[1][3] In the succeeding years, reflecting the progressive shift of DSM's activities from coal mining to chemicals derived from coal and, later, from natural gas, Stamicarbon's technology portfolio grew to include a number of other products, including urea and the urea derivative melamine, caprolactam, polyethylene, phenol, and EPDM rubber.
[4] Today the market stands at about 170 million metric tonnes per year and is still growing at an annual rate of about 3%.
[5] In 1957, Stamicarbon sold its first urea license to Société Carbochimique in Tertre, Belgium, for a plant with a capacity of 70 metric tons per day (mtpd).
Once every four years Stamicarbon holds its Urea Symposium, at which new technical developments are introduced and social contacts are established or refreshed.
First held in 1966, when it was attended by 31 participants, representing 16 licensees from 11 countries, the invited audience has been expanded to include contractors and equipment suppliers.