Stable dispersions of fortified rosin
AssigneeHercules Incorporated
InventorPaul H. Aldrich
Life of this patent
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Abstract
Disclosed are novel aqueous dispersions which consist essentially of finely-divided fortified rosin particles; a water-soluble or water-dispersible cationic starch dispersing agent for the finely-divided fortified rosin particles; an anionic surface-active agent; and water. The novel aqueous dispersions are used to size paper.
Claims9
An aqueous dispersion of fortified rosin consisting essentially of, by weight, (A) from about 5% to about 50% fortified rosin;
- (B) from about 0.5% to about 10% of at least one water-soluble or water-dispersible cationic starch dispersing agent;
- (C) from about 0.1% to 4% of at least one anionic surface active agent;
- and (D) water to 100%, component (B) being selected from
- (I) a cationic starch having the formula ##STR12## wherein R is alkylene, R' and R" are each selected from the group consisting of alkyl, aryl, and aralkyl and n is from about 0.02 to about 0.05, ##STR13## wherein n is as above defined, and (III) starch--(OCH.sub.2 CH.sub.2 NH.sub.2).sub.n where n is above defined, said fortified rosin (A) being the adduct reaction product of rosin and an acidic compound containing the ##STR14## group.
An aqueous dispersion of fortified rosin consisting essentially of, by weight, (A) from about 10% to about 40% fortified rosin;
- (B) from about 1% to about 8% of at least one water-soluble or water-dispersible cationic starch dispersing agent;
- (C) from about 0.2% to 2% of at least one anionic surface active agent;
- and (D) water to 100%, component (B) being selected from
- (I) a cationic starch having the formula ##STR15## wherein R is alkylene, R' and R" are each selected from the group consisting of alkyl, aryl, and aralkyl and n is from about 0.02 to about 0.05, ##STR16## wherein n is as above defined, and (III) starch--(OCH.sub.2 CH.sub.2 NH.sub.2).sub.n where n is above defined, said fortified rosin (A) being the adduct reaction product of rosin and an acidic compound containing the ##STR17## group.
An aqueous dispersion of fortified rosin consisting essentially of, by weight, (A) from about 10% to about 40% fortified rosin;
- (B) from about 1% to about 8% of at least one water-soluble or water-dispersible cationic starch dispersing agent;
- (C) from about 0.2% to 2% of at least one anionic surface active agent;
- and (D) water to 100%, component (B) being selected from a cationic starch having the formula ##STR18## wherein R is alkylene, R' and R" are each selected from the group consisting of alkyl, aryl, and aralkyl and n is from about 0.02 to about 0.05, said fortified rosin (A) being the adduct reaction product of rosin and an acidic compound containing the ##STR19## group.
An aqueous dispersion of fortified rosin consisting essentially of, by weight, (A) from about 10% to about 40% fortified rosin;
- (B) from about 1% to about 8% of at least one water-soluble or water-dispersible cationic starch dispersing agent;
- (C) from about 0.2% to 2% of at least one anionic surface active agent;
- and (D) water to 100%, component (B) being starch--[OCH.sub.2 CH.sub.2 N(C.sub.2 H.sub.5).sub.2 ].sub.n wherein n is from about 0.02 to about 0.05, said fortified rosin (A) being the adduct reaction product of rosin and an acidic compound containing the ##STR20## group.
An aqueous dispersion of fortified rosin consisting essentially of, by weight, (A) from about 10% to about 40% fortified rosin;
- (B) from about 1% to about 8% of at least one water-soluble or water-dispersible cationic starch dispersing agent;
- (C) from about 0.2% to 2% of at least one anionic surface active agent;
- and (D) water to 100%, component (B) being ##STR21## wherein n is from about 0.02 to about 0.05, said fortified rosin (A) being the adduct reaction product of rosin and an acidic compound containing the ##STR22## group.
An aqueous dispersion of fortified rosin consisting essentially of, by weight, (A) from about 10% to about 40% fortified rosin;
- (B) from about 1% to about 8% of at least one water-soluble or water-dispersible cationic starch dispersing agent;
- (C) from about 0.2% to 2% of at least one anionic surface active agent;
- and (D) water to 100%, component (B) being starch--(OCH.sub.2 CH.sub.2 NH.sub.2).sub.n where n is from about 0.02 to about 0.05, said fortified rosin (A) being the adduct reaction product of rosin and an acidic compound containing the ##STR23## group.
Dependencies are inferred from the claim text.