WO1995014077B1 - Bleach activator compositions - Google Patents

Bleach activator compositions

Info

Publication number
WO1995014077B1
WO1995014077B1 PCT/GB1994/002520 GB9402520W WO9514077B1 WO 1995014077 B1 WO1995014077 B1 WO 1995014077B1 GB 9402520 W GB9402520 W GB 9402520W WO 9514077 B1 WO9514077 B1 WO 9514077B1
Authority
WO
WIPO (PCT)
Prior art keywords
liquid
phase
hydrogen peroxide
coating
process according
Prior art date
Application number
PCT/GB1994/002520
Other languages
French (fr)
Other versions
WO1995014077A1 (en
Filing date
Publication date
Priority claimed from GB939323634A external-priority patent/GB9323634D0/en
Application filed filed Critical
Priority to AU10316/95A priority Critical patent/AU1031695A/en
Priority to US08/640,928 priority patent/US6080710A/en
Priority to EP95900861A priority patent/EP0729504B1/en
Priority to DE69419773T priority patent/DE69419773T2/en
Publication of WO1995014077A1 publication Critical patent/WO1995014077A1/en
Publication of WO1995014077B1 publication Critical patent/WO1995014077B1/en

Links

Abstract

A process for making a coated bleach component which may be incorporated into a detergent composition comprising hydrogen peroxide solution. The process includes the steps of dispersing the bleach component in a continuous liquid phase to form discrete islands of dispersed phase and subsequently forming a polymeric coating at the interface between the dispersed phase and the continuous phase. The coating formed is resistant to hydrogen peroxide solution and is removable when the liquid continuous phase is diluted with aqueous wash liquor. In this way particulate material which reacts with hydrogen peroxide can be incorporated into an aqueous detergent liquid which contains dissolved hydrogen peroxide, whilst maintaining stability.

Claims

AMENDED CLAIMS[received by the International Bureau on 15 May 1995 (15.05.95); original claim 1 amended; new claims 7 and 12 added; original claims 7-10 amended and renumbered 8-11; remaining claims unchanged (2 pages)]
1. A process for making a coated peroxygen bleach component including the steps of dispersing the bleach component in a continuous liquid phase to form discrete islands of dispersed phase and then forming a polymeric coating at the interface between the dispersed phase and the continuous phase, the coating being resistant to hydrogen peroxide solution and being removable when the liquid continuous phase is diluted with aqueous wash liquor.
2. A process according to claim 1 in which the polymer is formed by azeotroping, coacervation or in situ polymerisation.
3. A process according to claim 2 in which the polymer coating is formed from a mixture of neutralised polyacrylates containing a propionic acid repeating unit:
R
*= ' CH2*r, co2x* where X is Na, K, NH4NH2CH2CH2 or H; R is CH3 or preferably H: and n is chosen to give a maximum molecular weight of 100000 and a polyamide: f H - CH2}„
CONH2 where m is chosen to give a large molecular weight backbone > 300000.
4. A method according to claim 3 in which the polymer coating further includes a crosslinker.
5. A process according to claim 4 in which the crosslinker is selected from urea, melamine, formaldehyde and urea formaldehyde or melamine formaldehyde resins.
6. A process according to claim 4 in which the crosslinker is polyvinyl pyrrolidine.
7. A process according to any preceding claim in which the peroxygen bleach component is selected from peroxygen bleach precursors, preferably inorganic persalts, and peroxygen bleach activators, preferably N- and O-acyl activator components.
8. A process according to claim 7 in which the bleach activator is tetra acetyl ethylene diamine (TAED) .
9. An aqueous detergent liquid including water, surfactant and dissolved hydrogen peroxide characterised in that the detergent liquid also includes a particulate material which reacts with hydrogen peroxide and the material is coated using a method including the steps of dispersing the particulate material in a continuous liquid phase to form discrete islands of dispersed phase and then forming a polymeric coating at the interface between the dispersed phase and the continuous phase, the coating being resistant to hydrogen peroxide solution and being removable when the liquid continuous phase is diluted with aqueous wash liquor.
10. A detergent liquid according to claim 9 in which the material is a solid.
11. A detergent liquid according to claim 9 or 10 in which the material is a peroxygen bleach component, preferably a peroxygen bleach activator, more preferably TAED.
12. A liquid according to any of claims 9 to 11 in which the coating method has any of the further features defined in claims 2 to 6.
AMENDED SHEET ARTICLE -9
PCT/GB1994/002520 1993-11-16 1994-11-16 Bleach activator compositions WO1995014077A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AU10316/95A AU1031695A (en) 1993-11-16 1994-11-16 Bleach activator compositions
US08/640,928 US6080710A (en) 1993-11-16 1994-11-16 Bleach activator compositions
EP95900861A EP0729504B1 (en) 1993-11-16 1994-11-16 Bleach activator compositions
DE69419773T DE69419773T2 (en) 1993-11-16 1994-11-16 BLEACH ACTIVATOR PREPARATIONS

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9323634.7 1993-11-16
GB939323634A GB9323634D0 (en) 1993-11-16 1993-11-16 Bleach activator compositions

Publications (2)

Publication Number Publication Date
WO1995014077A1 WO1995014077A1 (en) 1995-05-26
WO1995014077B1 true WO1995014077B1 (en) 1995-06-15

Family

ID=10745264

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1994/002520 WO1995014077A1 (en) 1993-11-16 1994-11-16 Bleach activator compositions

Country Status (7)

Country Link
US (1) US6080710A (en)
EP (1) EP0729504B1 (en)
AU (1) AU1031695A (en)
DE (1) DE69419773T2 (en)
ES (1) ES2135035T3 (en)
GB (1) GB9323634D0 (en)
WO (1) WO1995014077A1 (en)

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DE60210085T2 (en) * 2001-06-29 2006-11-09 The Procter & Gamble Company, Cincinnati STABILITY-RESISTANT PERSONALIZATION SYSTEM SUITABLE FOR TISSUE TREATMENT
DE10361100A1 (en) * 2003-06-13 2005-01-05 Henkel Kgaa Storage-stable capsules based on peroxycarboxylic acids
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