Intumescent flame-retardant coating compositions

US4166743A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Joachim Wortmann · Kerpen, DE
• Franz-Josef Dany · Lechenich, DE
• Joachim Kandler · Lechenich, DE

Key dates

• Filing date: Jan 31, 1978
• Grant date: Sep 4, 1979
• Expiry date: Jan 31, 1998

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S428/921
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Intumescent flame-retardant coating composition consisting substantially of a film-forming agent, an ammonium polyphosphate, one or more substances which are carbonizable under the action of heat, a dispersant, and optionally a filler. The coating composition additionally contains an ammonium polyphosphate activator weighing 0.5 to 50% of the weight of ammonium polyphosphate. The activator is constituted by at least one salt which contains water of crystallization which is liberated upon the composition being heated to about 35.degree. C.