PRIMARY COATING D1378 CA FOR OPTIC FIBRE HARDENED BY RADIATION Russian patent published in 2012 - IPC C09D175/14 C09D175/16 C03C25/10 C03C25/26 

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 -25°C to -45°C; and an elasticity module from 0.50 MPa to 1.2 MPa.

EFFECT: improved technological or operational characteristics.

5 cl