Fabricated building weather-resistant sealant and preparation method thereof
A prefabricated, sealant technology, applied in the direction of adhesives, adhesive types, polyether adhesives, etc., can solve the problems of poor weather resistance, prone to yellowing, and heavy odor of brushing primers, to improve dispersion and Binding effect, broaden the wavelength of absorbed light, reduce the effect of irritating odor
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Embodiment 1
[0032] Embodiment 1: An assembled building weather-resistant sealant, according to parts by weight, including 50-200 parts of silyl-terminated polyether polymers, 10-30 parts of cross-linking agents, 0.01-0.05 parts of catalysts, 10-200 parts of 15 parts of active branched plasticizer, 2-4 parts of composite anti-yellowing agent, 15-45 parts of core-shell alginate microspheres and 80-120 parts of inorganic filler;
[0033] Add core-shell structure core-shell alginate microsphere particles to the prefabricated building weatherproof sealant formula, the core-shell structure alginate microsphere particles have more micropores on the surface of the shell layer, and the shell layer and the core layer Both contain a large number of active groups and ions that can react with fluoride ions, acid radical ions, etc., which is conducive to improving the performance of acid corrosion resistance of weather-resistant sealants in the natural environment, and is conducive to reducing acid corr...
Embodiment 2
[0036] Embodiment 2: A kind of prefabricated building weather-resistant sealant, according to parts by weight, including 100-150 parts of silyl-terminated polyether polymers, 15-20 parts of cross-linking agents, 0.02-0.04 parts of catalysts, 10-10 parts of 12 parts of active branched plasticizer, 3-4 parts of composite anti-yellowing agent, 25-40 parts of core-shell alginate microspheres and 90-100 parts of inorganic filler;
[0037] Preferably, the active branched plasticizer is a branched type with active carboxyl and hydroxyl groups prepared by esterification of polyether trihydric alcohols and dibasic acid anhydrides in a material ratio of 1:0.1 to 1.5. plasticizer;
[0038] Preferably, the composite anti-yellowing agent 2,3-dihydroxy-4-n-decyloxybenzophenone and tris(1,2,2,6,6-pentamethylpiperidinyl) phosphite The compound type anti-yellowing agent, its weight ratio is 2,3-dihydroxy-4-n-decyloxybenzophenone: three (1,2,2,6,6-pentamethylpiperidinyl ) Phosphite = 1:0.1~10...
Embodiment 3
[0039] Embodiment 3: A kind of prefabricated building weather-resistant sealant, according to weight parts, includes 50 parts of silyl-terminated polyether polymers, 10 parts of crosslinking agents, 0.01 parts of catalysts, and 10 parts of active branched plasticizers , 2 parts of compound anti-yellowing agent, 15 parts of core-shell alginate microspheres and 80 parts of inorganic filler;
[0040] Preferably, the active branched plasticizer is a branched type with active carboxyl and hydroxyl groups prepared by esterification of polyether trihydric alcohols and dibasic acid anhydrides in a material ratio of 1:0.1 to 1.5. plasticizer;
[0041] Preferably, the composite anti-yellowing agent 2,3-dihydroxy-4-n-decyloxybenzophenone and tris(1,2,2,6,6-pentamethylpiperidinyl) phosphite The compound type anti-yellowing agent, its weight ratio is 2,3-dihydroxy-4-n-decyloxybenzophenone: three (1,2,2,6,6-pentamethylpiperidinyl ) Phosphite = 1:0.1~10.
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