Chromogenic 3,1-benzoxazines

US4831141A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Horst Berneth · Leverkusen, DE
• Gert Jabs

Key dates

• Filing date: Jun 1, 1987
• Grant date: May 16, 1989
• Expiry date: Jun 1, 2007

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B19/00
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

The invention relates to chromogenic 3,1-benzoxazines of the formula ##STR1## wherein X.sup.1 denotes hydrogen, C.sub.1 -C.sub.4 -alkyl, chlorine or OY.sup.1, PA1 X.sup.2 denotes NY.sup.2 Y.sup.3, PA1 X.sup.3 denotes OY.sup.4 or NY.sup.5 Y.sup.6, PA1 R.sup.1 -R.sup.3 independently of one another denote hydrogen, C.sub.1 -C.sub.4 -alkyl, chlorine, C.sub.1 -C.sub.4 -alkoxy or C.sub.1 -C.sub.4 -mono- or -dialkylamino, or PA1 R.sup.1 together with Y.sup.2, PA1 R.sup.2 or R.sup.3 together with Y.sup.4 or Y.sup.5, or PA1 R.sup.2 and R.sup.3 simultaneously with Y.sup.5 and Y.sup.6 denote a 2 to 4-membered bridge which can contain one oxygen atom or one nitrogen atom and can carry up to 4 methyl groups, and wherein PA1 R.sup.1 and R.sup.3 simultaneously represent hydrogen only if R.sup.2 with Y.sup.4 or Y.sup.5 forms one of the abovementioned bridges, PA1 R.sup.4 denotes hydrogen, methyl or chlorine, PA1 Y.sup.1 and Y.sup.4 independently of one another denote C.sub.1 -C.sub.4 -alkyl, cyclohexyl or benzyl and Y.sup.2, Y.sup.3, Y.sup.5 and Y.sup.6 independently of one another denote hydrogen, C.sub.1 -C.sub.4 -alkyl, cyclohexyl or benzyl, are used for pressure-copying, thermoreactive or elec…