Metal modified phenolic resin color developers
US4620874A · kind A · utility
7Cited by
2References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 28, 1984 |
| Grant date | Nov 4, 1986 |
| Priority date | — |
| Expiry date | Jun 28, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S428/913
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A carbonless copying color developer comprising a thermoplastic chelated metal modified phenolic resin formed from the in situ reaction of formaldehyde with a mixture of a para-substituted phenol, salicyclic acid, and a metal oxide. The reaction is conducted under hydrous conditions and at atmospheric pressure, with substantially no unreacted metal oxide residue.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.