Glass fiber reinforced polyester molding compositions containing metal salts

Claim 2

A thermoplastic molding composition from which parts may be molded exhibiting improved Arc Track Rate comprising (a) poly(1,4-butylene terephthalate) resin; and (b) an amount of at least one effective metal salt selected from the group consisting of the oxides, fluorides, chlorides, bromides, iodides, chlorates, nitrates, nitrites, borates, phosphates, phosphites, sulfates and sulfites of magnesium, aluminum, iron and potassium sufficient to reduce Arc Track Rate, said amount being from about 0.05 to about 1 part by weight of said metal salt for each 50 parts by weight of said poly(1,4-butylene terephthalate) resin.

Claim 3

The composition of claim 1 wherein said effective metal salt is a potassium salt.

Claim 4

The composition of claim 2 wherein said potassium salt is potassium iodide.

Claim 5

The composition of claim 1 which additionally contains a reinforcing amount of glass fiber reinforcement.

Claim 6

A thermoplastic molding composition from which parts may be molded exhibiting improved Arc Track Rate comprising: (a) poly(1,4-butylene terephthalate) resin; (b) a flame retarding halogenated aromatic flame retardant; (c) an effective amount of antimony compound synergist; and (d) an amount of at least one effective metal salt selected from the group consisting of the oxides, fluorides, chlorides, bromides, iodides, chlorates, nitrates, nitrites, borates, phosphates, phosphites, sulfates and sulfites of magnesium, aluminum, iron and potassium sufficient to reduce Arc Track Rate, said amount being from about 0.05 to about 1 part by weight of said metal salt for each 50 parts by weight of said resin and halogenated aromatic flame retardant.

Claim 7

A thermoplastic molding composition from which parts may be molded exhibiting improved Arc Track Rate comprising: (a) poly(1,4-butylene terephthalate) resin; (b) a flame retarding halogenated aromatic flame retardant; (c) an effective amount of antimony compound synergist; and (d) an amount of at least one effective metal salt selected from the group consisting of the oxides, fluorides, chlorides, bromides, iodides, chlorates, nitrates, nitrites, borates, phosphates, phosphites, sulfates and sulfites of magnesium, aluminum, iron and potassium sufficient to reduce Arc Track Rate, said amount being from about 0.05 to about 1 part by weight of said metal salt for each 50 parts by weight of said resin and halogenated aromatic flame retardant.

Claim 8

The composition of claim 5 wherein said effective metal salt is a potassium salt.

Claim 9

The composition of claim 6 wherein said potassium salt is potassium iodide.

Claim 10

The composition of claim 5 which additionally contains a reinforcing amount of glass fiber reinforcement.

Claim 11

A thermoplastic molding composition from which parts may be molded exhibiting improved Arc Track Rate comprising: (a) poly(1,4-butylene terephthalate) resin; and (b) an Arc Track Rate reducing amount of an effective metal salt selected from the group consisting of an oxide, fluoride, chloride, bromide, iodide and of a metal selected from the group consisting of and potassium, said amount being from about 0.05 to about 1 part by weight of said metal salt for each 50 parts by weight of said poly(1,4-butylene terephthalate) resin.

Claim 12

A thermoplastic molding composition from which parts may be molded exhibiting improved Arc Track Rate comprising: (a) poly(1,4-butylene terephthalate) resin; and (b) an Arc Track Rate reducing amount of an effective metal salt selected from the group consisting of an oxide, fluoride, chloride, bromide, iodide and of a metal selected from the group consisting of and potassium, said amount being from about 0.05 to about 1 part by weight of said metal salt for each 50 parts by weight of said poly(1,4-butylene terephthalate) resin.