Chitosan derivatives useful in compositions for coating feedstuf

Details Chitosan derivatives useful in compositions for coating feedstuf Chitosan derivatives useful in compositions for coating feedstuf

1989-11-29

1991-12-31

Griffin, Ronald W.

Drug, bio-affecting and body treating compositions

Preparations characterized by special physical form

Specially adapted for ruminant animal

424439, 424442, 424463, 424489, 424490, 424493, 424499, 514 55, 536 20, 106162, A61K 936, A61K 914, A61K 31715, A61K 4736

Patent

active

050770527

ABSTRACT:
Novel organosoluble derivatives of chitosan, useful in coating biologically active feedstuff additives intended for ruminants, to provide coatings which are stable at a pH greater than 5 and which release the biologically active substance at a pH below 3.5, consist of a random chain of units represented by the formulae: ##STR1## in which: R.sub.1 represents an alkylcarbonyl radical (2 to 4 carbon atoms), R.sub.2 represents an alkyl radical (2 to 21 carbon atoms) or an optionally substituted phenyl radical, and R.sub.3 and R.sub.4 represent a hydrogen atom or alkylcarbonyl radicals (2 to 4 carbon atoms).

REFERENCES:
patent: 4424346 (1984-01-01), Hall et al.
Agricultural and Biological Chemistry, vol. 47, No. 6, 1983, pp. 1389-1391.
Hirano et al.; Carbohydrate Research 65:166-168 (1978).
Fujii et al.; Carbohydrate Research 83:389-393 (1980).

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