Reinforced polyester compositions, methods of manufacture, and articles thereof

A composition consisting essentially of, based on the total weight of the composition:

• from 20 to 90 wt. % of a polyester component comprising a poly(butylene terephthalate);
• from 5 to 35 wt. % of
• a flame retardant phosphinate of the formula (Ia)
• [(R1)(R2)(PO)—O]−3Al3+ (Ia),
• a flame retardant diphosphinate of the formula (IIa)
• [(O—POR1)(R3)(POR2—O)]2−3Al3+2 (IIa), and/or
• a flame retardant polymer derived from formula (I) or (II),
• wherein R1 and R2 are identical or different and are H, C1-C6 alkyl, linear or branched, or C6-C10 aryl;
• and R3 is C1-C10, alkylene, linear or branched, C6-C10 arylene, C7-C11 alkylarylene, or C7-C11 arylalkylene;
• from 1 to 25 wt. % of melamine polyphosphate and/or melamine cyanurate;
• from 1 to 55 wt. % of a glass fiber having a flat cross-section;
• and
• from 0 to 5 wt. % of an additive selected from the group consisting of a mold release agent, an antioxidant, a thermal stabilizer, an antioxidant, and a UV stabilizer;
• wherein the composition contains less than 900 ppm of a halogen selected from the group consisting of bromine, chlorine, and combinations thereof;
• and
• wherein the components and have a combined total weight of 100 wt. %, and
• wherein a molded sample comprising the composition has a comparative tracking index ranging from 350 volts to 600 volts in accordance with ASTM D3638-85, UL746A, or IEC-112 3rd publication and a 0.8 mm thick molded sample comprising the composition has a UL-94 flammability rating of V0.

A composition consisting essentially of, based on the total weight of the composition:

• from 20 to 90 wt. % of a polyester component comprising a poly(butylene terephthalate);
• from 5 to 25 wt. % of
• a flame retardant phosphinate of the formula (Ia)
• [(R1)(R2)(PO)—O]−3Al3+ (Ia),
• a flame retardant diphosphinate of the formula (IIa)
• [(O—POR1)(R3)(POR2—O)]2−3Al3+2 (IIa), and/or
• a flame retardant polymer derived from formula (Ia) or (IIa),
• wherein R1 and R2 are identical or different and are H, C1-C6 alkyl, linear or branched, or C6-C10 aryl;
• and R3 is C1-C10, alkylene, linear or branched, C6-C10 arylene, C7-C11 alkylarylene, or C7-C11 arylalkylene;
• from 1 to 15 wt. % of melamine polyphosphate and/or melamine cyanurate;
• from 1 to 45 wt. % of a glass fiber having a flat cross-section;
• and
• from 0 to 5 wt. % of an additive selected from the group consisting of a mold release agent, an antioxidant, a thermal stabilizer, an antioxidant, and a UV stabilizer;
• less than 900 ppm of a halogen selected from the group consisting of bromine, chlorine, and combinations thereof;
• wherein the composition contains less than 900 ppm of a halogen selected from the group consisting of bromine, chlorine, and combinations thereof;
• and
• wherein the components and have a combined total weight of 100 wt. %;
• and wherein the a molded sample comprising the composition has a comparative tracking index ranging from 350 volts to 600 volts in accordance with ASTM D3638-85, UL746A, or IEC-112 3rd publication, and a 0.8 mm thick molded sample comprising the composition has a UL-94 flammability rating of V0.