Water-based acrylic acid pressure-sensitive adhesive and preparation method thereof
A technology of acrylic pressure-sensitive adhesives and acrylic monomers, applied in the field of pressure-sensitive adhesives, can solve the problems of poor high temperature resistance, high initial adhesion, poor water resistance and low temperature resistance, etc., and achieve improved peel strength and high temperature resistance. Effect
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Embodiment 1
[0021] Step 1. Proportioning raw materials, namely acrylic acid monomer (0.84:1 methyl methacrylate and hydroxyethyl acrylate), 0.2wt% ammonium persulfate initiator, 1wt% emulsification based on the acrylic monomer mass as 100wt% (The mass ratio is 1.5:1 CO-459 emulsifier and NPES 45 emulsifier), 8wt% tetramethyltetravinylcyclotetrasiloxane.
[0022] Step 2: Put acrylic monomer, emulsifier, sodium bicarbonate and water into the flask, and mechanically stir on a high-speed shearing machine at 1000 rpm for 20 minutes to obtain a pre-emulsified water dispersion.
[0023] Step 3. Take 0.10 of the emulsified water dispersion of the total mass of the pre-emulsified water dispersion and 0.10 of the ammonium persulfate of the total mass of the ammonium persulfate initiator, and put them into a constant pressure drop device, agitator, and condenser. Into a 500ml four-necked flask with nitrogen and nitrogen, and pass nitrogen protection, adjust the temperature to 7℃, polymerize for 1 hour, a...
Embodiment 2
[0028] Step 1. Proportioning raw materials, namely acrylic acid monomer (0.62:1 methyl methacrylate and hydroxyethyl acrylate), 0.8wt% ammonium persulfate initiator, 5wt% emulsification based on the acrylic monomer mass as 100wt% (The mass ratio is 1.1:1 CO-459 emulsifier and NPES 45 emulsifier), 15wt% tetramethyltetravinylcyclotetrasiloxane.
[0029] Step 2: Put acrylic monomer, emulsifier, sodium bicarbonate and water in the flask, and mechanically stir at 3000 rpm on a high-speed shearing machine for 10 minutes to obtain a pre-emulsified water dispersion.
[0030] Step 3: Take 0.30 of the emulsified water dispersion of the total mass of the pre-emulsified water dispersion, and 0.30 of the ammonium persulfate of the total mass of the ammonium persulfate initiator, and put them into a constant pressure drop device, agitator, and condenser. Into a 500ml four-neck flask with nitrogen and nitrogen, and pass nitrogen protection, adjust the temperature to 85℃, polymerize for 0.5h, and ...
Embodiment 3
[0035] Step 1. Proportioning raw materials, namely acrylic acid monomer (0.75:1 methyl methacrylate and hydroxyethyl acrylate), 0.5wt% ammonium persulfate initiator and 3wt% emulsification based on the acrylic monomer mass as 100wt% (The mass ratio of CO-459 emulsifier and NPES 45 emulsifier is 1.3:1), 12wt% tetramethyltetravinylcyclotetrasiloxane.
[0036] Step 2: Put acrylic monomer, emulsifier, sodium bicarbonate and water into the flask, and mechanically stir at 2000 rpm on a high-speed shear for 15 minutes to obtain a pre-emulsified water dispersion.
[0037] Step 3. Take 0.2 of the emulsified water dispersion of the total mass of the pre-emulsified water dispersion, and 0.2 of the ammonium persulfate of the total mass of the ammonium persulfate initiator, and put them into a constant pressure drop device, agitator, and condenser. Into a 500ml four-neck flask with nitrogen and nitrogen, and pass nitrogen protection, adjust the temperature to 80℃, polymerize for 0.75h, and obta...
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Abstract
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