Substitutes for modified starch in paper manufacture

Details Substitutes for modified starch in paper manufacture Substitutes for modified starch in paper manufacture

C - Chemistry, Metallurgy

12

N

C12N 15/82 (2006.01) C08B 37/00 (2006.01) C12N 9/10 (2006.01) C12P 19/04 (2006.01) C12P 19/18 (2006.01) D21H 17/00 (2006.01) D21H 17/24 (2006.01) D21H 19/00 (2006.01) D21H 21/16 (2006.01)

Patent

CA 2257623

The present invention provides methods of making paper utilizing glucans, produced by glucosyltransferase D enzymes of the species Streptococcus mutans, instead of modified starches. The present glucans are functionally similar to the hydroxethyl modified starch and are particularly useful in the sizing and coating steps of paper manufacture. The present glucans also exhibit thermoplastic properties and impart gloss to the paper during the coating step.

Cette invention se rapporte à des procédés de fabrication du papier qui utilisent des glucanes, produits par les enzymes glucosyltransférases D de l'espèce Streptococcus mutans, au lieu d'amidons modifiés. Ces glucanes sont fonctionnellement similaires à l'amidon modifié hydroxéthyle et ils sont particulièrement utiles dans les étapes d'encollage et d'enduction lors de la fabrication du papier. Ces glucanes possèdent également des propriétés thermoplastiques et confèrent un effet glacé au papier pendant l'étape d'enduction.

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