Method for forming a coated substrate

Details Method for forming a coated substrate Method for forming a coated substrate

1987-07-27

1989-03-14

Bell, Janyce

Coating processes

Optical element produced

Transparent base

427108, 4271262, 4271263, 427165, 427226, 427314, 65 6052, B05D 506, B05D 512

Patent

active

048123323

ABSTRACT:
A method for preparing dibutyl tin difluoride which comprises reacting dibutyl tin chloride and ammonium fluoride 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: 3792059 (1974-02-01), Hechenbleikner
patent: 4036866 (1977-07-01), Larkin
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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