Compositions containing organic oil-in-water emulsions,...

Details Compositions containing organic oil-in-water emulsions,... Compositions containing organic oil-in-water emulsions,...

2000-09-25

2003-11-25

Padmanabhan, Sreeni (Department: 1619)

Drug, bio-affecting and body treating compositions

Preparations characterized by special physical form

Cosmetic, antiperspirant, dentifrice

C424S065000, C424S070120, C424S078030, C514S063000, C514S938000

Reexamination Certificate

active

06652867

ABSTRACT:

CROSS-REFERENCE TO RELATED APPLICATIONS
Not applicable.
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
Not applicable.
REFERENCE TO A MICROFICHE APPENDIX
Not applicable.
FIELD OF THE INVENTION
This invention is directed to organic oil-in-water (O/W) emulsions, and to certain compositions containing such organic O/W emulsions in combination with a salt, an alcohol, a solvent, or a combination of the salt, the alcohol, and the solvent.
BACKGROUND OF THE INVENTION
Emulsions prepared with conventional organic surfactants are generally not stable in the presence of an alcohol or a solvent. When an ionic surfactant is used, the emulsions are not stable in the presence of salts. In fact, salts, lower alkyl alcohols, and certain organic solvents, are routinely used to break emulsions into separate phases to analyze content.
However, it has been found that when a silicone polyether is used to make an organic oil-in-water emulsion or a silicone polyether is added to a previously prepared organic oil-in-water emulsion, that the organic oil-in-water emulsion is stable in the presence of a salt, an alcohol, an organic solvent, or a combination thereof. Such stability is an advantage and benefit in personal care, household care, automotive care, and coating industry applications.
U.S. Pat. No. 5,216,070 (Jun. 1, 1993) is directed to preparation of organic oil-in-water emulsions using silicone polyethers, however it arrives at the composition by a complex inversion process in which a water soluble organic monomer is dispersed in an aqueous phase. In contrast, the method according to the present invention achieves a similar result directly without inversion, and uses instead water insoluble or only partially water soluble organic monomers in an oil phase.
U.S. Pat. No. 5,443,760 (Aug. 22, 1995) is directed to oil-in-water emulsions containing silicone polyethers, but the oil phase of the oil-in-water emulsion includes silicone oils rather than only organic oils.
U.S. Pat. No. 5,891,954 (Apr. 6, 1999) is directed to silicone oil-in-water emulsions prepared with silicone polyethers which are stable in the presence of an alcohol, however the silicone polyethers are only post added to previously prepared silicone oil-in-water emulsions, and it fails to teach using only organic oils in the oil phase of oil-in-water emulsion or the stability of the emulsions in the presence of salt and solvents.
U.S. Pat. No. 5,969,038 (Oct. 19, 1999) is directed to silicone oil-in-water emulsions which are stable in the presence of a salt, but it does not use silicone polyethers, and it fails to teach using only organic oils in the oil phase of the oil-in-water emulsion, as well as the stability of the emulsions in the presence of alcohols and solvents.
BRIEF SUMMARY OF THE INVENTION
This invention relates to new compositions of matter. In particular, there are four compositions. In a first embodiment, a composition is prepared by combining a salt component and an organic O/W emulsion which contains an organic oil, a surfactant(s), and water. In a second embodiment, a composition is prepared by combining an alcohol component and the organic O/W emulsion containing the organic oil, surfactant(s), and water. In a third embodiment, a composition is prepared by combining a solvent component and the organic O/W emulsion containing the organic oil, surfactant(s), and water. In a fourth embodiment, a composition is prepared by combining the salt component, the alcohol component, the solvent component, or combinations thereof, and the organic O/W emulsion containing the organic oil, surfactant(s), and water.
These and other features of the invention will become apparent from a consideration of the detailed description.
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING
Not applicable.
DETAILED DESCRIPTION OF THE INVENTION
This invention is based on the unexpected discovery that when silicone polyethers are used to prepare organic oil-in-water emulsions, the resulting formulations are stable in the presence of salts such as calcium chloride and aluminum sulfate; alcohols such as methanol, ethanol, propanol and isopropanol; and organic solvents such as pentane.
The silicone polyether can be the only emulsifier used in making these emulsion; it can be used in combination with other organic type surfactants; or it can be post added to a previously prepared emulsion. The silicone polyether can be used to make organic oil-in-water microemulsions which are also stable in the presence of such salts, alcohols, and solvents.
Silicone Polyether (SPE) Surfactant
The silicone polyether is generally water soluble or water dispersible. It can have a rake type structure wherein the polyoxyethylene or polyoxyethylene-polyoxypropylene copolymeric units are grafted onto the siloxane backbone, or the SPE can have an ABA block copolymeric structure wherein A represents the polyether portion and B the siloxane portion of an ABA structure.
Silicone polyethers suitable for use herein have the formula MD
0-1,000
D′
1-100
M, most preferably the formula MD
0-500
D′
1-50
M, where M represents monofunctional unit R
3
SiO
1/2
, D represents difunctional unit R
2
SiO
2/2
, and D′ represents difunctional unit RR′SiO
2/2
. In these formulas, R is an alkyl group containing 1-6 carbon atoms or an aryl group, and R′ is an oxyalkylene containing moiety. The R′ groups may contain only oxyethylene (EO) units; a combination of oxyethylene (EO) and oxypropylene (PO) units; or a combination of oxyethylene (EO) units, oxypropylene (PO) units, and oxybutylene (BO) units. Preferred R′ groups include oxyalkylene units in the approximate ratio of EO
3-100
PO
0-100
, most preferably in the ratio EO
3-30
PO
1-30
.
R′ moieties typically includes a divalent radical such as —C
m
H
2m
— where m is 2-8 for connecting the oxyalkylene portion of R′ to the siloxane backbone. Such moieties also contain a terminating radical for the oxyalkylene portion of R′ such as hydrogen, hydroxyl, or an alkyl, aryl, alkoxy, or acetoxy group.
Silicone polyethers useful herein can also be of a type having the formula M′D
10-000
D′
0-100
M′, most preferably the formula M′D
10-500
D′
0-50
M′, wherein M′ represents monofunctional unit R
2
R′SiO
1/2
, D represents difunctional unit R
2
SiO
2/2
, and D′ represents difunctional unit RR′SiO
2/2
. In these formulas, R can be an alkyl group containing 1-6 carbon atoms or an aryl group, and again R′ represents an oxyalkylene containing moiety. As noted previously, R′ groups typically contain only oxyethylene (EO) units or combinations of oxyethylene (EO) and oxypropylene (PO) units. Such R′ groups include these oxyalkylene units in the ratio EO
3-100
PO
0-100
, most preferably EO
3-30
PO
1-30
.
As also noted previously, R′ moieties typically include a divalent radical —C
m
H
2m
— where m is 2-8 for connecting the oxyalkylene portions of R′ to the siloxane backbone. In addition, the moiety R′ contains a terminating radical for oxyalkylene portions of R′ such as hydrogen, hydroxyl, an alkyl, aryl, alkoxy, or acetoxy group.
In addition, silicone polyethers useful herein can be of a type having the formula MD
0-1,000
D′
0-100
D″
1-1,00
M wherein D″ represents difunctional unit RR″SiO
2/2
, and R″ is an alkyl group containing 1-40 carbon atoms. M, D, D′, and R, are the same as defined above.
Table I shows some representative silicone polyethers according to such formulas, and these compositions are referred to in the accompanying Examples.
TABLE I
Silicone Polyether
Nominal Structure of the Silicone Polyether
A
MD
8.6
D′
3.6
M where R is —CH
3
and R′
is —(CH
2
)
3
(EO)
12
OH
B
MD
108
D′
10
M where R is —CH
3
and R′
is —(CH
2
)
3
(EO)
10
(PO)
4
OH
C
M′D′
75
M′ where R is —CH
3
and R′
is —(CH
2
)
3
(EO)
18
(PO)
18
OAc
D
M′D′
50
M′ where R is —CH
3
and R′
is —(CH
2
)
3
(E

Affiliated with

Also associated with

Rating

Compositions containing organic oil-in-water emulsions,... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Compositions containing organic oil-in-water emulsions,..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Compositions containing organic oil-in-water emulsions,... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3118449