WO2008149375A1 - Improved organosilicon compounds - Google Patents

Improved organosilicon compounds Download PDF

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Publication number
WO2008149375A1
WO2008149375A1 PCT/IN2007/000301 IN2007000301W WO2008149375A1 WO 2008149375 A1 WO2008149375 A1 WO 2008149375A1 IN 2007000301 W IN2007000301 W IN 2007000301W WO 2008149375 A1 WO2008149375 A1 WO 2008149375A1
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Prior art keywords
hydroxyethoxy
radical
transesterified
organosilicon
och
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PCT/IN2007/000301
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French (fr)
Inventor
Ajay Ishwarlal Ranka
Prakash Vithaldas Mehta
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Ranka, Seema, Ajay
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Publication of WO2008149375A1 publication Critical patent/WO2008149375A1/en

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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
    • C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
    • C07F7/02—Silicon compounds
    • C07F7/08—Compounds having one or more C—Si linkages
    • C07F7/18—Compounds having one or more C—Si linkages as well as one or more C—O—Si linkages
    • C07F7/1804—Compounds having Si-O-C linkages

Definitions

  • This invention relates to organosilicon compounds and compositions thereof, wherein at east one alkoxy group has been transesterified with a diol.
  • Compositions including ransesterified organosilicon compounds exhibit improved hydrolytic stability and are suitable or imparting water repellency to various surfaces.
  • organosilicon compounds as water repellants is well known in the art.
  • the )rganosilicon compounds known and practiced in the art include ethoxy and methoxy functional groups attached to the silicon moiety. These compounds are typically supplied as a 100% concentrate or diluted in an appropriate solvent.
  • Prior organosilane compositions are sensitive to hydrolysis in presence of moisture, which undesirably leads to the generation of ethanol or ' methanol during storage, transportation and use. Accordingly, the generation of methanol or ⁇ thanol undesirably lowers the flash point of these products and inherently increases the hazards of using these, products.
  • This invention is directed to transesterified organosilicon compounds, including ionic organosilicon compounds and organo-functional silicon compounds, and aqueous-based compositions including transesterified organosilicon compounds.
  • Compounds and compositions in accordance with embodiments of the present invention are suitable for application to various inorganic, organic and cellulosic surfaces for imparting water repellency, improved wetting and surface modification.
  • silane-alkoxy groups e.g.
  • the organosilicon exhibits resistance to further hydrolysis, maintains a higher flash point and simultaneously exhibits reduced intermolecular condensation when mixed with water.
  • the first alkoxy group which gets transesterified with a diol is the least sterically hindered group which then has an enveloping or shielding effect on the other two alkoxy groups.
  • This shielding effect essentially 'reduces the rate of hydrolysis of the other alkoxy groups from further hydrolysis, which ultimately leads to substantially stable alkoxy groups during storage and transportation.
  • the alkoxy groups such as methoxy and ethoxy groups are hydrolyzed and form silanol group that remain stable due to the slow hydrolyzing group, such as glycolether, substituted onto the organosilicon during the transesterification reaction.
  • the slow hydrolyzing group such as glycolether
  • a silane-alkoxy group i.e. Si-OR
  • Si-OR silane-alkoxy group
  • a transesterification reaction is an exchange reaction in which two different alkoxy groups are exchanged with each other. For example, if Si-OCH 3 is reacted with HOCH2CH2OH the methoxy group is exchanged with glycol ether resulting in the formation of Si-OCH 2 CH 2 OH by the transesterification reaction.
  • Embodiments of the present invention are produced by reacting an organosilicon compound with a diol in the presence of heat to facilitate a transesterification reaction for the replacement of one or two alkoxy groups of the organosilicon.
  • the diol can be variably supplied in excess depending on the need of the final composition.
  • Final products in accordance with various embodiments of the present invention, are suitable for imparting water repellency and for changing the surface characteristics of organic, inorganic or cellulosic surfaces.
  • transesterified organosilicons and compositions comprising transesterified compounds are especially useful as water-proofing agents, adhesion promoters and other traditionally known uses for organosilicon compounds and compositions thereof.
  • the transesterified organosilicon comprises an ionic organosilicon including compounds having a formula selected from the group consisting of:
  • Y is (OCH 2 CH 2 ), ! OH radical where n has a value of one through ten, or [OC 3 H 5 ] n OH (propylene glycol) radical where n has a value of one through ten, or [C 3 H 7 O 3 ], (glycerol) radical;
  • R is an alkyl radical including one to ten carbons;
  • R' is an alkyl radical including one to three carbons, or (OCH 2 CHa) n OH radical where n has a value of one through ten, or [OC 3 Hs] n OH (propylene glycol) radical where n has a value of one through ten, or [C 3 H 7 O 3 ] (glycerol) radical, or [O(CH 2 ) m CH 3 ] radical where m has a value of O, 1, 2 or 3, or (CH 3 OCH 2 CH 2 O) radical, or (CH 3 CH 2 OCH 2 CH 2 O) radical;
  • R" is an al
  • the transesterified organosilicon comprises an ionic organosilicon selected from the formula:
  • Y is (OCH 2 CH 2 ) n OH radical where n has a value of one through ten, or [OC 3 Hs] n OH (propylene glycol) radical where n has a value of one through ten, or [C 3 H 7 O 3 ], (glycerol) radical;
  • a has a value of zero, one or two;
  • R' is an alkyl radical including one to three carbons, or [O(CH 2 ) m CH 3 ] radical where m has value 0, 1, 2 or 3 or (CH 3 OCH 2 CH 2 O) radical, or (CH 3 CH 2 OCH 2 CH 2 O) radical;
  • R" is an alkylene group including one to four carbon atoms;
  • R'" is methyl or ethyl;
  • R"" and R v are alkyl groups containing one to twenty two wherein at least one such group is larger than eight carbon atoms and X is chloride, acetate or tosylate.
  • the transesterified organosilicon compound may be selected from the formula:
  • Y is (CH 2 CH 2 O) n OH radical where n has a value of one through ten, (CH 3 OCH 2 CH 2 O), or (CH 3 CH 2 OCH 2 CH 2 O) radical or [OC 3 H 5 ] n OH (propylene glycol) radical where n has a value of one through ten, or [C 3 H 7 O 3 ], (glycerol) radical;
  • a has a value of one or two;
  • R' is an alkyl radical including one to three carbons, or [O(CH 2 ) m CH 3 ] radical where m has value O, 1, 2 or 3, or (CH 3 OCH 2 CH 2 O) radical, or (CH 3 CH 2 OCH 2 CH 2 O) radical;
  • R'", R"" and R v are alkyl groups containing one to twenty two carbon atoms wherein at least one such group is larger than eight carbon atoms, -CH 2 C 6 H 5 , -CH 2 CH 2 OH, -CH 2
  • transesterified organosilicon compounds within the scope of the present invention include, but are not limited to the following:
  • the transesterified organosilicon compound may be selected from the formula:
  • Y is (CH 2 CH 2 O) n OH radical where n has a value of one through ten, (CH 3 OCH 2 CH 2 O), or (CH 3 CH 2 OCH 2 CH 2 O) radical or [OC 3 H 5 ] n OH (propylene glycol) radical where n has a value of one through ten, or [C 3 H 7 O 3 ], (glycerol) radical;
  • a has a value of one or two;
  • R' is an alkyl radical including one to three carbons, or [O(CH 2 ) m CH 3 ] radical where m has value O, 1, 2 or 3 or (CH 3 OCH 2 CH 2 O) radical, or (CH 3 CH 2 OCH 2 CH 2 O) radical;
  • R'", R"" and R v are alkyl groups containing one to twenty two carbon atoms wherein at least one such group is larger than eight carbon atoms, -CH 2 C 6 H 5 , -CH 2 CH 2 OH, -CH 2
  • the transesterified organosilicon comprises an organosilane including compounds selected from the formula:
  • transesterified organosilanes include, but are not limited to the following: 3-Methacryloxypropyl(2-hydroxyethoxy)dimethoxysilane; 3-Glycidoxypropyl(2-hydroxyethoxy)dimethoxysilane; 3-Methacrloxyprppyl(2-hydroxyethoxy)diethoxysilane; 3-Glycidoxypropyl(2-hydroxyethoxy)diethoxysilane; Vinyl(2-hydroxyethoxy)dimethoxysilane; Vinyl(2-hydroxyethoxy)diethoxysilane; i N-methylaminopropyl(2-hydroxyethoxy)dimethoxysilane; N-methylaminopropyl(2-hydroxyethoxy)diethoxysilane; N-N-dimethylaminopropyl(2-hydroxyethoxy)dimethoxysilane;, N-N-dimethylaminopropyl(2-hydroxyethoxy)dimethoxysilane;, N-N
  • compositions in accordance with embodiments of the present invention can be made by mixing or dissolving at least one transesterified orgaonsilicon compound in water.
  • an aqueous composition can comprise a mixture of at least one transesterified ionic organosilicon compound and at least one transesterified organofunctional silicon compound.
  • compositions in accordance with various embodiments of the present invention can include traditionally known excipients.
  • aqueous-based compositions of the present invention may optionally include a variety of known wetting agents, surfactants, buffering agents, and antimicrobial agents.
  • one embodiment of the present invention comprises a solution comprising at least one transesterified organosilicon and optionally comprising any combination of well-known excipients to further tailor the composition for a specific application.
  • the present invention comprises an aqueous-based emulsion comprising at least one transesterified organosilicon and optionally comprising any combination of well-known excipients to further tailor the composition for a specific application.
  • embodiments of the present invention may comprise an aqueous-based solution or emulsion consisting essentially of at least one transesterified organosilicon.
  • Compositions according to embodiments of the present invention can be applied to a wide variety of surfaces by any known means including for example by brush, roller, air spray, and airless spray techniques.
  • Any surface with functional groups that will bond with the silanols created by hydrolysis of the silane alkoxy groups may be rendered water repellant upon treatment with aqueous compositions of the present invention.
  • suitable surfaces for example include heavy and light weight concrete, masonry products, gypsum, concrete blocks, cinder blocks, soft mud ' bricks, sand lime bricks, drain tiles, ceramic tiles, sandstone, plaster, clay bricks, natural stones and rocks; roofing tiles, calcium silicate bricks, cement articles, slag stones and bricks, stucco, limestone, macadam, marble, grouts, mortar, terrazzo, clinker, pumice, terra, cotta, porcelain, adobe, coral, dolomite sand and aggregates.
  • Non-cement surfaces may be treated with compositions of the present invention including but not limited to perlite, cellular glass, vermiculite, mica, silica, fly ash and diatomaceous earth. After an aqueous-based composition according to embodiments of the present invention is applied and allowed to dry, a treated surface is obtained comprising a protective water resistant layer bonded to the substrate.
  • Aqueous-based compositions according to one embodiment of the present invention comprises at least about 0.1 weight percent of at least one transesterified organosilicon compound. Additionally, some embodiments may comprise from about 0.1 to about 10 weight percent of at least one transesterified organosilicon compound while others may comprise between about 5 to about 95 weight percent or about 10 and 70 weight percent. In one alternative embodiment, the aqueous-based composition comprises from about 20 to about 60 weight percent of at least one transesterified organosilicon compound or from about 30 to about 50 weight percent or of at least one transesterified organosilicon compound.
  • Example 1 Example 1:
  • Products I, II and III were diluted at a 1 : 10 ratio in water.
  • the respective solutions were applied on cement sheets, sand stones, concrete and brick.
  • Water repellency was' determined based on the observed beading effect for each solution, wherein the beading effect of each solution was assigned a value from 1 to 5.
  • a value of 1 represents a flat drop (i.e. low repellency) and a value of 5 represents an almost circular drop (i.e. high repellency).
  • Product III i.e. containing a transesterified organosilicon
  • Table-3 The results are summarized in Table-3.
  • compositions were evaluated for gloss, wherein no gloss was assigned a value of zero and a high gloss was assigned a value of five.
  • the gloss of a composition is an indication of its degree of surface penetration and intermolecular condensation.
  • a composition exhibiting reduced gloss is indicative of good substrate penetration and reduced intermolecular condensation.
  • Product III i.e. containing a transesterified org'anosilicon
  • exhibited minimum gloss thus indicating that the product has penetrated into the substrate and intermolecular condensation has been minimized.

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Abstract

Transesterified organosilicon compounds, including ionic organosilicon compounds and coupling agents, and aqueous-based compositions including transesterified organosilicon compounds are provided. Compositions comprising at least one transesterified organosilicon are suitable for application to various inorganic, organic and cullulosic surfaces for imparting water repellency and surface modifications. Compositions comprising transesterified organosilicon compounds exhibit reduced flammability, improved hydrolytic stability, reduced gloss and improved water repellency while maintaining reactivity with various substrates.

Description

IMPROVED ORGANOSILICON COMPOUNDS
This application is a continuation-in-part of copending Indian Patent Application Nos. 069/MUM/2006 and 1070/MUM/2006, respectively, both filed in India on July 7, 2006, all of vhich are hereby incorporated herein in their entirety by reference.
BACKGROUND OF THE INVENTION
This invention relates to organosilicon compounds and compositions thereof, wherein at east one alkoxy group has been transesterified with a diol. Compositions including ransesterified organosilicon compounds exhibit improved hydrolytic stability and are suitable or imparting water repellency to various surfaces.
The use of organosilicon compounds as water repellants is well known in the art. The )rganosilicon compounds known and practiced in the art include ethoxy and methoxy functional groups attached to the silicon moiety. These compounds are typically supplied as a 100% concentrate or diluted in an appropriate solvent. Prior organosilane compositions are sensitive to hydrolysis in presence of moisture, which undesirably leads to the generation of ethanol or ' methanol during storage, transportation and use. Accordingly, the generation of methanol or Ξthanol undesirably lowers the flash point of these products and inherently increases the hazards of using these, products.
Many organosilicon compositions are simply diluted in water and applied to various inorganic surfaces. It is often observed that during the hydrolysis of the silane-alkoxy groups, the resulting silanol groups produced in-situ participate in intermolecular or intramolecular condensation with the substrate. See E.P. Plueddemann, Adhesion Through Silane Coupling Agent., J. Adhe. 2, 184 (1970), E.P., Plueddemann, Silane Coupling Agents for high temperature resins, Soc, Plast. Ind. RPC Proc, 22, 9A (1967). E.P. Plueddemann, Cationic Organofunctional Silane coupling agents, Soc, Plast. Ind. RPC Proc. 27, 21B (1972). However, such intermolecular condensation needs to be avoided in order to achieve optimum performance. See Barry Arkles, Chemtech, Vol.7 (1977). Therefore, it would be desirable to have oganosilicon compositions that are non-flammable, hydrolytically stable and exhibit reduced intermolecular condensation while also being suitable for imparting water repellency and surface modification. BRIEF SUMMARY OF THE INVENTION
This invention is directed to transesterified organosilicon compounds, including ionic organosilicon compounds and organo-functional silicon compounds, and aqueous-based compositions including transesterified organosilicon compounds. Compounds and compositions in accordance with embodiments of the present invention are suitable for application to various inorganic, organic and cellulosic surfaces for imparting water repellency, improved wetting and surface modification. Surprisingly it has been found that if at least one of the silane-alkoxy groups (e.g. methoxy or ethoxy) is transesterified with a diol, such as ethylene glycol, the organosilicon exhibits resistance to further hydrolysis, maintains a higher flash point and simultaneously exhibits reduced intermolecular condensation when mixed with water. >
Although desiring not to be held to the following explanation, it is believed that the first alkoxy group which gets transesterified with a diol is the least sterically hindered group which then has an enveloping or shielding effect on the other two alkoxy groups. This shielding effect essentially 'reduces the rate of hydrolysis of the other alkoxy groups from further hydrolysis, which ultimately leads to substantially stable alkoxy groups during storage and transportation. Furthermore, it is believed that when the transesterified organosilicon compounds are mixed with water, the alkoxy groups such as methoxy and ethoxy groups are hydrolyzed and form silanol group that remain stable due to the slow hydrolyzing group, such as glycolether, substituted onto the organosilicon during the transesterification reaction. Accordingly, the presence of a glycolether group, for example, on a hydrolyzed silicon molecule significantly slows down intermolecular condensation reactions in an aqueous-based environment.
DETAILED DESCRIPTION OF THE INVENTION
The present invention now will be described more fully hereinafter, in which some, but not all embodiments of the inventions are shown. Indeed, these inventions may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will satisfy applicable legal requirements.
It is well established that in organosilane chemistry, a silane-alkoxy group (i.e. Si-OR) is known as a silane ester. Equally well known in the art of organosilane chemistry, a transesterification reaction is an exchange reaction in which two different alkoxy groups are exchanged with each other. For example, if Si-OCH3 is reacted with HOCH2CH2OH the methoxy group is exchanged with glycol ether resulting in the formation of Si-OCH2CH2OH by the transesterification reaction.
Embodiments of the present invention are produced by reacting an organosilicon compound with a diol in the presence of heat to facilitate a transesterification reaction for the replacement of one or two alkoxy groups of the organosilicon. The diol can be variably supplied in excess depending on the need of the final composition. Final products, in accordance with various embodiments of the present invention, are suitable for imparting water repellency and for changing the surface characteristics of organic, inorganic or cellulosic surfaces. For example, transesterified organosilicons and compositions comprising transesterified compounds are especially useful as water-proofing agents, adhesion promoters and other traditionally known uses for organosilicon compounds and compositions thereof.
In one embodiment of the present invention, the transesterified organosilicon comprises an ionic organosilicon including compounds having a formula selected from the group consisting of:
Figure imgf000004_0001
where in each formula: Y is (OCH2CH2),! OH radical where n has a value of one through ten, or [OC3H5]n OH (propylene glycol) radical where n has a value of one through ten, or [C3H7O3], (glycerol) radical; R is an alkyl radical including one to ten carbons; R' is an alkyl radical including one to three carbons, or (OCH2CHa)n OH radical where n has a value of one through ten, or [OC3Hs]n OH (propylene glycol) radical where n has a value of one through ten, or [C3H7O3] (glycerol) radical, or [O(CH2)mCH3] radical where m has a value of O, 1, 2 or 3, or (CH3OCH2CH2O) radical, or (CH3CH2OCH2CH2O) radical; R" is an alkyl radical including, one to three carbons, or [O(CH2)mCH3] radical where m has value O, 1, 2 or 3 or (CH3OCH2CH2O) radical, or (CH3CH2OCH2CH2O) radical; R'" is an alkyl ene group including one to four carbon atoms; R'v, Rv and Rvι are alkyl groups including one to twenty two carbon atoms wherein at least one such group is larger than eight carbon atoms, -CH2C6H5, -CH2CH2OH, -CH2OH, and - (CH2)XNHC(O)RV1 wherein x has a value of from two to ten and RV1 is a perfluoroalkyl radical having one to twelve carbon atoms; X is chloride, bromide, fluoride, iodide, acetate or tosylate; Z is a positively charged aromatic pyridinium ring of formula C5H6N+; and M is Na, K, or Li or H.
In one alternative embodiment, the transesterified organosilicon comprises an ionic organosilicon selected from the formula:
Figure imgf000005_0001
wherein Y is (OCH2CH2)n OH radical where n has a value of one through ten, or [OC3Hs]n OH (propylene glycol) radical where n has a value of one through ten, or [C3H7O3], (glycerol) radical; a has a value of zero, one or two; R' is an alkyl radical including one to three carbons, or [O(CH2)mCH3] radical where m has value 0, 1, 2 or 3 or (CH3OCH2CH2O) radical, or (CH3CH2OCH2CH2O) radical; R" is an alkylene group including one to four carbon atoms; R'" is methyl or ethyl; R"" and Rv are alkyl groups containing one to twenty two wherein at least one such group is larger than eight carbon atoms and X is chloride, acetate or tosylate.
A non-exhaustive list of specific examples of transesterified organosilicon compounds within the scope of the present invention are represented by the formulas:
(OH CH2CH2O)(OCH3)2Si(CH2)3N+(CH3)2C,8H37Cr (OH CH2CH2O)(OCH2CH3)2Si(CH2)3N+(CH3)2C18H37Cr (OH CH2CH2O)(OCH3)2Si(CH2)3N+ (CHs)2C18H37Bf (OH CH2CH2O) (OCH2CH3)2Si(CH2)3N+ (CH3)2C18H37Bf
(OH CH2CH2O)(OCH3)2Si(CH2)3N+CH3(C10H21)2Cr (OH CH2CH2O)(OCH2H3)2Si(CH2)3N+CH3(C10H2,)2Cr
(OH CH2CH2θχθCH3)2Si(CH2)3N+CH3(C10H21)2Bf (OH CH2CH2θχθCH2CH3)2Si(CH2)3N+CH3(C , 0H2 , )2Br"
(OH CH2CH2O)(OCH3)2(CH2)3N+(CH3)2CH2C6H5Cr
(OH CH2CH2O)(OCH2CH3)2Si(CH2)3N+(CH3)2CH2C6H5Cr
(OH CH2CH2O)(OCH3)2Si(CH2)3N+(CH3)2(CH2)3NHC(O)(CF2)6CF3Cr
(OH CH2CH2O)(OCH2CH3)2Si(CH2)3N+(CH3)2(CH2)3NHC(O)(CF2)6CF3Cr
In yet another alternative embodiment, the transesterified organosilicon compound may be selected from the formula:
Figure imgf000006_0001
wherein Y is (CH2CH2O)n OH radical where n has a value of one through ten, (CH3OCH2CH2O), or (CH3CH2OCH2CH2O) radical or [OC3H5]n OH (propylene glycol) radical where n has a value of one through ten, or [C3H7O3], (glycerol) radical; a has a value of one or two; R' is an alkyl radical including one to three carbons, or [O(CH2)mCH3] radical where m has value O, 1, 2 or 3, or (CH3OCH2CH2O) radical, or (CH3CH2OCH2CH2O) radical; R'", R"" and Rv are alkyl groups containing one to twenty two carbon atoms wherein at least one such group is larger than eight carbon atoms, -CH2C6H5, -CH2CH2OH, -CH2OH, and -(CH2)xNHC(0)Rvi wherein x has a value of from two to ten and RV1 is a perfluoroalkyl radical having one to twelve carbon atoms; and X is chloride, bromide, fluoride, iodide, acetate or tosylate.
Specific examples of such transesterified organosilicon compounds within the scope of the present invention include, but are not limited to the following:
(OHCH2CH2O)(OCH3)2SiCH2CH(CH3)CH2N+(CH3)2Ci8H37Cr
(OHCH2CH2O)(OCH2CH3)2SiCH2CH(CH3)CH2N+(CH3)2C18H37Cr (OHCH2CH2O)(OCHs)2SiCH2CH(CH3)CH2N+ (CH3)2Ci 8H37Bf
OHCH2CH2O)(OCH2CH3)2SiCH2CH(CH3)CH2N+ (CHs)2C I8H37Bf (OHCH2CH2O) (OCH3)ICH2CH(CH3)CH2N+CH3(C10H2O2Cr (OHCH2CH2O)(OCH2CH3)2SiCH2CH(CH3)CH2N+CH3(C10H2i)2Cr
(OHCH2CH2O)(OCH3)2SiCH2CH(CH3)CH2N+CH3(C,0H2i)2Bf
(OHCH2CH20)(OCH2CH3)2SiCH2CH(CH3)CH2N+CH3(C1oH2,)2Br-
(OHCH2CH2O)(OCH3)2SiCH2CH(CH3)CH2N+(CH3)2CH2C6H5Cr
(OHCH2CH2O)(OCH2CH3)2SiCH2CH(CH3)CH2N+(CH3)2CH2C6H5Cr
(OHCH2CH2O)(OCH3)2SiCH2CH(CH3) CH2N+(CH3)2(CH2)3NHC(O)(CF2)eCF3Cr
OHCH2CH2O)(OCH2CH3)2SiCH2CH(CH3) CH2N+(CH3)2(CH2)3NHC(O)(CF2)6CF3Cr
In another alternative embodiment, the transesterified organosilicon compound may be selected from the formula:
Figure imgf000007_0001
wherein Y is (CH2CH2O)n OH radical where n has a value of one through ten, (CH3OCH2CH2O), or (CH3CH2OCH2CH2O) radical or [OC3H5]n OH (propylene glycol) radical where n has a value of one through ten, or [C3H7O3], (glycerol) radical; a has a value of one or two; R' is an alkyl radical including one to three carbons, or [O(CH2)mCH3] radical where m has value O, 1, 2 or 3 or (CH3OCH2CH2O) radical, or (CH3CH2OCH2CH2O) radical; R'", R"" and Rv are alkyl groups containing one to twenty two carbon atoms wherein at least one such group is larger than eight carbon atoms, -CH2C6H5, -CH2CH2OH, -CH2OH, and -(CΗ2)XNHC(O)RV1 wherein x has a value of from two to ten and Rvι is a perfluoroalkyl radical having one to twelve carbon atoms; and X is chloride, bromide, fluoride, iodide, acetate or tosylate.
In another embodiment of the present invention, the transesterified organosilicon comprises an organosilane including compounds selected from the formula:
R',m /"
^SL Ji
Xm R'" where X is (OCH2CH2)n OH radical where n has a value of one through ten or [OC3H5Jn OH (propylene glycol) radical where n has a value of one through ten, or [C3H7O3], (glycerol) radical; m has value 1 or 2; R' is an alkyl group including one to three carbons or (OCH2CH2)n OH radical where n has a value of one through ten or [OC3Hs]n OH (propylene glycol) radical where n has a value of one through ten, or [C3H7O3] (glycerol) radical, or CH2=CHi radical, OCH3, OCH2CH3 or OC3H5 radical or (CH3OCH2CH2O) or (CH3CH2OCH2CH2O) radical; R" is an alkyl group including one to three carbons or (OCH2CHa)n OH radical where n has a value of one through ten or [OC3Hs]n OH (propylene glycol) radical where n has a value of one through ten, or [C3H7O3], (glycerol) radical, or CH2=CH2 radical, OCH3, OCH2CH3 or OC3H5 radical or (CH3OCH2CH2O), or (CH3CH2OCH2CH2O) radical; R'" is an alkylene group including one to four carbon atoms or perfluoroalkyl radical having one to twelve carbon atoms; Y is an organofunctional group including NH2, (CH3)NH, (CH3)2N , NH2CH2CH2NH, NH2CH2CH2NHCH2CH2NH, Cl, Br, F, I, CN, Methacryloxy, Glycidoxy, Acetoxy, H or HS.
Specific examples of transesterified organosilanes in accordance with various embodiments of the present invention include, but are not limited to the following: 3-Methacryloxypropyl(2-hydroxyethoxy)dimethoxysilane; 3-Glycidoxypropyl(2-hydroxyethoxy)dimethoxysilane; 3-Methacrloxyprppyl(2-hydroxyethoxy)diethoxysilane; 3-Glycidoxypropyl(2-hydroxyethoxy)diethoxysilane; Vinyl(2-hydroxyethoxy)dimethoxysilane; Vinyl(2-hydroxyethoxy)diethoxysilane; i N-methylaminopropyl(2-hydroxyethoxy)dimethoxysilane; N-methylaminopropyl(2-hydroxyethoxy)diethoxysilane; N-N-dimethylaminopropyl(2-hydroxyethoxy)dimethoxysilane;, N-N-dimethylaminopropyl(2-hydroxyethoxy)diethoxysilane; n-Octyl (2-hydroxyethoxy)diethoxysilane; isobutyl (2-hydroxyethoxy)dimethoxysilane; and isobutyl (2-hydroxyethoxy)diethoxysilane.
Compositions in accordance with embodiments of the present invention can be made by mixing or dissolving at least one transesterified orgaonsilicon compound in water. In one embodiment of the present invention, an aqueous composition can comprise a mixture of at least one transesterified ionic organosilicon compound and at least one transesterified organofunctional silicon compound. Furthermore, compositions in accordance with various embodiments of the present invention can include traditionally known excipients. For example, aqueous-based compositions of the present invention may optionally include a variety of known wetting agents, surfactants, buffering agents, and antimicrobial agents. As such, one embodiment of the present invention comprises a solution comprising at least one transesterified organosilicon and optionally comprising any combination of well-known excipients to further tailor the composition for a specific application. In an alternative embodiment, the present invention comprises an aqueous-based emulsion comprising at least one transesterified organosilicon and optionally comprising any combination of well-known excipients to further tailor the composition for a specific application. Additionally, embodiments of the present invention may comprise an aqueous-based solution or emulsion consisting essentially of at least one transesterified organosilicon. Compositions according to embodiments of the present invention can be applied to a wide variety of surfaces by any known means including for example by brush, roller, air spray, and airless spray techniques.
Any surface with functional groups that will bond with the silanols created by hydrolysis of the silane alkoxy groups may be rendered water repellant upon treatment with aqueous compositions of the present invention. Some suitable surfaces for example include heavy and light weight concrete, masonry products, gypsum, concrete blocks, cinder blocks, soft mud ' bricks, sand lime bricks, drain tiles, ceramic tiles, sandstone, plaster, clay bricks, natural stones and rocks; roofing tiles, calcium silicate bricks, cement articles, slag stones and bricks, stucco, limestone, macadam, marble, grouts, mortar, terrazzo, clinker, pumice, terra, cotta, porcelain, adobe, coral, dolomite sand and aggregates. Non-cement surfaces may be treated with compositions of the present invention including but not limited to perlite, cellular glass, vermiculite, mica, silica, fly ash and diatomaceous earth. After an aqueous-based composition according to embodiments of the present invention is applied and allowed to dry, a treated surface is obtained comprising a protective water resistant layer bonded to the substrate.
Aqueous-based compositions according to one embodiment of the present invention comprises at least about 0.1 weight percent of at least one transesterified organosilicon compound. Additionally, some embodiments may comprise from about 0.1 to about 10 weight percent of at least one transesterified organosilicon compound while others may comprise between about 5 to about 95 weight percent or about 10 and 70 weight percent. In one alternative embodiment, the aqueous-based composition comprises from about 20 to about 60 weight percent of at least one transesterified organosilicon compound or from about 30 to about 50 weight percent or of at least one transesterified organosilicon compound. Example 1:
3-(trimethoxysilyl)propyloctadecyldimethyl ammonium chloride in Ethylene glycol
(hereinafter "Product II").
A two liter, three-necked flask equipped with a condenser, stirrer, thermometer and a distillation head, was charged with 360 grams (six moles) of ethylene glycol. Next, 315 grams of a 70 % solution of methanol containing 3-(trimethoxysilyl)propyloctadecyl-dimethyl ammonium chloride (hereinafter "Product I") was added to the flask. The mixture was slowly heated under vacuum to 8O0C and free methanol 80 grams was distilled. The resulting composition was Product II.
Example 2:
3-[(2-hydroxyethoxy)dimethoxysilyl] propyldimethyloctadecyl ammonium chloride
(hereinafter "Product III")
The product solution (i.e. Product II) from example 1 was further heated to 12O0C under vacuum. The reaction was allowed to continue. The transesterification resulted in methanol liberation which was removed and condensed. After 16 grams of methanol (0.5 mole) was collected, vacuum was released and cooling was applied. The average structure of the components of the crude product mixture in ethylene glycol was
(OCH2CH2OH)(OCH3)2SiCH2CH2CH2N+(CH3)2(C]8H37)Cr, namely 3-[(2-hydroxyethoxy) dimethoxysilyljpropyldimethyloctadecyl ammonium chloride (i.e. Product III).
Example 3: Flash Point Evaluation
Products I, II and III were each subjected to a flash point test. The results are summarized in Table-1. Each product was then heated to 8O0C for 4 days to simulate long storage life and subjected to a second flash point determination. The results are summarized in Table-1. The data provided in Table-1 demonstrates that Product III, namely the transesterified orgaonsilicon, not only exhibited a higher flashpoint than the comparative products but also did not exhibit any reduction in flash point upon aging at 8O0C for four days. Table-1
Figure imgf000011_0001
* Flash Points measured using Pensky-Marϋn Closed-cup
Example 4: Turbidity Analysis
It is well known in the art that intermolecular condensation of water soluble orgaonisilicon compounds cause solutions thereof to become cloudy and thus exhibit an increased level of turbidity. Specifically, an increase in clouding or milkiness of an aged solution is an interpretation of the extent of inter-molecular condensation. Products I, II, and III were added to water in the proportion of 1 : 10 and maintained at a room temperature of approximately 3O0C for 7 days. The prepared aqueous solutions were monitored for an increased turbidity level. The results are summarized in Table-2. Unlike Products I and II, Product III (i.e. containing a transesterified organosilicon) exhibited a substantial improvement in shelf-life by maintaining a clear solution for around 150 hours. End-users find this property desirable for a variety of applications.
Table-2
Figure imgf000011_0002
Example 5: Water Repellency and Gloss
Products I, II and III were diluted at a 1 : 10 ratio in water. The respective solutions were applied on cement sheets, sand stones, concrete and brick. Water repellency was' determined based on the observed beading effect for each solution, wherein the beading effect of each solution was assigned a value from 1 to 5. A value of 1 represents a flat drop (i.e. low repellency) and a value of 5 represents an almost circular drop (i.e. high repellency). Product III (i.e. containing a transesterified organosilicon) exhibited the best beading effect or roll-off effect demonstrating the improved hydrophobicity or water repellency. The results are summarized in Table-3.
Table-3
Figure imgf000012_0001
* Water repellency based on the observed beading effect, wherein a value of 1 represents a flat drop and a value of 5 represents an almost circular drop.
Additionally, the compositions were evaluated for gloss, wherein no gloss was assigned a value of zero and a high gloss was assigned a value of five. The gloss of a composition is an indication of its degree of surface penetration and intermolecular condensation. In particular, a composition exhibiting reduced gloss is indicative of good substrate penetration and reduced intermolecular condensation. Unlike Products I and II, Product III (i.e. containing a transesterified org'anosilicon) exhibited minimum gloss thus indicating that the product has penetrated into the substrate and intermolecular condensation has been minimized. The results are summarized on Table-4.
Table-4
Figure imgf000012_0002
*Surface appearance Scale 0-5, 5=high gloss, 0=no gloss
Example 6: iso-butyl(2-hydroxyethoxy)diethoxysilane
A two liter, three-necked flask equipped with a condenser, stirrer, thermometer and a distillation head, was charged with 360 grams (six moles) of ethylene glycol. To this, 220 grams (1 mole) of isobutyltriethoxysilane was added. The mixture was slowly heated to 1000C and held for one hour. The temperature was raised to 12O0C and slowly vacuum was applied. The resulting transesterification reaction liberated ethanol which was removed and condensed. After approximately 46g of ethanol (1 mole) was collected, vacuum was released and cooling applied. The average structure of the components of the crude product mixture was isobutyl(2- liydroxyethoxy)diethoxysilane: (OHCH2CH2O)(CHSCH2O)2SiC4H9.
Example 7: Vinyl(2-hydroxyethoxy)dimethoxysilane (hereinafter "Product IV")
A two liter, three-necked flask equipped with a condenser, stirrer, thermometer and a distillation head, was charged with 300 grams (six moles) of ethylene glycol. To this, 150 grams (1 mole) of Vinyltrimethoxysilane was added. The mixture was slowly heated to 8O0C and held for one hour. The temperature was then raised to 12O0C and slowly vacuum was applied. The transesterification reaction liberated methanol which was removed and condensed. After approximately 3Og of methanol (1 mole) was collected, vacuum was released and cooling applied. The average structure of the components of the crude product mixture was Vinyl(2- hydroxyethoxy)dimethoxysilane: (OHCH2CH2O)(CH3O)2SiCH=CH2 (i.e. Product IV).
Example 8: Flash Point Evaluation
Product IV was subjected to flash point test. The results are summarized in the Table-5. Samples were then heated to 8O0C for 4 days to simulate long storage life and then subjected to a second flash point determination. The results are summarized in Table-5. The data provided in Table-5 demonstrates that Product IV, including a transesterified organosilicon, did not exhibit any reduction in flash point upon aging at 8O0C for four days.
Table-5
Figure imgf000013_0001
*Flash Points measured using Pensky-Martin Closed-cup
Many modifications and other embodiments of the inventions set forth herein will come to mind to one skilled in the art to which these inventions pertain having the benefit of the teachings presented in the foregoing descriptions and the associated drawings. Therefore, it is to be understood that the inventions are not to be limited to the specific embodiments disclosed and that modifications and other embodiments are intended to be included within the scope of the appended claims. Although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.

Claims

I claim:
1. A transesterified organosilicon comprising an ionic organosilicon compound selected from the group consisting of:
Figure imgf000014_0001
Figure imgf000014_0002
Figure imgf000014_0003
where in each formula:
Y is (OCH2CH2)I1 OH radical where n has a value of one through ten, or [OC3H5Jn OH (propylene glycol) radical where n has a value of one through ten, or [C3H7O3], (glycerol) radical;
R is an alkyl radical including one to ten carbons; R' is an alkyl radical including one to three carbons, or (OCH2CH2)n OH radical where n has a value of one through ten, or [OC3H5]n OH
(propylene glycol) radical where n has a value of one through ten, or [C3H7O3] (glycerol) radical, or [O(CH2)mCH3] radical where m has a value of O, 1, 2 or 3, or (CH3OCH2CH2O) radical, or
(CH3CH2OCH2CH2O) radical; R" is an alkyl radical including one to three carbons, or
[O(CH2)mCH3] radical where m has value O, 1, 2 or 3 or (CH3OCH2CH2O) radical, or (CH3CH2OCH2CH2O) radical; R'" is an alkylene group including one to four carbon atoms; R1V, Rv and RV1 are alkyl groups including one to twenty two carbon atoms wherein at least one such- group is larger than eight carbon atoms, -CH2C6H5, -CH2CH2OH, -CH2OH, and - (CH2)XNHC(O)RV1 wherein x has a value of from two to ten and RV1 is a perfluoroalkyl radical having one to twelve carbon atoms; X is chloride, bromide, fluoride, iodide, acetate or tosylate; Z is a positively charged aromatic pyridinium ring of formula C5H6N+; and M is Na, K, or Li or H.
2. A transesterified organosilicon according to Claim 1, wherein the ionic organosilicon compound is selected from the group consisting of:
(i) 3-[(2-hydroxyethoxy)dimethoxysilyl]propyldimethyloctadecyl ammonium chloride; (ii) 3~[di(2-hydroxyethoxy)methoxysilyl]propyldimethyloctadecyl ammonium chloride (iii)3-[(2-hydroxyethoxy)dimethoxysilyl]2-methylpropyldimethyloctadecyl ammonium chloride; (iv) 3-[di(2-hydroxyethoxy)methoxysilyl] 2-methylpropyldimethyloctadecyl ammonium chloride (v) 3-[(2-hydroxyethoxy)diethoxysilyl]propyldimethyloctadecyl ammonium chloride; (vi)3-[di(2-hydroxyethoxy)ethoxysilyl]propyldimethyloctadecyl ammonium chloride; (vii)3-[(2-hydroxyethoxy)diethoxysilyl]2-methylpropyldimethyloctadecyl ammonium chloride; and (viii)3-[di(2-hydroxyethoxy)ethoxysilyl]2-methylpropyldimethyloctadecyl ammonium chloride.
3. An aqueous-based composition consisting essentially of at least one ionic organosilicon compound of claim 1.
4. The aqueous-based composition of Claim 3, wherein said composition comprises only one ionic organosilicon compound.
5. The aqueous-based composition of Claim 4, wherein said ionic organosilicon compound is 3-[(2-hydroxyethoxy)dimethoxysilyl]propyldimethyloctadecyl ammonium chloride.
6. The aqueous-based composition of Claim 4, wherein said ionic organosilicon compound is 3-[di(2-hydroxyethoxy)methoxysilyl]propyldimethyloctadecyl ammonium chloride.
7. The aqueous-based composition of Claim 4, wherein said ionic organosilicon compound is 3-[(2-hydroxyethoxy)dimethoxysilyl] 2-methylpropyldimethyloctadecyl ammonium chloride.
8. The aqueous-based composition of Claim 4, wherein said ionic organosilicon compound is 3-[di(2-hydroxyethoxy)methoxysilyl] 2-methylpropyldimethyloctadecyl ammonium chloride.
9. The aqueous-based composition of Claim 4, wherein said ionic organosilicon compound is 3-[(2-hydroxyethoxy)diethoxysilyl]propyldimethyloctadecyl ammonium chloride.
10. The aqueous-based composition of Claim 4, wherein said ionic organosilicon compound is 3- [di(2-hydroxyethoxy)ethoxysilyl]propyldimethyloctadecyl ammonium chloride.
11. The aqueous-based composition of Claim 4, wherein said ionic organosilicon compound is 3-[(2-hydroxyethoxy)diethoxysilyl] 2-methylpropyldimethyloctadecyl ammonium chloride.
12. The aqueous-based composition of Claim 4, wherein said ionic organosilicon compound is 3- [di(2-hydroxyethoxy)ethox'ysilyl] 2-methylpropyldimethyloctadecyl ammonium chloride.
13. The aqueous-based composition of Claim 4, wherein said one ionic organosilicon compound comprises between about 0.1 to about 95 weight percent of said aqueous-based composition.
14. A transesterified organosilicon comprising an organosilane selected from the group consisting of:
Figure imgf000016_0001
where X is (OCH2CH2)O OH radical where n has a value of one through ten or [OC3H5]n OH
(propylene glycol) radical where n has a value of one through ten, or [C3H7O3], (glycerol) radical; m has value 1 or 2; R1 is an alkyl group including one to three carbons or (OCH2CH2),! OH radical where n has a value of one through ten or [OC3H5],, OH (propylene glycol) radical where n has a value of one through ten, or [03H7O3] (glycerol) radical, or CH2=CH2 radical, OCH3, OCH2CH3 or OC3H5 radical or (CH3OCH2CH2O) or (CH3CH2OCH2CH2O) radical; R" is an alkyl group including one to three carbons or (OCH2CHa)n OH radical where n has a value of one through ten or [OC3Hs]n OH (propylene glycol) radical where n has a value of one through ten, or [C3H7O3], (glycerol) radical, or CH2=CH2 radical, OCH3, OCH2CH3 or OC3H5 radical or (CH3OCH2CH2O), or (CH3CH2OCH2CH2O) radical; R'" is an alkylene group including one to four carbon atoms or perfluoroalkyl radical having one to twelve carbon atoms; Y is an organofunctional group including NH2, (CH3)NH, (CH3)2N , NH2CH2CH2NH, NH2CH2CH2NHCH2CH2NH, Cl, Br, F, I5 CN, Methacryloxy, Glycidoxy, Acetoxy, H or HS.
15. A transesterified organosilicon according to Claim 14, wherein said organosilane compound is 3-Methacryloxypropyl(2-hydroxyethoxy)dimethoxysilane.
16. A transesterified organosilicon according to Claim 14, wherein said organosilane compound is 3 -Methacryloxypropyl-Di(2 -hydroxy ethoxy)metboxysilane.
17. A transesterified organosilicon according to Claim 14, wherein said organosilane compound is 3-3-Glycidoxypropyl(2-hydroxyethoxy)dimethoxysilane.
18. A transesterified organosilicon according to Claim 14, wherein said organosilane compound is 3-Glycidoxypropyl-di(2-hydroxyethoxy)methoxysilane
19. A transesterified organosilicon according to Claim 14, wherein said organosilane compound is 3 -Methacryloxypropyl(2-hydroxyethoxy)diethoxysilane.
20. A transesterified organosilicon according to Claim 14, wherein said organosilane compound is 3-Methacryloxypropyl(2-hydroxyethoxy)diethoxysilane.
21. A transesterified organosilicon according to Claim 14, wherein said organosilane compound is 3-Glycidoxypropyl-di(2-hydroxyethoxy)ethoxysilane.
22. A transesterified organosilicon according to Claim 14, wherein said organosilane compound is 3-Methacryloxy-2-methylpropyl(2-hydroxyethoxy)dimethoxysilane.
23. A transesterified organosilicon according to Claim 14, wherein said organosilane compound is 3 -Methacryloxy-2-methylpropyl-Di(2-hydroxyethoxy)methoxysilane.
24. A transesterified organosilicon according to Claim 14, wherein said organosilane compound is 3-3 -Glycidoxy-2-methylpropyl(2-hydroxyethoxy)dimethoxysilane.
25. A transesterified organosilicon according to Claim 14, wherein said organosilane compound is 3 -GIy cidoxy-2-methylpropyl-di(2 -hydroxy ethoxy)methoxysilane
26. A transesterified organosilicon according to Claim 14, wherein said organosilane compound is 3-Methacryloxy-2methylpropyl(2-hydroxyethoxy)diethoxysilane.
27. A transesterified organosilicon according to Claim 14, wherein said organosilane compound is 3 -Methacryloxy-2-methylpropyl(2-hydroxyethoxy)diethoxysilane.
28. A transesterified organosilicon according to Claim 14, wherein said organosilane compound is 3-Glycidoxy-2-methylpropyl-di(2-hydroxyethoxy)ethoxysilane.
29. A transesterified organosilicon according to Claim 14, wherein said organosilane compound is Vinyl(2-hydroxyethoxy)dimethoxysilane.
30. A transesterified organosilicon according to Claim 14, wherein said organosilane compound is Vinyl-di(2-hydroxyethoxy)methoxysilane.
31. A transesterified organosilicon according to Claim 14, wherein said organosilane compound is Vinyl(2-hydroxyethoxy)diethoxysilane.
32. A transesterified organosilicon according to Claim 14, wherein said organosilane compound is Vinyl-di(2-hydroxyethoxy)ethoxysilane.
33. A transesterified organosilicon according to Claim 14, wherein said organosilane compound is N-methylaminopropyl(2-hydroxyethoxy)dimethoxysilane.
34. A transesterified organosilicon according to Claim 14, wherein said organosilane compound is N-methylaminopropyl-di(2-hydroxyethoxy)methoxysilane.
35. A transesterified organosilicon according to Claim 14, wherein said organosilane compound is N-methylaminoprdpyl(2-hydroxyethoxy)diethoxysilane.
36. A transesterified organosilicon according to Claim 14, wherein said organosilane compound is N-methylaminopropyl~di(2-hydroxyethoxy)ethoxysilane.
37. A transesterified organosilicon according to Claim 14, wherein said organosilane compound is N-N-dimethylaminopropyl(2-hydroxyethoxy)dimethoxysilane.
38. A transesterified organosilicon according to Claim 14, wherein said organosilane compound is NτN-dimethylaminopropyl(2~hydroxyethoxy)diethoxysilane.
39. A transesterified organosilicon according to Claim 14, wherein said organosilane compound is N-N-dimethylaminopropyl-di(2-hydroxyethoxy)ethoxysilane.
40. A transesterified organosilicon according to Claim 14, wherein said organosilane compound is isobutyl(2-hydroxyethoxy)diethoxysilane.
41. A transesterified organosilicon according to Claim 14, wherein said organosilane compound is isobutyl-di(2-hydroxyethoxy)ethoxysilane.
42. An aqueous-based composition comprising at least one organosilane compound of claim 14.
43. The aqueous-based composition of Claim 21, wherein said one organosilane compound is selected from the group consisting of:
3-Methacryloxypropyl(2-hydroxyethoxy)dimethoxysilane;
3-Methacryloxypropyldi-(2-hydroxyethoxy)methoxysilane;
3-Glycidoxypropyl(2-hydroxyethoxy)dimethoxysilane;
3-Glycidoxypropyl-di(2-hydroxyethoxy)methoxysilane;
3-Methacryloxypropyl(2-hydroxyethoxy)diethoxysilane;
3-Methacryloxypropyl-di(2-hydroxyethoxy)ethoxysilane;
3-Glycidoxypropyl(2-hydroxyethoxy)diethoxysilane;
3-Glycidoxypropyl-di(2-hydroxyethoxy)ethoxysilane;
N-methylaminopropyl(2-hydroxyethoxy)diethoxysilane;
N-methylaminopropyl-di(2-hydroxyethoxy) ethoxysilane;
N-N-dimethylaminopropyl(2-hydroxyethoxy)dimethoxysilane;
N-N-dimethylaminopropyl-di(2-hydroxyethoxy)methoxysilane;
N-N-dimethylaminopropyl(2-hydroxyethoxy)diethoxysilane;
N-N-dimethylaminopropyl-di(2-hydroxyethoxy)ethoxysilane;
3-Methacryloxy-2-memylpropyl(2-h}'droxyethoxy)dimethoxysilane;
3-Methacryloxy-2-methylpropyldi-(2-hydiOxyethoxy)methoxysilane;
3-Glycidoxy2-methylpropyl(2-hydroxyethoxy)dimethoxysilane;
3-Glycidoxy-2-methylpropyl-di(2-hydroxyethoxy)methoxysilane;
3-Methacryloxy-2-methylpropyl(2-hydroxyethoxy)diethoxysilane;
3-Methacryloxy-2-methylpropyl-di(2-hydroxyethoxy)ethoxysilane;
3-Glycidoxy2-methylpropyl(2-hydroxyethoxy)diethoxysilane;
3-Glycidoxy-2-methylpropyl-di(2-hydroxyethoxy)ethoxysilane;
N-methylamino-2-methylpropyl(2-hydroxyethoxy)diethoxysilane;
N-methylamino-2-methylpropyl-di(2-hydroxyethoxy) ethoxysilane;
N-N-dimethylamino-2-methylpropyl(2-hydroxyethoxy)dimethoxysilane;
N-N-dimethylamino-2-methylpropyl-di(2-hydroxyethoxy)methoxysilane; N-N-dimethylamino-2-methylpropyl(2-hydroxyethoxy)diethoxysilane;
N-N-dimethylamino-2-memylpropyl-di(2-hydroxyethoxy)ethoxysilane; n-Octyl (2-hydroxyethoxy)diethoxysilane; n~Optyl-di(2-hydroxyethoxy)eth'oxysilane; isobutyl (2-hydroxyethoxy)dimethoxysilane; isobutyl-di(2-hydroxyethoxy)methoxysilane; isobutyl (2-hydroxyethoxy)diethoxysilane,and isobutyl-di(2-hydroxyethoxy)ethoxysilane.
44. A transesterified organosilicon as claimed is herein described with foregoing description and examples.
PCT/IN2007/000301 2007-06-06 2007-07-20 Improved organosilicon compounds WO2008149375A1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4005030A (en) * 1975-04-22 1977-01-25 The Procter & Gamble Company Organosilane-containing anionic detergent composition
US4005028A (en) * 1975-04-22 1977-01-25 The Procter & Gamble Company Organosilane-containing detergent composition
US6376696B1 (en) * 1999-06-19 2002-04-23 Clariant Gmbh Antimicrobial siloxane quat formulations and their preparation and use

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4005030A (en) * 1975-04-22 1977-01-25 The Procter & Gamble Company Organosilane-containing anionic detergent composition
US4005028A (en) * 1975-04-22 1977-01-25 The Procter & Gamble Company Organosilane-containing detergent composition
US6376696B1 (en) * 1999-06-19 2002-04-23 Clariant Gmbh Antimicrobial siloxane quat formulations and their preparation and use

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