin is from 5:1 to 1:5.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.