Heat sensitive recording material

US6624117B1 · kind B1 · utility

Assignee

• Ciba Specialty Chemicals Corporation · US

Inventors

• Michael Heneghan · Rheinfelden (Baden), DE
• Roy Alan Kirk · Manchester, GB
• James Taylor · Macclesfield, GB
• John Whitworth · Audenshaw, GB
• Robert M. O'Neil · Manchester, GB
• John Barry Henshall · Manchester, GB

Key dates

• Filing date: Oct 1, 2001
• Grant date: Sep 23, 2003
• Expiry date: Oct 1, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C311/62
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A heat sensitive recording material, comprisinga) at least one colour forming compound, andb) at least one developer of the formula  whereinR1 is unsubstituted or substituted phenyl, naphthyl or C1-C20alkyl,X is a group of the formula A is unsubstituted or substituted phenylene, naphthylene or C1-C12alkylene, or is an unsubstituted or substituted heterocyclic group,B is a linking group of formula —O—SO2—, —SO2—O—, —NH—SO2—, —SO2—NH—, —S—SO2—, —O—CO—, —O—CO—NH—, —NH—CO—, —NH—CO—O—, —S—CO—NH—, —S—CS—NH—, —CO—NH—SO2—, —O—CO—NH—SO2—, —NH═CH—, —CO—NH—CO—, —S—, —CO—, —O—, —SO2—NH—CO—, —O—CO—O— and —O—PO—(OR2)2, andR2 is unsubstituted or substituted aryl or benzyl or C1-C20alkyl,with the proviso, that, if B is not a linking group of formula —O—SO2—, R2 i…