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Abstract

Abstract A PROCESS WHERE AN EMULSION CONTAINING A FLAME RETARDER IS APPLIED TO THE SURFACE OF A POLYESTER FIBER AND THE FIBER IS SUBSEQUENTLY HEATED TO DIFFUSE THE FLAME RETARDER INTO THE FIBER. THE EMULSION CONSISTS ESSENTIALLY OF: (A) WATER, (B) AN EMULSIFIER SYSTEM WHICH IS A POSITIVE AND NEGATIVE ION IN DISSOCIATION EQUILIBRIUM WHEREIN: (1) THE POSITIVE ION IS AN ALKALI METAL ION, OR AN ION CORESPONDING TO THE STRUCTURE ((R-)3NH)+1 WHEREIN R IS H OR AN ORGANIC RADICAL HAVING FROM 1 TO 20 CARBON ATOMS, AND (2) THE NEGATIVE ION IS AN ION CORRESPONDING TO THE STRUCTURE ((R1-O-)2P(=O)-O-)-1 WHEREIN R1 IS A MONOVALENT ALIPHATIC RADICAL HAVING 8 TO 20 CARBON ATOMS, AND (C) BASED ON THE WEIGHT OF (A), (B) AND (C), FROM 50 TO 90 WEIGHT PERCENT OF A FLAME RETARDER WHICH CAN BE (1) AN ALIPHATIC, ALICYCLIC OR AROMATIC COMPOUND OF AT LEAST 6 CARBOND AND CONTAINING FROM ABOUT 40-85 WEIGHT PERCENT HALOGEN, OR (2) AN ALIPHATIC, ALICYCLIC OR AROMATIC PHOSPHORUS COMPOUND OF AT LEAST 6 CARBON ATOMS AND CONTAINING FROM ABOUT 40-85 WEIGHT PERCENT HALOGEN, WHEREIN THE PH OF THE EMULSION IS IN THE RANGE OF 1-7, THE VISCOSITY OF THE EMULSION IS IN THE RANGE OF 2,00050,000 CENTIPOISE, AND THE EMULSION IS STABLE FOR AT LEAST 100 DAYS. THE FLAME RETARDER CAN BE TRIS(2,3-DIBROMOPROPYL)PHOSPHATE, BIS(2 - BROMOETHYL) 2,5 - DIBROMOPHENYL PHOSPHATE, BIS(BROMOCHLOROPROPYL) BROMOCHLOROPROPYL PHOSPHONATE, TRIS(DIBROMOPHENYL) PHOSPHATE, DI(2,3-DIBROMOPROPYL) TRIBROMOPHENYL PHOSPHATE, N, N'', N" TRIS(2,3-DIBROMOPROPYL) PHOSPHORIC TRIAMIDE OR ((BR-)3-PHENYL)-O-P(=O)(-NH-CH2-CH2-BR)2 (R1-O-P(=O)(-O-)2)-2 (R1-O-S(=O)(=O-)(-O-))-1 ACCORDING TO THE PROCESS, THE FIBER IS HEATED IN A TEMPERATURE RANGE OF ABOUT 175-220*C. FOR A SUFFICIENT TIME TO CAUSE A PORTION OF THE FLAME RETARDER TO DIFFUSE INTO THE FIBER STRUCTURE. THE FIBER CAN BE POLY(EHYLENE TEREPHTHALATE) OR POLY(1,4-CYCLOHEXYLENEDIMETHYLENE TEREPHTHALATE).

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