Carrier resins with improved RH sensitivity
View Patent ↗The instant disclosure describes methacrylate coated carrier resins with aromatic substituent groups with optionally carbon atoms replaced by heteroatoms such as S, N, and O for charge control and improved RH sensitivity.
1. A developer comprising a carrier comprising a core particle and a coating resin comprising one or more acrOate monomer units, wherein at least one monomer unit comprises a vinyl group, wherein a carbon optionally is substituted with a methyl group, said carbon is substituted with an ester group, wherein said ester group comprises an aromatic electron delocalizing group comprising a thiopyranyl group; and a toner comprising surface additive, wherein said resin comprises a highest occupied molecular orbital and said additive comprises a lowest unoccupied molecular orbital.
2. The developer of claim 1 , where said vinyl group comprises a methacrylate group.
3. The developer of claim 1 , where said resin comprises a monomer with the formula, or isomers thereof:
wherein Ar comprises the aromatic electron delocalizing group.
4. The developer of claim 1 , wherein the resin comprises a Tg of between about 80° C. to about 140° C.
5. The developer of claim 1 , wherein the at least one or more acrylate monomer units comprise a C/O ratio of at least about 3.
6. The developer of claim 1 , wherein said resin further comprises a conductive material.
7. The developer of claim 1 , wherein said resin further comprises a black colorant.
8. The developer of claim 1 , wherein the resin further comprises an amine acrylate monomer unit.
9. The developer of claim 1 , wherein said resin further comprises dimethylaminoethyl methacrylate.
10. The developer of claim 1 , wherein said resin is a copolymer further comprising a monomer selected from dimethylaminoethyl methacrylate, diethylaminoethyl methacrylate, diisopropylaminoethyl methacrylate, t-butylaminoethyl methacrylate or cyclohexyl methacrylate.
11. The developer of claim 1 , wherein the core particle is composed of iron, steel, a ferrite, a magnetite, nickel or combinations thereof.
12. The developer of claim 1 , wherein said carrier is magnetic.
13. The developer of claim 1 , wherein said toner comprises a shell.
14. The developer of claim 1 , where said toner comprises at least one polyester resin.
15. The developer of claim 1 , wherein said toner comprises an amorphous resin, a crystalline resin or both.
16. The developer of claim 1 , wherein said toner comprises an aggregation/emulsion toner.