Chung Shan Institute of Science and Technology

Yu-Sheng Lin

Shean-Jeng Jong

Wen-Chiung Su

Yuen-Hsin Peng

Chong Ma

Chang-Chih Lin

A method for preparing a melamine salt of pentaerypolyol phosphoric acid is provided. The method comprises the following steps of: ball milling a mixture of pentaerypolyol and phosphorus pentoxide (PO) under a solvent-free reacting environment to obtain a pentaerypolyol phosphoric acid, and ball milling a mixture of a pentaerypolyol phosphoric acid and melamine without organic solvent reacting environment to obtain a melamine salt of pentaerypolyol phosphoric acid.

Method for preparing melamine salt of pentaerypolyol phosphoric acid

A method for purifying Piribedil includes mixing Piribedil solid having a purity of 98% by weight with water, boiling the mixture, adding slowly 95% ethanol to the boiling mixture to form a clear liquid, filtering the hot clear liquid, cooling the filtrate to obtain a white crystal having a purity of 99.8% by weight of Piribedil.

Method for the purification of Piribedil

A method for synthesizing a pentafluorophenyl acrylate polymer includes bulk polymerizing a pentafluorophenyl acrylate monomer in the presence of a free radical initiator. The reactant mixture was subjected to an ultrasonication treatment, so that the mixing of the initiator and the monomer is enhanced; carried out the bulk polymerization at 25-99&#xb0; C. for a period of time, and at 100-200&#xb0; C. under a vacuum pressure for another period of time to complete the bulk polymerization, so that residue amounts of the initiator, unreacted monomer and oligomer of the monomer are reduced in the resulting reaction mixture.

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Tao-Yuan, Taiwan

Yu-Sheng Lin