Waterless self-emulsifiable biodegradable chemical softening...

D - Textiles – Paper – 21 – H

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D21H 17/06 (2006.01) D21H 17/07 (2006.01) D21H 17/14 (2006.01) D21H 21/22 (2006.01) D21H 27/30 (2006.01)

Patent

CA 2162850

Substantially waterless self-emulsifiable biodegradable chemical softening compositions are provided comprising a mixture of an ester-functional quaternary ammonium compound and a polyhydroxy compound. Preferred biodegradable ester-quaternary ammonium compound include diesterdialkyl dimethyl ammonium salts such as diester ditallow dimethyl ammonium chloride, diester di(touch hydrogenated)tallow dimethyl ammonium chloride and diester di(hydrogenated)tallow dimethyl ammonium chloride. Preferred polyhydroxy compounds are selected from the group consisting of glycerol, polyglycerols having a weight average molecular weight from about 150 to about 800 and polyoxyethyle glycols and polyoxypropylene glycols having a weight average molecular weight from about 200 to about 4000. The substantially waterless self-emulsifiable biodegradable chemical softening compositions are prepared by mixing the ester-functional quaternary ammonium compound with the polyhydroxy compound at a specific temperature range wherein the polyhydroxy compound is miscible with the ester-functional quaternary ammonium compound. The resulting stable solid or concentrated fluid mixture can then be economically shipped to the consumer or ultimate user. The ultimate users of the chemical softening composition simply dilute the mixture with a liquid carrier (e.g., water) to form an aqueous dispersion suitable for treating fibrous cellulosic material. The substantially waterless self-emulsifiable biodegradable chemical softening compositions disclosed herein are primarily intended for softening disposable paper products such as tissues and towels.

Composition d'adoucissant chimique autoémulsifiant et biodégradable, pratiquement exempt d'eau, comportant un mélange d'un composé d'ammonium quaternaire à fonction ester et d'un composé polyhydroxy. Les composés biodégradables d'ammonium quaternaire à fonction ester préférés comprennent des sels de diester dialkyl diméthyl ammonium tels que le chlorure de diester disuif diméthyl ammonium, le chlorure de diester disuif (faiblement hydrogéné) diméthyl ammonium et le chlorure de diester disuif (hydrogéné) diméthyl ammonium. Les composés polyhydroxy préférés sont choisis dans un groupe constitué de glycérol, de polyglycérols d'un poids moléculaire moyen compris entre environ 150 et 800, et de polyoxyéthylène-glycols et de polyoxypropylènes-glycols d'un poids moléculaire moyen compris entre environ 200 et 4000. Lesdits adoucissants s'obtiennent en mélangeant le composé d'ammonium quaternaire à fonction ester au composé polyhydroxy dans une plage de températures spécifique où le second est miscible avec le premier. Il en résulte un mélange stable, solide ou sous forme de concentré liquide, facile à expédier au consommateur ou à l'utilisateur final qui n'ont plus qu'à le diluer dans un excipient liquide (p. ex. de l'eau) pour former une dispersion aqueuse se prêtant au traitement des produits fibreux cellulosiques. Les adoucissants autoémulsifiants et biodégradables, pratiquement exempts d'eau présentés ici sont principalement destinés à l'adoucissement de produits en papier jetables tels que mouchoirs et serviettes.

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