Elastic self-adhesive waterproof coiled material and preparation method thereof
A self-adhesive waterproof membrane, elastic technology, applied in the direction of fire prevention, adhesives, adhesive types, etc., can solve the problem of weak initial adhesion and adhesion, can not achieve waterproof effect, self-adhesive asphalt waterproof membrane bonding performance Poor and other problems, to achieve the effect of improving high and low temperature resistance and flame retardant performance, improving waterproof effect, and increasing the scope of application
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Embodiment 1
[0033] Preparation of modified magnesium hydroxide:
[0034] Mix γ-aminopropyltriethoxysilane with 90% ethanol aqueous solution, ultrasonically disperse for 5 minutes, then add magnesium hydroxide, and stir and react for 2 hours at a temperature of 80 °C. After the reaction is completed, centrifuge and wash , and dried at 105°C for 6 hours to obtain modified magnesium hydroxide; control, the dosage ratio of magnesium hydroxide and 90% volume fraction of ethanol aqueous solution is 1g:50mL, and the addition amount of γ-aminopropyltriethoxysilane is 6% by mass of magnesium hydroxide.
[0035] Preparation of modified silica:
[0036] Disperse nano-silica in deionized water, ultrasonically disperse for 1 hour to obtain a suspension, add tris(hydroxymethyl)aminomethane to the suspension, add hydrochloric acid to adjust the pH to 8-9, then add dopamine hydrochloride and stir After 24 h, after stirring, the modified silica was obtained by suction filtration under reduced pressure a...
Embodiment 2
[0041] Preparation of additives is prepared by the following steps:
[0042] In step S11, diisopropanol and N,N-dimethylacetamide are mixed, and under nitrogen protection, maleic anhydride is dissolved in N,N-dimethylacetamide and added, and after the dropwise addition is completed, The reaction was stirred at room temperature for 4h to obtain monomer a; the molar ratio of diisopropanol and maleic anhydride was 1:1;
[0043] Step S12, under nitrogen protection, mix monomer a and hexadecamethyl-1,15-dihydroxyoctasiloxane, then add p-toluenesulfonic acid, heat up to 140°C, react at normal pressure for 2 hours, and reduce pressure React for 2h, then continue to add monomer a and p-toluenesulfonic acid, react at normal pressure for 2h, and react under reduced pressure for 2h to obtain hyperbranched polymer; the total amount of monomer a and hexadecyl-1,15-dihydroxyl The dosage and mass ratio of octasiloxane is 7.3:5; the dosage ratio of monomer a twice is 1:3; the amount of p-tol...
Embodiment 3
[0046] A preparation method of an elastic self-adhesive waterproof roll material, comprising the following steps:
[0047] At a temperature of 160°C, mix the asphalt and polyisobutylene. After the addition, increase the temperature to 180°C and add the styrene-butadiene-styrene block copolymer, stir for 1 hour, and maintain the temperature at 185°C. Grind with a colloid mill for 1 h while stirring; add rosin resin and stir for 0.5 h, when the temperature is adjusted to 175 °C, add the flame retardant prepared in Example 1 and the additive prepared in Example 2, stir for 10 min, and then cool down to about 150 °C, The asphalt rubber compound is prepared; the self-adhesive adhesive layer is prepared by using the asphalt rubber compound as a raw material, the upper and lower sides of the self-adhesive adhesive layer are respectively covered with high-density polyethylene and PET isolation films, and the waterproof membrane is obtained by curling and packaging.
[0048] The self-a...
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