▎ 摘　　要

NOVELTY - One-component graphene high temperature deacidification type silicone sealant comprises 100 pts. wt. alpha , omega -dihydroxy liquid polysiloxane, 3-5 pts. wt. a crosslinking agent, 6-20 pts. wt. a high reinforcing filler, 1-2 pts. wt. a high temperature degradation inhibitor, 1-2 pts. wt. high temperature antioxidant, 0.5-1.5 pts. wt. tackifier and 0.01-0.1 pts. wt. catalyst. The alpha , omega -dihydroxy liquid polysiloxane is alpha , omega -dihydroxypolydimethylsiloxane or alpha , omega -dihydroxy polymethylphenylsiloxane having a viscosity of 5000-80000 mPa-s. The crosslinking agent is mixture of methyl triacetoxysilane, ethyl triacetoxysilane and/or vinyl triacetoxysilane. The reinforcing filler is modified fumed silica. The high temperature degradation inhibitor is a tetrafunctional silane. The high temperature antioxidant is graphene or graphene oxide. The tackifier is di-tert-butoxydiacetoxysilane, gamma -(2,3-epoxypropoxy)propyltrimethoxysilane or gamma -methacryloxypropyltrimethoxysilane. USE - Used as one-component graphene high temperature deacidification type silicone sealant. ADVANTAGE - The sealant has excellent high temperature resistance, degradation resistance and storage stability, and good bonding property to a metal substrate. DETAILED DESCRIPTION - One-component graphene high temperature deacidification type silicone sealant comprises 100 pts. wt. alpha , omega -dihydroxy liquid polysiloxane, 3-5 pts. wt. a crosslinking agent, 6-20 pts. wt. a high reinforcing filler, 1-2 pts. wt. a high temperature degradation inhibitor, 1-2 pts. wt. high temperature antioxidant, 0.5-1.5 pts. wt. tackifier and 0.01-0.1 pts. wt. catalyst. The alpha , omega -dihydroxy liquid polysiloxane is alpha , omega -dihydroxypolydimethylsiloxane or alpha , omega -dihydroxy polymethylphenylsiloxane having a viscosity of 5000-80000 mPa-s. The crosslinking agent is mixture of methyl triacetoxysilane, ethyl triacetoxysilane and/or vinyl triacetoxysilane. The reinforcing filler is modified fumed silica. The high temperature degradation inhibitor is a tetrafunctional silane. The high temperature antioxidant is graphene or graphene oxide. The tackifier is di-tert-butoxydiacetoxysilane, gamma -(2,3-epoxypropoxy)propyltrimethoxysilane or gamma -methacryloxypropyltrimethoxysilane. The catalyst is dibutyltin dilaurate or dibutyltin dioctoate. An INDEPENDENT CLAIM is also included for preparing one-component graphene high temperature deacidification type silicone sealant, comprising adding alpha , omega -dihydroxy liquid polysiloxane and the crosslinking agent in a vacuum kneader, heating to 60-70 degrees C and simultaneously vacuuming to 0.06-0.09 MPa, stirring at a constant speed for 1.5-2 hours, adding high reinforcing filler, high temperature degradation inhibitors, high temperature antioxidant and catalyst, maintaining the above heating temperature and vacuum, stirring at a constant speed for 1-2 hours and then cooling to room temperature, adding tackifier, uniformly stirring for 1-2 hours, then discharging, sealing and storing