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US 4,663,159 AGranted
Hydrophobe substituted, water-soluble cationic polysaccharides
AssigneeUnion Carbide Corporation
InventorsGeorge L. Brode, II, Russell L. Kreeger, Errol D. Goddard, Frederick M. Merritt, II, David B. Braun
Life of this patent
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Abstract
Water-soluble, cationic polysaccharides, including quaternary nitrogen-containing cellulose ethers, containing hydrophobic substitution, are substantially water-soluble; provide aqueous solutions having enhanced viscosity, foaming and preferably improved surface properties; and possess utility in personal care, emulsions and cleansers.
Claims39
A water-soluble, quaternary nitrogen-containing polysaccharide represented by the overall structural formula:
- ##STR15## wherein:
- ##STR16## R.sub.sacch is the residue of a polysaccharide repeat unit;
- z is from 50 to about 20,000;
- and
- each R.sub.1, R.sub.2 and R.sub.3 is individually represented by the substituent structural formula:
- ##STR17## wherein:
- A is an anion;
- a is an integer of from 1 to about 3;
- m is an integer of from 0 to about 6;
- n is an integer of from 0 to about 3, provided that the level of cationic substitution, CS, defined by the average moles of quaternary nitrogen atoms per mole polysaccharide repeat unit is greater than 0;
- p is an integer of from 0 to about 6;
- q is 0 or 1;
- each R.sub.5 and R.sub.7 is individually ethylene, a propylene or a hydroxypropylene;
- R.sub.6 is a di- or trivalent, branched or straight chain, saturated or unsaturated hydrocarbon having from 2 to about 4 carbon atoms, provided there are at least 2 carbon atoms between the nitrogen atom and any oxygen atom;
- R.sub.8 is hydrogen, hydroxyl, R.sub.h, carboxyl or alkali metal or amine carboxylate, provided that when q is 0 then R.sub.8 is hydrogen or R.sub.h ;
- each R.sub.9, R.sub.10 and R.sub.11 is individually R.sub.h, alkyl, aryl, aralkyl, alkaryl, cycloalkyl, alkoxyaryl or alkoxyalkyl, having at least two carbon atoms separating the oxygen atom in the alkoxyaryl or alkoxyalkyl group from the nitrogen atom;
- R.sub.h is a hydrophobic group containing an alkyl group having at least 8 carbon atoms;
- v is equal to the valence of A;
- y is 0 or 1, provided that when y is 0 then p and q are 0 and R.sub.8 is hydrogen;
- with the proviso that at least one R.sub.h group is present such that the extent of hydrophobic group substitution, HS, defined by the average moles of said hydrophobic groups per mole of polysaccharide repeat unit, is greater than 0 and is sufficient to provide for enhanced viscosification and foaming of aqueous solutions containing the polysaccharide.
17 more elements
A water-soluble, quaternary nitrogen-containing polysaccharide represented by the overall structural formula:
- ##STR19## wherein:
- Q is ##STR20## R.sub.sacch is the residue of a polysaccharide repeat unit;
- z is from 50 to about 20,000;
- and
- each R.sub.1, R.sub.2 and R.sub.3 is individually represented by the substituent structural formula:
- ##STR21## wherein:
- A is an anion;
- a is an integer of from 1 to about 3;
- m is an integer of from 0 to about 6;
- n is an integer of from 0 to about 3, provided that the level of cationic substitution, CS, defined by the average moles of quaternary nitrogen atoms per mole polysaccharide repeat unit is greater than 0;
- p is an integer of from 0 to about 6;
- q is 0 or 1;
- each R.sub.5 and R.sub.7 is individually ethylene, a propylene or a hydroxypropylene;
- R.sub.6 is a di- or trivalent, branched or straight chain, saturated or unsaturated hydrocarbon having from 2 to about 4 carbon atoms, provided there are at least 2 carbon atoms between the nitrogen atom and any oxygen atom;
- R.sub.8 is hydrogen, hydroxyl, R.sub.h, carboxyl or alkali metal or amine carboxylate, provided that when q is 0 then R.sub.8 is hydrogen or R.sub.h ;
- each R.sub.9, R.sub.10 and R.sub.11 is individually R.sub.h, alkyl, aryl, aralkyl, alkaryl, cycloalkyl, alkoxyaryl or alkoxyalkyl, having at least two carbon atoms separating the oxygen atom in the alkoxyaryl or alkoxyalkyl group from the nitrogen atom;
- R.sub.h is a hydrophobic group containing a alkyl group having at least 8 carbon atoms;
- v is equal to the valence of A;
- y is 0 or 1, provided that when y is 0 then p and q are 0 and R.sub.8 is hydrogen;
- with the proviso that at least one R.sub.h is persent such that the extent of hydrophobic group substitution, HS, defined by the average moles of said hydrophobic groups per mole of polysaccharide repeat unit, is greater than 0;
- and
- wherein R.sub.h is present as (1) at least one R.sub.8 ;
- (2) at least one R.sub.9, R.sub.10 or R.sub.11 as a hydrophobic group containing an alkyll group having at least about 12 carbon atoms;
- or (3) both (1) and (2).
21 more elements
Dependencies are inferred from the claim text.