Forming in situ a composition consisting of two separately packaged constituents and dispensing assembly for carrying out this process
AssigneeL'oreal
InventorsJean-Francois Grollier, Lyonel Peritz, Herve F. Bouix
Life of this patent
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Abstract
A dispensing assembly for at least two constituents is provided having flexible walls and at least two compartments, including outlet orifices located adjacent to one another so that when the outlet orifices are opened as by cutting, and pressure is applied to the flexible walls, dispensing and immediate mixing of the constituents will be effected; the viscosity and volumes of the constituents are selected to have certain values to enable the dispensing to properly mix the constituents to form a homogenous product.
Claims17
A process for forming a composition in situ by mixing two constituents A and B to be simultaneously dispensed and used for hair coloration comprising the steps of:
- (a) taking two containers having a wall which is sufficiently deformable to enable simultaneous compression to be effected by successive squeezing actions by the user so as to dispense the contents of said containers and having outflow orifices adapted to be positioned adjacent to one another so that the constituents will contact each other upon dispensing with their outflow jets meeting each other, said outflow orifices being adapted to be opened simultaneously and each having a cross-section of from 0.1 to 75 mm.sup.2 ;
- (b) selecting constituents A and B which have individually and when mixed respective viscosities A, B, A+B, which, when measured under laminar flow conditions at a rate of 45 s.sup.-1 using a HAAKE "ROTOVISCO RV 100" viscometer at 25.degree. C., fulfil the following conditions:
- ______________________________________ .eta.A .ltoreq. 1,500 cP, .eta.B .ltoreq. 1,500 cP, .eta.A - .eta.B .ltoreq. 1,000 cP, .eta.A + B .ltoreq. 3,000 cP, ______________________________________
- one of said constituents including a foaming agent in a quantity between 0.1 and 30% by weight of the total weight of the composition;
- (c) taking volumes of the constituents A and B which satisfy the relationship:
- ##EQU3## and (d) packaging the constituents A and B separately in respective ones of said containers.
Dependencies are inferred from the claim text.