Ethylene Glycol → Dimethyl terephthalate

Participants

Reaction Steps

200 g of the above obtained 30 % solution of an oligohydantoin in cresol is mixed with a solution of 200 g of a polyester obtained from 1,6 mol terephthalic acid dimethylester, 1,2 mol ethylene glycol and 0,8 mol glycerine and having 6 % by weight OH groups in 480 g m-cresol at 50°C. A homogeneous solution having a viscosity of 5800 cP20°C is obtained. This solution is applied to a warm metal sheet and stoved for half an hour at 230°C and about 3 minutes at 300°C to a clear lacquer film having a pencil hardness of 5 H.

Provenance & Evidence