Color-developing compositions and their use
US5376615A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 20, 1992 |
| Grant date | Dec 27, 1994 |
| Priority date | — |
| Expiry date | Jul 20, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2261/312
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A color-developing composition comprises a multi-valent-metal-modified salicylic acid resin (Resin A) and a polycondensation resin (resin B) at a weight ratio of 90-30 to 10-70. Resin A is composed of 5-35 mole % of a structural unit (I) and 65-95 mole % of at least one structural unit (II) or 65-95 mole % of a coupled structural unit of at least one unit (II) and at least one unit (III) and has a weight-average molecular weight of 350-5,000. Resin B is composed of the unit (II) and/or the unit (III) and has a weight-average molecular weight of 350-5,000. ##STR1## wherein Z represents M/m, M being a metal ion of m valence and m being an integer; R.sub.1 and R.sub.2 represent H or a C.sub.1-12 alkyl, aralkyl, aryl or cycloalkyl group; R.sub.3 and R.sub.6 represent H or a C.sub.1-4 alkyl group; and R.sub.4 and R.sub.5 represent H or CH.sub.3.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.