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AssigneeAlliedSignal Inc.
InventorsNigel P. Hacker, Todd Krajewski, Scott Lefferts, Gary Davis
Estimating the term…
Storage solutions of silsesquioxane and siloxane polymers are obtained by means of a silicon containing solvent composition. The solution has at least one polymer having a formula of [(HSiO.sub.1.5).sub.x O.sub.y ].sub.n, (HSiO.sub.1.5).sub.n, [(HSiO.sub.1.5).sub.x O.sub.y (RSiO.sub.1.5).sub.z ].sub.n, [(HSiO.sub.1.5).sub.x (RSiO.sub.1.5).sub.y ].sub.n or [(HSiO.sub.1.5).sub.x O.sub.y (RSiO.sub.1.5).sub.z ].sub.n wherein x=about 6 to about 20, y=1 to about 3, z=about 6 to about 20, n=1 to about 4,000, and each R is independently H, C.sub.1 to C.sub.8 alkyl or C.sub.6 to C.sub.12 aryl. The solvent has the formula of (CH.sub.3).sub.3 Si--O--[Si(CH.sub.3).sub.2 ].sub.a --Si(CH.sub.3).sub.3, (CH.sub.3 CH.sub.2)Si--O--[Si(CH.sub.3 CH.sub.2).sub.2 ].sub.a --SiCH.sub.3 CH.sub.2).sub.3, R.sub.3 Si--O--[SiR'.sub.2 ].sub.a --SiR.sub.3, [O--Si(CH.sub.3).sub.2 ].sub.b, [O--Si(CH.sub.3 CH.sub.2).sub.2 ].sub.b or [O--SiR'.sub.2 ].sub.n wherein a=0-5, b=3-5, and each R' is independently H or C.sub.1 to C.sub.8 alkyl.
A stable coating composition which comprises a solution of at least one polymer having a formula selected from the group consisting of [(HSiO.sub.1.5).sub.x O.sub.y ].sub.n, [(HSiO.sub.1.5).sub.x (RSiO.sub.1.5).sub.y ].sub.n and [(HSiO.sub.1.5).sub.x O.sub.y (RSiO.sub.1.5).sub.z ].sub.n wherein x=about 6 to about 20, y=1 to about 3, z=about 6 to about 20, n=1 to about 4,000, and each R is independently H, C.sub.1 to C.sub.8 alkyl or C.sub.6 to C.sub.12 aryl, and at least one solvent selected from the group consisting of (CH.sub.3).sub.3 Si--O--[Si(CH.sub.3).sub.2 ].sub.a --Si(CH.sub.3).sub.3, (CH.sub.3 CH.sub.2).sub.3 Si--O--[Si(CH.sub.3 CH.sub.2).sub.2 ].sub.a --Si--(CH.sub.3 CH.sub.2).sub.3, R.sub.3 Si--O--[SiR'.sub.2 ].sub.a --SiR.sub.3, [O--Si(CH.sub.3).sub.2 ].sub.b, and [O--Si(CH.sub.3 CH.sub.2).sub.2 ].sub.b wherein a=0-5, b=3-5, and each R' is independently H or C.sub.1 to C.sub.8 alkyl.
A method of impeding an increase in molecular weight of at least one polymer having a formula selected from the group consisting of [HSiO.sub.1.5).sub.x O.sub.y ].sub.n, [(HSiO.sub.1.5).sub.x (RSiO.sub.1.5).sub.y ].sub.n and [(HSiO.sub.1.5).sub.x O.sub.y (RSiO.sub.1.5).sub.z ].sub.n wherein x=about 6 to about 20, y=1 to about 3, z=about 6 to about 20, n=1 to about 4,000, and each R is independently H, C.sub.1 to C.sub.8 alkyl or C.sub.6 to C.sub.12 aryl, which comprises forming a solution of the polymer and at least one solvent selected from the group consisting of (CH.sub.3).sub.3 Si--O--[Si(CH.sub.3).sub.2 ].sub.a --Si(CH.sub.3).sub.3, (CH.sub.3 CH.sub.2).sub.3 Si--O--[Si(CH.sub.3 CH.sub.2).sub.2 ].sub.a --Si--(CH.sub.3 CH.sub.2).sub.3, R.sub.3 Si--O--[SiR'.sub.2 ].sub.a --SiR.sub.3, [O--Si(CH.sub.3).sub.2 ].sub.b, and [O--Si(CH.sub.3 CH.sub.2).sub.2 ].sub.b wherein a=0-5, b=3-5, and each R' is independently H or C.sub.1 to C.sub.8 alkyl.
A method of forming a layer on a substrate which comprises forming a solution of at least one polymer having a formula selected from the group consisting of [(HSiO.sub.1.5).sub.x O.sub.y ].sub.n, [(HSiO.sub.1.5).sub.x (RSiO.sub.1.5).sub.y ].sub.n and [(HSiO.sub.1.5).sub.x O.sub.y (RSiO.sub.1.5).sub.z ].sub.n wherein x=about 6 to about 20, y=1 to about 3, z=about 6 to about 20, n=1 to about 4,000, and each R is independently H, C.sub.1 to C.sub.8 alkyl or C.sub.6 to C.sub.12 aryl;
Dependencies are inferred from the claim text.