Radiation-chemical hardening of varnish-and-paint coatings

A review of home and foregn papers dealing with chemical-radiation hardening of varnish-and-paint coatings (PC) is given. To prepare radiation hardened PCs mainly composites based on unsaturatd polyesters, epoxy-, wrethan- and acryl oligomers are used. The PC compositions and conditions of hardening using accelerated electrons, on different substrates are given. The compositions, including pigment and filler amount, affect the PC gelatination at different dose rates. Some aspects of oxygen inhibition of polymerization in a surface layer are considered. Taking into account a negative effect of oxygen during the PC radiation hardening and a hard oxygen removal from the irradiation zone, some varnish-and-paint composite materials hardened in air are being developed at present