Emulsion modification agent of adhesive

Solution A is first prepared by mixing 44g deionized water with 0.25g polyoxyethylene nonyl ether sulfate (0NH4. Polyoxethyene Nonyl ether sulfate, China Japan Synthesis Company).

In addition, 76.7g deionized water, 2.9g polyoxyethylene nonyl pheny1 ether, 12.9g polyoxyethylene nonyl pheny1 ammonium sulfate, 157.3g were obtained 2-ethylhexyl acrylate monomer, 102.6g dioctyl maleate monomer, 85.5g ethyl collate.

The olefin monomer and 1.0g acetyl oxyethylene methacrylate ethyl monomer were prepared into a 5B solution by uniform stirring.

In addition, 87.5g of deionized water, 1.8g of sodium bicarbonate, and 0.9g of potassium persulfate were prepared into a C solution by uniform stirring.

In addition, 20.5g of deionized water and 0.9g of potassium persulfate were prepared into a D solution by uniform stirring. Solutions A, B, C, and D can be prepared separately.

10 Pour solution A and solution D (half of the total amount) into the emulsion polymerization equipment, which includes: an agitator, temperature meter, heater, reflux condensing tube, and five-neck flask. When it was heated to 70℃, B solution (1/10 of its total) was mixed with 1/2D solution and fed within 20-30 minutes. Then the temperature was raised to 80℃, and the remaining B solution (9/10) and C solution were fed for 240 minutes respectively.

The temperature rises to 85℃ and is maintained for 90 minutes before cooling to room temperature. The solid 15 composition of the emulsion modifier was 59.5%, the pH value was 5.2, and the viscosity was 23000 cps.