Siloxane coordination polymers
AssigneeMomentive Performance Materials Inc.
InventorsKarthikeyan SIVASUBRAMANIAN, Vivek Khare
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Abstract
A functionalized siloxane includes a ligand capable of coordinating a metal. The functionalized siloxane includes a pyridine-containing ligand attached to a siloxane polymer. The functionalized siloxanes can be employed to provide complexes including a metal that may impart a desired property to the polymer. In one embodiment, the polymer can complex lanthanide metals that are capable of phosphorescing upon exposure to UV irradiation. Such polymers can be employed to provide functional materials such as, for example, luminescent films, coatings, etc.
Claims27
A siloxane polymer of the formula:
- MDxD′yM′
- where M is R1R2R3SiO1/2, M′ is R4R5R6SiO1/2;
- D is (R7)2SiO and D′=(R8)R9SiO, x and y are independently an integer chosen from 0 to 120;
- each of R1, R2, R3, R4, and R5 is independently chosen from a hydrocarbon radical, an alkoxy radical, an aryl radical, or an alkenyloxy radical;
- R7 and R9 are independently chosen from a hydrocarbon radical, a substituted hydrocarbon radical, an unsaturated radical, an aryl radical, an alkoxy radical, or an alkenyloxy radical;
- R6 and R8 are independently chosen from a hydrocarbon radical or a monovalent radical bearing a lanthanide salt complex of a pyridine-containing ligand and having the general formula -A-LmMtn, wherein A is a spacing group having at least one spacing atom chosen from a divalent hydrocarbon optionally substituted with a heteroatom, hydrocarbonoxy group, urethane group, amide group and oxyalkylene group;
- L is a ligand comprising one or more heteroatoms and capable of complexing a metal;
- Mt is at least one metal ion or a metal salt, m is an integer from 1 to 6, and n is an integer from 0 to 6.
A process for forming a functionalized siloxane comprising:
- reacting a hydride, hydroxyl, and/or amine functional siloxane polymer with a pyridine-containing ligand via a hydrosilylation reaction, a condensation reaction, and/or a urethane/urea formation reaction to form a siloxane polymer comprising a pyridine-containing ligand attached to the siloxane polymer.
Dependencies are inferred from the claim text.