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US 6,150,499 AGranted
Process for preparation of TFPX-dichloride
AssigneeSpecialty Coating Systems, Inc.
InventorsWilliam R. Dolbier, Jr., Jianxin Duan
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Abstract
A method for the synthesis of TFPX-dichloride is disclosed. The method involves reacting hexachloro-p-xylene with anhydrous HF in an inert organic solvent. The reaction is advantageous in that it produces relatively high yields of TFPX-dichloride, provides little waste, and is carried out as a simple, one-step process.
Claims23
A synthesis method comprising the steps of:
- a) providing a first reactant comprising hexachloro-p-xylene;
- b) providing a second reactant comprising anhydrous HF;
- c) providing an organic solvent, the solvent being substantially immiscible with HF and substantially non-reactive with HF and hexachloro-p-xylene;
- and
- d) reacting the first and second reactants in the organic solvent to form a product comprising TFPX-dichloride.
2 more elements
A synthesis method comprising the steps of:
- a) providing a first reactant comprising hexachloro-p-xylene;
- b) providing a second reactant comprising anhydrous HF;
- c) providing an organic solvent comprising 1,2-dichloroethane;
- and
- d) reacting the first and second reactants in the organic solvent to form a product comprising TFPX-dichloride.
2 more elements
A synthesis method comprising the steps of:
- a) providing a first reactant comprising hexachloro-p-xylene;
- b) providing a second reactant comprising anhydrous HF;
- c) providing an organic solvent, the solvent being substantially immiscible with HF and substantially non-reactive with HF and hexachloro-p-xylene;
- d) reacting the first and second reactants in the organic solvent to form a product comprising TFPX-dichloride;
- e) reacting the TFPX-dichloride product to form a parylene dimer;
- and
- f) reacting the parylene dimer using the Gorham process to form polymeric parylene.
4 more elements
Dependencies are inferred from the claim text.