The invention provides a low-
moisture curing dealcoholization type
silicone sealant and a preparation method thereof. The low-
moisture curing dealcoholization type
silicone sealant is prepared from the following components in parts by
mass: 100 parts of alpha,
omega-dihydroxy
polydimethylsiloxane, 70-140 parts of nano
calcium carbonate, 3-10 parts of dimethyl
silicone oil, 1-4 parts of modified
silicone oil, 3-10 parts of a composite cross-linking agent, 0.5-2 parts of a
coupling agent A, 0.5-1.5 parts of a
coupling agent B and 2-6 parts of a
titanate catalyst, the
coupling agent A is one or a mixture of more of gamma-
glycidyl ether oxypropyl trimethoxy
silane, gamma-
glycidyl ether oxypropyl triethoxy
silane, gamma-aminopropyl trimethoxy
silane and gamma-aminopropyl methyl diethoxy silane, and the coupling agent B is one or a mixture of more of gamma-
glycidyl ether oxypropyl trimethoxy silane, gamma-glycidyl
ether oxypropyl triethoxy silane, gamma-aminopropyl trimethoxy silane and gamma-aminopropyl methyl diethoxy silane; the coupling agent B is one or a mixture of two of an
epoxy silane
oligomer and an amino silane
oligomer, the structure of the coupling agent B is as shown in formulas I, II and III, and the
mass ratio of the # imgabs0 # coupling agent A to the coupling agent B is (0.9-1.3): 1. The
silicone sealant prepared by the method can be quickly cured, the
curing time is shortened, and the construction efficiency in winter is improved.