Toner compositions with optimized beta-carboxyethyl acrylate shell latex for improved particle formation and morphology
Disclosed herein include toner compositions with toner particles having a core-shell type structure, where the core comprises a first resin comprising a styrene-acrylate copolymer and an amorphous polyester resin, and the shell comprises a second resin comprising beta-carboxyethyl acrylate (b-CEA) in an amount of from about 0.05 pph to about 2.5 pph by weight of the second resin.
1. A toner composition comprising core particles with a shell disposed over the core particles,
wherein the core particles comprises:
a first resin comprising a styrene acrylate copolymer further comprising beta-carboxyethyl acrylate (β-CEA) in an amount of from 3 pph to about 10 pph by weight of the first resin; and
an amorphous polyester resin;
and further wherein the shell comprises:
a second resin comprising a styrene acrylate copolymer comprises beta-carboxyethyl acrylate (β-CEA) in an amount of from about 1 pph to 2 pph by weight of the second resin.
2. A toner composition comprising core particles with a shell disposed over the core particles,
wherein the core particles comprise:
a first resin which comprises a styrene acrylate copolymer which comprises beta-carboxyethyl acrylate (β-CEA) in an amount of from 3 pph to about 10 pph by weight of the first resin;
an amorphous polyester resin; and
a crystalline polyester resin; and
wherein the shell comprises:
a second resin which comprises a styrene acrylate copolymer which comprises beta-carboxyethyl acrylate (β-CEA) in an amount of from about 0.5 pph to 2.5 pph by weight of the second resin.
3. The toner composition of claim 2 , wherein the toner composition comprises particles having an average circularity from about 0.93 to about 0.99.
4. The toner composition of claim 2 , wherein the crystalline resin is present in an amount of from about 5 to about 50 percent by weight of the toner composition.
5. The toner composition of claim 2 , wherein the crystalline resin is present in an amount of from about 10 to about 35 percent by weight of the toner composition.
6. The toner composition of claim 2 , wherein the crystalline resin has a melting point ranging from about 30° C. to about 120° C.
7. The toner composition of claim 2 , wherein the crystalline resin has a melting point ranging from about 50° C. to about 90° C.
8. The toner composition of claim 2 , wherein the crystalline resin has a number average molecular weight (Mn) ranging from about 1,000 to about 50,000.
9. The toner composition of claim 2 , wherein the crystalline resin has a number average molecular weight (Mn) ranging from about 2,000 to about 25,000.
10. The toner composition of claim 2 , wherein the crystalline resin has a weight average molecular weight (Mw) ranging from about 2,000 to about 100,000.
11. The toner composition of claim 2 , wherein the crystalline resin has a weight average molecular weight (Mw) ranging from about 3,000 to about 80,000.
12. The toner composition of claim 2 , wherein the crystalline resin has a molecular weight distribution (Mw/Mn) value ranging from about 2 to about 6.
13. The toner composition of claim 2 , wherein the crystalline resin has a molecular weight distribution (Mw/Mn) value ranging from about 3 to about 4.