High performance silicon-based compositions
AssigneeBurning Bush Group, LLC
InventorChris Fish
Life of this patent
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Abstract
Provided herein are silicon-based compositions, which after curing is a coating composition having strong substrate adhesion and scratch resistance. The compositions are formed from a mixture of constituents comprising: from about 20% to about 90% (w/w) of a first siloxane selected from the group consisting of silsesquioxane, methylmethoxysiloxane, and combinations thereof; and from about 10% to about 80% (w/w) of one or more silicon compounds selected from the group consisting of a second siloxane, silane, and silazane. Optionally, the compositions may comprise from about 0.1% to about 5% (w/w) alkyltitanate.
Claims21
A silicon-based composition, which after curing is a coating composition having strong substrate adhesion, scratch resistance, and solvent resistance, the composition formed from a mixture of constituents comprising:
- from about 20% to about 90% (w/w, of the total composition) of a first siloxane consisting of methylsilsesquioxane and an α, ω methoxy-terminated polydimethylsiloxane, wherein the α, ω methoxy-terminated polydimethylsiloxane is at least 10% (w/w, of the total composition);
- and
- from about 10% to about 80% (w/w, of the total composition) of one or more silicon compounds selected from the group consisting of a second siloxane, silane, and silazane.
A polymer formed from the polymerization of a mixture comprising a first siloxane consisting of methylsilsesquioxane and α, ω-methoxy-terminated polydimethylsiloxane;
- and one or more silicon compounds selected from the group consisting of a second siloxane, silane, and silazane;
- the polymer comprising:
- a siloxane ladder structure comprising a repeating unit of formula (I),
- wherein each R1 is hydrocarbyl, and wherein n is between 4 and 100.
A compound comprising formula (II),
- wherein:
- each R1 is hydrocarbyl;
- each R2 is alkyl;
- each A is selected from the group consisting of
- each R3 is selected from the group consisting of alkyl and SiH(OR4)2;
- each R4 is selected from the group consisting of methyl and ethyl;
- n is between 4 and 100;
- and
- x, y, and z are each between 1 and 100.
A method of coating a surface, which method comprises:
- (a) mixing silicon-based constituents to form a silicon-based coating composition comprising:
- from about 20% to about 90% (w/w, of the total composition) of a first siloxane consisting of methylsilsesquioxane and α, ω methoxy-terminated polydimethylsiloxane, wherein the α, ω methoxy-terminated polydimethylsiloxane is at least 10% (w/w, of the total composition);
- and
- from about 10% to about 80% (w/w, of the total composition) of one or more silicon compounds selected from the group consisting of a second siloxane, silane, and silazane;
- (b) coating the mixture onto a surface;
- and
- (c) curing the coating at a temperature from about 20° C. to about 400° C. for about 0.3 hours to about 5 hours.
Dependencies are inferred from the claim text.