Process for preparing free-flowing ethylcellulose microcapsules

Details Process for preparing free-flowing ethylcellulose microcapsules Process for preparing free-flowing ethylcellulose microcapsules

1983-07-01

1985-09-17

Lieberman, Paul

Coating processes

Particles, flakes, or granules coated or encapsulated

Solid encapsulation process utilizing an emulsion or...

2523153, 264 41, 4272133, 4284022, 42840221, 42840224, B05D 700

Patent

active

045420424

ABSTRACT:
A process for preparing free-flowing microcapsules by taking advantage of the phase-separation of ethylcellulose in cyclohexane is disclosed. In this process, a hydrocarbon compound which is soluble in cyclohexane and have a molecular weight of 150 to 3,000 and a solubility parameter (.delta., at 25.degree. C.) of 7 to 10 (cal/cm.sup.3).sup.1/2 is used as the phase-separation-inducing agent.

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patent: 3943063 (1976-03-01), Morishita et al.
patent: 4123382 (1978-10-01), Morse et al.
patent: 4218333 (1980-08-01), Samejima et al.
patent: 4389331 (1983-06-01), Samejima et al.
Small, "Some Factors Affecting the Solubility of Polymers", J. Appl. Chem., Feb. 3, 1953, pp. 71-80.
D'Onofrio et al., "Encapsulated Microcapsules", International Journal of Pharmaceutics, 2 (1979), 91-99.

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