Hyper-branched polyester for use in CPT toner and method of preparing the same
US8552141B2 · kind B2 · utility
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7Claims
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Key dates
| Filing date | Dec 3, 2009 |
| Grant date | Oct 8, 2013 |
| Priority date | — |
| Expiry date | May 16, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/08797
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A hyper-branched polyester and a method of making the same having a tri-functional monomer A3, a di-functional monomer B2 and a mono-functional monomer C1 having a monomer ratio of A3:B2:C1 from about 1:0.2:2 to about 1:1.4:0.2 for use in a chemically processed electrophotographic toner providing a lower fusing temperature. In one form, the hyper-branched polyester includes a tri-hydroxy monomer, a di-acid and its derivatives, and a mono-acid and its derivatives. In other forms, a substituted anhydride and a long chain hydrocarbon carboxylic acid and its derivatives may also be included in the di-functional monomer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.