US3887480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detergent compositions and methods of making and using them
Assignee: Ecolab Inc
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Filing: 1974-06-24
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Granted: 1975-06-03
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Expires: 1994-06-24
Abstract
Abstract Water soluble polymers are prepared by the process of reacting a first monomer selected from the group consisting of maleic acid, maleic anhydride and alkali metal salts of maleic acid with at least one other copolymerizable monomer in water in the presence of 18 - 40 parts by weight of persulfate catalyst per 100 parts by weight of monomer. The catalyst is preferably potassium persulfate. The resulting polymers are useful ingredients in detergent compositions, especially those used for machine dishwashing.
Inventors
- 👤 Larry M Rue
- 👤 Richard E Freis
- 👤 Oliver A Ossanna
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:53
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/37; C11D3/3746; C11D3/3757; C11D3/3761
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
83 words
A DISHWASHING DETERGENT OR LAUNDRY DETERGENT COMPOSITION COMPRISING DETERGENT INGREDIENTS AND, IN COMBINATION THEREWITH, THE FOLLOWING WATER CONDITIONING AGENT FOR SAID DETERGENT COMPOSITION: A POLYMER CONSISTING ESSENTIALLY OF: (A) 35-70 MOLE % MALEIC MONOMER; (B) 20-45 MOLE % VINYL ACETATE, AND (C) 2-40 MOLE % ACRYLIC ACID, METHACRYLIC ACID, OR AN ALKALI METAL SALT THEREOF; SAID POLYMER HAVING A NUMBER AVERAGE MOLECULAR WEIGHT OF AT LEAST 500 AND BEING SOLUBLE IN WATER AT LEAST TO THE EXTENT OF 30% BY WEIGHT AT 25*C.
Claim 2
Dependent Claim
83 words
A DISHWASHING DETERGENT OR LAUNDRY DETERGENT COMPOSITION COMPRISING DETERGENT INGREDIENTS AND, IN COMBINATION THEREWITH, THE FOLLOWING WATER CONDITIONING AGENT FOR SAID DETERGENT COMPOSITION: A POLYMER CONSISTING ESSENTIALLY OF: (A) 35-70 MOLE % MALEIC MONOMER; (B) 20-45 MOLE % VINYL ACETATE, AND (C) 2-40 MOLE % ACRYLIC ACID, METHACRYLIC ACID, OR AN ALKALI METAL SALT THEREOF; SAID POLYMER HAVING A NUMBER AVERAGE MOLECULAR WEIGHT OF AT LEAST 500 AND BEING SOLUBLE IN WATER AT LEAST TO THE EXTENT OF 30% BY WEIGHT AT 25*C.
Claim 3
Dependent Claim
89 words
A dishwashing detergent or laundry detergent composition comprising detergent ingredients and, in combination therewith, the following water conditioning agent for said detergent composition: a polymer consisting essentially of: (a) 35 - 70 mole % maleic monomer; (b) 20 - 45 mole % vinyl acetate; and (c) 2 - 40 mole % acrylic acid, methacrylic acid, or an alkali metal salt thereof; said polymer having a number average molecular weight of at least 500 and being soluble in water at least to the extent of 30% by weight at 25*C.
Claim 4
Dependent Claim
89 words
A dishwashing detergent or laundry detergent composition comprising detergent ingredients and, in combination therewith, the following water conditioning agent for said detergent composition: a polymer consisting essentially of: (a) 35 - 70 mole % maleic monomer; (b) 20 - 45 mole % vinyl acetate; and (c) 2 - 40 mole % acrylic acid, methacrylic acid, or an alkali metal salt thereof; said polymer having a number average molecular weight of at least 500 and being soluble in water at least to the extent of 30% by weight at 25*C.
Claim 5
Dependent Claim
15 words
A detergent composition according to claim 1 wherein said detergent ingredients include an alkaline silicate.
Claim 6
Dependent Claim
27 words
A detergent composition according to claim 2 wherein said composition, at 1 weight % concentration in water at 25*C., has a pH ranging from 7 to 13.
Claim 7
Dependent Claim
30 words
A detergent composition according to claim 1 wherein said maleic monomer is selected from the group consisting of maleic acid, maleic anhydride, and the alkali metal salts of maleic acid.
Claim 8
Dependent Claim
65 words
A detergent composition according to claim 1 wherein said polymer is made by copolymerizing the combination of monomers comprising (a) said maleic monomer, (b) said vinyl acetate, and (c) said acrylic acid, methacrylic acid, or alkali metal salt thereof, in water in the presence of at least 17 parts by weight of a persulfate catalyst per 100 parts by weight of said combination of monomers.
Claim 9
Dependent Claim
51 words
In a method of washing articles with a detergent composition containing an alkaline slilcate and having a pH, at 1 weight % concentration in water at 25*C., of 7 to 13, the improvement which comprises the step of: conditioning the water with a water-conditioning amount of said polymer of claim 1.
Claim 10
Dependent Claim
16 words
A method according to claim 6 wherein the waterconditioning amount is at least about 100 ppm.
Claim 11
Dependent Claim
16 words
The method according to claim 7 wherein said method is carried out in a machine dishwasher.
Claim 12
Independent Claim
126 words
A method for making a dishwasher or laundry detergent comprising the steps of: a. providing a polyelectrolyte water conditioning agent by copolymerizing the combination of monomers comprising (1) a maleic monomer selected from the group consisting of maleic acid, maleic anhydride, and the alkali metal salts of maleic acid, and (2) at least one other copolymerizable monomer selected from the group consisting of vinyl acetate, acrylic acid, methacrylic acid, and an alkali metal salt of acrylic or methacrylic acid; said polymerization being carried out in water in the presence of at least 17 parts by weight of a persulfate catalyst per 100 parts by weight of said combination of monomers; b. combining the resulting polyelectrolyte water conditioning agent with a detergent composition containing an alkaline silicate.
Claim 13
Independent Claim
126 words
A method for making a dishwasher or laundry detergent comprising the steps of: a. providing a polyelectrolyte water conditioning agent by copolymerizing the combination of monomers comprising (1) a maleic monomer selected from the group consisting of maleic acid, maleic anhydride, and the alkali metal salts of maleic acid, and (2) at least one other copolymerizable monomer selected from the group consisting of vinyl acetate, acrylic acid, methacrylic acid, and an alkali metal salt of acrylic or methacrylic acid; said polymerization being carried out in water in the presence of at least 17 parts by weight of a persulfate catalyst per 100 parts by weight of said combination of monomers; b. combining the resulting polyelectrolyte water conditioning agent with a detergent composition containing an alkaline silicate.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |