Patent ID: 6465568
Filing Date: 2002-10-15
Classification: C08G,Y10S

Abstract:
An emulsion polymerization process for preparing emulsions containing particles of siloxane polymer comprising:(i) forming a mixture by combining a siloxane oligomer, an anionic surfactant, no nonionic surfactant, and water; (ii) agitating the mixture without the use of high shear mixing to form droplets of oligomer prior to polymerization which have an average diameter of greater than 10 micron/10,000 nanometer; (iii) adding a siloxane polymerization catalyst, which is capable of cleaving siloxane bonds, to the oligomer mixture; and (iv) polymerizing the oligomer to form a polymer until the polymer has polymerized to the desired viscosity or molecular weight, wherein the polymerization process is performed without the use of high shear mixing.