| abstract |
The invention relates to a process for the production of a capsule or microcapsule containing cellulose and / or starch. The process according to the invention is characterized in that 0-50% by weight. polymer is added to the capsule material of natural origin at a temperature of 10 to 50V ° C, the suspension is stirred vigorously, after which 0 to 50% by weight. ureaformaldehyde resin pre-condensate is mixed. The colloidal solution thus obtained is applied to a mixture of acid-preferably with 10% by weight. sulfuric acid — containing 0.1 to 50% by weight. crosslinking catalyst, suitably ammonium sulfate and further 0.01 to 5% by weight. ethoxylated amine surfactant. The capsules thus obtained are washed and dried at 40 to 100V ° C, after which the various active ingredients in the appropriate solutions are contacted with the capsule, at the end of which the capsule is dusted. |