Polyalkylene terephthalate molding resin and process for making same

Claim 2

A MOLDING RESIN HAVING REDUCED BURNING PROPERIES COMPRISING AN INTIMATE BLEND OF A POLYALKYLENE TEREPHTHALATE SELECTED FROM THE GROUP CONSISTING OF POLYPROPYLENE TEREPHATHALATE AND POLYBUTYLENE TEREPHTHALATE, THE POLYALKYLENE TEREPHATHALATE HAVING AN INTRINIC VISOCITY IN THE RANGE FROM ABOUT 3.2 TO ABOUT 1.2 DECILITERS PER GRAM, A REINFORCING AGENT, AN AROMATIC HALIDE STABLE AT TEMPERATURE NECESSARY FOR MELT PROCESSING OF THE POLYALKYLENE TEREPHATHALATE AND CAPABLE OF DECOMPOSING AT COMBUSTION TEMPERATURES OF THE POLYALKYLENE TETEPHTHALATE, AND A GROUP BV METAL CONTAINING COMPOUND, WHEREIN THE WEIGHT RATIO OF AVAILABLE HALOGEN IN THE AROMATIC HALIDE TO THE AVAILABLE GROUP VB METAL IN THE GROUP VB METAL CONTAINING COMPOUND RANGES FROM ABOUT 0.3 TO ABOUT 4.

Claim 3

The molding resin of claim 1 wherein the reinforcing agent is present in the range of from about 2 to about 60 weight percent of the total composition, the halogen in the aromatic halide is present in an amount from about 3.3 to about 16.6 weight percent, based on the weight of the resin and the metal in the Group Vb metal containing compound is present in the range of from about 0.7 to about 10.0 weight percent, based on the weight of the resin.

Claim 4

The molding resin of claim 2 wherein the ratio of available halide in the aromatic halogen to the available Group Vb metal in the Group Vb metal containing compound ranges from about 0.46 to about 3.8.

Claim 5

The molding resin of claim 2 wherein the ratio of available halogen in the aromatic halide to the available Group Vb metal in the Group Vb metal containing compound ranges from about 0.46 to about 2.

Claim 6

The molding resin of claim 2 wherein the Group Vb metal containing compound contains a metal selected from the group consisting of antimony, arsenic and bismuth.

Claim 7

The molding resin of claim 2 wherein the Group Vb metal containing compound contains antimony.

Claim 8

The molding resin of claim 2 wherein the Group Vb metal containing compound is selected from the group consisting of the oxides of arsenic, antimony and bismuth.

Claim 9

The molding resin of claim 2 wherein the Group Vb metal containing compound is antimony trioxide.

Claim 10

The molding resin of claim 2 wherein the aromatic halide is selected from the group consisting of

Claim 11

The molding resin of claim 9 wherein the aromatic halide has at least two halogens in the compound.

Claim 12

The molding resin of claim 10 wherein the aromatic halide is selected from the group cconsisting of tetrabromophthalic anhydride, tetrachlorophthalic anhydride, decabromobiphenyl ether and decachlorobiphenyl ether.

Claim 13

The molding resin of claim 2 wherein the reinforcing agent is glass fiber present in an amount from about 5 to about 40 weight percent, based on the total composition.

Claim 14

The molding resin of claim 12 wherein the polyalkylene terephthalate is polybutylene terephthalate.

Claim 15

The molding resin of claim 12 wherein the polyalkylene terephthalate is polypropylene terephthalate.

Claim 16

A molding resin having reduced burning properties comprising an intimate blend of a polyalkylene terephthalate selected from the group consisting of polybutylene terephthalate and polypropylene terephthalate, having an intrinsic viscosity in the range of from about 0.2 to about 1.2 deciliters per gram, from about 5 to about 60 weight percent, based on the total composition, of glass reinforcing agent, and from about 3.3 to about 16.6 weight percent halogen, based on the weight of the resin of an aromatic halide selected from the group consisting of tetrabromophthalic anhydride, tetrachlorophthalic anhydride, decabromobiphenyl ether and decachlorobiphenyl ether, and from about 0.7 to about 10.0 weight precent metal, based on the weight of the resin, of antimony trioxide, the ratio of available halogen in the aromatic halide to available antimony in the antimony trioxide being greater than about 0.46 to about 4.0.

Claim 17

A molding resin having reduced burning properties comprising an intimate blend of a polyalkylene terephthalate selected from the group consisting of polybutylene terephthalate and polypropylene terephthalate, having an intrinsic viscosity in the range of from about 0.2 to about 1.2 deciliters per gram, from about 5 to about 60 weight percent, based on the total composition, of glass reinforcing agent, and from about 3.3 to about 16.6 weight percent halogen, based on the weight of the resin of an aromatic halide selected from the group consisting of tetrabromophthalic anhydride, tetrachlorophthalic anhydride, decabromobiphenyl ether and decachlorobiphenyl ether, and from about 0.7 to about 10.0 weight precent metal, based on the weight of the resin, of antimony trioxide, the ratio of available halogen in the aromatic halide to available antimony in the antimony trioxide being greater than about 0.46 to about 4.0.

Claim 18

The molding resin of claim 15 wherein the ratio of available halogen in the aromatic halide to available antimony in the antimony trioxide ranges from about 0.46 to about 2.

Claim 19

A process for preparing a molding resin having reduced burning properties comprising intimately blending a polyalkylene terephthalate selected from the group consisting of polypropylene terephthalate and polybutylene terephthalate, having an intrinsic viscosity in the range of from about 0.2 to about 1.2 deciliters per gram, with from about 3.3 to about 16.6 weight percent halogen, based on the weight of the resin of an aromatic halide stable at processing temperatures of the polyalkylene terephthalate and capable of decomposing at combustion temperatures of the polyalkylene terephthalate and from about 0.7 to about 10.0 weight percent metal, based on the weight of the resin of a Group Vb metal containing compound and wherein the ratio of available halide in the aromatic halide to available Group Vb metal in the Group Vb metal containing compound ranges from about 0.3 to about 4 and thereafter blending in from about 2 to about 60 weight percent, based on the total composition of a reinforcing agent.

Claim 20

A process for preparing a molding resin having reduced burning properties comprising intimately blending a polyalkylene terephthalate selected from the group consisting of polypropylene terephthalate and polybutylene terephthalate, having an intrinsic viscosity in the range of from about 0.2 to about 1.2 deciliters per gram, with from about 3.3 to about 16.6 weight percent halogen, based on the weight of the resin of an aromatic halide stable at processing temperatures of the polyalkylene terephthalate and capable of decomposing at combustion temperatures of the polyalkylene terephthalate and from about 0.7 to about 10.0 weight percent metal, based on the weight of the resin of a Group Vb metal containing compound and wherein the ratio of available halide in the aromatic halide to available Group Vb metal in the Group Vb metal containing compound ranges from about 0.3 to about 4 and thereafter blending in from about 2 to about 60 weight percent, based on the total composition of a reinforcing agent.

Claim 21

The process of claim 17 wherein the ratio of available halide in the aromatic halide to available Group Vb metal in the Group Vb metal containing compound ranges from about 0.3 to about 3.8.

Claim 22

The process of claim 17 wherein the ratio of available halogen in the aromatic halide to available Group Vb metal in the Group Vb metal containing compound ranges from about 0.46 to about 2.

Claim 23

The process of claim 17 wherein the Group Vb metal containing compound contains a metal selected from the group consisting of: antimony, arsenic, bismuth.

Claim 24

The process of claim 17 wherein the Group Vb metal containing compound contains antimony.

Claim 25

The process of claim 21 wherein the antimony is present in the form of antimony trioxide.

Claim 26

The process of claim 17 wherein the aromatic halide is selected from the group consisting of

Claim 27

The process of claim 23 wherein the aromatic halide is selected from the group consisting of tetrabromophthalic anhydride, tetrachlorophthalic anhydride, decabromobiphenyl ether and decachlorobiphenyl ether.

Claim 28

A process for preparing a molding resin having reduced burning properties comprising blending a polyalkylene terephthalate selected from the group consisting of polypropylene terephthalate and polybutylene terephthalate having an intrinsic viscosity in the range of from about 0.2 to about 1.2 deciliters per gram with from about 3.3 to about 16.6 weight percent halogen, based on the weight of the resin, of an aromatic halide selected from the group consisting of tetrabromophthalic anhydride, tetrachlorophthalic anhydride, decabromobiphenyl ether and decachlorobiphenyl ether and from about 0.7 to about 10.0 weight percent metal based on the weight of the resin of an antimony containing compound wherein the ratio of available halogen in the aromatic halide to available antimony in the antimony containing compound ranges from about 0.3 to about 4, and thereafter blending in from about 2 to about 60 weight percent, based on the total composition, of glass reinforcing agent.

Claim 29

A process for preparing a molding resin having reduced burning properties comprising blending a polyalkylene terephthalate selected from the group consisting of polypropylene terephthalate and polybutylene terephthalate having an intrinsic viscosity in the range of from about 0.2 to about 1.2 deciliters per gram with from about 3.3 to about 16.6 weight percent halogen, based on the weight of the resin, of an aromatic halide selected from the group consisting of tetrabromophthalic anhydride, tetrachlorophthalic anhydride, decabromobiphenyl ether and decachlorobiphenyl ether and from about 0.7 to about 10.0 weight percent metal based on the weight of the resin of an antimony containing compound wherein the ratio of available halogen in the aromatic halide to available antimony in the antimony containing compound ranges from about 0.3 to about 4, and thereafter blending in from about 2 to about 60 weight percent, based on the total composition, of glass reinforcing agent.

Claim 30

The process of claim 25 wherein the range of intrinsic viscosity of the polyalkylene terephthalate is from about 0.5 to about 1.0 deciliters per gRam, wherein the antimony containing compound is antimony trioxide and wherein the ratio of available halogen to available antimony ranges from about 0.3 to about 3.8.

Claim 31

The process of claim 25 wherein the glass reinforcing agent is present in the range of from about 5 to about 40 weight percent, based on the weight of the total composition and the ratio of available halogen to available antimony ranges from 0.46 to about 2.

Claim 32

The molding resin of claim 2 wherein the reinforcing agent is asbestos fibers present in amount from about 5 to about 40 weight percent, based on the total composition.

Claim 33

The molding resin of claim 2 wherein the reinforcing agent is synthetic fibers present in amount from about 5 to about 40 weight percent, based on the total composition.