Process for radiation curing of EPDM roof sheeting utilizing crosslinking promoters

摘要

EPDM roof sheeting is prepared by ionizing radiation curing of a sheet calendered from 100 parts uncured EPDM elastomer, 40-150 parts carbon black, 30-100 parts process oil and an ionizing radiation crosslinking promoter. Preferably, the promoter is dicumyl peroxide, alpha , alpha 'bis (t-butylperoxy) diisopropylbenzene, liquid high vinyl 1,2-polybutadiene resin or ethylene glycol dimethacrylate and an average dose of ionizing radiation of about 15 to about 35 megarads is used to produce sheeting meeting RMA (Rubber Manufacturers Association) Roofing Council tensile strength and elongation requirements for non-reinforced black EPDM rubber sheeting used in roofing applications.