High solids CB printing ink containing a protective colloid blend
US4940738A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 11, 1989 |
| Grant date | Jul 10, 1990 |
| Priority date | — |
| Expiry date | Aug 11, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D11/02
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A high solids content, aqueous, microcapsule-containing printing ink is prepared by forming microcapsules in situ in a printing ink vehicle. The microcapsules are preferably prepared by interfacial polymerization or interfacial crosslinking between a reactant, such as a polyisocyanate dissolved in an oily solution and a coreactant such as a polysalt of casein and diethylene triamine present in an aqueous solution into which the oily solution is dispensed. The aqueous solution contains water and a non-volatile diluent such as a non-reducing sugar, for example methyl glucoside. The printing ink preferably has a 60-70% by weight solids content and may be used as a low-coat-weight CB coating for preparing carbonless copy paper.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.