Polyalkylene materials
View Patent ↗The disclosure provides, in various embodiments, a method for fractionating a polyalkylene, and the fractionated polyalkylene produced thereby. The method includes, for example, separating, from a starting polyalkylene, a first portion of a polyalkylene having a Mw less than the Mw of the starting polyalkylene. Also included are carriers, phase change inks and toners comprising the fractionated polyalkylene, such as the first portion of a polyalkylene.
1. A phase change ink comprising:
a colorant; and
a polyalkylene wax fraction obtained by extracting the polyalkylene wax fraction from a starting polyalkylene with an acyclic branched or unbranched hydrocarbons having the general formula C n H 2n+2 , in which n is the number of atoms and is from about 1 to about 30 and recovering the polyalkylene wax fraction, the polyalkylene wax fraction having a polydispersity of approaching 1 to about 1.30;
wherein the polyalkylene wax fraction has a melting characteristic of about 40° C. or less and a weight average molecular weight of from 870 to 2000.
2. The polyalkylene wax fraction according to claim 1 , wherein the first portion has a polydispersity of approaching 1 to about 1.07.
3. The polyalkylene wax fraction according to claim 1 , wherein the first portion has a polydispersity of approaching 1 to about 1.05.
4. The phase change ink according to claim 1 , wherein the polyalkylene wax fraction comprises hydrocarbon fractions of from about 0 to about 50 carbons.
5. A phase change ink comprising:
a colorant; and
a carrier comprising a first polyalkylene wax portion separated from a starting polyalkylene wax, the polyalkylene wax portion being separated from the starting polyalkylene wax by (i) combining the starting polyalkylene wax with a fluid comprising acyclic branched or unbranched hydrocarbons having the general formula C n H 2n+2 , in which n is the number of atoms and is from about 1 to about 30, (ii) dissolving the first polyalkylene wax portion in the fluid, and (iii) recovering the first polyalkylene wax portion from the fluid, wherein the first polyalkylene wax portion has a polydispersity index PDI 1 of approaching 1 to about 1.30;
wherein the first polyalkylene wax portion has a melting characteristic of about 40° C. or less and a weight average molecular weight of from 870 to 2000.
6. The phase change ink according to claim 5 , wherein n is from about 4 to about 26.
7. The phase change ink according to claim 5 , wherein the first portion is present in an amount from about 30 percent to about 65 percent by weight of the ink.
8. The phase change ink according to claim 5 , wherein n is from about 5 to about 16.
9. The phase change ink according to claim 5 , wherein mixing the starting polyalkylene wax with the fluid and dissolving the first polyalkylene wax portion are carried out a temperature of from about 60° C. to about 90° C.
10. The phase change ink according to claim 5 , wherein the mixing of the starting polyalkylene wax with the fluid and dissolving the first polyalkylene wax portion are carried at a temperature of about 70° C.