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US 2010/0304287 A1Published application
Polyester synthesis
AssigneeXerox Corporation
InventorsJordan H. Wosnick, Karen Ann Moffat
Life of this patent
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Abstract
The present disclosure provides processes for the production of block copolymer polyester resins suitable for use in manufacturing toners. In embodiments, the copolymers include both a crystalline block and an amorphous block, which can self-assemble to form nanoparticles suitable for use in forming toners.
Claims20
A process comprising:
- contacting a first component with a catalyst, optionally in solution;
- polymerizing the first component to form a first block of a copolyester resin;
- contacting the first block, optionally in solution, with a second component;
- polymerizing the second component to form a second block of the copolyester resin linked to the first block;
- and
- recovering the copolyester resin comprising a crystalline block and an amorphous block.
3 more elements
A process comprising:
- contacting at least one precursor of an amorphous block comprising a lactone selected from the group consisting of 4-tert-butylcaprolactone, 4-phenylcaprolactone, 4-methylcaprolactone, 3,5-dimethylcaprolactone, 3-isochromanone, 4-(sulfonatophenyl)caprolactone, lactide, glycolide, cyclic anhydrides, cyclic carbonates, epoxides, and combinations thereof, with a catalyst, optionally in solution;
- polymerizing the at least one precursor of the amorphous block to form an amorphous block;
- contacting the amorphous block with at least one precursor of a crystalline block comprising a lactone selected from the group consisting of caprolactone, 1,4-dioxan-2-one, valerolactone and combinations thereof, optionally with a catalyst, optionally in solution;
- polymerizing the at least one precursor of the crystalline block to form a crystalline block linked to the amorphous block;
- and
- recovering a copolyester resin comprising the amorphous block and the crystalline block.
3 more elements
A composition comprising:
- a copolyester resin comprising core-shell particles comprising a crystalline block obtained from the polymerization of a lactone selected from the group consisting of caprolactone, 1,4-dioxan-2-one, valerolactone, and combinations thereof as the core, in combination with an amorphous block obtained from the polymerization of a lactone selected from the group consisting of 4-tert-butylcaprolactone, 4-phenylcaprolactone, 4-methylcaprolactone, 3,5-dimethylcaprolactone, 3-isochromanone, lactide, glycolide, 4-(sulfonatophenyl)caprolactone, and combinations thereof as the shell;
- at least one colorant;
- and
- an optional wax, and an optional surfactant,
- wherein the crystalline block of the copolyester resin is present in an amount of from about 1 to about 90 percent by weight of the copolyester resin and possesses a melting temperature of from about 20° C. to about 200° C., and the amorphous block of the copolyester resin is present in an amount of from about 10 to about 99 percent by weight of the copolyester resin and possesses a glass transition temperature of from about 0° C. to about 200° C.
2 more elements
Dependencies are inferred from the claim text.