Claims
- 1. A nonionic powdery detergent composition having a bulk density of 0.6 to 1.2 g/cm.sup.3 and having an average particle diameter of 200 to 1000 um comprising 12 to 50% by weight, based on the total weight of the composition, of (a) a nonionic surfactant having a melting point of 40.degree. C. or below, 3 to 60% by weight, based on the total weight of the composition, of (b) a crystalline layer silicate represented by the formula (I) and 5 to 30% by weight, based on the total weight of the composition, of (c) a porous oil-absorbent carrier having an oil absorbability of 80 ml/100 g or more and wherein said carrier is an amorphous silica:
- M.sub.2 Si.sub.x O.sub.(2x+1) .multidot.y(H.sub.2 O) (I)
- wherein M represents an alkali metal atom and x and y are respectively 1.5.ltoreq.x.ltoreq.4 and y.ltoreq.25.
- 2. The nonionic powdery detergent composition according to claim 1, wherein the porous oil-absorbent carrier (c) is one containing silicon in an amount of 30% by weight or more of SiO.sub.2 based on the entire porous oil-absorbent carrier, as determined with no hydrate present.
- 3. The nonionic powdery detergent composition according to claim 1, wherein the porous oil-absorbent carrier (c) is one which satisfies the requirement that a 5% dispersion of the porous oil-absorbent carrier in water has a pH value of 9 or greater or the requirement that the amount of dissolution of the porous oil-absorbent carrier in 100 ml of a 2% aqueous NaOH solution is 0.5 g or less.
- 4. The nonionic powdery detergent composition according to claim 1, wherein the nonionic surfactant (a) is a polyoxyethylene alkyl ether wherein the alkyl group has 10 to 20 carbon atoms and the average number of moles of addition of ethylene oxide is 5 to 15.
- 5. A process for producing a nonionic powdery detergent composition having a bulk density of 0.6 to 1.2 g/cm.sup.3 and having an average particle diameter of 200 to 1000 um which comprises gradually adding or spraying under stirring 12 to 50% by weight based on the total weight of the composition of (a) a nonionic surfactant having a melting point of 40.degree. C. or below onto a mixture of powdery components comprising 10 to 60% by weight based on the total weight of the composition of (b) a crystalline layer silicate represented by the following formula (I) and 5 to 30% by weight based on the total weight of the composition of (c) a porous oil-absorbent carrier having an oil absorbability of 80 ml/100 g or more, and containing silicon, calculated as SiO.sub.2, in an amount of 30% by weight or more based on the entire porous oil-absorbent carrier, as determined with no hydrate present, and satisfying the requirement that a 5% dispersion of the porous oil-absorbent carrier in water has a pH value of 9 or greater, or the requirement that the amount of dissolution of the porous oil-absorbent carrier in 100 ml of a 2% aqueous NaOH solution is 0.5 g or less and wherein said porous oil-absorbing carrier is an amorphous silica to produce a homogeneous mixture:
- M.sub.2 Si.sub.x O.sub.(2x+1) .multidot.Y(H.sub.2 O) (I)
- wherein M represents an alkali metal atom and x and y are respectively 1.5.ltoreq.x.ltoreq.4 and y.ltoreq.25.
- 6. The process for producing a nonionic powdery detergent composition according to claim 5, wherein the nonionic powdery detergent composition further contains a carbonate and the mixture of powdery components comprises the crystalline layer silicate (b), the porous oil-absorbent carrier (c) and the carbonate.
- 7. The process for producing a nonionic powdery detergent composition according to claim 5, which further comprises mixing the homogeneous mixture with a detergent assistant or an additive selected from the group consisting of inorganic electrolytes, inorganic chelating agents, organic chelating agents, antiredeposition agents, fluorescent dyes and blueing agents.
- 8. The process for producing a nonionic powdery detergent composition according to claim 5, which further comprises at least one member selected from the group consisting of a surface modifier, a perfume and an enzyme.
- 9. A process for producing a nonionic powdery detergent composition having a bulk density of 0.6 to 1.2 g/cm.sup.3 and having an average particle diameter of 200 to 1000 um which comprises gradually adding or spraying under stirring 12 to 50% by weight based on the total weight of the composition of (a) a nonionic surfactant having a melting point of 40.degree. C. or below onto a mixture of powdery components comprising 10 to 60% by weight based on the total weight of the composition of (b) a crystalline layer silicate represented by the formula (I) and 5 to 30% by weight based on the total weight of the composition of (c) a porous oil-absorbent carrier having an oil absorbability of 80 ml/100 g or more to produce a homogeneous mixture and wherein the porous oil absorbent carrier is an amorphous silica, and then adding 0 to 5% by weight based on the total weight of the composition of (d) a polyethylene glycol having a weight average molecular weight of 4000 to 20000 in a molten state to the homogeneous mixture to produce a base for the nonionic powdery detergent composition:
- M.sub.2 Si.sub.x O.sub.(2x+1) .multidot.Y(H.sub.2 O) (I)
- wherein M represents an alkali metal atom and x and y are respectively 1.5.ltoreq.x.ltoreq.4 and y.ltoreq.25.
- 10. The process for producing a nonionic powdery detergent composition according to claim 9, wherein the nonionic surfactant (a) is a polyoxyethylene alkyl ether wherein the alkyl group has 10 to 20 carbon atoms and the average number of moles of addition of ethylene oxide is 5 to 15.
- 11. The process for producing a nonionic powdery detergent composition according to claim 9, wherein the nonionic powdery detergent composition further contains a carbonate and the mixture of powdery components comprises the crystalline layer silicate (b), the porous oil-absorbent carrier (c) and the carbonate.
- 12. The process for producing a nonionic powdery detergent composition according to claim 9, which further comprises mixing the homogenous mixture with a detergent assistant or an additive selected from the group consisting of inorganic electrolytes, inorganic chelating agents, organic chelating agents, antideposition agents, fluorescent dyes and blueing agents.
- 13. The process for producing a nonionic powdery detergent composition according to claim 9, which further comprises at least one member selected from the group consisting of a surface modifier, a perfume and an enzyme.
- 14. A nonionic powdery detergent composition having a bulk density of 0.6 to 1.2 g/cm.sup.3 and having an average particle size of 200 to 1000 um consisting essentially of components (a) to (d):
- (a) a nonionic surfactant having a melting point of 40.degree. C. or below in an amount of 12 to 50% by weight based on the total weight of the composition;
- (b) a crystalline layer silicate represented by the formula (I) in an amount of 10 to 60% by weight based on the total weight of the composition:
- M.sub.2 Si.sub.x O.sub.(2x+1) .multidot.Y(H.sub.2 O) (I)
- wherein M represents an alkali metal atom and x and y are respectively 1.5.ltoreq.x.ltoreq.4 and y.ltoreq.25;
- (c) a porous oil-absorbent carrier in an amount of 5 to 30% by weight based on the total weight of the composition, having an oil absorbability of 80 ml/100 g or more, and containing silicon, calculated as SiO.sub.2, in an amount of 30% by weight or more based on the entire porous oil-absorbent carrier, as determined with no hydrate present, and satisfying the requirement that a 5% dispersion of the porous oil-absorbent carrier in water has a pH value of 9 or greater, or the requirement that the amount of dissolution of the porous oil-absorbent carrier in 100 ml of a 2% aqueous NaOH solution is 0.5 g or less and wherein said porous oil-absorbing carrier is an amorphous silica; and
- (d) a polyethylene glycol in an amount of 0 to 5% by weight based on the total weight of the composition.
- 15. The nonionic powdery detergent composition of claim 14, further comprising a soap.
- 16. The nonionic powdery detergent composition according to claim 14, wherein the nonionic surfactant (a) is a polyoxyethylene alkyl ether wherein the alkyl group has 10 to 20 carbon atoms and the average number of moles of addition of ethylene oxide is 5 to 15.
- 17. The powdery detergent composition according to claim 14, wherein the composition essentially consists of (a), (b) and (c).
- 18. The nonionic powdery detergent composition according to claim 14, wherein the amount of the polyethylene glycol (d) is 1 to 5% by weight based on the total weight of the composition.
Priority Claims (1)
Number |
Date |
Country |
Kind |
4-053168 |
Mar 1992 |
JPX |
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Parent Case Info
This application is a continuation of application Ser. No. 08/028,215 filed on Mar. 9, 1993, now abandoned.
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Continuations (1)
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Number |
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Parent |
28215 |
Mar 1993 |
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