Abstract: Ethylene glycol mono-t-butyl ether is produced by contacting a starting mixture of feed materials comprising ethylene glycol di-t-butyl ether and ethylene glycol with a strongly acidic cation-exchange material, thereby to react said ethylene glycol and ethylene glycol di-t-butyl ether to produce ethylene glycol mono-t-butyl ether; the reaction is carried out at about 30.degree. to 130.degree. C. under an atmospheric pressure or an increased pressure; the molar ratio of the feed ethylene glycol to the feed ethylene glycol di-t-butyl ether is about 1:0.01 to 1:20; the feed material may be a mixture comprising ethylene glycol di-t-butyl ether, ethylene glycol and at least one member selected from the group consisting of ethylene glycol mono-t-butyl ether, diisobutylene, and triisobutylene; also the reaction can be carried out by either a batch process or a continuous flowing process.

Abstract: An improved process for producing ethylene glycol mono-tert-butyl ether by reacting ethylene glycol with isobutylene in the presence of a catalyst of strongly acidic cation-exchange material is disclosed which enables the production of ethylene glycol mono-tert-butyl ether in a high yield while suppressing the formation of by-product ethylene glycol di-tert-butyl ether by previously adding ethylene glycol di-tert-butyl ether to the reaction system and conducting the reaction at temperatures of about 60 to 130.degree. C.

Abstract: A powder coating composition containing a vehicle which comprises about 50 to about 98% by weight of a polycondensate obtained by a polycondensation of a polyol component comprising at least about 30 mol% 2-methylbutane-1,3-diol and a polycarboxylic acid component comprising at least about 50 mol% terephthalic acid and/or dimethyl terephthalate and about 2 to about 50% by weight of a crosslinking agent. The powder coating composition has a good storage stability (or powder stability) and also the boiling water resistance, the smoothness, the gloss, the flexibility, the adhesiveness, etc., in particular of a film thereof is quite excellent.