Acetals useful for the preparation of polysaccharide derivatives

Details Acetals useful for the preparation of polysaccharide derivatives Acetals useful for the preparation of polysaccharide derivatives

1988-12-28

1991-01-08

Rollins, John W.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

549553, 549554, 549555, 564209, 564291, 564292, 568596, C07D30308, C07D30312

Patent

active

049837486

ABSTRACT:
Polysaccharide aldehydes having the formula Sacch--O--CH.sub.2 --CH.dbd.CH--CHO, Saach--O--CH.sub.2 --C.tbd.C--CHO, ##STR1## starch, cellulose, and gum aldehydes, are useful for imparting wet, dry, or temporary wet strength to paper. They are prepared by a non-oxidative method which involves reacting the polysaccharide base, in the presence of alkali, with a derivatizing acetal reagent having the general structure ##STR2## and then hydrolyzing the acetal by adjusting the pH to less than 7, preferably 2-4. In the formulas, n is 1-3; R.sup.11 and R.sup.12 are independently an alkyl, aryl, aralkyl, or alkaryl group when n is 1, R.sup.11 or R.sup.12 is one of the groups when n is 2, or R.sup.11 and R.sup.12 are not present when n is 3; R.sup.13 is an alkyl group, optionally containing an ether linkage, or an aralkyl group; R.sup.14 and R.sup.15 are individually a hydrogen or a methyl group; R.sup.16, R.sup.17, and R.sup.18 are individually an alkyl group; Y.sup.- is an anion; Z is an organic group capable of reacting with the polysaccharide base to form an ether derivative and selected from the group consisting of an epoxide, ethylenically unsaturated group, halohydrin, and halogen; R.sup.19, if present, is a divalent organic group containing no reactive substiuents; and A and A' are lower alkyls or together form at least a 5-membered cyclic acetal.

REFERENCES:
patent: 2698936 (1955-01-01), Staerkle et al.
patent: 2803558 (1957-08-01), Fronmuller
patent: 3062652 (1962-11-01), Jeffreys et al.
patent: 3086969 (1963-04-01), Slager
patent: 3519618 (1970-07-01), Parmerter
patent: 3553193 (1971-01-01), LeRoy et al.
patent: 3632802 (1972-01-01), BeMiller et al.
patent: 3740391 (1973-06-01), Williams et al.
patent: 3978087 (1976-08-01), Renner et al.
patent: 4048435 (1977-09-01), Rutenberg et al.
patent: 4276414 (1981-06-01), Tessler
patent: 4663448 (1987-05-01), Chiu
patent: 4675394 (1987-06-01), Solarek et al.
patent: 4703116 (1987-10-01), Solarek et al.
patent: 4731162 (1988-03-01), Solarek et al.
patent: 4741804 (1988-05-01), Solarek et al.
patent: 4749800 (1988-06-01), Jobe et al.
patent: 4788280 (1988-11-01), Billmers et al.
patent: 4804769 (1989-02-01), Solarek et al.

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