Compositions – Electrolytes for electrical devices
Patent
1995-02-08
1996-02-27
Albrecht, Dennis
Compositions
Electrolytes for electrical devices
252 891, 252 95, 252102, 252118, 252121, 252173, 252174, 25217412, 25217413, 25217415, 25217418, 25217421, 25217423, 25217425, 25218625, 252542, 252DIG12, 252DIG14, 435187, 435188, 502407, C11D 314, C11D 3386, C11D 3395, C11D 1100
Patent
active
054946000
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to detergent active compounds and use thereof in liquid detergent compositions. More particularly, it relates to detergent active compounds having improved storage stability within a full detergent composition.
BACKGROUND OF THE INVENTION
There are many detergent active materials which require protection from atmospheric moisture, air and co-ingredients of compositions with which they are formulated.
Some of these actives include enzymes, bleaches, colourants, catalysts and other detergent active compounds.
For instance, it is well known in the art that enzyme deactivation occurs in aqueous detergent compositions containing proteolytic enzymes or mixtures of enzymes one of which is proteolytic.
The loss of detergent activity of said detergent active compounds, also referred to as detergent instability has already been retarded by chemical stabilization methods.
Yet the effectiveness of these methods tend to be limited in that different chemicals at different levels are needed to protect different detergent active compounds.
Therefore, it is an object of the present invention to provide a stabilization system that can be used to protect any detergent active compound in any detergent formulation.
According to the present invention, a detergent additive is provided comprising a hydrophillic detergent active compound characterized in that said compound is mixed with a surfactant before absorption into a porous hydrophobic material, said porous material subsequently being coated with a hydrophobic material.
According to one embodiment, the present invention provides detergent compositions comprising detergent active compounds which have improved stability upon storage.
According to another embodiment, the porous hydrophobic material comprising a detergent active compound being absorbed into said hydrophobic material can be used to store said detergent active compounds in the form of non-dusting granulates.
SUMMARY OF THE INVENTION
The present invention provides a detergent additive comprising a water-soluble or water-dispersible detergent active compound characterized in that a mixture of said compound with a surfactant is absorbed into a porous hydrophobic material, said porous material being coated with a hydrophobic material.
DETAILED DESCRIPTION OF THE INVENTION
The present invention relates to a stabilization system for detergent active compounds having improved storage stability within a full detergent composition.
As utilized herein "stabilization" refers to protecting the detergent active compounds by isolating and protecting them from their hostile environment upon storage but releasing said compounds during washing conditions.
According to the present invention the detergent active compounds are isolated from their hostile environment by reversibly absorbing said compounds into a porous hydrophobic material.
In this way, the porous hydrophobic material serves as a "cage" wherein the detergent active compound is enclosed. Subsequently, the pores of the detergent additive filled hydrophobic porous material are sealed by dispersing said porous material into a hydrophobic liquid.
By sealing the pores of the hydrophobic material, the hydrophobic liquid acts as a "shell", thereby protecting the detergent additive from its environment.
It has now been found that by using the "shell and cage" system of the present invention the loss of activity of the detergent active compounds is substantially reduced.
Moreover, it has been found that the protected detergent active compound according to the present invention can be readily released under washing conditions without losing the ability to perform its normal function.
More in particular, the present invention provides a detergent additive comprising a hydrophillic detergent active compound characterized in that said compound is mixed with a surfactant before absorption into a porous hydrophobic material, said porous material subsequently being coated with a hydrophobic material.
The present invention
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Jones Roger J.
Surutzidis Athanasios
Albrecht Dennis
Patel Ken K.
Rasser Jacobus C.
The Procter & Gamble & Company
Yetter Jerry J.
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