Improvements in travellers for ring spinning machines and the like
Imidochlorides having one of the general formulae <FORM:0999830/C2/1> where each of R, R1, R11 and R111 (these being identical or two or more of them being different) represents an alkyl group; <FORM:0999830/C2/2> where R represents an aryl group and R1 an alkyl group; <FORM:0999830/C2/3> where each of R and R1 (being the same or different) represents an alkyl group and R11 represents an aryl group; <FORM:0999830/C2/4> where R represents hydrogen or an alkyl group and R1 represents an alkyl or aryl group; <FORM:0999830/C2/5> where R represents an alkyl group; and <FORM:0999830/C2/6> and/or the hydrochlorides thereof, are prepared by reacting phosgene in the liquid phase and under anhydrous or substantially anhydrous conditions with the corresponding N-mono-substituted carboxylic acid amide. The invention also comprises the compounds of the general Formulae (c) and (e) above, and the hydrochlorides thereof. The reaction is conducted in such a way that at all or substantially all times during the course of the reaction there is at least one mole of phosgene present per mole of acid amide, with the proviso that in the event that the carbon atom of the carbonamide group is bound directly to hydrogen or is bound to a carbon atom to which one or more hydrogen atoms are bound, then the said molar ratio does not exceed 2:1. The reaction is preferably conducted in an inert solvent. The imidochlorides may be reacted with primary or secondary amines to give amidines or with a chlorinating followed by hydrolysis of the product to give a ,a -dichloro-amides ora ,a -dichloro-lactams. Examples are given.ALSO:A traveller for ring-spinning comprises a body of plastics material and a hook with a stem detachably mounted in the body. The body may be of polyancide or P.T.F.E. and the stem of hardened metal or sintered ceramic material; in the latter case an eye may be formed by making an aperture in the sintered material. The hook may be embedded in the body during the moulding of the latter or be attached subsequently.