Spinning solution of sulfochlorinated ethylene-propylene copolymer, filaments thereof, and process for obtaining them

Claim 2

ELASTIC FILAMENTS AND YEAR OF VULCANIZED SULFOCHLORINATED COPOLYMERS OF ETHYLENE AND PROPYLENE CONTAINING, IN THE SULFOCHLORINATED STAE, FROM ABOUT 0.2% TO ABOUT 3.0% OF COMBINED SULFUR AND AT LEAST 1.4% BUT LESS THAN 10% OF COMBINED CHLORINE, THE COPOLYMERS BEING CHARACTERIZED IN THAT, PRIOR TO SULFOCHLORINATION, THEY ARE LINEAR, AMORPHOUS UNDER X-RAY ANALYSIS, ESSENTIALLY FREE OF HOMOPOLYMERS, CONTAIN FROM 5% TO 70% BY WEIGHT OF ETHYLENE IN THE COPOLYMER MOLECULE, SHOW, IN THE INFRA-RED SPECTRUM THEREFOR, BANDS BETWEEN 13.4 MICRONS AND 13.8 MICRONS, AND HAVE A MOLECULAR WEIGHT ABOVE 20,000.

Claim 3

A PROCESS FOR OBTAINING ELASTIC FILAMENTS AND YARNS CHARACTERIZED BY HIGH MECHANICAL STRENGHT AND RESISTANCE TO WEATHERING, WHICH PROCESS COMPRISES DISSOLVING A SULFOCHLORINATED LINEAR COPOLYMER OF ETHYLENE AND PROPYLENE CONTAINING IN THE SULFOCHLORINATED STATE FROM ABOUT 0.2% TO ABOUT 3.0% OF COMBINED SULFUR AND AT LEAST 1.4% BUT LESS THAN 10% OF COMBINED CHLORINE, THE COPOLYMER BEING CHARACTERIZED IN THAT, PRIOR TO SULFOCHLORINATION, IT IS AMORPHOUS UNDER X-RAY ANALYSIS, CONTAINS FROM ABOUT 5% TO ABOUT 70% BY WEIGHT OF ETHYLENE IN THE COPOLMER MOLECULE, IS ESSENTIALLY FREE FROM HOMOPOLYMERS, SHOWS, IN THE INFRA-RED SPECTRUM THEREFOR, BANDS BETWEEN 13.4 MICRONS AND 13.8 MICRONS AND HAS A MOLECULAR WEIGHT ABOVE 20,000, IN A SOLVENT FOR THE COPOLYMER SELECTED FROM THE GROUP CONSISTING OF BENZENE, CHLOROBENZENE, AND CARBON TETRACHLORIDE, TO OBTAIN A SOLUTION HAVING A CONCENTRATION OF THE SULFOCHLORINATED COPOLYMER OF FROM 3% TO 20% AND A VISCOSITY S!CH THAT BETWEEN 600 AND 1200 SECONDS ARE REQIRED FOR A STAINLESS STEEL SPHERE WEIGHING 0.1295 GRAM TO FALL VERTICALLY THROUGH 10 CENTIMETERS OF THE SOLUTION, EXTRUDING THE SOLUTION THROUGH A SPINNERET INTO A SETTING MEDIUM SELECTED FROM THE GROUP CONSISTING OF LOWER ALIPHATIC ALCOHOLS AND LOWER ALIPHATIC KETONES TO FORM FILAMENT WITH REMOVAL OF THE SOLVENT, AND THEN VULCANIZING THE FILAMENTS BY HEATING THEM AT A TEMPERATURE BETWEEN 125* C. AND 170* C. IN THE PRESENCE OF AT LEAST ONE VULCANIZING AID WHICH IS AN ACID ACCEPTOR SELECTED FROM THE GROUP CONSISTING OF LEAD OXIDE, BENZIDINE AND N-CYCLOHEXYL-2-BENZOTHIAZOL-SULFENAMIDE.

Claim 4

A PROCESS FOR OBTAINING ELASTIC FILAMENTS AND YARNS CHARACTERIZED BY HIGH MECHANICAL STRENGHT AND RESISTANCE TO WEATHERING, WHICH PROCESS COMPRISES DISSOLVING A SULFOCHLORINATED LINEAR COPOLYMER OF ETHYLENE AND PROPYLENE CONTAINING IN THE SULFOCHLORINATED STATE FROM ABOUT 0.2% TO ABOUT 3.0% OF COMBINED SULFUR AND AT LEAST 1.4% BUT LESS THAN 10% OF COMBINED CHLORINE, THE COPOLYMER BEING CHARACTERIZED IN THAT, PRIOR TO SULFOCHLORINATION, IT IS AMORPHOUS UNDER X-RAY ANALYSIS, CONTAINS FROM ABOUT 5% TO ABOUT 70% BY WEIGHT OF ETHYLENE IN THE COPOLMER MOLECULE, IS ESSENTIALLY FREE FROM HOMOPOLYMERS, SHOWS, IN THE INFRA-RED SPECTRUM THEREFOR, BANDS BETWEEN 13.4 MICRONS AND 13.8 MICRONS AND HAS A MOLECULAR WEIGHT ABOVE 20,000, IN A SOLVENT FOR THE COPOLYMER SELECTED FROM THE GROUP CONSISTING OF BENZENE, CHLOROBENZENE, AND CARBON TETRACHLORIDE, TO OBTAIN A SOLUTION HAVING A CONCENTRATION OF THE SULFOCHLORINATED COPOLYMER OF FROM 3% TO 20% AND A VISCOSITY S!CH THAT BETWEEN 600 AND 1200 SECONDS ARE REQIRED FOR A STAINLESS STEEL SPHERE WEIGHING 0.1295 GRAM TO FALL VERTICALLY THROUGH 10 CENTIMETERS OF THE SOLUTION, EXTRUDING THE SOLUTION THROUGH A SPINNERET INTO A SETTING MEDIUM SELECTED FROM THE GROUP CONSISTING OF LOWER ALIPHATIC ALCOHOLS AND LOWER ALIPHATIC KETONES TO FORM FILAMENT WITH REMOVAL OF THE SOLVENT, AND THEN VULCANIZING THE FILAMENTS BY HEATING THEM AT A TEMPERATURE BETWEEN 125* C. AND 170* C. IN THE PRESENCE OF AT LEAST ONE VULCANIZING AID WHICH IS AN ACID ACCEPTOR SELECTED FROM THE GROUP CONSISTING OF LEAD OXIDE, BENZIDINE AND N-CYCLOHEXYL-2-BENZOTHIAZOL-SULFENAMIDE.

Claim 5

A SPINNING SOLUTION CONSISTING ESSENTIALLY OF A SULFOCHLORINATED COPOLMER OF ETHYLENE AND PROPYLENE CONTAINING, IN THE SULFOCHLORINATED STATE, FROM 0.2% TO 3.0% OF COMBINED SULFUR AND AT LEAST 1.4% BUT LESS THAN 10% OF COMBINED CHLORINE, WHICH COPOLYMER IS CHARACTERIZED IN THAT, PRIOR TO SULFOCHLORINATION, IT IS LINEAR, AMORPHOUS UNDER X-RAY ANALYSIS, ESSENTIALLY FREE OF HOMOPOLYMERS, CONTAINS FROM 5% TO 70% OF ETHYLENE BY WEIGHT IN THE COPOLYMER MOLECULE, SHOWS, IN THE INFRARED SPECTRUM THEREFOR, BANDS BETWEEN 13.4 MICRONS AND 13.8 MICRONS, AND HAS A MOLECULAR WEIGHT ABOVE 20,000, DISSOLVED IN A SOLVENT THEREFOR SELECTED FROM THE GROUP CONSISTING OF BENZENE, CHLOROBENZENE, AND CARBON TETRACHLORIDE AND CONTAINING AT LEAST ONE VULCANIZING AID SELECTED FROM THE GROUP CONSISTING OF LEAD OXIDE, BENZIDINE AND N-CYCLOHEXYL-2-BENZOTHIAZOL-SULFENAMIDE, THE SOLUTION HAVING A COPOLYMER CONCENTRATION OF 3% TO 20% AND A VISCOSITY SUCH THAT BETWEEN 600 AND 1200 SECONDS ARE REQUIRED FOR A STAINLESS STEEL SPHERE WEIGHTING 0.1295 GRAM TO FALL VERTICALLY THROUGH 10 CENTIMETERS OF THE SOLUTION.

Claim 6

A SPINNING SOLUTION CONSISTING ESSENTIALLY OF A SULFOCHLORINATED COPOLMER OF ETHYLENE AND PROPYLENE CONTAINING, IN THE SULFOCHLORINATED STATE, FROM 0.2% TO 3.0% OF COMBINED SULFUR AND AT LEAST 1.4% BUT LESS THAN 10% OF COMBINED CHLORINE, WHICH COPOLYMER IS CHARACTERIZED IN THAT, PRIOR TO SULFOCHLORINATION, IT IS LINEAR, AMORPHOUS UNDER X-RAY ANALYSIS, ESSENTIALLY FREE OF HOMOPOLYMERS, CONTAINS FROM 5% TO 70% OF ETHYLENE BY WEIGHT IN THE COPOLYMER MOLECULE, SHOWS, IN THE INFRARED SPECTRUM THEREFOR, BANDS BETWEEN 13.4 MICRONS AND 13.8 MICRONS, AND HAS A MOLECULAR WEIGHT ABOVE 20,000, DISSOLVED IN A SOLVENT THEREFOR SELECTED FROM THE GROUP CONSISTING OF BENZENE, CHLOROBENZENE, AND CARBON TETRACHLORIDE AND CONTAINING AT LEAST ONE VULCANIZING AID SELECTED FROM THE GROUP CONSISTING OF LEAD OXIDE, BENZIDINE AND N-CYCLOHEXYL-2-BENZOTHIAZOL-SULFENAMIDE, THE SOLUTION HAVING A COPOLYMER CONCENTRATION OF 3% TO 20% AND A VISCOSITY SUCH THAT BETWEEN 600 AND 1200 SECONDS ARE REQUIRED FOR A STAINLESS STEEL SPHERE WEIGHTING 0.1295 GRAM TO FALL VERTICALLY THROUGH 10 CENTIMETERS OF THE SOLUTION.