Classifications

• • C—CHEMISTRY; METALLURGY
  • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
  • C09G—POLISHING COMPOSITIONS; SKI WAXES
  • C09G1/00—Polishing compositions
  • C09G1/06—Other polishing compositions
  • C09G1/14—Other polishing compositions based on non-waxy substances
  • C09G1/16—Other polishing compositions based on non-waxy substances on natural or synthetic resins
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K5/00—Use of organic ingredients
  • C08K5/01—Hydrocarbons

Definitions

• a method for apply- UNITED STATES PATENTS ing a protective coating to hard surfaces is also pro- 1 'd d. 2,955,047 10/l960 Terry 106/3 v1 8 3,508,933 4/1970 14 Claims, 1V0 Drawings HARD SURFACE RINSE-COATING COMPOSITION AND METHOD BACKGROUND OF THE INVENTION 1.
• Field of the Invention This invention relates to compositions of matter useful in applying a protective coating to hard surfaces from an aqueous solution.
• rinse additive compositions were developed. These compositions, which are fully described in U.S. Pat. No. 3,222,213 issued Dec. 7, I965 and U.S. Pat. No. 3,497,365 issued Feb. 24, I970 comprise solutions of mineral oil and cationic surface active agent.
• the cationic surface active agent apparently emulsifies the mineral oil in the rinse water thereby allowing a small quantity of mineral oil to be spread uniformly over the surface of the car and allowing the mineral oil to be plated out on the car surface. This coating of mineral oil renders the surface of the car hydrophobic.
• carnauba wax While thecoating obtained through the use of carnauba wax in rinse additives is more durable than that obtained with the standard rinse additive along, the coating will not last through more than one or two detergent washes. Filming of the car Windshields also occurs.
• carnauba wax is well known as a buf- -fable wax; some degree of buffing is necessary in order to impart a sheen to the surface of the car.
• the rinse-coating composition provided by this invention comprises an aqueous dispersion of the following materials: (All compositions in this specification are in weight percent unless otherwise noted):
• AFDS Amine functional polydimethylsiloxane
• NVMO Non-volatile mineral oil
• Cationic emulsifier 1.75 3.l7(
• ratio of NVMO to AFDS is from 0.20 to 0.80.
• the amine functional polydimethylsiloxane ingredient is the product of the reaction of a hydroxyl endblocked polydimethylsiloxane and a silane.
• the polydimethylsiloxane hastthe general formula I wherein X is selected from the group consisting of acetoxy, alkylamino, benzamido and butanonoxime.
• X is selected from the group consisting of acetoxy, alkylamino, benzamido and butanonoxime.
• the m is selected so that the viscosity of the polydimethylsiloxane is in the range of 10 to 15,000 cs. at C. Preferably, the viscosity is in the range of 20 to 1,000 cs.
• the silane is selected from the group consisting of compounds having the general formulas R,,"(R'O) SiRNHCH CH Nl-I wherein n has a value of from 02, R is a divalent hydrocarbon radical free of aliphatic unsaturation and containing 3-4 carbon atoms, R is an alkyl radical containing from l-4 carbon atoms, R is a monovalent hydrocarbon radical free of aliphatic unsaturation and containing from l-6 carbon atoms, and R is a hydrogen atom or a methyl radical.
• n is 0.
• R is preferably a divalent aliphatic propyl radical.
• R is preferably a methyl radical.
• R' is preferably hydrogen.
• the weight ratio of the siloxane to the silane is from about 1:1 to about 20:].
• the reaction between the siloxane and the silane is best conducted in the liquid phase by cold blending. If desired, a suitable solvent can be used.
• the exact composition of the two reactants and the exact proportions of these two reactants can be readily selected by one skilled in the art so as to produce as a final product an amine functional polydimethylsiloxane which may be used in this invention.
• One specific reaction mixture which will produce a product useful in this invention consists of a hydroxyl endblocked polydimethylsiloxane having a viscosity of about 40 es. and a silane having the formula the weight ratio of the siloxane to the silane being about 2:1.
• the reaction product is prepared by cold blending the siloxane and the silane.
• a preferred amine functional polydimethylsiloxane is available as a commercial product from the Dow Corning Company of Midland, Mich. under the designation Dow Corning EF-l3574B Emulsion and is generally described in U.S. Pat. No. 3,508,933 issued Apr. 28, 1970.
• Non-volatile mineral oils suitable for use in the present invention are the paraffinic and naphthenic mineral oils having a boiling point higher than that of kerosine. Mineral oils such as mineral seal oil and those with a boiling point of at least 300C. are preferred for use in the instant invention.
• cationic emulsifiers suitable for use in the instant invention are selected from the group of compounds known in the art as cationic surfactants.
• Cationic surfactants ionize in water to provide a positively charged cation which comprises the hydrophobic, lipophilic end of the surfactant molecule.
• Cationic surfactants specifically contemplated for use in the rinse-coating composition include the following materials:
• Specific salts include acetates, chlorides, bromides and sulfates.
• suitable compounds include dicoco dimethyl ammonium chloride, ditallow dimethyl ammonium chloride, dicoco diethyl ammonium sulfate, and n-alkyl trimethylammonium halides such as dodecyl trimethyl ammonium bromide, coconut trimethyl ammonium chloride, and tallow tri methyl ammonium chloride.
• condensation products of primary fatty amines containing from 624 carbon atoms with alkylene oxides such as ethylene oxide and propylene oxide include tallow amine reacted with 2-15 moles of ethylene oxide per mole of amine, coconut amine reacted with 2-15 moles ethylene oxide per mole of amine, and tallow diamine reacted with 30-60 moles of ethylene oxide per mole of amine.
• Preferred cationic surfactants for the instant composition include dimethyl dicoco ammonium chloride DMCC the condensation products of coconut amine with 2-5 moles of ethylene oxide per mole of amine and a mixture of these two materials in a weight ratio of DMCC to ethylene oxide condensate of about 1.5 to about 4.5.
• a highly preferred cationic emulsifier is a mixture of dimethyl dicoco ammonium chloride, tallow trimethyl chloride and the condensation product of coconut amine with 2-5 moles ethylene oxide per mole of amine wherein the weight ratios of the three materials are about l.0:0.35:0.27.
• the rinse-coating composition of the instant invention is generally provided in the form of a concentrated aqueous composition which is mixed with water in the carwash establishment before use in the rinsing operation.
• concentrations and ratios of the materials must be carefully regulated.
• the critical ranges of the materials which have been found necessary to provide a stable composition are as follows: I
• the three critical materials are added to water.
• the order of addition of the materials to the water is immaterial.
• the temperature at which the addition of the materials to water is accomplished is likewise immaterial, with ordinary room temperatures (approximately 20C.) being satisfactory.
• the concentrated rinse-coating composition is commonly and preferably used as a stock solution" in various stages of dilution such as by diluting it in cold or hot water at a ratio of about 1 part composition to about 2-10 parts water.
• 1 part composition is diluted with about 4 parts water.
• the stock solution is then added to the mixing equipment associated with that portion of an automatic carwash establishment which performs the rinsing operation on the car wherein additional dilution in the ratio of about parts water to one part stock solution occurs.
• Dilute aqueous rinse-coating compositions comprise the three critical materials in the following concentratrons:
• a preferred range for dilute aqueous rinse-coating compositions is:
• a highly preferred concentration rangev for dilute aqueous rinse-coating compositions is:
• the weight ratio of NVMO to AFDS in the dilute rinse-coating composition falls within the range of 0.20 0.80.
• the immediately above-described dilute rinsecoating compositions are sprayed on the car during the rinse operation in an automatic carwash establishment.
• the resulting coating causes beading of rinse water droplets thereby facilitating drying of the car as by contacting the car with a stream of air and provides the car with detergent resistant and rain resistant protective coating.
• the inclusion of the three essential materials in the rinse-coating composition does not foreclose the use of optional additional ingredients which do not interfere with the action of the rinse-coating composition.
• Preferred optional ingredients include water-miscible solvents such as alcohols and glycols which retard freezing of the rinse-coating composition and impart freeze-thaw stability to the composition.
• a highly preferred optional ingredient is the water-miscible solvent ethylene glycol.
• This highly preferred optional ingredient can be added to the concentrated rinse-coating composition in amounts of up to 10 percent of the total composition, preferably in amounts of 4-6 percent.
• the optional. highly preferred, water-miscible solvent ethylene glycol can be present at from 0.008 to 10 percent. Preferably, it is present at from 0008-018 percent.
• the highly preferred concentration of ethylene glycol in the dilute rinse-coating composition is 0.072-0.10 percent.
• Examples of other optional ingredients include coloring materials and perfumes.
• the use of the latter material in products which do not contain volatile mineral spirits is particularly desirable in that the perfumes provide aesthetic characteristics to the product which the customers of automatic carwash establishments find uniquely pleasing.
• the method of using this invention involves contacting the surface of a cleaned car with an aqueous rinsecoating composition which comprises:
• a preferred method of using thisinvention involves contacting the surface of a cleaned car with an aqueous rinsecoating composition which comprises:
• a highly preferred method of using this invention involves contacting the surface of a cleaned car with an aqueous rinse-coating composition which comprises:
• the weight of ratio of NVMO to AFDS in the rinse-coating composition falls within the range of 0.20-0.80.
• EXAMPLE 1 The following materials were mixed with water to give a concentrated rinse-coating composition which was stable on long-term storage and after freezing and thawing.
• the AFDS is contained in a product sold under the designation of Dow Corning EF-I3S74B Emulsion by Dow Corning Corporation. This product contains, in addition to the AFDS as hereinbefore described. a quaternary ammonium chloride which is n-alkyl trimethyl ammonium chloride.
• a dilute rinse-coating composition When mixed with cold water at a ratio of 1 part composition to 4 parts water, a dilute rinse-coating composition was obtained.
• This dilute composition when sprayed on cars during the rinsing operation at an automatic carwash establishment, imparted to the surface of the cars a protective coating which caused the rinse water to form into beads thereby facilitating the drying of the car by means of a current of air.
• the coating also gave a sheen to the surface of the treated cars.
• it was found that the coating on the cars surfaces remained effective in providing water repellency (as evidenced by the beading of water sprayed on the cars) through more than seven subsequent detergent washings in automatic carwash establishments. (During these subsequent washings no additional rinsecoating composition was applied.)
• EXAMPLE I AFDS and quaternary ammonium chloride are contained in a product sold under the designation of Dow Corning EF-l3574-B Emulsion by the Dow Corning Corporation.
• This composition is stable on storage, but, after dilution at 1 part composition to 4 parts water, fails to provide a water repellent coating on the surface of cars during the rinse operation of an automatic carwash establishment. It should be noted that the ratio of mineral oil to AFDS is outside the critical range. This example demonstrates the importance of the mineral oilzAFDS ratio.
• AFDS and quaternary ammonium chloride are contained in a product sold under the designation of Dow Corning EF- I 35748 emulsion hy the Dow Corning Corporation This composition was unstable on storage (i.e., the composition separates into more than one phase). It should be noted that the weight ratio of mineral oil- :AFDS is outside the critical range.
• the AFDS ofthisexample is the reaction product ofthe cold blending ofhydroxyl enblocked polydimelhylsiloxane having a viscosity of about 40 cs. and a silane having the formula (CH,O) Si(CH,), NHCH,CH,NH
• the weight ratio of the siloxane to the silane being about 2:l.
• Example IV is stable on long term storage and when diluted in water at a ratio of 1 part composition to about 2 to 10 parts water results in a product which is suitable for application during the rinse operation of an automatic carwash establishment.
• the diluted product imparts a protective coating to cars during rinsing so as to facilitate the drying of the rinsed cars.
• a detergent resistant protective coating on the surface of the cars is also obtained.
• the mineral seal oil is replaced with mineral oil having a boiling point of 400C.
• the major characteristics of the rinse-coating composition remain unchanged.
• Example IV the dimethyl dicoco ammonium chloride is replaced in turn with ditallow dimethyl ammonium chloride, dicoco diethyl ammonium sulfate, dodecyl trimethyl ammonium bromide, coconut trimethyl ammonium chloride, tallow trimethyl ammonium chloride, the reaction product of tallow amine and 5 moles ethylene oxide per mole of amine, the reaction product of coconut amine and 5 moles ethylene oxide per mole of amine, the reaction of tallow diamine and 45 moles of ethylene oxide per mole of diamine, l-(2aminoethyl)-2-heptadecenyl-2- imidazoline, 1-( 2-hydroxyethyl )-2-heptadecenyl-2- imidazoline, a mixture of dimethyl dicoco ammonium chloride and the reaction product of coconut amine with 2-5 moles ethylene oxide per mole of amine wherein the ratio of the dimethyl dicococo
• Example IV Each variation of the composition of Example IV as hereinbefore mentioned is stable on shelf storage and, when mixed with water in a ratio of 1 part composition to about 4 parts water, results in a highly effective dilute EXAMPLE V Mineral Seal 011 0.049% AFDS 0.1 15 DMCC 0.044 Ethomeen C-12 0.011 Ethylene Glycol 0.10 Water q.s. 100
• the AFDS ofthis example is the reaction product ofthe cold blending ofhydroxyl endblocked polydimethylsiloxane having a viscosity of about 40 es. and a silane having the formula (CH O) Si(CH MNHCH CH NH the weight ratio of the siloxane to the silane being about 2:1.
• the dilute rinse-coating composition of Example V is sprayed on a car that has gone through the detergent wash section of an automatic carwash establishment.
• the excess water on the surface of the car forms itself into beads and is easily removed from the surface of the car by a stream of air.
• the water repellent protective coating is resistant'to at least seven detergent washes in an automatic carwash establishment.
• compositions useful in automatic carwash establishments have been described in detail above in terms of compositions useful in automatic carwash establishments. While these compositions will find their greatest utility in automatic carwash establishments, it is to be understood that the compositions have utility beyond such use.
• the rinse-coating compositions can be supplied to consumers for use on household appliances such as refrigerators and washing machines, and for use on other household surfaces such as kitchen cabinets, bathroom 'walls and fixtures, and metal and plastic siding.
• the rinse-coating compositions of this invention may be used on any hard surface to which it is desirable to impart a protective coating.
• An aqueous rinse-coating composition which consisting essentially of: a. 1.452.7 percent by weight non-volatile mineral oil;
• amine functional polydimethylsiloxane which isthe reaction product of an endblocked polydimethylsiloxane having the formula I X-Si(Si-O) Si-X X CH X wherein X is selected from the group consisting of acetoxy, alklyamino, benzamido and butanonoxime, m is herein has a value of from 0 to I.
• R is saturated divalent lt)'kl1'0ktll'b0t1 radical containing.
• R is an alkyl radical containing 1 to 4 carbon atoms
• R" is a saturated monovalent hydrocarbon radical containing 1 to 6 carbon atoms
• R' is a hydrogen atom or a methyl radical, and wherein the weight ratio of said polydimethylsiloxane to said silane is from about 1:1 to about :1;
• cationic emulsifier c. 1.753.l percent by weight cationic emulsifier; wherein the weight ratio of non-volatile mineral oil to amine functional polydimethylsiloxane is from 0.20 to 0.80.
• composition of claim 1 wherein there is additionally present from 1-10 percent by weight ethylene glycol.
• composition of claim 3 wherein said nonvolatile mineral oil is mineral seal oil and said cationic emulsifier is a mixture of dimethyl dicoco ammonium chloride, tallow trimethyl ammonium chloride and the condensation product of coconut amine with 2-5 moles of ethylene oxide per mole of amine.
• composition of claim 5 wherein said dimethyl dicoco ammonium chloride, tallow trimethyl ammonium chloride and condensation product of coconut amine with 2-5 moles ethylene oxide per mole of amine are present in the weight ratios of 1:0.35:0.27.
• composition of claim 6 wherein said mineral seal oil is present at 2.1 percent by weight, said amine functional polydimethylsiloxane is present at 5.2 percent by weight, said cationic emulsifier is present at 2.4 percent by weight, and said ethylene glycol is present at 5 percent by weight.
• composition of claim 7 wherein said amine functional polydimethylsiloxane is the reaction product of a hydroxyl endblocked polydimethylsiloxane having a viscosity of about 40 c.s. and a silane having the formula Y ratio of said siloxane to said silane being about 2: l said reaction product being prepared by cold blending said siloxane and said silane.
• An aqueous rinse-coating composition which consisting essentially of:
• amine functional polydimethylsiloxane which is the reaction product of an endblockedpolydimethylsiloxane having the formula (fl-l CH3 T113 1 XSi-O-(Si-O) -Si-X l l I X CH X wherein X is selected from the group consisting of acetoxy, alklyamino, benzamido and butanonoxime, m is selected so that the viscosity of said polydimethylsiloxane is from to 15,000 cs.
• n has a value of from 0 to 2
• R is saturated divalent hydrocarbon radical containing 3 to 4 carbon atoms
• R is an alkyl radical containing 1 to 4 carbon atoms
• R" is a saturated monovalent hydrocarbon radical containing 1 to 6 carbon atoms
• R' is a hydrogen atom or a methyl radical, and wherein the weight ratio of said polydimethylsiloxane to said silane is from about 1:1 to about :1;
• cationic emulsifier c. 0.014-3.l percent by weight cationic emulsifier; wherein the weight ratio of non-volatile mineral oil to amine functional polydimethylsiloxane is from 0.20 to 0.80.
• composition of claim 9 wherein said nonvolatile mineral oil is present at from 0.0ll to 0.082 percent by weight, said amine functional polydimethylsiloxane is present at from 0.035-0.019 percent by weight and said cationic emulsifier is present at from 0.0l40.093 percent by weight.
• composition of claim 9 wherein said nonvolatile mineral oil is present at from 0026-0049 percent by weight, said amine functional polydimethylsiloxane is present -at from 0076-0115 percent by weight and said cationic emulsifier is present at from 0.032-0.056 percent by weight.
• a method for applying a protective coating to hard surfaces which comprises contacting the surfaces to be protected with an aqueous solution consisting essentially of:
• amine functional polydimethylsiloxane which is the reaction product of an endblocked polydimethylsiloxane having the formula X Si O (Si O) Si X X CH X wherein X is selected from the group consisting of acetoxy, alkylamino, benzamido and butanonoxime, m is selected so that the viscosity of said polydimethylsiloxane is from 10 to 15,000 cs.
• n has a value of from 0 to 2
• R is saturated divalent hydrocarbon radical containing 3 to 4 carbon atoms
• R is an alkyl radical containing 1 to 4 carbon atoms
• R is a saturated monovalent hydrocarbon radical containing 1 to 6 carbon atoms
• R is a hydrogen atom or a methyl radical, and wherein the weight ratio of said polydimethylsiloxane to said silane is from about 1:1 to about 20:];
• weight ratio of non-volatile mineral oil to amine functional polydimethylsiloxane is from 0.20-0.80.

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Cited By (21)

Citations (5)

• 1973
  • 1973-10-16 US US00407031A patent/US3852075A/en not_active Expired - Lifetime
• 1974
  • 1974-10-12 DE DE19742448755 patent/DE2448755A1/de active Pending
  • 1974-10-14 BE BE149503A patent/BE821037A/fr unknown
  • 1974-10-15 GB GB4460874A patent/GB1477917A/en not_active Expired

Patent Citations (5)

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