Method of dyeing synthetic fibrous materials

Claim 1

A METHOD CAPABLE OF LEVEL DYEING A HYDROPHOBIC SYNTHETIC FIBER WITHOUT PREPADDING WHICH COMPRISES, FORMING A STORAGE-STABLE, OIL-IN-WATER TYPE EMULSION COMPRISING WATER, AN ANIONIC SURFACE-ACTIVE EMULSIFYING AGENT, AND AS THE INTERNAL PHASE, A LOWER ALKYL ESTER OF A CARBOCYCLIC AROMATIC MONOCARBOXYLIC ACID HAVING NOT MORE THAN TWO CARBOCYCLIC RINGS, THE WEIGHT RATIO OF SAID EMULSIFYING AGENT TO SAID ESTER BEING FROM ABOUT 1:50 TO 1:2; COMBINING A MINOR AMOUNT OF RESULTANT STORAGE-STABLE EMULSION AND A MAJOR AMOUNT OF AN AQUEOUS MEDIUM CONTAINING A DYE CAPABLE OF DYEING SAID FIBRES, WHEREBY AN EXTENDED EMULSION IS FORMED; AND THEN, AT A TEMPERATURE BETWEEN ABOUT 160* F. AND ABOUT THE BOILING POINT OF SAID EXTENDED EMULSION, TREATING SAID FIBRES WITH SAID EXTENDED EMULSION, WHEREBY SAID EMULSION IS BROKEN AND LEVEL DYEING OF SAID FIBERS IS OBTAINED.