Halogen free high temperature polyamide compositions comprising phosphorus containing flame retardants

A flame retardant polymer composition comprising:

• a) a high temperature polyamide, and
• b) from 1% to 24%, by weight based on the total weight of the flame retardant polymer composition, of a flame retardant material obtained by a process comprising heating at temperatures of about 200° C. or higher from about 0.01 hour to about 20 hours one or more than one compound of formula (I)
• wherein
• R is C1-12 alkyl, C6-10 aryl, C7-18 alkylaryl, or C7-18 arylalkyl, wherein said alkyl, aryl,
• alkylaryl, or arylalkyl are unsubstituted or are substituted by hydroxyl, amino, C1-4 alkylamino, di-C1-4 alkylamino, C1-4 alkoxy, carboxy or C2-5 alkoxycarbonyl;
• M is a metal,
• y is a number of from 1 to 4 so that M(+)y is a metal cation where (+)y represents the charge formally assigned to the cation, and p is a number of from 1 to 4.