Methacrylic Acid → HCID 21092714, compound

Participants

Reaction Steps

Into a 1 l four-necked flask, 10.0 g of methacrylic acid, 15.0 g of n-butyl acrylate, 25.0 g of methyl methacrylate, 10.0 g of 2,2'-azobis(4-methoxy-2,4-dimethylvaleronitrile), 5.0 g of n-dodecylmercaptan and 500 ml of dioxane were charged, dissolved and stirred. Then, stirring was continued under a nitrogen stream at 70° C. for 6 hours. The reaction solution was put into n-hexane to precipitate the resin. Purification was repeated with tetrahydrofuran/n-hexane, and then vacuum drying was conducted at 40° C. to obtain a resin powder. The obtained amount was 40.0 g. The weight average molecular weight as measured by GPC was 4,000 as calculated as polystyrene; the glass transition temperature (Tg) was 65° C.; and the acid value calculated after titration by means of a potentiometer was 130. 25 g of a methacrylic acid/n-butyl acrylate/methyl methacrylate copolymer thus obtained, 4.5 g of a melamine-type heat-curing agent (CYMEL (trademark) 303, manufactured by Mitsui Cyanamid) and 75 g of diethylene glycol dimethyl ether were mixed and dissolved, followed by filtration with a 0.2 μm filter to obtain a planarizing material solution.

Provenance & Evidence