Bleaches microencapsulation

It is sometimes possible to add properties in Hquid formulations that provide additional functions. Examples in development or in commercial use as of 1993 include microencapsulation (qv) of enzymes for protection against bleach when dispersed in a Hquid detergent addition of certain polymers to protect the enzyme after it has been added to Hquid detergents (32), or to boost activity in the final appHcation addition of surfactants or wetting agents. 

The search for chlorine bleach alternatives as well as development of technologies for stabilizing peroxide bleaches will continue. Microencapsulation technology for formulating LADDs containing chlorine bleaches has shown limited success [150,151,155,159],... 

In relation to detergent ingredients, different microencapsulation technologies are often used for fragrances and flavors. Coacervation and spray drying are mentioned in various patent applications (see example of coacervation in Ref 139 and spray drying in Ref 140). In the case of bleach active substances, microencapsulation of TAED using a polycondensation process is described in Ref 141, and a coacervation process for the encapsulation of PAP is mentioned in Ref 142. In both cases, the use in liquid applications is intended. 

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