Patent US3851681A successfully refreshed from Google Patents.
EP0100125A2
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Liquid detergent compositions comprising coacervate mixture of alkylcellulose and carboxymethylcellulose and method for preparing them
Assignee: Procter and Gamble Co
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Filing: 1983-07-20
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Granted: —
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Expires: 2003-07-20
Abstract
Abstract Aqueous homogeneous liquid detergent compositions containing additive levels of alkylcellulose and carboxymethylcellulose and a mixture of anionic and nonionic surface-active agents are disclosed. The compositions have a pH in the neutral to mildly alkaline range. The alkylcellulose/carboxymethyl- cellulose is present as a coacervate capable of forming, in combination with the surfactants, a network of loosely associated droplets. This network is tridimensional and provides means for stably and homogeneously suspending detergent components/additives which otherwise could not be incorporated, particularly ingredients which are substantially insoluble in the liquid compositions.
Inventors
- 👤 Jean Wevers
- 👤 Barry Stoddart
- 👤 Christian Barrat
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 15:10
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/0005; C11D3/0036; C11D1/00; C11D1/66; C11D1/83; C11D10/00; C11D10/04; C11D17/00; C11D17/0008; C11D17/0026; C11D3/16; C11D3/20; C11D3/22; C11D3/222; C11D3/225; C11D3/38; C11D3/386; C11D3/38618; C11D1/02; C11D1/04; C11D1/12; C11D1/14; C11D1/143; C11D1/22; C11D1/72
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
124 words
An aqueous, homogeneous liquid detergent composition containing surface-active agents, anti-redeposition agents, and optionally conventional ingredients for the like compositions, characterized in that it contains : - from 0.1% to 3% by weight of a coacervate of C l -C 4 alkyl, possibly hydroxylated, cellulose(AC) and carbcxymethyl- cellulose(CMC) in a weight ratio of CMC:AC of from 6:1 to 1:4; - more than 20% by weight of a mixture of anionic and nonionic surface-active agents whereby the nonionic surfactant represents more than 3% by weight and whereby the weight ratio of anionic to nonionic is in the range from 1:1 to 8:1; and - more than 10% by weight of water, whereby the weight ratio of the total ingredients to water is from 1:1 to 9:1.
Claim 2
Dependent Claim
124 words
An aqueous, homogeneous liquid detergent composition containing surface-active agents, anti-redeposition agents, and optionally conventional ingredients for the like compositions, characterized in that it contains : - from 0.1% to 3% by weight of a coacervate of C l -C 4 alkyl, possibly hydroxylated, cellulose(AC) and carbcxymethyl- cellulose(CMC) in a weight ratio of CMC:AC of from 6:1 to 1:4; - more than 20% by weight of a mixture of anionic and nonionic surface-active agents whereby the nonionic surfactant represents more than 3% by weight and whereby the weight ratio of anionic to nonionic is in the range from 1:1 to 8:1; and - more than 10% by weight of water, whereby the weight ratio of the total ingredients to water is from 1:1 to 9:1.
Claim 3
Dependent Claim
23 words
The composition in accordance with Claim 1 wherein the weight ratio of CMC to AC is in the range- from 3:1 to 1:1.
Claim 4
Dependent Claim
20 words
The composition in accordance with Claim 1 having a pH, measured "as is" at 20°C of from 6.0 to 10.
Claim 5
Dependent Claim
18 words
The composition in accordance with Claim 1 wherein the AC-CMC coacervate represents from 0.5% to 1.5% by weight.
Claim 6
Dependent Claim
31 words
The composition in accordance with Claim 1 wherein at least 5% by weight, calculated on the detergent composition, of the anionic surface-active agent is represented by a non-soap anionic surface-active agent.
Claim 7
Dependent Claim
25 words
The composition in accordance with Claim 1 wherein the ratio of the anionic to nonionic surface-active agents is in the ratio from 4:1 to 1:1.
Claim 8
Dependent Claim
61 words
The composition in accordance with Claim 1 wherein the mixture of anionic and nonionic surface-active agents represents from 25% to 60% by weight and wherein the nonionic surface-active agent is an ethoxylated nonionic having a hydrophilic-lipophilic balance (HLB) in the range from 9 to 1 5 and the non-soap anionic surface-active agent is a C 10 -C l3 -alkyl benzene sulfonate.
Claim 9
Dependent Claim
36 words
The composition in accordance with Claim 1 containing a tridimensional coacervate network and from 1% to 10% by weight of composition-insoluble detergent additives having a particle size in the range from 1 micron to 100 microns.
Claim 10
Dependent Claim
60 words
The composition in accordance with Claim 1 containing in addition: - from 0.01% to 1% by weight of a mixture of proteases and alpha-amylases; - from 0.05% to 2% by weight of a polyacid; - up to 5% by weight of nonionic, semipolar nonionic and cationic co-surface-active agents; and - from 0.1% to 3% by weight of formic acid salts.
Claim 11
Independent Claim
89 words
A method for preparing the aqueous homogeneous liquid detergent in accordance with Claims 1, 5 and 8, comprising the following steps: - adding the non-soap anionic surface-active agent to an aqueous solution of the mixture of cellulose ethers to thereby forming, under mixing, a primary coacervate; followed by - adding under mixing the remainder of the anionic surface-active agents; and subsequently - adding under mixing the nonionic surface-active agents to thereby form a coacervate network, with the further proviso during the mixing operations the pH is maintained above 6.Q.
References Cited (Backward Citations)
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