A silane-modified polyether sealant with good adhesion to plastics
A silane-modified polyether and sealant technology, which is applied in the direction of polyether adhesives, adhesives, adhesive types, etc., can solve problems such as poor bonding performance, achieve reduced production costs, good bonding performance, The effect of improving productivity
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Embodiment 1
[0037] An adhesion promoter, prepared by the following method:
[0038] In a 1L three-necked flask equipped with a thermometer and a condenser, add 496g of γ-methacryloxypropyltrimethoxysilane and 12.5g of boric acid, drop in 0.15g of hydrochloric acid solution, shake evenly, and make the pH of the reaction solution≤ 3. Then heat up to 100-110°C for reflux, and react for 3 hours. During this period, every hour of reaction, stir for 3 minutes, and the speed is controlled at 20-30rpm. After the reaction is completed, cool to 20-30°C, and then add 100g Dry the magnesia at 150°C for 2 hours, remove water and neutralize, mix evenly, test the pH value with pH test paper regularly, when the measured pH is 6-7, filter to obtain 493.7g boron-containing viscous Adhesion promoter, the adhesion promoter is a light yellow transparent substance.
Embodiment 2
[0040] A silane-modified polyether sealant prepared by the following method:
[0041] Step 1: 20 parts of STP-E30, 10 parts of STP-E15, 15 parts of diisononyl cyclohexane-1,2-dicarboxylate, 10 parts of heavy calcium carbonate, 40 parts of nano calcium carbonate, 3 parts of titanium Add white powder into the stirring tank, control the vacuum at -0.09~-0.1MPa, stir for 5min, raise the temperature to 100-110°C, and stir for 2h;
[0042] Step 2: Cool down to 80-85°C, add 2 parts of polyamide wax, control the vacuum at -0.09~-0.1MPa, stir for 30 minutes, and the stirring speed is 700rpm;
[0043] Step 3: Control the vacuum degree at -0.09~-0.1MPa, cool to below 50°C, add 0.5 parts of vinyltrimethoxysilane, 1.5 parts of the adhesion promoter of Example 1, 0.5 parts of N-β-(ammonia Ethyl)-γ-aminopropyltrimethoxysilane, 0.1 part of modified organotin, stirred for 30 minutes, and the rotation speed is 300 rpm, to obtain.
Embodiment 3
[0045] A silane-modified polyether sealant prepared by the following method:
[0046] Step 1: Add 15 parts of STP-E10, 10 parts of STP-E35, 15 parts of diisononyl phthalate, 13 parts of heavy calcium carbonate, 40 parts of nano calcium carbonate, and 2 parts of carbon black into the stirring tank , the vacuum degree is controlled at -0.09~-0.1MPa, stirred for 5 minutes, heated to 100-110°C, stirred for 2 hours;
[0047] Step 2: Cool down to 80-85°C, add 2 parts of polyamide wax, control the vacuum at -0.09~-0.1MPa, stir for 30 minutes, and the stirring speed is 750rpm;
[0048]Step 3: Control the vacuum degree at -0.09~-0.1MPa, cool to below 50°C, add 1 part of vinyltrimethoxysilane, 1 part of the adhesion promoter of Example 1, and 1 part of γ-aminopropyltrimethyl Oxysilane, 0.1 part of modified organotin, stirred for 30 minutes, and the rotation speed was 300 rpm.
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