| abstract |
(57) [Summary]nAn extremely stable liquid formulation having a broad spectrum preservative comprising a mixture of dialkanol-substituted DMH, a stabilizer of iodopropynyl compound, hydantoin, urea or a derivative thereof, and a hydroxylic solvent. The components are preferably dimethylol dimethylhydantoin, 3-iodo-2-propynylbutyl carbamate, dimethylhydantoin, and a glycol solvent. The preservatives preferably have a total formaldehyde content of 5% and a free formaldehyde of less than 0.2%. This composition is prepared by sequentially mixing a dialkanol-substituted dimethylhydantoin and a stabilizer, a hydroxyl solvent, and an iodopropynyl compound. Stabilized iodopropynyl compounds which preferably contain dimethylhydantoin as a stabilizer are also described. |