Methods of preventing frost formation and facilitating the removal of winter precipitation relative to a windshield and compositions for use therein
View Patent ↗Disclosed is a method of preventing frost and facilitating removal of winter precipitation relative to a windshield, comprising applying to a windshield a winter precipitation barrier composition. In one embodiment, the barrier composition comprises: a solvent and a silicon containing compound, the silicon containing compound comprising at least one of a reactive silane, a polyalkylene oxide polysiloxane, or a combination of at least one of the foregoing, wherein the reactive silane is at least one of a halosilane having the formula X n SiR 4-n 1 (I); an alkoxysilane or aminosilane having the formula a compound of formula (R 6 ) 3 Si—R 7 —Si(R 8 ) 3 (III); or a combination comprising one or more of the foregoing reactive silanes. In another embodiment, the disclosed winter precipitation barrier composition comprises a reactive silane and a solvent, wherein the reactive silane is as described above.
1. A winter precipitation barrier composition consisting of, based on a total weight of the winter precipitation barrier composition:
about 55 to about 99.9 percent by weight of a monoalcohol; and
about 0.01 to about 10 percent by weight of a reactive silane,
wherein the reactive silane is selected from the group consisting of:
a halosilane having the formula (I):
X n SiR 4-n 1 (I)
wherein n is a number from 1 to 3, R l is a linear, branched or cyclic, substituted or unsubstituted C 1 -C 30 alkyl, C 2 -C 30 alkenyl, or C 6 -C 36 aryl, alkaryl, or aralkyl group, and X is F, Cl, Br, or I;
an alkoxysilane or aminosilane having the formula (II):
wherein the alkoxysilane or aminosilane comprises no Si—Si bonds; each R 2 -R 5 can be the same or different; two or three of R 2 -R 5 are of the formula OR 6 or NR 7 R 8 ; the remaining R 2 -R 5 are independently linear, branched, or cyclic, substituted or unsubstituted C 1 -C 30 alkyl, C 2 -C 30 alkenyl, or C 6 -C 36 aryl, alkaryl, or aralkyl groups that can optionally comprise heteroatoms that are not silicon; R 6 can be a linear, branched, or cyclic, substituted or unsubstituted C 1 -C 30 alkyl, C 2 -C 30 alkenyl, or C 6 -C 36 aryl, alkaryl, or aralkyl groups that can optionally comprise heteroatoms that are not silicon; and R 7 and R 8 can be the same or different and can be hydrogen or a linear, branched, or cyclic, substituted or unsubstituted C 1 -C 30 alkyl, C 2 -C 30 alkenyl, or C 6 -C 36 aryl, alkaryl, or aralkyl groups that can optionally comprise heteroatoms that are not silicon;
a compound having the formula (III):
(R 6 ) 3 Si—R 7 —Si(R 8 ) 3 (III)
wherein R 6 and R 8 are independently halogen or linear, branched or cyclic, substituted or unsubstituted, C 1 -C 30 alkoxy groups and R 7 is a linear, branched, or cyclic, substituted or unsubstituted C 1 -C 30 alkyl, C 2 -C 30 alkenyl, or C 6 -C 36 aryl, alkaryl, or aralkyl group that can optionally comprise heteroatoms that are not silicon; and
a combination thereof;
an auxiliary compound selected from the group consisting of silicone oils, fluorinated polyether diols, a combination of the foregoing auxiliary compounds, or a combination of the foregoing auxiliary compounds and glycols; and
optionally an additional component selected from the group consisting of a humectant, a pH buffering agent, a coloring agent, a dye, a pigment and combinations thereof.
2. The winter precipitation barrier composition of claim 1 , wherein the monoalcohol is selected from the group consisting of methanol, ethanol, isopropanol, and a combination thereof.
3. The winter precipitation barrier composition of claim 1 , wherein the auxiliary compound is the silicone oil, present in an amount of about 1 to about 5 percent by weight, based on the total weight of the winter precipitation barrier composition.
4. The winter precipitation barrier composition of claim 1 , wherein the auxiliary compound is the glycol, present in an amount of about 1 to about 40 percent by weight, based on the total weight of the winter precipitation barrier composition.
5. The winter precipitation barrier composition of claim 4 , wherein the glycol is selected from the group consisting of ethylene glycol, 1,2-propylene glycol, 1,3-propylene glycol, 1,2-butylene glycol, 1,3-butylene glycol, 1,4-butylene glycol, 1,2-pentylene glycol, 1,3-pentylene glycol, 1,4-pentylene glycol, 1,5-pentylene glycol, neopentyl glycol, hexane diol, and a combination thereof.
6. The winter precipitation barrier composition of claim 4 , wherein the glycol is selected from the group consisting of ethylene glycol, 1,2-propylene glycol, 1,3-propylene glycol, and a combination thereof.
7. The winter precipitation barrier composition of claim 1 , wherein the pH is about 3 to about 8.
8. A method of preventing frost and facilitating removal of winter precipitation relative to a windshield, comprising applying the winter precipitation barrier composition of claim 1 to a windshield.
9. A method of preventing frost and facilitating removal of winter precipitation relative to a windshield, comprising applying a winter precipitation barrier composition to a windshield wherein the winter precipitation barrier composition consists of, based on a total weight of the winter precipitation barrier composition:
about 60 to about 90 percent by weight water;
about 1 to about 35 percent by weight of a glycol; and
about 0.01 to about 10 percent by weight of a reactive silane,
wherein the reactive silane is selected from the group consisting of:
a halosilane having the formula (I):
X n SiR 4-n 1 (I)
wherein n is a number from 1 to 3, R 1 is a linear, branched or cyclic, substituted or unsubstituted C 1 -C 30 alkyl, C 2 -C 30 alkenyl, or C 6 -C 36 aryl, alkaryl, or aralkyl group, and X is F, Cl, Br, or I;
an alkoxysilane or aminosilane having the formula (II):
wherein the alkoxysilane or aminosilane comprises no Si-Si bonds; each R 2 -R 5 can be the same or different; at least two of R 2 -R 5 are of the formula OR 6 or NR 7 R 8 ; the remaining R 2 -R 5 are independently linear, branched, or cyclic, substituted or unsubstituted C 1 -C 30 alkyl, C 2 -C 30 alkenyl, or C 6 -C 36 aryl, alkaryl, or aralkyl groups that can optionally comprise heteroatoms that are not silicon; R 6 can be a linear, branched, or cyclic, substituted or unsubstituted C 1 -C 30 alkyl, C 2 -C 30 alkenyl, or C 6 -C 36 aryl, alkaryl, or aralkyl groups that can optionally comprise heteroatoms that are not silicon; and R 7 and R 8 can be the same or different and can be hydrogen or a linear, branched, or cyclic, substituted or unsubstituted C 1 -C 30 alkyl, C 2 -C 30 alkenyl, or C 6 -C 36 aryl, alkaryl, or aralkyl groups that can optionally comprise heteroatoms that are not silicon;
a compound having the formula (III):
(R 6 ) 3 Si—R 7 —Si(R 8 ) 3 (III)
wherein R 6 and R 8 are independently halogen or linear, branched or cyclic, substituted or unsubstituted, C 1 -C 30 alkoxy groups and R 7 is a linear, branched, or cyclic, substituted or unsubstituted C 1 -C 30 alkyl, C 2 -C 30 alkenyl, or C 6 -C 36 aryl, alkaryl, or aralkyl group that can optionally comprise heteroatoms that are not silicon; and
a combination thereof,
an auxiliary compound selected from the group consisting of silicone oil, fluorinated polyether diol, a combination of the foregoing auxiliary compounds, and optionally an additional component selected from the group consisting of a pH buffering agent, glycerin, sorbitol, or a combination thereof.