Particles of thermoplastic polymer, and process of making the sa

Details Particles of thermoplastic polymer, and process of making the sa Particles of thermoplastic polymer, and process of making the sa

1977-09-23

1979-06-19

Martin, Jr., Roland E.

Compositions

Electrolytes for electrical devices

260 342, 260 78S, 96 1SD, 528491, 536 77, 536 86, 241 15, 106198, G03G 908, C08K 500, B02C 2318

Patent

active

041586344

ABSTRACT:
Finely comminuted particles of a normally solid thermoplastic organic polymer, which is particularly useful as a toner base for electrostatic reproduction utilizing pressure fusing on the toner, is prepared by dissolving a polymer in a normally solid first solvent, cooling the resulting solution to form a friable solid, and removing the first solvent from the solid, preferably by extraction with a normally liquid, relatively volatile, second solvent in which the polymer is substantially insoluble. When using the process to make magnetic mono-component toners, powered magnetic material and/or carbon black or other pigment are added to the solution of polymer and first solvent.

REFERENCES:
patent: 2130948 (1938-09-01), Caruthers
patent: 2359878 (1944-10-01), Schupp
patent: 2374126 (1945-04-01), Peters
patent: 2504208 (1950-04-01), Locke et al.
patent: 3594342 (1971-07-01), Ratzsch
patent: 3971749 (1976-07-01), Blunt

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