Polysaccharide esters containing acetal and aldehyde groups

Details Polysaccharide esters containing acetal and aldehyde groups Polysaccharide esters containing acetal and aldehyde groups

C - Chemistry, Metallurgy

08

B

260/212, 9/42

C08B 3/00 (2006.01) C08B 3/14 (2006.01) C08B 13/00 (2006.01) C08B 31/00 (2006.01) C08B 31/04 (2006.01) C08B 37/00 (2006.01) D21H 17/24 (2006.01) D21H 21/18 (2006.01)

Patent

CA 1303609

ABSTRACT OF THE DISCLOSURE Polysaccharide esters containing aldehyde and acetal groups having the structural formulas Image and Image are prepared by reacting a polysaccharide, such as a starch, gum, or cellulose, with an acetal-containing reagent which contains a functional group reactive with the hydroxyl groups of the polysaccharide; Z is a multivalent organic group; A and A' are independently a lower alkyl or together form at least a 5-membered cyclic acetal; x is at least 1; and y is at least 1. When x is >1 the esters are crosslinked. Typical reagents for introducing the acetal group include 3,3-diethoxypropionyl guanidine (itself a novel compound) and 4-(methylaminoacetaldehyde dimethyl acetal)-4-oxo-butanoic acid). The derivatives are useful in conventional applications such as coatings, adhesives, paper additives and foodstuffs.

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