Method of preparing phosphorus-containing flame retardants and their use in polymer compositions

US11993622B2 · kind B2 · utility

Inventors

• Simon J. Bonyhady · Waterbury, US
• Julia Lee · Naugatuck, US
• Qingliang He · Cheshire, US
• Ramesh Sharma · Schreiber, CA

Key dates

• Filing date: Dec 18, 2019
• Grant date: May 28, 2024
• Expiry date: May 25, 2040

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L2201/02
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Flame retardant material comprising a compound of empirical formula (III)wherein R is H, an alkyl, aryl, alkylaryl, or arylalkyl group;M is a metal and y is 3, such that M(+)y is a metal cation where (+)y represents the charge formally assigned to the cation;a, b, and c represent the ratio of the components to which they correspond relative to one another in the compound, and satisfy a charge-balance equation 2(a)+c=b(y); and a and c are not zero. The presently disclosed flame retardants are useful, for example, in polymer compositions, particularly thermoplastics processed at high temperatures, over a wide range of applications.