Patent GB-1048197-A (GB)
Title: Method of imparting antistatic properties to synthetic polymeric textile materials
IPC: C07D207/28
Filed: 1964-05-28
Abstract: Di - n - butyl L - aspartate, di - n - octyl L  aspartate, di - n - butyl D - glutamate and di(2 - ethylhexyl) D - glutamate are prepared by saturating a mixture of L-aspartic acid or D glutamic acid and n-butanol, n-octanol or 2 ethyl hexanol with hydrogen chloride gas and heating.  Di-n-butyl N-acetyl-L-aspartate and di - (2 - ethylhexyl) N - acetyl - D - glutamate are prepared by mixing di-n-butyl L-aspartate or di - (2 - ethylhexyl) D - glutamate with acetic anhydride and pyridine and allowing the mixtures to stand until reaction is complete.ALSO:Aqueous compositions suitable for use in the antistatic treatment of synthetic textile materials, e.g. polyester fabrics, comprise either di-n-butyl N-acetyl-D-glutamate, polymethyl or polyethyl acrylate, trimethylol melamine and 2-imino-isopropanol hydrochloride or di-n-butyl N-acetyl-D-glutamate, guanidine phosphateformaldehyde resin and trimethylol melamine. The compositions may be padded on to the textile materials and then cured by heating.ALSO:Compounds having the formula <FORM:1048197/B1-B2/1> or <FORM:1048197/B1-B2/2> in which R1 and R2 are hydrogen or aliphatic or aromatic hydrocarbon radicals except that both are not hydrogen, R3 and R4 are hydrogen or alkyl or acyl groups, R5 is an aliphatic or aromatic hydrocarbon radical and n is 1 or 2, numerous examples of which are given, are dispersed in water with the addition of a polyoxyethylene alkyl ether, e.g. polyoxyethylene oleyl ether.ALSO:Textile materials, e.g. fibres, yarns and fabrics made from synthetic polyesters, nylon, polypropylene or acrylic polymers, are rendered antistatic by treating them with a compound having the formula <FORM:1048197/D1-D2/1> or <FORM:1048197/D1-D2/2> in which R1 and R2 are hydrogen or aliphatic or aromatic hydrocarbon radicals except that both are not hydrogen, R3 and R4 are hydrogen or alkyl or acyl groups, R5 is an aliphatic or aromatic hydrocarbon radical and n is 1 or 2.  Specified compounds are diethyl aspartate, di-n-butylaspartate, di-n-octylaspartate, di-(2-ethylhexyl) aspartate, di-n-butyl N-acetylaspartate, di(2-ethylhexyl) N-acetyl aspartate, dimethyl N-benzoylaspartate, di-n-butyl-N-benzoylaspartate, diethyl-N, N-dimethyl aspartate, di-n-butyl-N, N-dimethyl aspartate, di-(2-ethylhexyl)-N, N-dimethyl aspartate, beta-n-butyl aspartate, beta-benzyl aspartate, beta-benzyl-N-benzoyl aspartate, diethyl glutamate, di-n-butylglutamate, di(2-ethyl hexyl) glutamate, di-n-butyl N-acetyl glutamate, di (2-ethylhexyl) N-acetylglutamate, di-n-butyl N, N-dimethyl glutamate, di-(2-ethylhexyl) N, N-dimethylglutamate, ethyl 2-pyrrolidone-5-carboxylate, n-butyl-2-pyrrolidone-5-carboxylate, n-octyl-2-pyrrolidone-5-carboxylate and 2-ethylhexyl 2-pyrrolidone-5-carboxylate.  The compounds may be applied to the textile materials as solutions in methanol, ethanol or propanol or as aqueous dispersions containing surface active agents such as polyoxyethylene alkyl ethers, by spraying, padding or dipping. The treating compositions may also contain resins, e.g. polyacrylic esters, trimethylol melamine, guanidine phosphate-formaldehyde and epoxy resins and after application of the treating composition the textile materials may be dried and cured.