Claims
- 1. A detergency builder/cobuilder preformulation, comprising an intimate structured admixture of at least one polyimide polymer and at least one alkali metal silicate, wherein the polyimide/silicate ratio by weight ranges from about 40/60 to 55/45, said preformulation obtained by forming a mixture by mixing the polyimide polymer with a concentrated aqueous solution of the silicate containing 30-60% by weight of solids of an alkali metal silicate with a SiO.sub.2 /M.sub.2 O ratio of about 1.6 to 3.5 wherein M is an alkali metal and drying the mixture at a temperature of about 40.degree.-100.degree. C., said at least one polyimide polymer generating at least one biodegradable water-soluble polypeptide species when contacted with an aqueous medium having a non-alkaline pH.
- 2. The detergency preformulation as defined by claim 1, the amount of silicate therein being such as to effect complete hydrolysis of said polyimide polymer into its water-soluble salt(s) or corresponding poly(amino acid)(s) when contacted with said aqueous medium having a non-alkaline pH.
- 3. The detergency preformulation as defined by claim 1, said at least one polyimide polymer comprising a biopolymeric polycondensate of an amino diacid or precursor thereof.
- 4. The detergency preformulation as defined by claim 3, wherein said at least one polyimide polymer comprises a biopolymeric polycondensate of aspartic acid, glutamic acid, mixtures thereof, or precursors thereof.
- 5. The detergency preformulation as defined by claim 1, said at least one polyimide polymer having a weight-average molecular weight ranging from about 2,000 to 10.sup.7.
- 6. The detergency preformulation as defined by claim 5, said at least one polyimide polymer having a weight-average molecular weight ranging from about 3,500 to 60,000.
- 7. The detergency preformulation as defined by claim 1, said molar ratio ranging from 1.8 to 2.6.
- 8. The detergency preformulation as defined by claim 1, further comprising a moisture-stabilizing amount of at least one carbonate.
- 9. The detergency preformulation as defined by claim 8, wherein said at least one carbonate comprises from 20% to 75% by weight with respect to the total weight of silicates and carbonates.
- 10. The detergency preformulation as defined by claim 1, further comprising up to 30% by weight of water.
- 11. The detergency preformulation as defined by claim 1, comprising cogranulates thereof.
- 12. The detergency preformulation as defined by claim 11, said cogranulates having a mean particle diameter ranging from 200 to 800 micrometers.
- 13. The detergency preformulation as defined by claim 10, comprising from about 5% to 35% by weight of said at least one polyimide polymer, from about 40% to 60% by weight of said at least one silicate, from about 10% to 30% by weight of water, and, optionally a moisture-stabilizing amount of at least one carbonate.
- 14. The detergency preformulation as defined by claim 13, comprising about 35% by weight of said at least one polyimide polymer, about 45% by weight of said at least one silicate, and about 20% by weight of water.
- 15. A detergent composition comprising at least one surfactant and the detergency preformulation as defined by claim 1.
- 16. The detergent composition as defined by claim 15, comprising from about 8% to 20% by weight of said at least one surfactant and about 1% to 60% by weight of said detergency preformulation.
- 17. The detergent composition as defined by claim 15, further comprising at least one builder other than said detergency preformulation, at least one bleaching agent, at least one anti-redeposition agent, at least one anti-encrustation agent, at least one filler material, or combinations thereof.
- 18. The detergency preformulation as defined by claim 6, said at least one polyimide polymer having a weight-average molecular weight greater than 30,000.
Priority Claims (1)
Number |
Date |
Country |
Kind |
93 08385 |
Jul 1993 |
FRX |
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Parent Case Info
This application is a continuation of application Ser. No. 08/271,957, filed Jul. 8, 1994, now abandoned.
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Continuations (1)
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Number |
Date |
Country |
Parent |
271957 |
Jul 1994 |
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