This invention relates to a composition of matter and to a method for producing a controllable, residue-free break of an emulsion or a dispersion of a water-in-oil emulsion. An emulsion breaker is incorporated into the emulsion. It is temporarily-protected (deactivated) so that breaking of the emulsion...http://www.google.com/patents/US4517102?utm_source=gb-gplus-sharePatent US4517102 - Method of breaking an emulsion and an emulsion-emulsion breaker composition
