Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – Liquid composition
Reexamination Certificate
2000-07-07
2002-11-05
Webb, Gregory E. (Department: 1751)
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
Liquid composition
C510S224000, C510S284000, C510S406000, C510S444000, C510S446000
Reexamination Certificate
active
06475973
ABSTRACT:
BACKGROUND OF THE INVENTION
Cleansing compositions are generally a single phase or an oily phase dispersed in a watery cleansing phase. When significant quantities of an oily phase are present, due to presence of lipophilic type components, substantial efforts are usually made to provide a stable emulsion, which does not come apart. However, there can be significant advantages to having two or more phases present in a single container during non-use. Said advantages can be either esthetical or functional when related to product efficiency or ingredients stability. These phases can be appealing to the eye depending upon various agents; particularly coloring agents dispersed therein or present at the interface of the phases. A small amount of shaking by the user prior to end use can create mixing of the phases and at times a bubbly-type appearance. Emulsion(s) can be formed during the mixing and can be present during the actual cleansing. Upon non-agitation, the phases once more readily separate into two or more phases and are ready for the next cleansing, for example, twenty-four hours later when using a hard surface cleaning composition. However, making two aqueous phases is not readily achievable.
SUMMARY OF THE INVENTION
The present invention relates to a two phase liquid cleaning composition containing a nonionic surfactant, a zwitterionic surfactant, and/or an anionic surfactant, a glycol ether, a solubilizing agent, a water insoluble inorganic compound, optionally, an acid and water.
DETAILED DESCRIPTION OF THE INVENTION
The present invention relates to a liquid cleaning composition which contains a lower aqueous phase and an upper oily phase, the lower aqueous phase and the upper oily phase are in a 40:60 to 95:5 ratio, wherein the liquid cleaning composition comprises approximately by weight:
(a) 0.1% to 10% of an ethoxylated nonionic surfactant, wherein 80% to 100% of said nonionic being in said upper oil phase and 0 to 20% of said nonionic surfactant being in said lower aqueous phase; or distributed between said upper and lower phase according to partition coefficient of the said ingredient;
(b) 0.1% to 5% of a second surfactant selected from the group consisting of zwitterionic surfactant and anionic surfactants and mixtures thereof, wherein 90% to 100% of said second surfactant being in said lower aqueous phase and 0 to 10% of said second surfactant being in said upper oily phase; or distributed between said upper and lower phase according to partition coefficient of the said ingredient;
(c) 0.1% to 10% of a water insoluble organic compound wherein at least 98% of said water insoluble organic compound is contained in said upper oily phase;
(d) 0.05% to 2% of a perfume, wherein at least 98% of said perfume is contained in said upper oily phase; or distributed between said upper and lower phase according to partition coefficient of the said ingredient;
(e) 0.1% to 10% of a solubilizing agent such as a C
2
-C
3
alkanol, wherein 60% to 90% of said solubilizing agent being in said lower aqueous phase and 10% to 40% of said solubilizing agent being in said upper oily phase;
(f) 0.1% to 20% of a glycol ether, wherein 80% to 100% of said glycol ether being in said upper oily phase and 0 to 20% of said glycol ether being in said lower phase;
(g) 0 to 3% of an acid selected from the group consisting of an organic acid and an inorganic acid and mixtures thereof, wherein at least 90% of said acid being in said lower aqueous phase; and
(h) 60% to 99.5% of water, said water being in said lower aqueous phase.
Excluded from the instant cleaning compositions are a hydrophilic polymer or copolymer selected from the group consisting of polyacrylate, polystyrene sulfonate, polyvinyl pyrrolidene or maleic anhydride and mixtures thereof.
The nonionic surfactant is present in amounts of about 0.1% to 10%, preferably 0.25% to 8% by weight of the composition and provides superior performance in the removal of oily soil.
The water soluble nonionic surfactants utilized in this invention are commercially well known and include the primary aliphatic alcohol ethoxylates, secondary aliphatic alcohol ethoxylates, alkylphenol ethoxylates and ethylene-oxide-propylene oxide condensates on primary alkanols, such a Plurafacs (BASF) and condensates of ethylene oxide with sorbitan fatty acid esters such as the Tweens (ICI). The nonionic synthetic organic detergents generally are the condensation products of an organic aliphatic or alkyl aromatic hydrophobic compound and hydrophilic ethylene oxide groups. Practically any hydrophobic compound having a carboxy, hydroxy, amido, or amino group with a free hydrogen attached to the nitrogen can be condensed with ethylene oxide or with the polyhydration product thereof, polyethylene glycol, to form a water-soluble nonionic detergent. Further, the length of the polyethenoxy chain can be adjusted to achieve the desired balance between the hydrophobic and hydrophilic elements.
The nonionic detergent class includes the condensation products of a higher alcohol (e.g., an alkanol containing about 8 to 18 carbon atoms in a straight or branched chain configuration) condensed with about 1 to 30 moles of ethylene oxide, for example, lauryl or myristyl alcohol condensed with about 16 moles of ethylene oxide (EO), tridecanol condensed with about 6 to moles of EO, myristyl alcohol condensed with about 10 moles of EO per mole of myristyl alcohol, the condensation product of EO with a cut of coconut fatty alcohol containing a mixture of fatty alcohols with alkyl chains varying from 10 to about 14 carbon atoms in length and wherein the condensate contains either about 6 moles of EO per mole of total alcohol or about 9 moles of EO per mole of alcohol and tallow alcohol ethoxylates containing 6 EO to 11 EO per mole of alcohol.
A preferred group of the foregoing nonionic surfactants are the Neodol ethoxylates (Shell Co.), which are higher aliphatic, primary alcohol containing about 9-15 carbon atoms, such as C
9
-C
11
alkanol condensed with 2 to 10 moles of ethylene oxide (Neodol 91-2.5), C
12-13
alkanol condensed with 1.1 to 6.5 moles ethylene oxide (Neodol 23-2), C
12-15
alkanol condensed with 2.5 to 9 moles ethylene oxide (Neodol 25-3), C
14-15
alkanol condensed with 4 to 7 moles ethylene oxide (Neodol 45-4), and the like. Such ethoxamers have an HLB (hydrophobic lipophilic balance) value of about 6 to 15 and give good O/W emulsification.
Additional satisfactory alcohol ethylene oxide condensates are the condensation products of a secondary aliphatic alcohol containing 8 to 18 carbon atoms in a straight or branched chain configuration condensed with 1 to 30 moles of ethylene oxide. Examples of commercially available nonionic detergents of the foregoing type are C
11
-C
15
secondary alkanol condensed with either 9 EO (Tergitol 15-S-9) or 12 EO (Tergitol 15-S-12) marketed by Union Carbide.
Other suitable nonionic detergents include the polyethylene oxide condensates of one mole of alkyl phenol containing from about 8 to 18 carbon atoms in a straight- or branched chain alkyl group with about 1 to 30 moles of ethylene oxide. Specific examples of alkyl phenol ethoxylates include nonyl phenol condensed with about 2-10 moles of EO per mole of nonyl phenol, dinonyl phenol condensed with about 2-12 moles of EO per mole of phenol, dinonyl phenol condensed with about 2-15 moles of EO per mole of phenol and di-isoctylphenol condensed with about 15 moles of EO per mole of phenol. Commercially available nonionic surfactants of this type include Igepal CO-630 (nonyl phenol ethoxylate) marketed by GAF Corporation.
Also among the satisfactory nonionic detergents are the condensation products of a C
8
-C
20
alkanol with a heteric mixture of ethylene oxide and propylene oxide wherein the weight ratio of ethylene oxide to propylene oxide is from 2.5:1 to 4:1, preferably 2.8:1 to 3.3:1, with the total of the ethylene oxide and propylene oxide (including the terminal ethanol or propanol group) being from 60-85%, preferably 70-80%, by weight. Such detergents are commercially available from BA
Colgate-Palmolive Corp
Nanfeldt Richard E.
Webb Gregory E.
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