Method for preparing a dibutyl tin difluoride powder for coating

Details Method for preparing a dibutyl tin difluoride powder for coating Method for preparing a dibutyl tin difluoride powder for coating

1985-08-14

1987-09-15

Sneed, Helen M. S.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heavy metal containing

C07F 722

Patent

active

046940910

ABSTRACT:
A method for preparing dibutyl tin difluoride which comprises reacting dibutyl tin chloride and ammonium difluoride to form dibutyl tin difluoride; dissolving the dibutyl tin difluoride in an appropriate solvent to form a solution; adding a refractory powder having a predetermined particle size to the solution to act as a recrystallization initiator; rapidly cooling the solution to recrystallize the dibutyl tin difluoride; washing the recrystallized dibutyl tin difluoride at least once with a suitable solvent; and recovering a final dibutyl tin difluoride product having spherical grains averaging 15-25 microns in size which are free of alkaline-earth and alkali impurities. The products produced by this process. A method for depositing tin oxide upon a substrate which comprises preparing a dibutyl tin difluoride powder by the method described above; providing a heated substrate; and depositing the dibutyl tin difluoride powder upon a desired surface portion of the heated substrate so as to pyrolyze the powder, thus coating the desired surface portion with tin oxide.

REFERENCES:
patent: 3677814 (1972-07-01), Gillery
patent: 4182783 (1980-01-01), Henery
patent: 4254046 (1981-03-01), Franz et al.
patent: 4325988 (1982-04-01), Wagner
patent: 4533571 (1985-08-01), Kramer et al.

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