Patent US4698174A successfully refreshed from Google Patents.
US4698174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Additives for detergents and cleaning agents
Assignee: BASF SE
•
Filing: 1986-01-27
•
Granted: 1987-10-06
•
Expires: 2006-01-27
Abstract
Abstract Pulverulent and/or granular additives for pulverulent detergents and cleaning agents, consisting of (a) from 80 to 20% by weight of one or more copolymers comprising from 40 to 90% by weight of (meth)acrylic acid and from 60 to 10% by weight of maleic acid and/or one or more copolymers comprising from 10 to 45% by weight of (meth)acrylic acid, from 10 to 45% by weight of maleic acid and from 10 to 60% by weight of one or more hydroxyalkyl (meth)acrylates where hydroxyalkyl is of 2 to 6 carbon atoms, if appropriate in the form of a partially or completely neutralized water-soluble salt, (b) from 20 to 80% by weight of nitrilotriacetic acid or its mono-, di- or trisodium or mono-, di- or tripotassium salt and (c) from 0 to 20% by weight of one or more additives conventionally used for detergent and cleaning agent formulations, the use of these pulverulent and/or granular mixtures as additives for pulverulent and/or granular detergents and cleaning agents, and processes for the preparation of the said additives.
Inventors
- 👤 Walter Denzinger
- 👤 Heinrich Hartmann
- 👤 Wolfgang Trieselt
- 👤 Albert Hettche
- 👤 Rolf Schneider
- 👤 Hans-Juergen Raubenheimer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:24
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/26; C11D3/33; C11D3/37; C11D3/3746; C11D3/3757; C11D3/3761
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
152 words
A pulverulent and/or granular additive for pulverulent detergents and cleaning agents, which consists of: (A) from 80 to 20% by weight of (i) at least one copolymer consisting of from 40 to 90% by weight of (meth)acrylic acid and from 60 to 10% by weight of maleic acid, (ii) at least one copolymer consisting of from 10 to 45% by weight of (meth)acrylic acid, from 10 to 45% by weight of maleic acid and from 10 to 60% by weight of at least one hydroxy(C 2-6 )alkyl (meth)acrylate, or (iii) mixtures of copolymers (i) and (ii), said copolymers (i) and (ii) optionally being in the form of water-soluble salts; (B) from 20 to 80% by weight of nitrilotriacetic acid or its mono-, di- or trisodium or mono-, di- or tripotassium salt; and (C) from 0 to 20% by weight of at least one additive conventionally used for detergent and cleaning agent formulations.
Claim 2
Dependent Claim
152 words
A pulverulent and/or granular additive for pulverulent detergents and cleaning agents, which consists of: (A) from 80 to 20% by weight of (i) at least one copolymer consisting of from 40 to 90% by weight of (meth)acrylic acid and from 60 to 10% by weight of maleic acid, (ii) at least one copolymer consisting of from 10 to 45% by weight of (meth)acrylic acid, from 10 to 45% by weight of maleic acid and from 10 to 60% by weight of at least one hydroxy(C 2-6 )alkyl (meth)acrylate, or (iii) mixtures of copolymers (i) and (ii), said copolymers (i) and (ii) optionally being in the form of water-soluble salts; (B) from 20 to 80% by weight of nitrilotriacetic acid or its mono-, di- or trisodium or mono-, di- or tripotassium salt; and (C) from 0 to 20% by weight of at least one additive conventionally used for detergent and cleaning agent formulations.
Claim 3
Dependent Claim
19 words
The additive of claim 1, wherein the mean particle diameter of said additive ranges from 10 to 500 μm.
Claim 4
Dependent Claim
19 words
The additive of claim 2, wherein the mean particle diameter of said additive ranges from 50 to 300 μm.
Claim 5
Dependent Claim
24 words
The additive of claim 1, wherein said copolymer (i) consists of from 45 to 85% (meth)acrylic acid and from 55 to 15% maleic acid.
Claim 6
Dependent Claim
43 words
The additive of claim 1, wherein said copolymer (ii) consists of from 10 to 40% by weight of (meth)acrylic acid, from 10 to 40% by weight maleic acid and from 20 to 50% by weight of at least one hydroxy(C 2-6 )alkyl (meth)acrylate.
Claim 7
Dependent Claim
25 words
The additive of claim 1, wherein said hydroxy(C 2-6 )alkyl (meth)acrylate is hydroxyethyl methacrylate, hydroxypropyl methacrylate, butanediol monomethacrylate, neopentylglycol methacrylate, pentane-1,5-diol monoacrylate or hexane-1,6-diol monoacrylate.
Claim 8
Dependent Claim
22 words
The additive of claim 1, wherein said copolymers (i) and (ii) have from 50 to 100% of the carboxyl groups therein neutralized.
Claim 9
Dependent Claim
37 words
The additive of claim 1, wherein said copolymers (i) and (ii) have K values ranging from 8 to 150 as measured at 25° C. in a 1% strength by weight aqueous solution at a pH of 7.
Claim 10
Dependent Claim
14 words
The additive of claim 8, wherein said K value ranges from 10 to 100.
Claim 11
Dependent Claim
58 words
A process for the preparation of a pulverulent and/or granular additive as claimed in claim 1 for pulverulent detergents and cleaning agents, which comprising: preparing an aqueous solution or suspension containing from 20 to 70% by weight of the mixture claimed in claim 3; and drying said aqueous mixture at a temperature ranging from 70° to 200° C.
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) | 1990-10-05 | 1991-04-06 | 1991-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-10-05 | 1995-04-06 | 1995-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-10-05 | 1999-04-06 | 1999-10-06 | $7700.00 | Window Closed / Lapsed |