Patent ID: 8541489

Claim:
A flame retardant polyamide resin composition, comprising: (a) about 30 to about 90 weight percent of a polyamide component comprising about 60 to 100 weight percent of at least one semiaromatic polyamide wherein the semiaromatic polyamide is hexamethylene adipamide/hexamethylene terephthalamide copolyamide (polyamide 6,T/6,6); (b) at least one flame retardant comprising aluminum diethylphosphinate and/or aluminum methylethylphosphinate; (c) zinc stannate; and (d) 0 to about 60 weight percent of at least one inorganic reinforcing agent and/or filler, wherein the weight percentages of (a) and (d) are based on the total weight of the composition; wherein flame retardant (b) is present in an amount that is about 10 to about 45 percent of the weight of polyamide (a); and wherein zinc stannate (c) is present in an amount that is about 1 to about 50 percent of the weight of flame retardant (b) wherein the composition provides at least 50% less corrosion to a check ring compared to a composition having components (a), (b), and optionally (d), as measured by a Mold Corrosion Test.