A process for the production of a water-resisting finish on fibrous materials

摘要

Fibrous materials such as artificial silk are rendered water-resisting by impregnation with the reaction products of high molecular quaternary ammonium bases or salts on high molecular acid alkyl esters of polybasic strong inorganic acids or their alkali salts. The impregnation may be effected with a mixture of the separately prepared solutions or the two solutions may be applied separately in either sequence. The quaternary ammonium salts have a minimum molecular weight of about 120 and may be those of the aliphatic, aromatic, aliphatic-aromatic, hydroaromatic or heterocyclic series, such as those derived from acylated derivatives of ethylene diamine, and prepared, for example, by treating the diamines with alkyl sulphates such as di-amyl sulphate or with chlorinated, brominated or iodated paraffins, naphthenes or petroleum or tar fractions. The high molecular acid alkyl esters contain at least 8 carbons atoms in the molecule and comprise dodecyl, hexadecyl, octadecyl, and octadecenyl sulphuric acid esters, ceryl sulphuric acid esters and the corresponding derivatives of ricinoleic alcohol, linoleic alcohol, secondary and tertiary aliphatic alcohols, aromatic, hydroaromatic, and heterocyclic alcohols. Alkyl phosphates or their alkali salts may also be used. In examples: (1) artificial silk is treated with an aqueous solution containing octadecylpyridinium chloride, hexadecyl sulphuric acid ester and octadecyl sulphuric acid ester; (2) viscose artificial silk is treated firt with an aqueous solution of octadecylpyridinium chloride and then with an aqueous solution of the sodium salt of octadecyl sulphuric acid ester; (3) viscose artificial silk is impregnated first with an aqueous solution of hexadecylpyridinium bromide and then with an aqueous solution of the sodium salt of tetradecyl sulphuric acid ester.