Tertiary amide terminated polyamides and uses thereof

C - Chemistry – Metallurgy – 08 – F

Patent

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Details

C08F 20/54 (2006.01) C07C 233/36 (2006.01) C08G 69/34 (2006.01) C08G 69/48 (2006.01) C11C 5/00 (2006.01)

Patent

CA 2360096

A low molecular weight, tertiary amide terminated polyamide may be blended with a liquid hydrocarbon to form a transparent composition having gel consistency. The tertiary amide terminated polyamide may be prepared by reacting "x" equivalents of dicarboxylic acid wherein at least 50 % of those equivalents are from polymerized fatty acid, "y" equivalents of diamine such as ethylene diamine, and "z" equivalents of a monofunctional reactant having a secondary amine group as the only reactive functionality. The stoichiometry of the reaction mixture is preferably such that 0.9 <= {x/(y+z)} <= 1.1 and 0.1 <= {z/(y+z)} <= 0.7. The gel contains about 5-50 % tertiary amide terminated polyamide, with the remainder preferably being pure hydrocarbon. The gels are useful in formulating personal care products and other articles wherein some degree of gel-like or self-supporting consistency is desired.

Selon cette invention, des polyamides à terminaison d'amides tertiaires à faible poids moléculaire peuvent être mélangés avec un hydrocarbure liquide pour former une composition transparente ayant une consistance de gel. On peut préparer le polyamide à terminaison d'amides tertiaires en faisant réagir "x" équivalents de l'acide dicarboxylique si au moins 50 % de ces équivalents proviennent de l'acide gras polymérisé, "y" équivalents de diamine et "z" équivalents d'un réactif monofonctionnel possédant un groupe aminé secondaire en tant que seule fonctionnalité réactive. La stoechiométrie du mélange de réaction satisfait de préférence à 0,9 </= {x/(y+z)} </= 1,1 et à 0,1 </= {z/(y+z)} </= 0,7. Le gel contient d'environ 5 à environ 50 % de polyamide à terminaison d'amides tertiaires, le reste étant constitué par l'hydrocarbure pure. Les gels sont utiles dans la préparation de produits de beauté et d'autres articles dans lesquels on désire obtenir une certaine consistance, de type de gel ou autoporteuse.

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