EP0301883A1
Expired / Lapsed
EP
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Liquid detergent compositions
Assignee: Unilever PLC
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Filing: 1988-07-29
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Granted: —
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Expires: 2008-07-29
Abstract
Abstract The viscosity of concentrated liquid detergents with high concentrations of surfactant and no more than 5% by weight of swelling clay, may be reduced if the concentrate comprises less than 15% by volume of suspended solid material and is formulated thus:- (a) at least 15% by weight of detergent active material; (b) from 1 to 300/0 by weight of a salting-out electrolyte: (c) from 0.1 to 20% by weight of a viscosity reducing water soluble polymer in an amount sufficent to reduce the. viscosity by more than 50/0 when measured at a shear rate of 21 S- 1 and in comparison with a composition indentical except that all such polymer is omitted, said polymer having an electrolyte resistance of more than 5 grams sodium nitrilotriacetate in 100ml of a 5% by weight aqueous solution thereof, with the system adjusted to neutral pH, and said polymer having a vapour pressure in 20% aqueous solution equal to or less than the vapour pressure of a reference 2% by weight or greater aqueous solution of polyethylene glycol having an average molecular weight of 6000; said viscosity reducing polymer having molecular weight of at least 1000.
Inventors
- 👤 David Machin
- 👤 Johannes Cornelis Van De Pas
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 18:02
CPC Classifications
C; C11; C11D; C11D1/00; C11D1/66; C11D17/00; C11D17/0008; C11D17/0026; C11D17/0013; C11D3/00; C11D3/39
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
221 words
An aqueous surfactant-structured liquid detergent concentrate comprising less than 15% by volume suspended solid material and further comprising: (a) at least 15% by weight of detergent active material; (b) from 1 to 300/o by weight of a salting-out electrolyte; (c) from 0.1 to 20% by weight of a viscosity reducing water soluble polymer in an amount sufficient to reduce the viscosity by more than 5% when measured at a shear rate of 21 S- 1 and in comparison with a composition indentical except that all such polymer is omitted, said polymer having an electrolyte resistance (as hereinbefore defined) of more than 5 grams sodium nitrilotriacetate in 100ml of a 5% by weight aqueous solution thereof, with the system adjusted to neutral pH, and said polymer having a vapour pressure in 20% aqueous solution equal to or less than the vapour pressure of a reference 2% by weight or greater aqueous solution of polyethylene glycol having an average molecular weight of 6000; said viscosity reducing polymer having molecular weight of at least 1000; and the composition comprising no, or less than 50% by weight of a swelling clay and yielding no more than 20/ 0 phase separation upon storage at 25°C for 21 days and having a viscosity of no greater than 1000 mPaS at a shear rate of 21S- 1 .
Claim 2
Dependent Claim
221 words
An aqueous surfactant-structured liquid detergent concentrate comprising less than 15% by volume suspended solid material and further comprising: (a) at least 15% by weight of detergent active material; (b) from 1 to 300/o by weight of a salting-out electrolyte; (c) from 0.1 to 20% by weight of a viscosity reducing water soluble polymer in an amount sufficient to reduce the viscosity by more than 5% when measured at a shear rate of 21 S- 1 and in comparison with a composition indentical except that all such polymer is omitted, said polymer having an electrolyte resistance (as hereinbefore defined) of more than 5 grams sodium nitrilotriacetate in 100ml of a 5% by weight aqueous solution thereof, with the system adjusted to neutral pH, and said polymer having a vapour pressure in 20% aqueous solution equal to or less than the vapour pressure of a reference 2% by weight or greater aqueous solution of polyethylene glycol having an average molecular weight of 6000; said viscosity reducing polymer having molecular weight of at least 1000; and the composition comprising no, or less than 50% by weight of a swelling clay and yielding no more than 20/ 0 phase separation upon storage at 25°C for 21 days and having a viscosity of no greater than 1000 mPaS at a shear rate of 21S- 1 .
Claim 3
Dependent Claim
20 words
A composition according to claim 1, wherein the electrolyte resistance of the polymer is more than 10 grams sodium nitrilotriacetate.
Claim 4
Dependent Claim
20 words
A composition according to claim 2, wherein said electrolyte resistance of the polymer is more than 15 grams sodium nitrilotriacetate.
Claim 5
Dependent Claim
18 words
A composition according to any preceding claim, wherein the concentration of the reference solution is 10% by weight.
Claim 6
Dependent Claim
18 words
A composition according to any preceding claim, wherein the concentration of the reference solution is 18% by weight.
Claim 7
Dependent Claim
20 words
A concentrate according to any preceding claim, wherein the amount of the polymer is from 0.1 to 2.5% by weight.
Claim 8
Dependent Claim
19 words
A concentrate according to claim 6, wherein the amount of the polymer is from 0.5 to 1.5% by weight.
Claim 9
Dependent Claim
19 words
A concentrate according to any preceding claim, wherein the average molecular weight of the polymer is at least 2000.
Claim 10
Dependent Claim
19 words
A concentrate according to any preceding claim, wherein the averave molecular weight of the polymer is at least 5000.
Claim 11
Dependent Claim
20 words
A concentrate according to any preceding claim, wherein the amount of suspended solid material is less than 10% by volume.
Claim 12
Dependent Claim
17 words
A concentrate according to any preceding claim, wherein the suspended solid material comprises a substantially water-insoluble bleach.
Claim 13
Dependent Claim
11 words
A concentrate according to claim 11, wherein the bleach comprises DPDA.
Claim 14
Dependent Claim
28 words
A concentrate according to any preceding claim, wherein the detergent active material comprises: (a) a nonionic surfactant and/or a polyalkoxylated anionic surfactant; and (b) a non-polyalkoxylated anionic surfactant.
Claim 15
Dependent Claim
22 words
A concentrate according to any preceding claim, wherein the detergent active material is at least 20% by weight of the total composition.
Claim 16
Dependent Claim
21 words
A concentrate according to claim 13, wherein the detergent active material is at least 25% by weight of the total composition.
Claim 17
Dependent Claim
23 words
A concentrate according to any preceding claim, having a viscosity of no greater than 850 mPaS at a shear rate of 21 S-1.
References Cited (Backward Citations)
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