Acrylic Acid → Diethylene Glycol Monoethyl Ether

Participants

Reaction Steps

This example essentially corresponds to example 3 with the exception that polyether A1) was not used. 140 g of ethylene glycol monobutyl ether and 140 g of diethylene glycol monoethyl ether (twice the quantity of solvent used in example 3 for the purpose of achieving the minimum loading of reaction vessel) were weighed into a 4 liter reaction vessel equipped with stirring, cooling and heating devices and heated to 155° C. A mixture of 510 g of butyl acrylate, 420 g of methyl methacrylate and 75 g of hydroxyethyl acrylate was then added over a period of 2 hours, while simultaneously adding 25.7 g of di-tert.-butyl peroxide dissolved in 8 g of ethylene glycol monobutyl ether and 8 g of diethylene glycol monoethyl ether to form copolymer A2). Immediately thereafter, a mixture of 139 g of butyl acrylate, 195 g of methyl methacrylate, 82 g of hydroxyethyl acrylate and 34 g of acrylic acid was added over a period of 1 hour, while simultaneously adding 19.3 g of di-tert.-butyl peroxide dissolved in 5.5 g of ethylene glycol monobutyl ether and 5.5 g of diethylene glycol monoethyl ether over a period of 1.5 hours to form copolymer A3). After stirring for a further 2 hours at 150° to 155° C., the temperature was reduced to 100° C., 52.5 g of dimethylethanolamine were added and the mixture was dispersed in 1530 g of distilled water. The resulting aqueous binder dispersion had a solids content of 44%, an organic solvent content of 9.6%, an acid number of 21 and an OH number of 53.

Provenance & Evidence