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US 6,635,188 B1Granted
Windshield washer and deicer
AssigneesBoard of Trustees of Michigan State University, Applied CarboChemicals
InventorsKris A. Berglund, Dilum D. Dunuwila, Hasan Alizadeh
Life of this patent
Estimating the term…
Abstract
Deicing and anti-icing compositions comprising a succinate salt and at least one freezing point depressant selected from the group consisting of monohydric alcohols, polyhydric alcohols, monomethyl or monoethyl ethers of polyhydric alcohols, and mixtures thereof. The compositions have enhanced ice-melting capacity compared to the ice-melting capacity of the succinate salt or the alcohol alone, particularly at temperatures below about −10° C. The compositions are particularly useful as a windshield deicer/washer. Particular embodiments of the compositions are environmentally friendly.
Claims54
A composition which comprises in admixture:
- (a) a succinate salt selected from the group consisting of potassium, ammonium, and sodium succinate salts in an amount which acts to remove ice from a surface;
- (b) an organic surfactant which enables spreading of the composition on a glass surface;
- and
- (c) at least one freezing point depressant selected from the group consisting of monohydric alcohols having 1 to 6 carbon atoms, polyhydric alcohols having 3 to 12 carbon atoms, monomethyl or monoethyl ethers of polyhydric alcohols having 3 to 12 carbon atoms, and mixtures thereof, wherein the admixture when mixed with water melts the ice more rapidly than either the succinate salt or the freezing point depressant alone.
1 more element
A method for deicing or anti-icing a surface which comprises applying a composition which comprises:
- (a) an alkali metal succinate salt in an amount which acts to remove ice from a surface;
- and
- (b) at least one freezing point depressant selected from the group consisting of monohydric alcohols having 1 to 6 carbon atoms, polyhydric alcohols having 3 to 12 carbon atoms, monomethyl or monoethyl ethers of polyhydric alcohols having 3 to 12 carbon atoms, and mixtures thereof, wherein the composition melts ice formed on the surface more rapidly than either the succinate salt or the freezing point depressant alone.
A composition packaged for use as a windshield wiper fluid which comprises in admixture:
- (a) a succinate salt selected from the group consisting of Potassium succinate, ammonium, and sodium succinate salts in an amount which acts to remove ice from a surface;
- (b) an organic surfactant which enables spreading of the composition on a glass surface;
- and
- (c) at least one freezing point depressant selected from the group consisting of monohydric alcohols having 1 to 6 carbon atoms, polyhydric alcohols having 3 to 12 carbon atoms, monomethyl or monoethyl ethers of polyhydric alcohols having 3 to 12 carbon atoms, and mixtures thereof, wherein the composition melts ice.
1 more element
A composition which comprises in admixture:
- (a) a succinate salt in an amount which acts to remove ice from a surface;
- and
- (b) at least one freezing point depressant selected from the group consisting of monohydric alcohols having 1 to 6 carbon atoms, polyhydric alcohols having 3 to 12 carbon atoms, monomethyl or monoethyl ethers of polyhydric alcohols having 3 to 12 carbon atoms, and mixtures thereof, wherein the ratio of the succinate salt to the freezing point depressant in the admixture is about 1 to 1, and wherein the admixture when mixed with water melts the ice more rapidly than either the succinate salt or the freezing point depressant alone.
A composition which comprises in admixture:
- (a) a succinate salt in an amount which acts to remove ice from a surface;
- (b) at least one freezing point depressant selected from the group consisting of monohydric alcohols having 1 to 6 carbon atoms, polyhydric alcohols having 3 to 12 carbon atoms, monomethyl or monoethyl ethers of polyhydric alcohols having 3 to 12 carbon atoms, and mixtures thereof;
- and
- (c) water, wherein the succinate salt and the freezing point depressant comprise 20 to 30 wt % solids with the water as the balance, and wherein the admixture when mixed with the water melts the ice more rapidly than either the succinate salt or the freezing point depressant alone.
1 more element
A composition which comprises in admixture:
- (a) a succinate salt in an amount which acts to remove ice from a surface;
- (b) and an organic surfactant which enables spreading of the composition on a glass surface;
- (c) a coloring agent;
- and
- (d) at least one freezing point depressant selected from the group consisting of monohydric alcohols having 1 to 6 carbon atoms, polyhydric alcohols having 3 to 12 carbon atoms, monomethyl or monoethyl ethers of polyhydric alcohols having 3 to 12 carbon atoms, and mixtures thereof, wherein the admixture when mixed with water melts the ice more rapidly than either the succinate salt or the freezing point depressant alone.
2 more elements
A composition which comprises in admixture:
- (a) a succinate salt other than magnesium succinate in an amount which acts to remove ice from a surface;
- (b) at least one corrosion inhibitor selected from the group consisting of an alkali metal polymer salt and magnesium succinate, an alkali metal polyaspartate and magnesium succinate, an alkali metal polysuccinimide, an alkali metal polyaspartate, and an alkali metal polymaleimide salt and magnesium succinate;
- and
- (c) at least one freezing point depressant selected from the group consisting of monohydric alcohols having 1 to 6 carbon atoms, polyhydric alcohols having 3 to 12 carbon atoms, monomethyl or monoethyl ethers of polyhydric alcohols having 3 to 12 carbon atoms, and mixtures thereof, wherein the admixture when mixed with water melts the ice more rapidly than either the succinate salt or the freezing point depressant alone.
1 more element
A composition packaged for use as a windshield wiper fluid which comprises in admixture:
- (a) a succinate salt in an amount which acts to remove ice from a surface;
- and
- (b) at least one freezing point depressant selected from the group consisting of monohydric alcohols having 1 to 6 carbon atoms, polyhydric alcohols having 3 to 12 carbon atoms, monomethyl or monoethyl ethers of polyhydric alcohols having 3 to 12 carbon atoms, and mixtures thereof, wherein the ratio of succinate salt to freezing point depressant in the admixture is about 1 to 1, and wherein the composition melts ice.
A composition packaged for use as a windshield wiper fluid which comprises in admixture:
- (a) a succinate salt in an amount which acts to remove ice from a surface;
- (b) at least one freezing point depressant selected from the group consisting of monohydric alcohols having 1 to 6 carbon atoms, polyhydric alcohols having 3 to 12 carbon atoms, monomethyl or monoethyl ethers of polyhydric alcohols having 3 to 12 carbon atoms, and mixtures thereof;
- and
- (c) water, wherein the succinate salt and the freezing point depressant comprise 20 to 30 wt % solids with the water as the balance, and wherein the composition melts ice.
1 more element
A composition packaged for use as a windshield wiper fluid which comprises in admixture:
- (a) a succinate salt in an amount which acts to remove ice from a surface;
- (b) an organic surfactant which enables spreading of the composition on a glass surface,
- (c) a coloring agent;
- and
- (d) at least one freezing point depressant selected from the group consisting of monohydric alcohols having 1 to 6 carbon atoms, polyhydric alcohols having 3 to 12 carbon atoms, monomethyl or monoethyl ethers of polyhydric alcohols having 3 to 12 carbon atoms, and mixtures thereof, wherein the composition melts ice.
2 more elements
A composition packaged for use as a windshield wiper fluid which comprises in admixture:
- (a) a succinate salt other than magnesium succinate in an amount which acts to remove ice from a surface;
- (b) at least one corrosion inhibitor selected from the group consisting of an alkali metal polymer salt and magnesium succinate, an alkali metal polyaspartate and magnesium succinate, an alkali metal polysuccinimide, an alkali metal polyaspartate, and an alkali metal polymaleimide salt and magnesium succinate;
- and
- (c) at least one freezing point depressant selected from the group consisting of monohydric alcohols having 1 to 6 carbon atoms, polyhydric alcohols having 3 to 12 carbon atoms, monomethyl or monoethyl ethers of polyhydric alcohols having 3 to 12 carbon atoms, and mixtures thereof, wherein the composition melts ice.
1 more element
A method for deicing or anti-icing a surface which comprises applying a composition which comprises:
- (a) a succinate salt other than magnesium succinate in an amount which acts to remove ice from a surface;
- and
- (b) at least one freezing point depressant selected from the group consisting of monohydric alcohols having 1 to 6 carbon atoms, polyhydric alcohols having 3 to 12 carbon atoms, monomethyl or monoethyl ethers of polyhydric alcohols having 3 to 12 carbon atoms, and mixtures thereof, wherein the composition melts ice formed on the surface more rapidly than either the succinate salt or the freezing point depressant alone.
Dependencies are inferred from the claim text.