Antidandruff shampoo compositions

Claim 1

An antidandruff shampoo composition in lotion form comprising: (a) from about 5% to about 70% of a synthetic surfactant; (b) from about 0.3% to about 2% of 1-hydroxy-2-pyridinethione metal salt in platelet form having a mean particle size of from about 2 microns to about 15 microns; (c) from about 0.5% to about 5% of a synergizer selected from the group consisting of: (1) polyethylene glycols having the formula H(O--CH.sub.2 --CH.sub.2).sub.n OH wherein n is from about 6 to about 22; (2) polypropylene glycols having the formula ##STR8## wherein n is from about 6 to about 22; (3) polyethoxy/polypropoxy block copolymers; (5) ethoxylated nonylphenols having the formula C.sub.9 H.sub.19 C.sub.6 H.sub.4 (OCH.sub.2 CH.sub.2).sub.n OH wherein n is from about 40 to about 50; (6) polyethylene oxide fatty glycerides having the formula ##STR9## wherein (EO) represents an ethoxy group and each n is independently from about 0 to about 9, with the total number of ethoxy groups in the compound being not less than 1. (7) polyethylene oxide carbohydrates having the formula ##STR10## wherein the total of v+w+x+y is from about 4 to about 20, and z is from about 10 to about 18. (8) ethoxylated straight chain alcohols having the formula R(OCH.sub.2 CH.sub.2).sub.n OH wherein R represents a blend of cetyl and stearyl radicals, and n is from about 20 to about 55; and (9) mixture thereof; (d) from about 0.5% to about 6% of a suspending agent; and (e) the remainder water.