Abstract: According to the present invention, there are provided stable, solid compositions which include (a) a biodispersant, including surfactants; (b) a biocide, including halogenated hydantoins; and (c) optionally, a halogen scavenger, including a hydantoin; In a further embodiment, these compositions are added to a substrate in order to remove or to inhibit the formation of a biofilm and to prevent or to inhibit the growth of or to kill microorganisms.

Abstract: N-halohydantoins are advantageously compacted with saturated, normally solid, fatty amides.

Abstract: Compositions of dimethyloldimethylhydantoin, monomethyloldimethylhydantoin, and dimethylhydantoin having less than 0.1% by weight of free formaldehyde based upon 100% by weight of total composition; and wherein the weight ratio of dimethyloldimethylhydantoin to monomethyloldimethylhydantoin ranges from about 1:1.25 to about 3.5:1, are provided. These compositions may be prepared (1) by reacting dimethylhydantoin and a formaldehyde-containing source wherein the molar ratio of formaldehyde to dimethylhydantoin ranges from about 1.2:1 to about 1.55:1 or (2) by admixing (a) from about 80 to about 90% by weight of an aqueous solution of methyloldimethylhydantoin having greater than about 0.1% by weight of free formaldehyde with (b) about 20 to about 10% by weight of dimethylhydantoin based upon 100% weight of aqueous dimethyloldimethylhydantoin solution and dimethylhydantoin combined.

Abstract: A solid composition comprising a dispersion of at least one alkyl ester of p-hydroxybenzoic acid in a hydroxymethyl-substituted dimethylhydantoin, its method of preparation, and its use as a preservative in shampoos, lotions, and cosmetics.

Abstract: There are provided methods for producing solid anhydrous methylolhydantoins. Initially, an aqueous stirrable medium is dehydrated and heated to yield a substantially anhydrous stirrable melt. The aqueous stirrable medium includes (A) a solute selected from the group consisting of (i) a dimethyloldimethylhydantoin, (ii) a hydantoin reactant, (iii) a formaldehyde source reactant, or (iv) a combination of any of the foregoing; and (B) optionally a catalyst. A molten system is then provided by adding, to the stirrable melt, a reactant mixture which includes (A)(i) the same or a different hydantoin reactant, (ii) a substantially anhydrous formaldehyde source reactant which may be the same as or different than the formaldehyde source reactant, or (iii) a combination thereof; and (B) optionally, the same or a different catalyst; wherein the molten system includes (i) at least one hydantoin reactant and (ii) at least one dehydrated formaldehyde source reactant or substantially anhydrous formaldehyde source reactant.

Abstract: A method for making methylolated hydantoins by reacting a hydantoin, a formaldehyde such as paraformaldehyde and an alkaline catalyst at conditions of temperature and pressure sufficient to induce reaction to obtain a product in essentially 100% active form. Dry methylolated hydantoin product made by this process may be stored or shipped more economically than an aqueous solution containing a methylolated hydantoin.