Antistatic treating solution for polyacrylonitrile fibers and method

Claim 1

A METHOD FOR DIMINISHING THE TENDENCY TO ACCUMULATE A CHARGE OF STATIC ELECTRICITY OF POLYACRYLONITRILE FIBERS COMPRISING BY WEIGHT FROM 70 TO 95 PARTS OF AN ACRYLONITRILE POLYMER SELECTED FROM THE GROUP CONSISTING OF POLYACRYLONITRILE AND A COPOLYMER CONTAINING FROM 70 TO 95% OF ACRYLONITRILE AND FROM 30 TO 5% OF ANOTHER POLYMERIZABLE ETHENOID MONOMER SELECTED FROM THE GROUP CONSISTING OF A VINYL ESTER OF A SATURATED FATTY ACID CONTAINING FROM 2 TO 4 CARBON ATOMS, AN ISOPROPENYL ESTER OF A SATURATED FATTY ACID CONTAINING FROM 2 TO 4 CARBON ATOMS, AN ACRYLIC ACID ALKYL ESTER, A METHACRYLIC ACID ALKYL ESTER, VINYL CHLORIDE, VINYLIDENE CHLORIDE, STYRENE AND AMETHYLSTYRENE, AND FROM 30 TO 5 PARTS OF POLY-N-VINYL PYRROLIDONE. SAID METHOD COMPRISING TREATING SUCH FIBERS WITH AN ACIDIC, ABOUT 0.1 TO 10% BY WEIGHT AQUEOUS SOLUTION OF A MIXTURE CONSISTING OF (A) A MIXTURE OF FREE MONO- AND DI- ACID PHOSPHATE ESTERS OF A NONIONIC SURFACE ACTIVE AGENT WHICH IS A CONDENSATION PRODUCT OF AT LEAST ONE MOLE OF AN ALKYLENE OXIDE OF 2 TO 4 CARBON ATOMS WITH ONE MOLE OF AN ALKYL PHENOL CONTAINING 10 TO 61 CARBON ATOMS, AND (B) SALTS OF SAID PHOSPHATE ESTERS WITH ORGANIC AMPHOLYTIC COMPOUNDS CONTAINING AT LEAST ONE BASIC AMINO GROUP AND AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF CARBOXYLIC SULFONIC, PHOSPHORIC AND PHOSPHONIC ACID GROUPS. SAID SALTS BEING PRESENT IN AN AMOUNT INSUFFICIENT TO RAISE THE PH OF SAID SOLUTION ABOVE 4.0 WHEN THE CONCENTRATION OF SAID MIXTURE OF (A) AND (B) IN SAID SOLUTION IS AT LEAST 5% BY WEIGHT, AND THEN DRYING THE TREATED FIBERS TO DEPOSIT THEREON ABOUT 0.05 TO 3% OF SAID MIXTURE OF (A) AND (B) BY WEIGHT OF THE FIBERS.

Claim 2

A METHOD FOR DIMINISHING THE TENDENCY TO ACCUMULATE A CHARGE OF STATIC ELECTRICITY OF POLYACRYLONITRILE FIBERS COMPRISING BY WEIGHT FROM 70 TO 95 PARTS OF AN ACRYLONITRILE POLYMER SELECTED FROM THE GROUP CONSISTING OF POLYACRYLONITRILE AND A COPOLYMER CONTAINING FROM 70 TO 95% OF ACRYLONITRILE AND FROM 30 TO 5% OF ANOTHER POLYMERIZABLE ETHENOID MONOMER SELECTED FROM THE GROUP CONSISTING OF A VINYL ESTER OF A SATURATED FATTY ACID CONTAINING FROM 2 TO 4 CARBON ATOMS, AN ISOPROPENYL ESTER OF A SATURATED FATTY ACID CONTAINING FROM 2 TO 4 CARBON ATOMS, AN ACRYLIC ACID ALKYL ESTER, A METHACRYLIC ACID ALKYL ESTER, VINYL CHLORIDE, VINYLIDENE CHLORIDE, STYRENE AND AMETHYLSTYRENE, AND FROM 30 TO 5 PARTS OF POLY-N-VINYL PYRROLIDONE. SAID METHOD COMPRISING TREATING SUCH FIBERS WITH AN ACIDIC, ABOUT 0.1 TO 10% BY WEIGHT AQUEOUS SOLUTION OF A MIXTURE CONSISTING OF (A) A MIXTURE OF FREE MONO- AND DI- ACID PHOSPHATE ESTERS OF A NONIONIC SURFACE ACTIVE AGENT WHICH IS A CONDENSATION PRODUCT OF AT LEAST ONE MOLE OF AN ALKYLENE OXIDE OF 2 TO 4 CARBON ATOMS WITH ONE MOLE OF AN ALKYL PHENOL CONTAINING 10 TO 61 CARBON ATOMS, AND (B) SALTS OF SAID PHOSPHATE ESTERS WITH ORGANIC AMPHOLYTIC COMPOUNDS CONTAINING AT LEAST ONE BASIC AMINO GROUP AND AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF CARBOXYLIC SULFONIC, PHOSPHORIC AND PHOSPHONIC ACID GROUPS. SAID SALTS BEING PRESENT IN AN AMOUNT INSUFFICIENT TO RAISE THE PH OF SAID SOLUTION ABOVE 4.0 WHEN THE CONCENTRATION OF SAID MIXTURE OF (A) AND (B) IN SAID SOLUTION IS AT LEAST 5% BY WEIGHT, AND THEN DRYING THE TREATED FIBERS TO DEPOSIT THEREON ABOUT 0.05 TO 3% OF SAID MIXTURE OF (A) AND (B) BY WEIGHT OF THE FIBERS.