High-weather-fastness polysulfide sealant
A technology of polysulfide sealant and weather resistance, which is applied in the field of sealant, can solve the problems of insufficient weather resistance of polysulfide sealant, and achieve the effect of inhibiting free radical reaction, improving weather resistance and good mechanical properties
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[0066] The present invention is further described below in conjunction with embodiment.
[0067] Six formulations in Table 1 were used to prepare polysulfide sealant and high weather resistance polysulfide sealant of the present invention.
[0068] The base paste (A component) and vulcanized paste (B component) are prepared and kneaded separately.
[0069] When weighing the raw materials of the base paste, first weigh the solid materials such as nano-calcium carbonate, light calcium carbonate, titanium dioxide, carbon black, antioxidant, and anti-ultraviolet agent according to Table 1, and then weigh the liquid materials such as liquid polysulfide glue; After the above liquid material is mixed evenly, it is then mixed evenly with the previously weighed solid material, fully wetted, and repeatedly ground until a uniform paste is obtained, that is, the base paste.
[0070] When preparing the vulcanized paste, first weigh butyl benzyl phthalate, manganese dioxide and lead dioxid...
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