Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – Composite article making
Patent
1988-12-16
1991-04-30
Lovering, Richard D.
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
Composite article making
42840221, 503215, B01J 1316
Patent
active
050116347
ABSTRACT:
The invention relates to a process for producing microcapsules by microencapsulating hydrophobic oils, particularly with substances contained therein, in which the hydrophobic oil is mixed, accompanied by vigorous stirring, into an aqueous medium containing a dispersion-stabilizing compound. The resulting oil-in-water dispersion is acid adjusted, aminoplastic capsules are formed in the conventional manner and the aqueous fraction of the aqueous medium is removed in the usual way. The aqueous medium contains a water-soluble, cationic compound such that it forms a dispersion-stabilizing compound in interaction with the water-soluble, anionic, sulphonated melamine-formaldehyde precondensate. The microcapsules obtained according to this process can be obtained economically without agglomerate formation in the form of dry single capsules e.g. by spray drying the aqueous capsule dispersion obtained. The invention also permits the encapsulation of random substances in dissolved and/or finely dispersed form.
REFERENCES:
patent: 3594328 (1971-07-01), Schibler et al.
patent: 3607775 (1971-09-01), Yoshida et al.
patent: 3778383 (1973-12-01), Schibler et al.
patent: 4328119 (1982-05-01), Iwasaki et al.
patent: 4396670 (1983-08-01), Sinclair
patent: 4406816 (1983-09-01), Sliwka
patent: 4824823 (1989-04-01), Pietsch et al.
patent: 4965025 (1990-10-01), Pietsch et al.
Pietsch Gunter
Schrader Karl-Heinz
Covert John M.
Lovering Richard D.
Papierfabrik August Koehler AG
LandOfFree
Microcapsules and microcapsule production process does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Microcapsules and microcapsule production process, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Microcapsules and microcapsule production process will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-639142