the invention concerns the continuous production of asphalts modified by the addition of polymers and reacted with sulfur . the binders produced by said methods can contain very high amounts of polymers , also combined with secondary materials such as : rubber , various plastics , and waste lubricants . this type of binder , which cannot be obtained by discontinuous batch technology , is produced by the continuous mixing of several asphalt components through a static mixer . said binders provide very high - performance asphalts and agents for regenerating old asphalts contained in waste road materials , in the process of hot recycling of coated materials . they are also used for producing novel emulsions of highly modified binders , with multiple applications and in particular for cold recycling . this novel method , by regenerating old asphalt contained in waste coated materials , represents a means for waste conversion and for limiting the use of asphalt and road - surfacing aggregates .