Polyester process
View Patent ↗The present disclosure provides processes for the preparation of unsaturated polyesters. In embodiments, a process of the present disclosure includes reacting an organic diol with a cyclic alkylene carbonate in the presence of a first catalyst to thereby form a polyalkoxy diol, optionally adding thereto a further amount of cyclic alkylene carbonate in the presence of a second catalyst, and subsequently polycondensing the resulting mixture with a dicarboxylic acid in combination with an anhydride.
1. A toner process comprising consisting of:
reacting an organic diol selected from the group consisting of 1,2-propanediol, 1,3-propanediol, 1,3-butane diol, pentylene glycol, hexylene glycol, diphenol, neopentyl glycol, diethylene glycol, dipropylene glycol, 2,2-bis-(4-hydroxy phenyl)propane, 2,2-bis-(3-hydroxy phenyl)propane, 2,2-bis-(2-hydroxy phenyl)propane, 2,2-bis-(3-hydroxy phenyl)propane, 2,2-bis-(5-hydroxy phenyl)propane, Bisphenol-A, ethoxylated Bisphenol-A, bis-(4-hydroxy phenyl)methane, 1,1-bis-(4-hydroxy phenyl)ethane, cis-1,4-dihydroxy-cyclohexane, trans-1,4-dihydroxy-cyclohexane, cis-1,2-dihydroxy-cyclohexane, trans-1,2-dihydroxy-cyclohexane, trans-1,3-dihydroxy-cyclohexane, cis-1,3-dihydroxy-cyclohexane, and mixtures thereof, with a cyclic alkylene carbonate selected from the group consisting of ethylene carbonate, propylene carbonate, butylene carbonate, and mixtures thereof, in the presence of a first catalyst of an alkali carbonate to form a polyalkoxy diol;
contacting the polyalkoxy diol with an additional amount of cyclic alkylene carbonate in the presence of a second catalyst of an alkali alkoxide to form a mixture;
polycondensing the resulting mixture with a dicarboxylic acid and an anhydride selected from the group consisting of n dodecenylsuccinic anhydride, 2-dodecenylsuccinic anhydride, 2-undecenylsuccinic anhydride, and mixtures thereof;
recovering an unsaturated polyester;
contacting the unsaturated polyester with a colorant, a surfactant, and a wax to form small particles;
aggregating the small particles;
coalescing the small particles to form toner particles; and
recovering the toner particles.
2. The process according to claim 1 , wherein the diol is utilized in an amount of from about 0.90 mole equivalents to about 1.1 mole equivalents, based on about 1 mole equivalent of dicarboxylic acid utilized, and wherein the cyclic alkylene carbonate is utilized in an amount of from about 1.90 mole equivalents to about 2.45 mole equivalents, based on about 1 mole equivalent of organic diol utilized.
3. The process according to claim 1 , wherein the dicarboxylic acid is selected from the group consisting of fumaric acid, malonic acid, itaconic acid, 2-methylitaconic acid, maleic acid, trimellitic acid, adipic acid, succinic acid, suberic acid, 2-ethyl succinic acid, glutaric acid, dodecylsuccinic acid, 2-methyladipic acid, pimelic acid, azelaic acid, sebacic acid, terephthalic acid, isophthalic acid, phthalic acid, 1,2-cyclohexanedioic acid, 1,3-cyclohexanedioic acid, and 1,4-cyclohexanedioic acid.
4. The process according to claim 1 , wherein said reacting is accomplished by heating at a temperature of from about 160° C. to about 215° C., and wherein said polycondensing is accomplished by heating at a temperature of from about 185° C. to about 225° C. for a duration of from about 1 hour to about 5 hours, followed by reducing pressure of the mixture from about 760 Torr to about 1 Torr over a period of from about 1 hour to about 6 hours.
5. The process according to claim 1 , wherein the unsaturated polyester resin is selected from the group consisting of poly(propoxylated bisphenol co-fumarate), poly(ethoxylated bisphenol co-fumarate), poly(butyloxylated bisphenol co-fumarate), poly(co-propoxylated bisphenol co ethoxylated bisphenol co-fumarate), poly(1,2-propylene fumarate), poly(propoxylated bisphenol co-maleate), poly(ethoxylated bisphenol co-maleate), poly(butyloxylated bisphenol co-maleate), poly(co-propoxylated bisphenol co ethoxylated bisphenol co-maleate), poly(1,2-propylene maleate), poly(propoxylated bisphenol co-itaconate), poly(ethoxylated bisphenol co-itaconate), poly(butyloxylated bisphenol co-itaconate), poly(co-propoxylated bisphenol co ethoxylated bisphenol co-itaconate), poly(1,2-propylene itaconate), and combinations thereof.
6. A process for the preparation of toner compositions consisting of:
reacting an organic diol selected from the group consisting of 1,2-propanediol, 1,3-propanediol, 1,3-butane diol, pentylene glycol, hexylene glycol, diphenol, neopentyl glycol, diethylene glycol, dipropylene glycol, 2,2-bis-(4-hydroxy phenyl)propane, 2,2-bis-(3-hydroxy phenyl)propane, 2,2-bis-(2-hydroxy phenyl)propane, 2,2-bis-(3-hydroxy phenyl)propane, 2,2-bis-(5-hydroxy phenyl)propane, Bisphenol-A, ethoxylated Bisphenol-A, bis-(4-hydroxy phenyl)methane, 1,1-bis-(4-hydroxy phenyl)ethane, cis-1,4-dihydroxy-cyclohexane, trans-1,4-dihydroxy-cyclohexane, cis-1,2-dihydroxy-cyclohexane, trans-1,2-dihydroxy-cyclohexane, trans-1,3-dihydroxy-cyclohexane, and cis-1,3-dihydroxy-cyclohexane, with a cyclic alkylene carbonate selected from the group consisting of ethylene carbonate, propylene carbonate, and butylene carbonate in the presence of a first catalyst of an alkali carbonate to form a polyalkoxy diol;
contacting the polyalkoxy diol with an additional amount of cyclic alkylene carbonate in the presence of a second catalyst of an alkali alkoxide to form a mixture;
polycondensing the resulting mixture with a dicarboxylic acid and an anhydride selected from the group consisting of n-dodecenylsuccinic anhydride, 2-dodecenylsuccinic anhydride, and 2-undecenylsuccinic anhydride;
subsequently recovering an amorphous polyester;
adding to said amorphous polyester a crystalline polyester, and wherein there is formed a core of said amorphous polyester and said crystalline polyester;
forming shell on said core, and which shell consists of an amorphous polyester present in an amount of from about 10 to about 32 weight percent of said generated toner composition;
contacting said core shell with a colorant, a surfactant, and a wax;
aggregating the resulting particles; and
coalescing the particles to form a toner composition.
7. A process in accordance with claim 6 wherein said anhydride is 2-dodecenylsuccinic anhydride.
8. A process in accordance with claim 6 wherein said amorphous polyester shell is present in an amount of from about 24 to about 30 weight percent, said anhydride is 2-dodecenylsuccinic anhydride, and said organic diol is Bisphenol-A.