PRIMARY COATING D1378 CA FOR OPTIC FIBRE HARDENED BY RADIATION

摘要

FIELD: construction. ^ SUBSTANCE: primary coating composition hardened by radiation contains oligomer; monomer-dissolvent; photoinitiator; antioxidant; and adhesion intensifier; besides, the specified oligomer represents a product of reaction: hydroxyethylacrylate; aromatic isocyanate; aliphatic isocyanate; polyol; catalyst; and inhibitor, at the same time the specified catalyst represents a bismuth organic catalyst; at the same time the specified oligomer has an number-average molecular weight from at least 4000 g/mole to less than or equal to 15000 g/mole; and at the same time the hardened film of the specified coating composition hardened by radiation has a peak of dielectric loss tangent of glass-transition temperature from -25C to -45C; and an elasticity module from 0.50 MPa to 1.2 MPa. ^ EFFECT: improved technological or operational characteristics. ^ 5 cl