Patent EP0356239A2 successfully refreshed from Google Patents.
EP0356239A2
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Detergent compositions
Assignee: Ciba Specialty Chemicals Water Treatments Ltd
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Filing: 1989-08-24
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Granted: —
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Expires: 2009-08-24
Abstract
Abstract Enzyme for inclusion in liquid detergent concentrates is provided as a stable dispersion of small particles that also include a protective polymeric material comprising a polymeric shell and/or matrix, the particles having been provided by reverse phase azeotroping and/or by coacervation.
Inventors
- 👤 John Langley
- 👤 Kenneth Charles Symes
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 05:33
CPC Classifications
C; C12; C12N; C12N11/00; C12N11/02; C12N11/04; A; A01; A01N; A01N25/00; A01N25/08; A01N25/10; A01N25/26; A01N25/28; A01N33/00; A01N33/16; A01N33/18; A01N43/00; A01N43/90; A01N47/00; A01N47/08; A01N47/28; A01N47/30; A01N57/00; A01N57/10; A01N57/16; A61; A61K; A61K9/00; A61K9/14; A61K9/16; A61K9/1605; A61K9/1629; A61K9/1635; A61K9/48; A61K9/50; A61K9/5005; A61K9/5021; A61K9/5026; B; B01; B01J; B01J13/00; B01J13/02; B01J13/06; B01J13/10; B01J13/12; B01J13/125; C11; C11D; C11D3/00; C11D3/16; C11D3/37; C11D3/3746; C11D3/3769; C11D3/38; C11D3/386; C11D3/38663; C11D3/38672
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
109 words
A liquid composition comprising a substantially stable dispersion in a liquid phase of particles comprising a detergent enzyme and a protective polymeric material that is impermeable to liquid detergent concentrates but which releases the enzyme when agitated in aqueous wash liquor and that comprises an outer polymeric shell and/or a polymeric matrix through which the enzyme is distributed, and the particles have a size below 20µm and have been made by a process comprising (a) forming a dispersion of an aqueous phase containing the enzyme in a water immiscible liquid in the presence of dispersion stabiliser and azeotroping the dispersion and/or (b) forming an outer polymeric shell by coacervation.
Claim 2
Dependent Claim
109 words
A liquid composition comprising a substantially stable dispersion in a liquid phase of particles comprising a detergent enzyme and a protective polymeric material that is impermeable to liquid detergent concentrates but which releases the enzyme when agitated in aqueous wash liquor and that comprises an outer polymeric shell and/or a polymeric matrix through which the enzyme is distributed, and the particles have a size below 20µm and have been made by a process comprising (a) forming a dispersion of an aqueous phase containing the enzyme in a water immiscible liquid in the presence of dispersion stabiliser and azeotroping the dispersion and/or (b) forming an outer polymeric shell by coacervation.
Claim 3
Dependent Claim
42 words
A composition according to claim 1 in which the particles have been made by a process comprising forming a dispersion of an aqueous phase containing the enzyme in a water immiscible liquid in the presence of dispersion stabiliser and azeotroping the dispersion.
Claim 4
Dependent Claim
15 words
A composition according to claim 2 in which the stabiliser is an amphipathic polymeric stabiliser.
Claim 5
Dependent Claim
30 words
A composition according to claim 2 or claim 3 in which the matrix polymer is formed by including the polymer as a solution or emulsion in the dispersed aqueous phase.
Claim 6
Dependent Claim
29 words
A composition according to claim 4 in which the matrix polymer has been chemically modified during or after the azeotroping to render it less permeable to liquid detergent concentrate.
Claim 7
Dependent Claim
29 words
A composition according to any of claims 2 to 5 in which the particulate composition comprises an outer shell that has been deposited around the particles formed by azeotroping.
Claim 8
Dependent Claim
25 words
A composition according to claim 6 in which the particles also comprise a hydrophobic material between the outer shell and the particles formed by azeotroping.
Claim 9
Dependent Claim
18 words
A composition according to claim 6 or claim 7 in which the polymeric shell is a coacervate coating.
Claim 10
Dependent Claim
56 words
A composition according to claim 8 in which the particles have been made by forming a dispersion of the core particles in non-aqueous liquid, forming an emulsion of droplets of the dispersion in an aqueous medium and coating the droplets by coacervation of polymeric material while dispersed in the aqueous medium to form a coacervate dispersion.
Claim 11
Dependent Claim
28 words
A composition according to any preceding claim in which the protective polymeric material is an addition polymer of ethylenically unsaturated ionic monomer optionally with ethylenically unsaturated non-ionic monomer.
Claim 12
Dependent Claim
16 words
A composition according to any preceding claim in which the particles are below 3µm in size.
References Cited (Backward Citations)
No citation records indexed.
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