Granted Patent B2

US 9,683,130 · App. 14/219,653 · Granted Jun 20, 2017

Inventor: Brynn Dooley (Toronto, CA)

Assignee: XEROX CORPORATION

C09D183/04Y10T428/31663

Abstract

Claims (34)

1. A coating method, comprising:

forming a liquid coating composition on a substrate; and

forming a cured coating by curing the liquid coating composition at a temperature in the range of 80° C. to about 150° C.,

wherein the liquid coating composition comprises:

a silanol terminated copolymer comprising from about 10 to about 25 mol % of a diphenylsiloxane repeat unit and greater than about 50 mol % of a dialkylsiloxane repeat unit;

at least one cross-linker; and

a catalyst comprising about 0.1 wt % to about 5 wt % of the liquid coating composition and selected from at least one in the group consisting of titanate, zirconate and tin;

wherein the silanol terminated siloxane copolymer is represented by:

where R is a linear, branched, or cyclic saturated or unsaturated alkyl group containing from about 1 to 30 carbon atoms, wherein s and t are integers and are selected such that the silanol terminated copolymer comprises from about 10 to about 25 mol % of the diphenylsiloxane repeat unit and greater than about 50 mol % of the dialkylsiloxane repeat unit, wherein s falls within the range of from about 1 to about 500 and t falls within the range of from about 1 to about 300, and

wherein the at least one crosslinker comprises tetraethoxysilane (TEOS) and one or more trialkoxysilyl terminated polymer.

2. The method of claim 1 , further comprising, polishing the cured coating to expose portions that are more hydrophilic than an upper surface of the cured coating.

3. The method of claim 1 , wherein the at least one crosslinker further comprises a trialkoxysilane terminated polydialkylsiloxane, wherein the trialkoxysilane terminated polydialkylsiloxane is represented by

wherein R is a linear, branched, or cyclic saturated or unsaturated alkyl group containing from about 1 to 30 carbon atoms, R′ is a hydrogen atom or a linear, branched, or cyclic saturated or unsaturated alkyl group containing from about 1 to 30 carbon atoms, n is from about 0 to about 50 and q is from about 1 to about 500.

4. The method of claim 1 , wherein the one or more trialkoxysilyl terminated polymer is represented by formulae I or II:

where,

L 1 , L 2 and L 3 are linker groups comprising C 1 to C 6 alkyl bridge groups; X 1 , X 2 , X 3 , X 4 , X 5 , X 6 , X 7 , X 8 and X 9 are independently selected from the group consisting of a hydroxyl, a reactive alkoxide functionality and an unreactive aliphatic functionality; and

R 1 and R 2 are independently selected from the group consisting of: a) a linear, branched or cyclic, saturated or unsaturated alkyl group, b) a perfluorinated linear, branched or cyclic carbon chain, c) a group having one or more dialkylsiloxane units, d) a substituted or unsubstituted polyether group optionally comprising one or more amide moieties, carbonyl moieties, carboxylic acid ester moieties or amine moieties, and e) a polyamine group optionally comprising a saturated hydrocarbon chain moiety.

5. The method of claim 4 , wherein the one or more trialkoxysilyl terminated polymer comprises at least one of a first trialkoxysilyl terminated polymer, a second trialkoxysilyl terminated polymer and a third trialkoxysilyl terminated polymer, wherein each of the first second and third trialkoxysilyl terminated polymers have different structures.

6. A coating method, comprising:

forming a liquid coating composition on a substrate; and

forming a cured coating by curing the liquid coating composition at a temperature in the range of 80° C. to about 150° C.,

wherein the liquid coating composition comprises:

a silanol terminated copolymer comprising from about 10 to about 25 mol % of a diphenylsiloxane repeat unit and greater than about 50 mol % of a dialkylsiloxane repeat unit;

at least one cross-linker; and

a catalyst comprising about 0.1 wt % to about 5 wt % of the liquid coating composition and selected from at least one in the group consisting of titanate, zirconate and tin;

wherein the silanol terminated siloxane copolymer is represented by:

where R is a linear, branched, or cyclic saturated or unsaturated alkyl group containing from about 1 to 30 carbon atoms, wherein s and t are integers and are selected such that the silanol terminated copolymer comprises from about 10 to about 25 mol % of the diphenylsiloxane repeat unit and greater than about 50 mol % of the dialkylsiloxane repeat unit, wherein s falls within the range of from about 1 to about 500 and t falls within the range of from about 1 to about 300,

wherein the at least one crosslinker comprises at least one selected from the group consisting of tetraethoxysilane (TEOS), a trialkoxysilane terminated polydialkylsiloxane and one or more trialkoxysilyl terminated polymer,

wherein the one or more trialkoxysilyl terminated polymer is represented by formulae I or II:

where,

L 1 , L 2 and L 3 are linker groups comprising C 1 to C 6 alkyl bridge groups; X 1 , X 2 , X 3 , X 4 , X 5 , X 6 , X 7 , X 8 and X 9 are independently selected from the group consisting of a hydroxyl, a reactive alkoxide functionality and an unreactive aliphatic functionality; and

R 1 and R 2 are independently selected from the group consisting of: a) a linear, branched or cyclic, saturated or unsaturated alkyl group, b) a perfluorinated linear, branched or cyclic carbon chain, c) a group having one or more dialkylsiloxane units, d) a substituted or unsubstituted polyether group optionally comprising one or more amide moieties, carbonyl moieties, carboxylic acid ester moieties or amine moieties, and e) a polyamine group optionally comprising a saturated hydrocarbon chain moiety, and

wherein the at least one crosslinker comprises TEOS and at least one of a first trialkoxysilyl terminated polymer, a second trialkoxysilyl terminated polymer, a third trialkoxysilyl terminated polymer, a fourth trialkoxysilyl terminated polymer, a fifth trialkoxysilyl terminated polymer, and a sixth trialkoxysilyl terminated polymer, wherein each of the first, second, third, fourth, fifth and sixth trialkoxysilyl terminated polymers have different structures.

7. The method of claim 1 , wherein the liquid coating composition further comprises at least one solvent.

Assignments (9)

Continuity (1)