Cold water dispersible laundry starch

Claim 1

A PROCESS FOR MAKING A COLD WATER DISPERSIBLE DRY LAUNDRY STARCH CONCENTRATE WHIC IS QUICKLY DISPERSIBLE IN COLD WATER WITHOUT COOKING TO FORM A STABLE LAUNDRY STARCH PREPARATION WHICH COMPRISES PREPARING AN AQUEOUS SUSPENSION OF GRANULES OF A WAXY GRAIN STARCH SELECTED FROM THE GROUP CONSISTING OF WAXY GRAIN SORGHUM STARCH, WAXY MAIZE STARCH, AND WAXY RICE STARCH, ADDING AN ALKALI METAL HYPOCHLORITE TO SAID SUSPENSION IN AN AMOUNT, BASED ON THE DRY WEIGHT OF SAID STARCH, EQUIVALENT TO OXIDIZE SAID STARCH TO A CARBOXYL CONTENT OF FROM 0.025 TO 0.12 PERCENT, HEATING SAID SUSPENSION TO OXIDIZE SAID STARCH AND PROVIDE A PASTE HAVING A SCOTT VISCOISITY WITHIN THE RANGE TO 40 TO 120 SECONDS PER 100 ML. ON THE BASIS OF 12 GRAMS OF SAID STARCH COOKED IN 280 ML. OF WATER FOR 15 MINUTES, NEUTRALIZING THE EXCESS CHLORINE IN SAID SUSPENSION, WASHING SAID OXIDIZED STARCH, GELATINIZING SAID OXIDIZED STARCH, RAPIDLY DRYING SAID OXIDIZED STARCH AND GRINDING SAID DRIED OXIDIZED STARCH, SAID OXIDIZED STARCH BEING DRIED IN ADMIXTURE WITH 5 TO 20 PERCENT BY WEIGHT BASED ON THE DRY WEIGHT OF THE OXIDIZED STARCH, OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF BORAX, BORIC ACID AND MIXTURES THEREOF, SAID DRIED OXIDIZED STARCH PRODUCT HAVING A CARBOXYL CONTENT OF FROM 0.025 TO 0.12 PERCENT, A FUNNEL DISPERSIBILITY IN THE RANGE OF 70 TO 1300 SECONDS PER 200 ML. OF 10 GRAMS DISPERSED IN 400 ML. OF WATER AT 80*F. AND BRABENDER HYDRATION CHARACTERISTICS IN THE RANGE OF PEAK VISCOSITY 50 TO 600 UNITS, TIME TO REACH PEAK VISOCITY 75 TO 135 SECONDS, AND A SLOPE VALUE OF 1 TO 45 UNITS WITH 25 GRAMS DISPERSED IN 450 ML. OF WATER AT 80*F.