Industry share: Preparation method of acrylic pressure sensitive tape with high temperature resistance mesh 2

Preparation method of acrylic pressure sensitive tape with high temperature resistance mesh 2

The utility model relates to a high temperature resistant mesh acrylic pressure sensitive tape, which comprises a mesh release film and a modified acrylic pressure sensitive adhesive coated on the surface of the mesh release film. Wherein, the composition of the modified acrylic pressure sensitive adhesive is calculated by weight, including 20 of butyl acrylate, acrylic   2 ethyl caproic ester 18,  2  hydroxyl ethyl acrylate 15, eight aniline propyl cage half as many poly siloxanes 6. 5 copies of tungsten, acrylic amide acid scandium powder 4. 2, initiator 1. 2, the first solvent 6 and 14-second solvent.

Wherein, the mesh release film is a PET material release film; The first solvent and the second solvent composition are the same, are toluene; The initiator is azobisisobutyronitrile.

Among them, the preparation method of the acrylamide scandium tungstate powder is S1. Preparation of amino-modified scandium tungstate powder: The scandium tungstate powder and 30% hydrogen peroxide aqueous solution were mixed, dispersed evenly, and heated to boiling, reflux condensation, and stirring for 8h. After natural cooling, solid particles were filtered out by vacuum, washed three times, and then vacuum dried to obtain hydroxyl-modified scandium tungstate powder. Among them, the weight ratio of scandium tungstate powder to hydrogen peroxide solution is 1:10;

The hydroxy-modified scandium tungstate powder was mixed with 60% ethanol aqueous solution, dispersed evenly, and the amino silane coupling agent KH792 was added. After stirring at 25℃ for 8h, the temperature was heated to boiling, and the reflux condensation was stirred for 5h. After natural cooling, the solid particles were filtered out by vacuum, washed three times, and then vacuum dried to obtain the amino-modified scandium tungstate powder.  Among them, the weight ratio of hydroxy-modified scandium tungstate powder, amino silane coupling agent KH792 and ethanol aqueous solution is 1:0.06:6.

S2. Preparation of scandium acrylamide tungstate: the amino-modified scandium tungstate powder is dispersed in tetrahydrofuran solvent, constantly stirring until uniform, then heating up to 40℃, add acrylic anhydride drop by drop, under the condition of shade, heat preservation stirring for 15h, remove the unreacted acrylic anhydride and tetrahydrofuran solvent, scandium acrylamide tungstate powder obtained; Among them, the weight ratio of amino-modified scandium tungstate powder, acrylic anhydride, and tetrahydrofuran solvent is 1:3:4:15.

The preparation method of the above high temperature resistant mesh acrylic pressure sensitive tape includes the following steps:

Step 1: Prepare complex modified scandium tungstate mixture: The powder of scandium acrylamide tungstate was dispersed in the first solvent, octa aniline propyl cage polysesquisiloxane was added, ultrasonic uniformity, and then at 25℃, at the speed of 800r/m for 18h, the complex modified scandium tungstate mixture was obtained.

Step 2: Prepare modified acrylic pressure sensitive adhesive: Butyl acrylate and acrylic acid   2 ethyl caproic ester, ethyl 2  hydroxyl acrylic  mixed into the second solvent, stir to dissolve, straight ventilation with nitrogen gas as shielding gas, with half of the initiator, heating up to 60 ℃, stir at a speed of 100 r/m after 1 h, adding the other half of the initiator, At the same time, the compound modified scandium tungstate mixture was added drop by drop within 30min, and then the temperature was raised to 70℃, and the temperature was kept and stirred at the speed of 200r/m for 4h. After the reaction, the modified acrylic pressure sensitive adhesive was obtained by natural cooling.

Step 3: Prepare high temperature resistant mesh acrylic pressure-sensitive tape: cut the mesh release film and lay it on a flat surface, and use the machine to coat the modified acrylic adhesive on the top, and dry it in the oven at 100 ℃ for 5min to obtain high temperature resistant mesh acrylic pressure sensitive tape.