Polyester compositions, method of manufacture, and uses thereof

US8188172B2 · kind B2 · utility

Assignee

• Sabic Innovative Plastics B.V. · NL

Inventors

• Somasundaram Elango · Savanuru, IN
• Rama Konduri · Evansville, US
• Subodh Kumar Pal · Savanuru, IN
• Reema Sinha · Savanuru, IN
• Veeraraghavan Srinivasan · Bengaluru, IN
• Chris van der Weele · Sommelsdijk, NL
• Gerrit de Wit · Ossendrecht, NL

Key dates

• Filing date: Oct 11, 2007
• Grant date: May 29, 2012
• Expiry date: Oct 8, 2029

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L85/02
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A composition is described, comprising: (a) from 20 to 80 wt % of a polyester; (b) from 5 to 35 wt % of a flame retardant phosphinate of the formula (I)[(R1)(R2)(PO)—O]−mMm+  (I),a flame retardant diphosphinate of the formula (II)[(O—POR1)(R3)(POR2—O)]2−nMxm+  (II),and/or a flame retardant polymer derived from the flame retardant phosphinate of the formula (I) or the flame retardant diphosphinate of the formula (II), wherein R1 and R2 are identical or different and are H, C1-C6-alkyl, linear or branched, or C6-C10-aryl; R3 is C1-C10-alkylene, linear or branched, C6-C10-arylene, -alkylarylene or -arylalkylene; M is an alkaline earth metal, alkali metal, Al, Ti, Zn, Fe, or boron; m is 1, 2, 3 or 4; n is 1, 2, or 3; and x is 1 or 2; (c) from 1 to 25 wt % of a melamine polyphosphate, melamine cyanurate, melamine pyrophosphate, and/or melamine phosphate; (d) from more than 0 to 25 wt % of a polyetherimide; and (e) optionally, an additive.