The invention discloses a
terpene resin and a preparation method thereof. The preparation method comprises steps as follows:
terpene substances are used as a
raw material, AlCl3 in the presence of an
aromatic solvent is used as a main catalyst, and a cocatalyst is used in the reaction;
polymerization is carried out at low temperature to prepare the crude
terpene resin product; and the crude terpene resin product is washed and distilled under reduced pressure to obtain the terpene resin product. The cocatalyst is trimethylchlorosilane, triethylchlorosilane, tripropylchlorosilane or tributylchlorosilane, and accounts for 1-5% of the total
mass of the terpene substance
raw material; the main catalyst AlCl3 accounts for 4-12% of the total
mass of the terpene substance
raw material; the elemental
chlorine content in the prepared terpene resin product is less than 100mg / kg, and the
metallic aluminum content is less than 10mg / kg; the terpene resin product does not contain metallic
antimony; and the residue level of the volatile
solvent is less than 25mg / kg. The product reaches to the
food level.