Method of encapsulating a liquid active
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United States of America Patent
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Mar 9, 2021
Grant Date -
Aug 13, 2015
app pub date -
Oct 25, 2013
filing date -
Oct 25, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
A method of encapsulation of an active comprising
- (a) dispersing an active in an aqueous medium having a pH of less than 6;(b) causing the formation on this dispersed active of a polymer shell, the formation comprising the sequential deposition of a series of polymeric layers, each layer being capable of hydrogen bonding with the preceding layer;to form an aqueous slurry of active-containing capsules;characterised in that one of the first two layers is a polycarboxylic acid and that the first two to four layers taken together exhibit an interfacial compression dilation modulus of greater than 10 mN/m.
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International Classification(s)
- C11B:PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EX....
- A61K:PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOS....
- A23L:FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT....
- B01J:CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS, CO....
- A61Q:USE OF COSMETICS OR SIMILAR TOILET PREPARATIONS
- C11D:DETERGENT COMPOSITIONS
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