Sulfuric Acid → HCID 86642224, compound

Participants

Reaction Conditions

Reaction Steps

In a glass-made polymerization reactor equipped with a reflux condenser, a dropping funnel, a thermometer and a nitrogen injection nozzle were placed 5 parts of PVA having a mercapto group at an end thereof (average degree of polymerization of 550, degree of hydrolysis of 88.0 mol% and mercapto group (SH) content of 3.2×10-5 equivalent/g) and 100 parts of ion-exchanged water, in which the PVA was completely dissolved at 95° C. The solution was adjusted to pH 3.0 with sulfuric acid, incorporated with 10 parts of methyl methacrylate and 10 parts of n-butyl acrylate, heated to 65° C. after atmosphere in the reactor was replaced with nitrogen, incorporated with 1.3 part of 2% potassium bromate aqueous solution to initiate polymerization and to the mixture were continuously added 40 parts of methyl methacrylate, 38 parts of n-butyl acrylate and 2 parts of 2-hydroxyethyl acrylate over a period of 2 hours. The polymerization was completed after 3 hours from the start thereof, producing a stable copolymer emulsion (I) of methyl methacrylate/n-butyl acrylate/2-hydroxyethyl acrylate having a solid concentration of 50.9%, a viscosity of 750 mPas.s and an average particle diameter of 0.9μm.

Provenance & Evidence