UST896010I4

UST896010I4 - Defensive publication

Info

Publication number: UST896010I4
Authority: US
Priority date: 1970-11-18
Filing date: 1970-11-18
Publication date: 1972-03-07

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).

Description

LlCllON UNITED STATES PATENT OFFICE Published at the request oi. the applicant or owner in accordance with the Notice of Dec. 16, 1969, S69 O.G. 687. The abstracts of Defensive Publication applications are identified by distinctly numbered series and are arranged chronologically. The heading of each abstract indicates the number of pages of specification, including claims and sheets of drawings contained in the application as originally filed. The files of these applications are available to the public for inspection and reproduction may be purchased for 30 cents a sheet.

Defensive Publication applications have not been examined as to the merits of alleged invention. The Patent Ofiice makes no assertion as to the novelty of the disclosed subject matter.

PUBLISHED MARCH 7, 1972 T896,010 EMULSIONS AND USES THEREOF Wayne W. Lochmaier, 312 Hamilton Drive, Kingsport, Tenn. 37663 Filed Nov. 18, 1970, Ser. No. 90,811 Int. Cl. (309k 3/28 US. Cl. 117-136 No Drawing. 20 Pages Specification 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 corresponding to the structure R +1 RI%IH R 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 R o-i O wherein R is a monovalent aliphatic radical having 8 to 20 carbon atoms, and (C) based on the weight of (A), (B) and (C), from 5090 weight percent of a flame retarder which can be (1) an aliphatic, alicyclic or aromatic compound of at least 6 carbons and containing from about 4085 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 halowherein the pH of the emulsion is in the range of 1-7, the viscosity of the emulsion is in the range of 2,000- 50,000 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-di bromopropyl) tribromophenyl phosphate, N,N',N tris- (2,3-dibromopropyl) phosphoric triamide or According to the process, the fiber is heated in a temperature range of about 175-220 C. for a suflicient time to cause a portion of the flame retarder to diifuse into the fiber structure. The fiber can be po1y(ethylene terephthalate) or poly(1,4-cyclohexylenedimethylene terephthalate).