Claims
- 1. A solid, cast detergent-bleach composition, comprising:
- (a) at least 30 wt-%, based upon the composition, alkaline hydratable chemical;
- (b) an effective amount of a hardness-sequestrant wherein the hardness-sequestrant is different than the alkaline hydratable chemical;
- (c) about 0 to 15 wt-%, based upon the composition, polyelectrolyte wherein the polyelectrolyte is different than the alkaline hydratable chemical and the hardness-sequestrant;
- (d) at least 5 wt-%, based upon the alkaline hydratable chemical, water of hydration; and
- (e) about 0.5 to 25 wt-%, based upon the composition, randomly dispersed encapsulated bleach particles, comprising:
- (i) about 20 to 90 wt-%, based upon the encapsulated bleach particles, core which comprises a source of active-halogen bleach;
- (ii) about 0 to 50 wt-%, based upon the encapsulated bleach particles, first coating which comprises a soluble inorganic coating agent; and
- (iii) about 10 to 80 wt-%, based upon the encapsulated bleach particles, second coating which comprises a synthetic detergent.
- 2. The composition of claim 1 wherein the alkaline hydratable chemical is an alkali metal hydroxide.
- 3. The composition of claim 1 wherein the hardness-sequestrant is an alkali metal polyphosphate.
- 4. The composition of claim 2 wherein the hardness-sequestrant is an alkali metal polyphosphate.
- 5. The composition of claim 2 wherein the composition comprises at least 5 wt-%, based upon the composition, water.
- 6. The composition of claim 1 wherein the core comprises a source of active-chlorine.
- 7. The composition of claim 2 wherein the core comprises a source of active-chlorine.
- 8. The composition of claim 7 wherein the core comprises dichloroisocyanurate.
- 9. The composition of claim 1 wherein the first coating comprises a detergent builder salt.
- 10. The composition of claim 9 wherein the first coating comprises an alkali metal phosphate, alkali metal sulfate or mixtures thereof.
- 11. The composition of claim 2 wherein the first coating comprises an alkali metal phosphate, alkali metal sulfate or mixtures thereof.
- 12. The composition of claim 1 wherein the second coating comprises an alkyl sulfonate or an alkali metal salt thereof.
- 13. The composition of claim 2 wherein the second coating comprises an alkyl sulfonate or an alkali metal salt thereof.
- 14. The composition of claim 12 wherein the second coating comprises an alkali metal octyl sulfonate.
- 15. The composition of claim 1 wherein the encapsulated bleach particles comprise about 35 to 60 wt-% core, about 0 to 40 wt-% first coating and about 10 to 40 wt-% second coating, based upon the encapsulated bleach particles.
- 16. A solid, cast detergent-bleach composition, comprising:
- (a) at least 30 wt-%, based upon the composition, sodium hydroxide;
- (b) about 10 to 45 wt-%, based upon the composition, alkali metal polyphosphate;
- (c) about 0 to 15 wt-%, based upon the composition, polyelectrolyte wherein the polyelectrolyte is different than (a) and (b);
- (d) at least 5 wt-%, based upon the composition, water; and
- (e) about 0.5 to 25 wt-%, based upon the composition, of about 4 to 60 U.S. mesh substantially randomly dispersed encapsulated bleach particles, comprising:
- (i) about 35 to 60 wt-%, based upon the encapsulated bleach particles, core which comprises a source of active-halogen bleach;
- (ii) about 0 to 40 wt-%, based upon the encapsulated bleach particles, first coating which comprises an alkali metal phosphate, alkali metal sulfate, or mixtures thereof; and
- (iii) about 10 to 40 wt-%, based upon the encapsulated bleach particles, second coating which comprises an alkyl sulfonate or an alkali metal salt thereof.
- 17. A process for forming a substantially uniform solid cast detergent-bleach composition, comprising the steps of:
- (a) heating about 20 to 75 wt-%, based upon the composition, of a 40 to 80 wt-% aqueous solution of an alkali metal hydroxide to about 50.degree. to 95.degree. C.;
- (b) substantially uniformly distributing into the aqueous caustic solution:
- (i) an effective amount of a wash water hardness sequestrant;
- (ii) about 0 to 15 wt-%, based upon the composition, polyelectrolyte which is different than the hardness-sequestrant;
- (iii) about 10 to 60 wt-%, based upon the composition, alkaline hydratable chemical which is different than the hardness-sequestrant and the polyelectrolyte; and
- (iv) about 0.5 to 25 wt-%, based upon the composition, encapsulated bleach particles comprising:
- (A) about 20 to 90 wt-%, based upon the encapsulated bleach particles, core which comprises a source of active-halogen bleach;
- (B) about 0 to 50 wt-%, based upon the encapsulated bleach particles, first coating which comprises a soluble inorganic coating agent; and
- (C) about 10 to 80 wt-%, based upon the encapsulated bleach particles, second coating which comprises a synthetic detergent; to form a liquid detergent-bleach composition; and
- (c) allowing the liquid detergent-bleach composition to thicken and solidify.
- 18. A process for forming a substantially uniform solid cast detergent-bleach composition, comprising the steps of:
- (a) heating about 20 to 75 wt-%, based upon the composition, of a 40 to 80 wt-% aqueous solution of an alkali metal hydroxide to about 50.degree. to 95.degree. C.;
- (b) substantially uniformly distributing into the aqueous solution:
- (i) an effective amount of a wash water hardness sequestrant;
- (ii) about 0-15 wt-%, based upon the composition, polyelectrolyte which is different than the hardness-sequestrant; and
- (iii) about 10 to 60 wt-%, based upon the composition, alkaline hydratable chemical which is different than the hardness-sequestrant and the polyelectrolyte; to form a liquid detergent composition;
- (c) blending without substantial agitation about 0.5 to 25 wt-%, based upon the composition, encapsulated bleach particles and the liquid detergent composition, the encapsulated bleach particles comprising:
- (i) about 20 to 90 wt-%, based upon the encapsulated bleach particles, core which comprises a source of active halogen bleach;
- (ii) about 0 to 50 wt-%, based upon the encapsulated bleach particles, first coating which comprises a soluble inorganic coating agent; and
- (iii) about 10 to 80 wt-%, based upon the encapsulated bleach particles, second coating which comprises a synthetic detergent;
- to form a liquid detergent-bleach composition; and
- (d) allowing the liquid detergent-bleach composition to thicken and solidify.
- 19. The process of claim 17 wherein the hardness sequestrant is an alkali metal polyphosphate.
- 20. The process of claim 18 wherein the hardness sequestrant is sodium tripolyphosphate.
- 21. The process of claim 17 wherein the polyelectrolyte is a polyacrylate.
- 22. The process of claim 17 wherein the alkaline hyratable chemical is anhydrous sodium hydroxide, an alkali metal condensed phosphate, or a combination of sodium hydroxide and an alkali metal condensed phosphate.
- 23. The process of claim 18 wherein the alkaline hydratable chemical is a combination of anhydrous sodium hydroxide and anhydrous sodium tripolyphosphate.
- 24. The process of claim 17 wherein the core comprises a source of active-chlorine.
- 25. The process of claim 18 wherein the core comprises dichloroisocyanurate.
- 26. The process of claim 17 wherein the first coating comprises a detergent builder salt.
- 27. The process of claim 26 wherein the first coating comprises an alkali metal phosphate, alkali metal sulfate or mixtures thereof.
- 28. The process of claim 18 wherein the first coating comprises an alkali metal phosphate, alkali metal sulfate or mixtures thereof.
- 29. The process of claim 17 wherein the second coating comprises an alkyl sulfonate or an alkali metal salt thereof.
- 30. The composition of claim 18 wherein the second coating comprises an alkyl sulfonate or an alkali metal salt thereof.
- 31. The process of claim 29 wherein the second coating comprises an alkali metal octyl sulfonate.
- 32. The process of claim 17 wherein the encapsulated bleach particles comprise about 35 to 60 wt-% core, about 0 to 40 wt-% first coating, and about 10 to 40 wt-% second coating, based upon the encapsulated bleach particles.
- 33. A process for forming a substantially uniform solid cast detergent-bleach composition, comprising the steps of:
- (a) heating about 35 to 75 wt-%, based upon the composition, of a 40 to 80 wt-% sodium hydroxide aqueous solution, to about 50.degree. to 95.degree. C.
- (b) substantially uniformally distributing in the aqueous solution;
- (i) an effective amount of sodium tripolyphosphate as a wash water hardness sequestrant;
- (ii) about 0 to 15 wt-%, based upon the composition, polyacrylate;
- (iii) about 25 to 60 wt-%, based upon the composition, alkaline hydratable chemical selected from the group consisting of anhydrous sodium hydroxide, anhydrous alkali metal polyphosphate and mixtures thereof;
- to form a liquid detergent composition;
- (c) blending with the liquid detergent composition, without substantial agitation, about 3 to 12 wt-%, based upon the composition, encapsulated bleach particles, comprising:
- (i) about 35 to 60 wt-%, based upon the encapsulated bleach particles, core which comprises dichloroisocyanurate;
- (ii) about 0 to 40 wt-%, based upon the encapsulated bleach particles, first coating selected from the group consisting of alkali metal phosphates, alkali metal sulfates and mixtures thereof; and
- (iii) about 10 to 40 wt-%, based upon the encapsulated bleach particles, second coating comprising an alkyl sulfonate or an alkali metal salt thereof;
- to form a liquid detergent composition; and
- (d) rapidly cooling the liquid detergent-bleach composition by contacting the composition with water in order to thicken and solidify the composition.
Parent Case Info
This application is a continuation-in-part of Application Ser. No. 728,748, filed Apr. 30, 1985.
US Referenced Citations (16)
Continuation in Parts (1)
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728748 |
Apr 1985 |
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