The preparation of elastomeric materials in the form of free flowing particles in which the latex formed by the polymerization of the monomers in aqueous medium is coagulated to produce particles of a size within the range of 0.5 to 5 millimeters and in which the particles are ultimatedly dried and then...http://www.google.com.au/patents/US4213888?utm_source=gb-gplus-sharePatent US4213888 - Particulate elastomeric materials and method
