Patent US3870648A successfully refreshed from Google Patents.
US3870648A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyelectrolytes as detergent builders
Assignee: ISP Investments LLC
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Filing: 1971-01-14
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Granted: 1975-03-11
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Expires: 1991-01-14
Abstract
Abstract A non-polluting builder composition for cleansing purposes is described consisting of composite of a polyelectrolyte and the alkali metal salt of a weak acid. Such builder compositions can replace the phosphorous and nitrogen-containing builders previously used in cleansing and laundry detergents with regard to effectiveness in hard water at one-tenth and one-fifth the concentrations of such previously used builders. In hard water, such composite builders prevent the precipitation of insoluble calcium soaps which occurs in household and laundry detergent compositions utilizing either component alone as a builder. The previously noted stabilizing effects of the polyelectrolyte with regard to enzymes and bleaches is not decreased by the added components of these composite builders.
Inventors
- 👤 Richard Anthony Grifo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:02
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/37; C11D3/3746; C11D3/3757; C11D3/3761; C11D3/02; C11D3/04; C11D3/046; C11D3/08; C11D3/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
151 words
A process for producing an ecologically desirable detergent composition suitable for washing textiles, comprising admixing, as essential ingredients, a detergent selected from the group consisting of nonionic, anionic, cationic and amphoteric detergents, together with a composite builder, as sole builder, consisting of a member selected from the group consisting of polyvinyl methyl ether/maleic anhydride, salts and hydrolysis products thereof having a K value of from 10 to about 200 and at least one alkali metal salt selected from the group consisting of alkali metal carbonates, alkali metal silicates, and alkali metal borates wherein the ratio of polyvinyl methyl ether/maleic anhydride group member to alkali metal salt group member is, in parts by weight, from 1:100 to 1:2, the ratio of the detergent to the composite builder being, in parts by weight, 8:1 to 1:100, whereby to produce an ecologically desirable detergent composition at least substantially devoid of non-polluting nitrogen and phosphorus.
Claim 2
Dependent Claim
151 words
A process for producing an ecologically desirable detergent composition suitable for washing textiles, comprising admixing, as essential ingredients, a detergent selected from the group consisting of nonionic, anionic, cationic and amphoteric detergents, together with a composite builder, as sole builder, consisting of a member selected from the group consisting of polyvinyl methyl ether/maleic anhydride, salts and hydrolysis products thereof having a K value of from 10 to about 200 and at least one alkali metal salt selected from the group consisting of alkali metal carbonates, alkali metal silicates, and alkali metal borates wherein the ratio of polyvinyl methyl ether/maleic anhydride group member to alkali metal salt group member is, in parts by weight, from 1:100 to 1:2, the ratio of the detergent to the composite builder being, in parts by weight, 8:1 to 1:100, whereby to produce an ecologically desirable detergent composition at least substantially devoid of non-polluting nitrogen and phosphorus.
Claim 3
Dependent Claim
151 words
A PROCESS FOR PRODUCING AN ECOLOGICALLY DESIRABLE DETERGENT COMPOSITION SUITABLE FOR WASHING TEXTILES, COMPRISING ADMIXING, AS ESSENTIAL INGREDIENTS, A DETERGENT SELECTED FROM THE GROUP CONSISTING OF NONIONIC, ANIONIC, CATIONIC AND AMPHOTERIC DETERGENTS, TOGETHER WITH A COMPOSITE BUILDER, AS SOLE BUILDER, CONSISTING OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF POLYVINYL METHYL ETHER/MALEIC ANHYDRIDE, SALTS AND HYDROLYSIS PRODUCTS THEREOF HAVING A K VALUE OF FROM 10 TO ABOUT 200 AND AT LEAST ONE ALKALI METAL SALT SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL CARBONATES, ALKALI METAL SILICATES, AND ALKALI METAL BORATES WHEREIN THE RATIO OF POLYVINYL METHYL ETHER/MALEIC ANHYDRIDE GROUP MEMBER TO ALKALI METAL SALT GROUP MEMBER IS, IN PARTS BY WEIGHT, FROM 1:100 TO 1:2, THE RATIO OF THE DETERGENT TO THE COMPOSITE BUILDER BEING, IN PARTS BY WEIGHT, 8:1 TO 1:100. WHEREBY TO PRODUCE AN ECOLOGICALLY DESIRABLE DETERGENT COMPOSITION AT LEAST SUBSTANTIALLY DEVOID OF NON-POLLUTING NITROGEN AND PHOSPHORUS.
Claim 4
Dependent Claim
151 words
A PROCESS FOR PRODUCING AN ECOLOGICALLY DESIRABLE DETERGENT COMPOSITION SUITABLE FOR WASHING TEXTILES, COMPRISING ADMIXING, AS ESSENTIAL INGREDIENTS, A DETERGENT SELECTED FROM THE GROUP CONSISTING OF NONIONIC, ANIONIC, CATIONIC AND AMPHOTERIC DETERGENTS, TOGETHER WITH A COMPOSITE BUILDER, AS SOLE BUILDER, CONSISTING OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF POLYVINYL METHYL ETHER/MALEIC ANHYDRIDE, SALTS AND HYDROLYSIS PRODUCTS THEREOF HAVING A K VALUE OF FROM 10 TO ABOUT 200 AND AT LEAST ONE ALKALI METAL SALT SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL CARBONATES, ALKALI METAL SILICATES, AND ALKALI METAL BORATES WHEREIN THE RATIO OF POLYVINYL METHYL ETHER/MALEIC ANHYDRIDE GROUP MEMBER TO ALKALI METAL SALT GROUP MEMBER IS, IN PARTS BY WEIGHT, FROM 1:100 TO 1:2, THE RATIO OF THE DETERGENT TO THE COMPOSITE BUILDER BEING, IN PARTS BY WEIGHT, 8:1 TO 1:100. WHEREBY TO PRODUCE AN ECOLOGICALLY DESIRABLE DETERGENT COMPOSITION AT LEAST SUBSTANTIALLY DEVOID OF NON-POLLUTING NITROGEN AND PHOSPHORUS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-10 | 1978-09-09 | 1979-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-10 | 1982-09-09 | 1983-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-10 | 1986-09-09 | 1987-03-11 | $7700.00 | Window Closed / Lapsed |