抄録
It is desirable for a chlorination product of fish oil available as an ingredient of fireretarding paint to have not only incombustibility but a high melting point. Melting point of the product formerly reported was low, 54°C. But a product the melting point of which is 141°C is obtainable, when fish oil is chlorinated considering the following data obtained in present study:
(1) BPO, benzoyl peroxide, added to fish oil dissolved in a solvent is effective to raise a melting point of the chlorination product.
(2) Chlorination temperature is to be raised gradually from 50-60°C up to 150°C without causing the reaction mixture to boil.
(3) A chlorination product of higher melting point is prepared by chlorination of fish oil polymerized by using di-t-butyl peroxide. When fish oil is polymerized so highly that it becomes solid and insoluble, it is no longer suitable to be used as raw material. Therefore, the polymerization should be so controlled as not to make the oil insoluble.
(4) As the solvent o-dichlorobenzene is recommendable.
(5) Strong phosphoric acid, being effective to prepare the chlorination product of a high melting point, is to be added to the reaction mixture at the end of chlorination at 90°C.
