PROCESS FOR PRODUCING CAPSULES CONTAINING CELLULOSE OR STARCH FOR COMPOSITIONS WITH CONTROLLED RELEASE OF ACTIVE INGREDIENT

• Main Authors: HASZNOS,PETERNE,HU, BAGI,ALBERT,HU, FARAGO,JENOE,HU, MEISZEL,LASZLO,HU, SAGI,KAROLY,HU, SIMON,KATALIN,HU, BAGI,LASZLO,HU, PERNYESZI,JOZSEF,HU, SZABO,LASZLO,HU, GESZTELYI NAGY,ADAMNE,HU, MOGYOROSY,GYOERGY,HU, MIKLOS,DEZSOE,HU
• Format: Patent
• Language: English
• Published: 28.09.1993
• Edition: 5
• Subjects: AGRICULTURE; ANIMAL HUSBANDRY; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES, AS HERBICIDES; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; FISHING; FORESTRY; HUMAN NECESSITIES; HUNTING; PERFORMING OPERATIONS; PEST REPELLANTS OR ATTRACTANTS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; PLANT GROWTH REGULATORS; PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTSTHEREOF; THEIR RELEVANT APPARATUS; TRANSPORTING; TRAPPING

The invention relates to a process for producing capsule or microcapsule containing cellulose and/or starch. The process according to the invention can be characterized in that 0-50 % by weight of polymers are added to the capsule material of natural origin at a temperature of 10 to 50 DEG C, the suspension is vigorously stirred, thereafter 0 to 50 % by weight of urea-formaldehyde resin pre-condensate are admixed, the colloidal solution thus obtained is applied onto the acid mixture - preferably with 10 % by weight of sulphur acid - containing 0.1 to 5 % by weight of cross-linking catalyst, expediently ammonium sulfate, furtheron 0.01 to 5 % by weight of ethoxylated amine surface-active material, the capsules thus obtained are washed and dried at 40 to 100 DEG C, thereafter different active ingredients respectively the solutions thereof are contacted with the capsule, at last the blotted capsule is to be powdered.