The invention provides a two-component
casting glue for capsulation of a solar photovoltaic module, which belongs to the field of
high polymer sealing materials. The two-component
casting glue comprises component A and component B; component A comprises the following raw materials of 100 to 120 parts by weight of alpha-
omega-dihydroxy
polydimethylsiloxane, 30 to 50 parts by weight of
silicone oil, 80 to 100 parts by weight of a
heat conducting filling material, 50 to 60 parts by weight of a
flame retardant filling material and 30 to 50 parts by weight of nanometer
calcium carbonate; and component B comprises the following raw materials of 100 to 120 parts by weight of
silicone oil, 20 to 40 parts by weight of a cross-linking agent, 2 to 3 parts by weight of a
coupling agent, 0.5 to 1 part by weight of a catalyst and 1 to 1.5 parts by weight of
colored slurry. The two-component
casting glue has the advantages of effectively promoted
flame resistance, a substantially improved
heat conducting effect, capacity of timely and effectively conducting out heat emitted by a bypass
diode, excellent performance in inhibiting permeability of
water vapor, excellent electrical properties and ideal weatherability and
corrosion resistance. A recommended preparation method for the two-component casting glue is simple and terse and does not have strict requirements on a process and equipment.