Polyester toner resin compositions
View Patent ↗Provided herein are polyester toner resins that may reduce or eliminate the use of Bis A, a common polyester toner resin material that may pose environmental and/or toxicity risks. In addition, the polyester toner resins according to some embodiments of the present invention may have desirable toner resin properties, such as hot offset resistance.
1. A toner composition comprising
a polyester toner resin formed from the reaction of monomers comprising
40 to 65 weight percent of an aromatic polycarboxylic acid;
0 to 15 weight percent of an unsaturated aliphatic polycarboxylic acid;
6 to 50 weight percent of at least one of an aliphatic diol and a glycidyl ester of an alkanoic acid;
2 to 5 weight percent of a branching agent; and
1 to 5 weight percent of an epoxy comprising a glycidyl methacrylate/styrene copolymer or glycidyl methacrylate/acrylic acid copolymer; and
a charge control agent.
2. The toner composition of claim 1 ,
wherein the aliphatic diol comprises at least one of ethylene glycol and propylene glycol.
3. The toner composition of claim 1 ,
wherein the glycidyl ester of an alkanoic acid is a glycidyl ester of neodecanoic acid.
4. The toner composition of claim 1 ,
wherein the branching agent comprises at least one of trimethylol propane and trimellitic anhydride.
5. The toner composition of claim 1 , wherein the epoxy comprises a glycidyl methacrylate/styrene copolyiner.
6. The toner composition of claim 1 ,
wherein the aromatic polycarboxylic acid is terephthalic acid.
7. The toner composition of claim 1 ,
wherein the unsaturated aliphatic polycarboxylic acid is fumaric acid.
8. The toner composition of claim 1 , further comprising one or more of the additives selected from the group consisting of paraffins, rheology modifying agents, inhibitors, lubricants, colorants, carrier materials and shrink-reducing additives.
9. A toner composition comprising
a polyester toner resin formed from the reaction of monomers comprising
0 to 25 weight percent of alkoxylated bisphenol A;
8 to 40 weight percent of an aliphatic diol;
5 to 30 weight percent of an unsaturated aliphatic polycarboxylic acid;
10 to 50 weight percent of an aromatic polycarboxylic acid;
2 to 5 weight percent of a branching agent; and
1 to 5 weight percent of an epoxy comprising a glycidyl methacrylate/styrene copolymer or a glycidyl methacrylate/acrylic acid copolymer; and
a charge control agent.
10. The toner composition of claim 9 , wherein the aliphatic diol comprises at least one of ethylene glycol and propylene glycol.
11. The toner composition of claim 9 , wherein the epoxy comprises a glycidyl methacrylate/styrene copolymer.
12. The toner composition of claim 9 , wherein the branching agent comprises at least one of an aliphatic triol and trimellitic anhydride.
13. The toner composition of claim 9 , wherein the aliphatic triol is trimethylol propane.
14. The toner composition of claim 9 , wherein the aromatic polycarboxylic acid comprises at least one of terephthalic acid and isophthalic acid.
15. The toner composition of claim 9 , wherein the unsaturated aliphatic polycarboxylic acid is fumaric acid.
16. The toner composition of claim 9 , further comprising one or more of the additives selected from the group consisting of paraffins, rheology modifying agents, inhibitors, lubricants, colorants, carrier materials and shrink-reducing additives.