Two-component diazotype material

US4457997A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Klaus Thoese · Wiesbaden, DE
• Hans-Dieter Frommeld · Wiesbaden, DE
• Siegfried Scheler · Wiesbaden, DE

Key dates

• Filing date: Jan 5, 1982
• Grant date: Jul 3, 1984
• Expiry date: Jan 5, 2002

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S430/112
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A two-component diazotype material, composed of a support and a light-sensitive layer which is applied thereto and contains a polymeric binder, a diazonium salt, a coupler, an acid stabilizer and conventional additives, wherein the support is a biaxially oriented polyester film and the polymeric binder comprises a mixture of about 10-60 percent by weight of a polymer or copolymer of vinyl acetate, for example, a copolymer of vinyl acetate and crotonic acid, and about 40-90 percent by weight of a cellulose ester, such as cellulose acetopropionate, cellulose acetobutyrate, cellulose propionate or cellulose butyrate.