Method for preparing gels

Details Method for preparing gels Method for preparing gels

C - Chemistry, Metallurgy

08

L

C08L 67/04 (2006.01) C08J 3/075 (2006.01)

Patent

CA 2467275

The formation of a cream and gel is described using a biopolymer, such as a polyhydroxyalkanoate (PHA), a polylactide (PLA), a polylactideglycolide (PLGA) and a polyglycoside (PGA), or a derivative thereof, in a latex form with the addition of a binder, which is generally an amphiphilic chemical entity. An hydrophobic domain of the amphiphilic chemical entity interacts with at least one biopolymer forming a water soluble complex, while the hydrophilic domain of the amphiphilic chemical entity maintains the soluble complex in suspension in an aqueous solution, which after proper heating becomes a gel or a cream. As a result, a versatile gel or cream is created with different compositions and textures that are obtained based on the nature of the binder used and the ratio of biopolymers and binder(s).

L'invention concerne la formation d'une crème et d'un gel au moyen d'un biopolymère, tel qu'un polyhydroxyalcanoate (PHA), un polylactide (PLA), un polylactideglycolide (PLGA) et un polyglycoside (PGA), ou un de leurs dérivés, sous forme de latex avec l'apport d'un liant consistant généralement en une entité chimique amphiphile. Un domaine hydrophobe de cette entité chimique amphiphile entre en interaction avec au moins un biopolymère, ce qui constitue un complexe soluble dans l'eau, tandis que le domaine hydrophile de l'entité chimique amphiphile maintient le complexe soluble en suspension dans une solution aqueuse devenant un gel ou une crème suivant un réchauffement approprié. On peut, de ce fait, créer un gel ou une crème polyvalent(e) possédant différentes compositions et textures qu'on obtient en fonction de la nature du liant utilisé et du rapport entre les biopolymères et le liant.

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