Abstract: The antimicrobial preservative composition consisting essentially of (a) from 0.5 to 20 wt. % dihalogenated butane having terminal cyano groups and (b) from 80 to 99.5 wt. % of a heterocyclic poly(hydroxy lower alkylamide) in a weight ratio of between 0.5:2 and 0.5:25 which mixture exhibits a synergistic antimicrobial affect over each of components (a) or (b) taken individually.

Abstract: The use of glycine anhydride dimethylol, also known as 1,4-bis(hydroxymethyl)-2,5-piperazinedione, comprising the formula ##STR1## to kill microorganisms present in or on a host substance and to preserve products susceptible to contamination by a variety of microorganisms is disclosed.

Abstract: A water soluble preservative antimicrobial composition for addition to commercial use products at predetermined use levels to provide synergistic biocidal activity against a wide range of fungi and gram-negative and gram-positive bacteria, comprising an active liquid blend of(1) an admixture of(a) one or more methylol compounds selected from the group consisting of N-[1,3-bis (hydroxymethyl)-2,5-dioxo-4-imidazolidinyl]-N,N'-bis (hydroxymethyl) urea; 1,3-dimethylol-5,5-dimethyl hydantoin; sodium hydroxymethyl glycinate; 1,1-methylene bis[3-[3-(hydroxymethyl)-2,5-dioxo-4-imidazolidinyl]urea]; and glycine anhydride dimethylol; and(b) 3-iodo-2-propynylbutyl carbamate, in a weight ratio of (a):(b) of 100:1 to 2000:1, and(2) propylene glycol or 1,3-butylene glycol.

Abstract: The use of glycine anhydride dimethylol, also known as 1,4-bis(hydroxymethyl)-2,5-piperazinedione, comprising the formula ##STR1## to kill microorganisms present in or on a host substance and to preserve products susceptible to contamination by a variety of microorganisms is disclosed.

Abstract: A water soluble preservative antimicrobial composition for addition to commercial use products at predetermined use levels to provide synergistic biocidal activity against a wide range of fungi and gram-negative and gram-positive bacteria, comprising an active liquid blend of(1) an admixture of(a) one or more methylol compounds selected from the group consisting of N-[1,3-bis (hydroxymethyl)-2,5-dioxo-4-imidazolidinyl]-N,N'-bis (hydroxymethyl) urea; 1,3-dimethylol-5,5-dimethyl hydantoin; sodium hydroxymethyl glycinate; 1,1-methylene bis[3-[3-(hydroxymethyl)-2,5-dioxo-4-imidazolidinyl]urea]; and glycine anhydride dimethylol; and(b) 3-iodo-2-propynylbutyl carbamate, in a weight ratio of (a):(b) of 100:1 to 2000:1, and(2) propylene glycol or 1,3-butylene glycol.

Abstract: A water soluble preservative admixture of biocidal compounds for addition to commercial use compositions at predetermined use levels, and uniformly distributed therein, to provide long-time synergistic biocidal activity against a wide range of fungi and both gram-negative and gram-positive bacteria, which comprises powders of(a) one or more methylol compounds, or their equivalents, and(b) iodopropynyl alcohol, or its ester, carbamate or ether derivative thereof, in a weight ratio of (a):(b) of 100:1 to 2000:1.

Abstract: A water soluble, antimicrobial composition having antifungal activity useful for disinfecting a contact lens comprise (a) polyhexamethylene biguanide and (b) iodopropynylbutyl carbamate, in a weight ratio of (a):(b) of at least 100:1.

Abstract: A water soluble preservative admixture of biocidal compounds for addition to commercial use compositions at predetermined use levels, and uniformly distributed therein, to provide long-time synergistic biocidal activity against a wide range of fungi and both gram-negative and gram-positive bacteria, which comprises powders of(a) one or more methylol compounds, or their equivalents, and(b) iodopropynyl alcohol, or its ester, carbamate or ether derivative thereof,in a weight ratio of (a):(b) of 100:1 to 2000:1.

Abstract: The use of glycine anhydride dimethylol, also known as 1,4-bis(hydroxymethyl)-2,5-piperazinedione, comprising the formula ##STR1## to kill microorganisms present in or on a host substance and to preserve products susceptible to contamination by a variety of microorganisms is disclosed.