Methyl Methacrylate → HCID 86584213, compound

Participants

Reaction Steps

A water-soluble polymer (300 parts) consisting of methacrylic acid and sodium p-styrenesulfonate (70:30) and 30 parts of sodium sulfate were dissolved in 6595 parts of water and placed in a polymerization vessel equipped with a paddle-shaped stirrer. After that, 15 parts of 2,2′-azobis (2,4-dimethylvaleronitrile) were dissolved in a mixture of 2300 parts of methyl methacrylate, 250 parts of methacrylic acid and 500 parts of divinylbenzene, placed in a polymerization vessel and subjected to a suspension polymerization at 60° C. for 2 hours under a stirring condition of 300 rpm to give a cross-linked copolymer of methyl methacrylate/methacrylic acid/divinylbenzene having an average particle size of 60 μm. Since the resulting polymer was a carboxylic acid type, it was adjusted to pH 12 using 0.1N aqueous solution of potassium hydroxide at room temperature to give a potassium type. The resulting particles were pulverized, applied and corrugated by the same manner as in Example 1 and the two-minute moisture-absorbing and desorbing rates were measured. The evaluated result is shown in Table 2 and, since the amount of carboxyl group of a potassium type was very little, equilibrium moisture-absorbing ratio was low and the two-minute moisture-absorbing and desorbing rates were extremely slow as well whereby the product is meaningless in practical use.

Provenance & Evidence