FIELD: polymer production for optics.
SUBSTANCE: manufacture of a protective coating for optical fibers. A heat-resistant solvent-borne coating of an optic fiber is made by pulling the light fiber through an orifice containing a polyimide solution, followed by removal of the solvent. The polyimide is a homo- or copolyimide of formula I with a molecular weight of 45-350 kDa
,
where x:y=(0.25-1):(0.75-0);
.
EFFECT: enhancement of the coating adhesion to the light fiber.
2 cl, 2 dwg, 1 tbl, 26 ex
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