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US 2002/0165283 A1Published application
Preservative blends containing quaternary ammonium compounds
AssigneeLonza Ltd.
InventorPatrick Jay Lutz
Life of this patent
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Abstract
The present invention provides a biocidal composition comprising a synergistic mixture of certain quaternary ammonium biocides and one or more ketone acids, aromatic carboxylic acids, salts thereof, or mixtures thereof.
Claims50
A composition comprising:
- (a) (i) a quaternary ammonium biocide having the formula N+R1R2R3R4X−,
- (ii) a polymeric quaternary ammonium biocide, or
- (iii) a mixture thereof;
- and
- (b) (i) a ketone acid or salt thereof,
- (ii) an aromatic carboxylic acid or a salt thereof, or
- (iii) a mixture thereof,
- wherein R1 and R2 are independently unsubstituted or hydroxy substituted linear or branched C1-C4 alkyl, —(CH2CH2O)mCH2CH2OH, or —(CH2CHCH3O)mCH2CHCH3OH where m is 1 to 10;
- R3 is a substituted or unsubstituted benzyl, ethylbenzyl, methylnaphthyl, or linear or branched C1-C22 alkyl;
- R4 is —R5(O)n(C6H5)R6 where n is 0 or 1;
- R5 is a substituted or unsubstituted C1-C8 alkyl or C1-C8 alkoxyalkyl;
- R6 is hydrogen or a substituted or unsubstituted, linear or branched C1-C12 alkyl;
- and X−is an anoin.
10 more elements
An antimicrobial composition comprising a synergistic mixture of:
- (a) dehydroacetic acid or a salt thereof;
- and
- (b) benzethonium chloride.
An antimicrobial composition comprising a synergistic mixture of:
- (a) salicylic acid or a salt thereof;
- and
- (b) benzethonium chloride.
A preservative formulation comprising a synergistic mixture of:
- (a) dehydroacetic acid or a salt thereof;
- (b) a benzethonium salt;
- and
- (c) salicylic acid or a salt thereof.
1 more element
Dependencies are inferred from the claim text.