Polyphosphoric Acid Ppa 105 115 Catalyst Asphalt Modification
Polyphosphoric Acid (PPA 105%–115%)
Polyphosphoric acid in the commercial range of 105%–115% is deployed as a catalyst and asphalt modification agent, but it is not a single molecular species. The material is an oligomeric mixture of orthophosphoric acid, pyrophosphoric acid, triphosphoric acid, and higher linear condensed phosphates. The grade designation...
