Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – Specific organic component
Reexamination Certificate
2000-05-04
2002-09-17
Kopec, Mark (Department: 1751)
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
Specific organic component
C510S273000, C510S382000, C510S405000, C510S470000, C510S505000, C106S287100
Reexamination Certificate
active
06451755
ABSTRACT:
This invention relates to a method of stabilizing aqueous organosilane/fluoroorganosilane solutions containing silicon bonded hydrolysable groups.
BACKGROUND ART
Aqueous organo/fluoroorganosilanes solutions containing silicon bonded hydrolysable groups have several uses. The hydrolysable groups enable such compounds to irreversibly attach themselves to substrates containing hydroxyl or other silicone reactive species.
The significance of this ‘tethering’ action, in this instance, is to retard re-soiling, impart shine and make easier to clean a variety of bathroom surfaces such as enamel, plastic and porcelain, also giving residual antimicrobial/algicidal activity.
It is desirable that the ‘tethering’ agent is delivered via a predominately aqueous media with minimal solvent content.
SUMMARY OF THE INVENTION
Studies undertaken by the present inventor in order to accomplish the above purpose revealed that the use of one or more non-ionic surface active agents, one of which should be an alkyl saccharide, together with a silane derivative produced an improved detergent composition which helps to prevent re-soiling, gives residual antimicrobial/algicidal properties and residual ‘Shine’ characteristics. Accordingly, in one embodiment the subject invention provides a solution as defined in claim
1
comprising an alkyl saccharide surface active agent and a silane derivative, and in another embodiment the subject invention is directed to use of said alkyl saccharide in storage stable compositions.
Hard surface cleaning can be achieved with the composition of the subject invention in the absence of water soluble organic quaternary ammonium compounds contrary to the disclosure in a previously published patent U.S. Pat. No. 5,411,585. The composition, instead, stabilizes the organosilane/fluoroorganosilane by the use of saccharides sometimes with an additional non-ionic co-surfactant. For environmental reasons the absence of ammonium quaternary compounds is desired.
Other and further objects, features and advantages of the invention will appear more fully from the following description.
DETAILED DESCRIPTION
All amounts given herein (in the absence of a statement of the contrary) are given as amounts by weight of the total amount of the aqueous solution of the subject invention.
Organosilanes which can be used in the invention are disclosed in reference U.S. Pat. No. 5,411,585.
The organosilanes having hydrolysable groups which are useful in this invention form clear solutions in water at room temperature (20° C.) at least to the extent of the active concentration level to be used in the aqueous solutions. Examples of such organosilanes are methyltrimethoxysilane, 3-(trimethoxysilyl)propyldimethyl-octadecyl ammonium chloride and 3-(trimethoxysilyl)propyl-methyldi(decyl)ammonium chloride. We have found that compounds which do not give clear solutions in water at 20° C., such as 3-(triethoxysilyl)propoyldimethyloctadecyl ammonium chloride are not useful in the present invention.
As mentioned above, the aqueous organosilane/fluoroorganosilane solutions of the subject invention are stable solutions. Stable solutions are clear solutions which do not show haze.
Preferably said solutions are storage stable, i.e. said solutions are clear and non-hazy after storage.
More preferably said storage stable solutions are clear and non-hazy after storage at room temperature (20° C.) for 6 months, even more preferably after such storage for 1 year.
Preferably said organosilanes have structural formula
A
3−x
B
x
SiD (1)
wherein each
A is —OH or a hydrolysable group,
B is an alkyl group of from 1 to 4 carbon atoms,
x has a value of 0, 1 or 2, and
D is a hydrocarbon group of from 1 to 4 carbon atoms, a fluoro substituted (otherwise substituted or unsubstituted) hydrocarbon group, phenyl, or a nonionic or cationic, substituted-hydrocarbon group containing at least one oxygen or nitrogen group or salts of such substituted-hydrocarbon groups.
In the above formulas, A is —OH or a hydrolysable group such as a halide like —Cl, —Br and —I, alkoxy or alkoxyether such as those of the formula —OR
1
and —OR
2A
OR
1
where each R
1
is R
2
or hydrogen, R
2
is an alkyl group of from 1 to 4 carbon atoms such as methyl, ethyl, propyl, butyl or —CH
2
CH
2
CH
2
(CH
3
), with methyl being preferred, and R
2A
is a divalent saturated hydrocarbon group of from 1 to 4 carbon atoms such as methylene, ethylene, propylene, butylene or —CH
2
CH
2
CH(CH
3
)— with ethylene and propylene being preferred; amino such as —N(R
1
)
2
such as —NHCH
3
, —N(CH
3
)
2
and —N(CH
2
CH
2
)
2
, also including organosilazanes where two organosilanes are combined by a —NH— unit; acetoxy which is —OOCCH
3
; acetamido which is —HNOCCH
3
; and hydride which is —H, among others known in the art. B is R
2
with methyl being preferred.
D is a hydrocarbon group such as R
2
, vinyl, allyl, phenyl, fluoro substituted (otherwise unsubstituted or substituted) hydrocarbon and nonionic or cationic, substituted-hydrocarbon groups containing at least one oxygen or nitrogen group as well as salts of such substituted-hydrocarbon groups. Examples where D is a fluoro substituted (otherwise unsubstituted or substituted) hydrocarbon group include perfluoroalkylsulphonamide N—G—C
4
alkylene silanes. Examples of the latter substituted-hydrocarbon groups include
and —R
3
Q where Q represents a functional group, optionally with further alkyl or aryl chains, such as alcohols and ethers such as —(OCH
2
CH
2
)
z
OR
1
where z has a value of from 0 to about 50, esters or amides such as —COOR
6
, —CONHR
6
, —HNOCR
6
or —OOCCH(R
6
)
3
H
1-3
CHCH
2
where R
6
is an alkyl group of 1 to 18 carbon atoms such as methyl, ethyl, butyl, octyl and octadecyl with methyl being preferred and s is 0 or 1, glycidoxy such as —OCH
2
CHOCH
2
as well as other nonionic or cationic substituted-hydrocarbon groups known in the art. In the above formulas, x has a value of 0, 1 or 2 with values of 0 or 1 being preferred, and with x having a value of 0 being most preferred; y has a value of 0, 1 or 2; R
3
is a divalent saturated hydrocarbon group of from 1 to 12 carbon atoms such as R
2A
, —(CH
2
)
6
—, —(CH
2
)
8
—, and —(CH
2
)
12
—; R
4
and R
5
are each selected from the group consisting of alkyl groups of 1 to 18 carbon atoms, —CH
2
C
6
H
5
, —CH
2
CH
2
OH and —CH
2
OH. R
6
is an alkyl group of 1 to 18 carbon atoms. One example of —R
3
Q is glycidoxypropyl or —(CH
2
)
3
OCH
2
CHOCH
2
. X is an anion and more preferably, is selected from chloride, bromide, fluoride, iodide, acetate, methosulfate, ethosulfate, phosphate or tosylate anions and most preferably, X is a chloride anion.
In Formula II above, R
4
and R
5
are preferably alkyl groups of from 1 to 18 carbon atoms and more preferably, R
2
is a methyl group with the total number of carbon atoms in R
3
, R
4
and R
5
being at least 12 if antimicrobial properties are desired from the organosilane. In one preferred organosilane of Formula II, R
3
is a propylene, R
2
and R
4
are each methyl groups and R
5
is an octadecyl group while in another alternative preferred organosilane of Formula II, R
2
is a methyl group and R
4
and R
5
are each decyl groups.
The most preferred compounds for use in the present invention are (CH
3
O)
3
SiR
2
, particularly where R
2
is methyl, (CH
3
O)
3
SiCH═CH
2
, (CH
3
)
3
SiCH
2
CH═CH
2
, (CH
3
O)
3
SiCH
2
CH
2
CH
2
OCH
2
CHOCH
2
, (CH
3
O)
3
SiR
2
N(R
4
)
y
H
2−y
, (CH
3
O)
3
SiR
3
N
(+)
(R
4
)
y
H
3−y
X
(−)
, (CH
3
O)
3
SiR
3
NHR
3
N(R
4
)
y
H
2−y
, (CH
3
O)
3
SiR
3
NHR
3
N(R
4
)
y
H
3−y
X
(−)
,
where R
3
is propylene and of the nitrogen-functional organosilanes, the most preferred are 3-(trimethoxysilyl)-propyldimethyloctadecyl ammonium chloride having the formula
(CH
3
O)
3
Si(CH
2
)
3
N
N(+)
(CH
3
)
2
C
18
H
37
Cl
(−)
and 3-(trimethoxysilyl)propylmethyldi(decyl)ammonium chloride which has the formula
(CH
3
O)
3
Si(CH
2
)
3
N(+)
CH
3
(C
10
H
21
)
2
Cl
(−)
Preferably the organosilane is present in t
Kopec Mark
Mruk Brian P.
S. C. Johnson & Son Inc.
LandOfFree
Stable aqueous silane solutions for cleaning hard surfaces does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Stable aqueous silane solutions for cleaning hard surfaces, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Stable aqueous silane solutions for cleaning hard surfaces will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2869984