Patent GB-1058796-A (GB)
Title: Process for finishing filamentary materials made from high molecular weight linear polyesters for improving their properties, in particular their dyeability
IPC: D06P1/651
Filed: 1963-12-24
Abstract: A process for improving the dyeability of filamentary materials of high molecular weight linear polyesters of polybasic acids and polyhydric alcohols, comprises treating the filamenary material at a temperature of above 200 DEG C. with an ether or ester having in the molecule at least one free reactive hydroxyl group and at least one aliphatic or cycloaliphatic radical containing 8 to 22 carbon atoms, or an aromatic or aliphatic-aromatic radical containing one to two benzene rings and up to 18 carbon atoms in the aliphatic radical. The ester and/or ether used may contain a polyether group having two to 20 monomeric units, and there may be used an aliphatci compound containing a polyether group the monomeric units of which correspond to the formula: <FORM:1058796/D1-D2/1> in which R represents hydrogen or a methyl group.  Suitably, an aliphatic compound containing a polyether group having 2 to 10 monomeric units is used.  An ester and/or ether or a polyhydric alcohol may be used, at least one hydroxyl group of the alcohol being free.  Thus a compound containing a plurality of up to 20 ester and/or ether groups in addition to at least one free hydroxyl group in the same molecule may be used.  A mixture of ethers and/or esters may alternatively be employed.  As basic molecules for forming the compounds to be used in the process, there may be used for example, mono- or polybasic higher molecular weight carboxylic acids containing 8 to 22 carbon atoms, for example, lauric acid, oleic acid, ricinoleic acid, sebacic acid, stearic acid or behenic acid or mono- or polyhydric aliphatic branched or unbranched alcohols containing 8 to 12 carbon atoms or phenols and naphthols.  As polyalcohols or alkylene oxides from which the ester or ether grouping may be derived, there may be used, ethylene glycol or ethylene oxide, 1,2-propylene oxide, glycerine, hexanetriol, pentaerythritol or sorbitol.  In place of single compounds, there may be used the reaction products of lauric acid or oleic acid or olelyl alcohol with 4,6,8, 10 or 20 mols of ethylene oxide; the reaction product of glycerin monolaurate with 5 mols of ethylene oxide; the polyether of nonyl phenol and, for example, 6 to 10 mols of ethylene oxide; monophenyl octglycol ether or lauric acid sorbitol ester, or mixtures of such compounds.  The filamentary material may be allowed to shrink during the heat treatment by a determined amount, suitably up to 40%.  Before being heated to a temperature above 200%C. the material may be impregnated with a solution of the ether or ester containing 20 to 100 grams per litre at a temperature within the range of 20 to 90 DEG C.  The heat treatment is suitably effected at from 200 to 350 DEG C., especially 210 to 280 DEG C., suitably for a period up to one second or from one second to 30 seconds.  Treatment improves the affinity of the treated material for dispersion dyestuffs.  Examples are given.  In a test dyeing process, 4 grams of fibre are dyed for one hour at 98 to 100 DEG C in 200 cc of a dyebath containing 3%, based on the fibre weight, of the dyestuff Colour Index No. 62,030 and the fibre sample is then thoroughly rinsed with warm water, the rinsing liquid and the bath combined methanol added to a portion of the resulting liquid and the solution transferred to the colorimeter.  Fibres so treated show enhanced dyeability, and have a good anti-static finish which is retained after mild washing at 45 DEG C.