Phosphorus-sulfur FR additives and polymer systems containing same

US8058332B2 · kind B2 · utility

Assignee

• DOW GLOBAL TECHNOLOGIES LLC · US

Inventors

• Ravi B. Shankar · Midland, US
• David R. Wilson · Midland, US
• William J. Kruper, Jr. · Sanford, US
• Bruce A. King · Midland, US
• Michelle L. Hudack · Midland, US
• Chun-Chin Wang · Daxi District, TW
• Ted A. Morgan · Midland, US
• Inken Beulich · Laufenburg (Baden), DE
• Daniel J. Murray · Midland, US
• William G. Stobby · Midland, US
• Mark W. Beach · Midland, US
• Ing-Feng Hu · Midland, US

Key dates

• Filing date: Oct 18, 2010
• Grant date: Nov 15, 2011
• Expiry date: Oct 18, 2030

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K5/5398
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Phosphorus-sulfur compounds have flame retardant activity in organic polymer systems. The phosphorus-sulfur compounds can be represented by the structure:wherein X is oxygen or sulfur, T is a covalent bond, oxygen, sulfur or nitrogen, provided that at least one of X and T is sulfur, each X′ is independently oxygen or sulfur, each m is independently zero or 1 when X′ is oxygen and zero, 1 or 2 when X′ is sulfur, n is at least 1 and preferably at least 2, each R is independently an unsubstituted or inertly substituted hydrocarbyl group or the R groups together form an unsubstituted or inertly substituted divalent organic group and A is an organic linking group.