Glacial Acrylic Acid (250 ppm MEHQ)/5 g in Second Stag "TRITON" X-405 (70% solids)/30.0 g in deionized water/65.0 ml Ammonium Persulfate in 1.5 ml of water/0.6 g Sodium Hydrosulfite in 6 ml of water/0.8 g Glacial Acrylic Acid (250 ppm MEHQ)/4 g in Ethyl Acrylate (15 ppm MEHQ)/260.0 g in deionized water/56.0 ml Deionized Watr/100.0 ml Deionized Watr/- Ammonium Persulfate in 1.5 ml of water/0.6 g "TRITON" X-405 (70% solids)/30.0 g Ethyl Acrylate (15 ppm MEHQ)/300.0 g Methyl Methacrylate (10 ppm MEHQ)/155.0 g Methyl Methacrylate (10 ppm MEHQ)/175.0 g Sodium Hydrosulfite in 6 ml of water/0.7 g
配制方法:
Charge the water and emulsifier into a 31. 3-neck round bottom flask prepared as in the procedure above and cool to 20'C. With stirring and nitrogen purging, add the ethyl acrylate and methyl methacrylate, maintaining the temperature at 20'C. Remove cooling bath (if used) and add the ammonium persulfate and hydrosulfite. Allow exotherm to start and slowly add the acrylic acid solution as the temperature rises to a peak of 60'C. After the peak temperature has been reached, continue stirring and nitrogen purge at 60'C for 60 minutes. cool the emulsion to 20'C and add the second stage materials in the order listed. After the peak temperature has been reached again, continue stirring and nitrogen purge at 70'C for 60 minutes. Cool the product to 20'C, adjust the pH to 9.5 with 28% aqueous ammonia, and strain through cheesecloth. The solids content is about 45.0% (calculated 45.5%).
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