Polymer stabilization

Claim 2

A resin composition exhibiting improved heat stability comprising a poly(arylene sulfide) resin containing an effective stabilizing amount sufficient to retard resin curing and cross-linking of at least one substituted amido triazole.

Claim 3

An article of manufacture formed from the composition of claim 1.

Claim 4

A fiber or film formed from the composition of claim 1.

Claim 5

A composition according to claim 1 wherein the amount of stabilizer present ranges from about 0.1 to about 5 weight percent based on the weight of the arylene sulfide polymer.

Claim 6

A composition according to claim 4 wherein said arylene sulfide polymer is a poly(p-phenylene sulfide) having a melt flow of about 50 to about 400.

Claim 7

A composition according to claim 4 wherein said amido triazole has the formula ##STR2## where R 1 is H or a hydrocarbyl radical having 1 to about 10 carbon atoms and R 2 is a substituted arylene radical having 6 to about 10 carbon atoms.

Claim 8

A composition according to claim 4 wherein said arylene sulfide polymer is poly(p-phenylene sulfide) and said amido triazole is 3-salicyloylamido-1,2,4-triazole.

Claim 9

A method for improving the heat stability of poly(arylene sulfide) resins which comprises incorporating therein an effective stabilizing amount of at least one substituted triazole stabilizer as defined in claim 6 which amount is sufficient to retard curing and cross-linking of said resin during heating.

Claim 10

A method according to claim 8 wherein the amount of said stabilizer ranges from about 0.1 to about 5 weight percent based on the weight of the arylene sulfide polymer.

Claim 11

A process according to claim 8 wherein said arylene sulfide polymer is poly(p-phenylene sulfide).

Claim 12

A method according to claim 8 wherein said amido triazole has the formula ##STR3## where R 1 is H or a hydrocarbyl radical having 1 to about 10 carbon atoms and R 2 is substituted arylene radical having 6 to about 10 carbon atoms.

Claim 13

A method according to claim 8 wherein said arylene sulfide polymer is poly(p-phenylene sulfide) and said stabilizer is 3-salicylolamido-1,2,4-triazole.

Claim 14

A method according to claim 8 wherein said arylene sulfide polymer is fiber or film grade poly(p-phenylene sulfide) having a melt flow of about 50-400.

Claim 15

In a process for melt extruding a poly(arylene sulfide) resin, the improvement for reducing gel formation during melt extrusion which comprises incorporating into said resin an effective heat and melt flow stabilizing amount of at least one substituted amido triazole which amount is sufficient to retard curing and cross-linking of said resin during melt extrusion and thereby minimizing plugging of filters and spinnerets with gel.

Claim 16

In a process for melt extruding a poly(arylene sulfide) resin, the improvement for reducing gel formation during melt extrusion which comprises incorporating into said resin an effective heat and melt flow stabilizing amount of at least one substituted amido triazole which amount is sufficient to retard curing and cross-linking of said resin during melt extrusion and thereby minimizing plugging of filters and spinnerets with gel.

Claim 17

A process according to claim 14 wherein said resin is a poly(p-phenylene sulfide) resin having a melt flow of about 50 to about 400.

Claim 18

A process according to claim 14 wherein the amount of stabilizer added ranges from about 0.1 to about 5 weight percent based on the weight of the arylene sulfide polymer.

Claim 19

A process according to claim 14 wherein said resin is a poly(p-phenylene sulfide) resin and said stabilizer is 3-salicyloylamido-1,2,4-triazole.

Claim 20

A process according to claim 17 wherein said poly(p-phenylene sulfide) has a melt flow of about 50-400.

Claim 21

In a process for producing fiber and film by melt extruding a poly(arylene sulfide) resin having a melt flow of about 50 to about 400, the improvement for reducing gel formation during melt extrusion which comprises incorporating into said resin an effective heat and melt flow stabilizing amount in the range of about 0.1 to about 5 weight percent based on the weight of the arylene sulfide polymer of at least one substituted amido triazole having the formula ##STR4## which amount is sufficient to retard curing and cross-linking or substantial alteration of physical properties of said resin during melt extrusion as determined by Rheometric Dynamic Spectrometer (RDS) storage modulus and thereby minimize plugging of processing equipment with gel.

Claim 22

In a process for producing fiber and film by melt extruding a poly(arylene sulfide) resin having a melt flow of about 50 to about 400, the improvement for reducing gel formation during melt extrusion which comprises incorporating into said resin an effective heat and melt flow stabilizing amount in the range of about 0.1 to about 5 weight percent based on the weight of the arylene sulfide polymer of at least one substituted amido triazole having the formula ##STR4## which amount is sufficient to retard curing and cross-linking or substantial alteration of physical properties of said resin during melt extrusion as determined by Rheometric Dynamic Spectrometer (RDS) storage modulus and thereby minimize plugging of processing equipment with gel.

Claim 23

A process according to claim 19 wherein said arylene sulfide polymer is a poly(p-phenylene sulfide) resin and said triazole is 3-salicyloylamido-1,2,4-triazole.

Claim 24

A process according to claim 19 wherein the amount of said triazole added ranges from about 0.5 to about 2 weight percent based on the weight of arylene sulfide polymer.

Claim 25

A film of fiber formed according to the process of claim 19.