Adoption of advanced foreign technology , the main products of C5 petroleum resin , of DCPD resin , C9 petroleum resin , pentaerythritol, dipentaerythritol , sodium formate , calcium formate , hydrogen peroxide and other advanced production technology , strong technical force , the company leading products with an annual capacity of C5 petroleum resin 20, 000 tons , 15, 000 tons of DCPD resin , C9 petroleum resin , 18, 000 tons , 20, 000 tons of pentaerythritol , dipentaerythritol 800 tons of sodium formate 20, 000 tons , 15, 000 tons of calcium formate . 10 000 tons of hydrogen peroxide .