Yuan-shin Materials Technology Corp.

Chung-shan Institute of Science and Technology, Armaments Bureau, M.n.d

Chun Shan Institute of Science and Technology, Araments Bureau, M.n.d.

Shieh-Jun Wang

Chun-Hsu Lin

Chan-Yuan Ho

Tsair-Feng Lin

Chuan-Yu Chou

Po-Chen Chang

Jao-Jou Tu

Te-Po Liou

Chac-Chou Tu

Wei-Hsiung Ou

A method for producing 1,4-bis(bromodifluoromethyl)tetrafluorobenzene (BFTFB) is disclosed. The target compound is predicted as a very potent monomer for low dielectric constant material. This method comprises the following steps: (a) mixing 1,4-bis(bromodifluoromethyl)tetrafluorobenzene (DFMTFB), a bromination agent, and a solvent (with or without) to form a mixture; (b) heating the mixture under UV radiation; and (c) purifying the resultant to obtain 1,4-bis(bromodifluoromethyl)tetrafluorobenzene (BFTFB) with high purity.

1,4-bis(bromodifluoromethyl) tetrafluorobenzene and producing method thereof

A method for producing 1,4-bis(dichloromethyl)tetrafluorobenzene is disclosed, which is achieved by reacting tetrafluoroterephthaldehyde, SOCland organic solvents. In the synthesis of 1,4-bis(dichloromethyl)-tetrafluorobenzene by adding formamides as catalyst, there are remarkable advantages which include shortening the reaction time; simplifying the synthesizing steps and raising the yield of the product.

Method for producing 1,4-bis (dichloromethyl) tetrafluorobenzene

A method for producing 1,4-bis(difluoromethyl)tetrafluorobenzene is disclosed, which has the following steps: (a) mixing 1,4-bis(dichloromethyl)tetrafluorobenzene, a catalyst, an aprotic polar solvent, and an alkali metal fluoride to form a reaction mixture; (b) heating the reaction mixture; and (c) purifying the resultant to obtain 1,4-bis(difluoromethyl)tetrafluorobenzene.

Method for producing 1,4-bis(difluoromethyl)tetrafluorobenzene

A method for transferring TCPX (&#x3b1;, &#x3b1;, &#x3b1;', &#x3b1;&#x2032;-tetrachloro-p-xylene) into TFPX (&#x3b1;, &#x3b1;, &#x3b1;&#x2032;, &#x3b1;&#x2032;-tetrafluoro-p-xylene) is disclosed, which comprises the following steps: (a) providing a first reactant comprising TFPX; (b) mixing the first reactant with alkali metal fluorides, TCPX and phase transfer catalyst(s) to form a mixture, wherein the alkali metal fluorides is KF, CsF, NaF, LiF or the combination thereof, the phase transfer catalyst(s) is quaternary ammonium salt, quaternary phosphonium salt or the combination thereof; and (c) heating the mixture.

Method for transferring TCPX into TFPX

A method for the synthesis of TFPX (&#x3b1;, &#x3b1;, &#x3b1;', &#x3b1;&#x2032;-tetrafluoro-p-xylene) is disclosed, which comprises the following steps: (a) providing a sulpholane solution comprising TCPX (&#x3b1;, &#x3b1;, &#x3b1;&#x2032;, &#x3b1;&#x2032;-tetrachloro-p-xylene); (b) mixing the sulpholane solution with alkali metal fluoride, and phase transfer catalyst to form a mixture, wherein the phase transfer catalyst is quaternary phosphonium salt; and (c) heating the mixture.

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Taipei, Taiwan

Shieh-Jun Wang