Patent ID: 7459422

Claim:
A substrate composition comprising a spray dried composite composition comprising from 35 wt % to about 60 wt % of a water-soluble and/or water-dispersible polymer and from 20 wt % to about 80 wt % of a water-soluble inorganic salt, wherein the substrate composition has a median particle size of from about 1 micrometers to about 100 micrometers, and wherein the substrate composition comprises less than about 10 wt % of water-insoluble material, wherein the water-soluble and/or water-dispersible polymer is selected from the group consisting of polyacrylic acid polymer, polymaleic acid polymer, polyacrylic-maleic copolymer, salts thereof and mixtures thereof; and wherein the water soluble inorganic salt is selected from the group consisting of a carbonate, a silicate and mixtures thereof.