Process for oxidising dialdehyde polysaccharides

Details Process for oxidising dialdehyde polysaccharides Process for oxidising dialdehyde polysaccharides

C - Chemistry, Metallurgy

08

B

C08B 37/00 (2006.01) B01F 17/00 (2006.01) C07H 1/00 (2006.01) C08B 15/00 (2006.01) C08B 15/02 (2006.01) C08B 15/06 (2006.01) C08B 31/00 (2006.01) C08B 31/18 (2006.01) C08L 1/02 (2006.01) C08L 1/04 (2006.01) C08L 1/08 (2006.01) C08L 3/04 (2006.01) C08L 3/10 (2006.01) C08L 5/00 (2006.01) C12P 19/00 (2006.01) C12P 19/04 (2006.01)

Patent

CA 2466361

Dialdehyde carbohydrates such as dialdehyde starch (DAS) can be oxidised with oxygen or hydrogen peroxide in the presence of a laccase or another enzyme capable of oxidation. The oxidation is mediated by a di-tertiary nitroxyl such as TEMPO. The products contain both aldehyde groups and carboxyl groups and have excellent properties as wet strength agents.

Des glucides de dialdéhyde tels que l'amidon dialdéhyde (DAS) peuvent être oxydés avec du peroxyde d'oxygène ou d'hydrogène en la présence d'une laccase ou d'une autre enzyme capable d'une oxydation. L'oxydation est médiée par un nitroxyle di-tertiaire tel que TEMPO. Les produits contiennent à la fois des groupes aldéhyde et des groupes carboxyle et ils présentent d'excellentes propriétés en tant qu'agents de résistance à l'état humide.

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