A DEVICE FOR PRODUCING DISPERSIONS AND METHOD OF PRODUCING DISPERSIONS

• Main Authors: SKAGGS, KENNETH W, ERDEM, BEDRI, GILLIS, PAUL A
• Format: Patent
• Language: English; French
• Published: 26.06.2008
• Subjects: MIXING, e.g. DISSOLVING, EMULSIFYING, DISPERSING; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; TRANSPORTING

The instant invention is a device for producing dispersions and method of producing dispersions. The device for producing dispersions includes a firs t stator, a second stator, a shell encasing the first stator and the second stator, a rotor being disposed therebetween the first stator and the second stator thereby forming a first chamber and a second chamber, at least one fi rst inlet port into the first chamber, and at least one outlet port out of t he second chamber. The device may optionally include at least one additional second inlet port into the second chamber. The method of producing a polyur ethane dispersion includes the following steps: (1) providing a device for p roducing a dispersion including a first stator, a second stator, a shell enc asing the first stator and the second stator, a rotor being disposed therebe tween the first stator and the second stator thereby forming a first chamber and a second chamber, at least one first inlet port into the first chamber, at least one outlet port out of the second chamber; and optionally one or m ore additional second inlet ports into the second chamber; (2) introducing a prepolymer phase and an aqueous phase into the first chamber via the first inlet ports; (3) emulsifying the prepolymer phase in the aqueous phase; (4) thereby producing a prepolymer emulsion; (5) introducing a chain extender ag ent into the emulsion in the second chamber via the second inlet port; (6) c hain extending the prepolymer; and (7) thereby producing a polyurethane disp ersion.