US 6,143,204 A · Stabilization of iodopropynl compounds

Abstract

A highly stable liquid formulation having broad spectrum preservative properties which constitutes an admixture of a dialkanol-substituted DMH, an iodopropynyl compound, a stabilizer of a hydantoin, urea or derivative thereof, and a hydroxyl solvent. Preferably the constituents are dimethyloldimethylhydantoin, 3-iodo-2-propynylbutyl carbamate, dimethylhydantoin, and a glycol solvent. The preservative preferably has a total formaldehyde content of 5% and less than 0.2% of free formaldehyde. The composition is prepared by successively admixing the dialkanol-substituted dimethylhydantoin and the stabilizer, the hydroxyl solvent, and the iodopropynyl compound. Also described is a stabilized iodopropynyl compound preferably containing dimethylhydantoin as the stabilizer.

Claims6

Dependent claims

A stabilized iodopropynyl solution which consisting essentially of an iodopropynyl compound and a stabilizer which is

(i) a hydantoin or derivative thereof represented by Formulas III, IV, or V:
##STR8## wherein R.sub.1 to R.sub.4 are independently selected from H, C.sub.1 to C.sub.22 ;
##STR9## wherein R.sub.1 to R.sub.5 are independently selected from H or C.sub.1 to C.sub.22 ;
or ##STR10## wherein R.sub.1 to R.sub.6 are independently selected from H, CH.sub.3, C.sub.2 H.sub.5 or C.sub.3 H.sub.7 ;
or (ii) urea or derivative thereof represented by Formula VI:
##STR11## wherein R.sub.1 to R.sub.4 are independently selected from H or C.sub.1 to C.sub.12 ;
the ratio of said stabilizer to iodopropynyl compound being from 150:1 to 0.05:1 and sufficient to chemically stabilize the iodopropynyl compound.

4 more elements

Dependencies are inferred from the claim text.

Stabilization of iodopropynl compounds

Life of this patent

Stabilization of iodopropynl compounds

Life of this patent

Abstract

Claims6