Commercially Available Microcapsules

Most commercially available microcapsules are sized between one and several hundred micrometers (typically, microcapsules are 20-50 pm in diameter) and a concentration of 20 to 45% (by weight). 

Masterbatches of polyethylene and polypropylene containing microencapsulated thermochromic materials are already commercially available from various manufacturers. The thermochromic materials used in these microcapsules are... 

Commercially available organic microcapsules or composites represent an excellent building block for smart textiles aimed towards delivering reasonably simple medical devices that can be used to monitor patients body temperature. Although the example... 

Formation of microcapsules by in situ interfacial polymerization (where the monomers are entirely in the oil phase of the capsule core) yields microcapsules with a high core-to-wall ratio and a bilayer wall with an outer layer (about 0.05 urn) and an inner reinforcing spongy layer (0.5 fim). This method has been used to encapsulate a range of insecticides, pheromones, and herbicides, many of which have been available commercially (37). The capsule size may be varied from submicrometer to 100 /um diameter and the permeability selected for rapid or slow release of... 

Agrochomicals. The microencapsulation of pesticides, herbicides, and other pest control agents has been an active area of development. Several books or book chapters (69-72) summarize much of these efforts. Wilkins (69, pp. 314-315) and Tsuji (71) list commercial microencapsulated formulations of pest control agents available in 1990 and 1999, respectively. Most of the microcapsules in these formulations are prepared by interfacial polymerization. 

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