Reduced molecular weight native gellan gum

C - Chemistry – Metallurgy – 08 – B

Patent

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Details

C08B 37/00 (2006.01) C08L 5/00 (2006.01)

Patent

CA 2351319

This invention provides reduced molecular weight gellan gums. The reduced molecular weight gellan gums of this invention generally have a weight average molecular weight less than about 1.7 X 106, and typically in a range of about 1.2 X 106 to about 9.3 X 105. This invention also provides compositions, e.g., solutions and gels, comprising reduced molecular weight gellan gums. The reduced molecular weight gellan gums of this invention may be prepared by any method which reduces the molecular weight of polymers. Such methods include homogenization, sonication, radiation, oxidation and hydrolysis.

L'invention concerne des gommes gellane à poids moléculaire réduit qui ont généralement un poids moléculaire moyen en poids inférieur à environ 1,7 X 10?6¿, et compris plus précisément dans une plage allant entre environ 1,2 X 10?6¿ et environ 9,3 X 10?5¿. L'invention concerne également des compositions, par exemple des solutions et des gels, comprenant des gommes gellane à poids moléculaire réduit. Les gommes gellane à poids moléculaire réduit selon l'invention peuvent être préparées à l'aide de n'importe quel procédé permettant de réduire le poids moléculaire de polymères. Parmi ces procédés, on compte l'homogénéisation, le traitement par ultrasons, le rayonnement, l'oxydation et l'hydrolyse.

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