EP1645264A1
Expired / Lapsed
EP
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Product for hair dyeing in a two chamber aerosol can
Assignee: Kao Germany GmbH
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Filing: 2004-09-21
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Granted: —
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Expires: 2024-09-21
Abstract
Abstract This invention relates to a product for dyeing hair consisting of a two chamber pressurised can and an aqueous composition comprising at least one oxidative dye precursor and optionally at least one coupling agent and optionally at least one direct dye which is mixed with an aqueous composition comprising at least one oxidizing agent prior to application in an aqueous base.
Inventors
- 👤 Peter Lamboy
- 👤 Herbert Vogelsang
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 11:12
CPC Classifications
A; A61; A61Q; A61Q5/00; A61Q5/10; A61K; A61K8/00; A61K8/02; A61K8/04; A61K8/046; A61K8/18; A61K8/30; A61K8/40; A61K8/41; A61K8/418; A61K2800/00; A61K2800/80; A61K2800/88
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
170 words
Product for oxidative coloring hair consisting of a packaging and an aqueous oxidative colouring composition to be mixed with a composition comprising at least one oxidizing agent prior to application characterised in that the packaging is a pressurised can (1) consisting of an outer wall (2) having a closure (3) with a valve (5) and a bottom (4) with a stopper (6) which contains a vertically movable unsupported piston (7) with a deepened area (10) in middle of the piston, which further fits physically to the closure area when moved up during emptying the package, the movable piston (7) further divides the whole chamber into two completely chambers (8 and 9), one (8) being filled with an aqueous oxidative dyeing composition and the other (9), being the lower part, is filled with an oxygen free, non-flammable gas to build up pressure inside can and an aqueous oxidative colouring composition comprising at least one oxidative dye precursor and optionally at least one coupling agent and optionally at least one direct dye.
Claim 2
Dependent Claim
24 words
Product according to claim 1 characterised in that oxygen free, non-flammable gas is selected from nitrogen, carbon dioxide and dinitrogen oxide (N 2 O).
Claim 3
Dependent Claim
39 words
Product according to claims 1 and 2 characterised in that the aqueous colouring composition has a viscosity in the range from 1,000 to 50,000 mPa.s measured at 20°C with a Brookfiled viscosimeter with a spindle 5 at 5 rpm.
Claim 4
Dependent Claim
24 words
Product according to any of the preceding claims characterised in that it comprises at least one coupling substance in addition to oxidative dye precursor.
Claim 5
Dependent Claim
26 words
Product according to any of the preceding claims characterised in that it comprises at least one direct dye selected from anionic, cationic and neutral nitro dyes.
Claim 6
Dependent Claim
13 words
Product according to claim 5 that the direct dye is cationic hair dye.
Claim 7
Dependent Claim
14 words
Product according to claim 5 that the direct dye is neural nitro hair dye.
Claim 8
Dependent Claim
25 words
Product according to any of the preceding claims characterised in that the aqueous oxidative dyeing composition is an emulsion and comprises at least one emulgator.
Claim 9
Dependent Claim
214 words
Process for obtaining oxidative hair dyeing product consisting of a pressurised can and an aqueous composition according to any of the preceding claims characterised in that a- the can (1) is first placed in a filling place, b- by means of extendable filling nozzle entering the can through the closure area, the movable piston (7) is pushed to the very bottom of the can which is followed by purging the can content with an oxygen free gas, preferably same as the pressurising gas and is selected from nitrogen and carbon dioxide, through a nozzle which may be same or different to the filling nozzle, c- through the opening (6) at the bottom (4) the lower part of the can is purged with oxygen free gas preferably same as the pressurising gas and is selected from nitrogen and carbon dioxide, d- pushing the piston (7) down again through the opening with an extendable nozzle and filling the colouring composition already produced into can into the upper part (8), e- purging the upper space of the can again left after filling the composition with an oxygen free gas, f- placing the closure and valve on top of the can, and g- pressurised gas is filled into to lower part (9) and stopper (plug) is placed (6).
Claim 10
Dependent Claim
20 words
Process according to claim 9 characterised in that the steps b and c are carried out in the opposite order.
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