Compositions contenant des 2-bromo-acéto-phénones monosubstitués, et procédés pour l'utilisation de ces corps

摘要

Compositions which inhibit the growth and proliferation of microoganisms, especially which inhibit the formation of slime in aqueous liquids, comprise (A) at least one monosubstituted 2-bromoacetophenone of formula wherein n and n1 each represent 0 or 1, and when n is 0, n1 is 0, the 2-bromoacetophenone being such that, when n is 1 and n1 is 0, the point of attachment of the CH3O group is at any one of the positions designated as ortho, meta and para and, when, n and n1 are each 0 or when n and n1 are each 1, the point of attachment of the OH or CH3CO2 group is at either of the positions designated as meta and para; to gether with (B) either (i) at least one glyco ether having the formula H(OC3H6)xOCyH2y + 1 wherein x and y are integers of from 1 to 3 and 1 to 4 respectively, or (ii) at least one ester having the formula wherein x1 is 1 or 2 and R11 is a straight or branched chain alkyl radical or an alkoxy substituted straight or branched chain alkyl radical containing from 1 to 6 carbon atoms, and/or (c) at least one dispersant having the formula R1-O-(RC2H3-O)2H wherein z is an integer of from 1 to 20, R is hydrogen or methyl, and R1 is a straight or branched chain alkyl-substituted phenyl radical or a straight or branched chain alkyl radical, wherein the alkyl radical contains from 6 to 20 carbon atoms, the composition containing component (A) in a proportion of from 5 to 50%, component (B), when present in a proportion up to 95%, and component (C), when present, in a proportion up to 95%, all the percentages being by weight of the total (A) + (B) + (C) content of the composition.ALSO:A composition suitable for inhibiting the growth and protiheration of microorganisms comprises (a) at least one monosubstituted 2-bromoacetophenone having the formula: wherein n and n1 each represent 0 or 1, and when n is 0, n1 is 0, the 2-bromoacetophenone being such that, when n is 1 and n1 is 0, the point of attachment of the CH3O group is at any one of the positions designated as ortho, meta and para and, when n and n1 are each 0 or when n and n1 are each 1, the point of attachment of the OH or CH3 CO2 group is at either of the positions designated as meta and para; together with (b) either (i) at least one glycol ether having the formula: H(OC3H6)xOCyH2y + 1 wherein x and y are integers of from 1 to 3 and 1 to 4 respectively, or (ii) at least one ester having the formula: wherein x1 is 1 or 2 and R11 is a straight or branched chain alkyl radical or an alkoxy substituted straight or branched chain alkyl radical containing from 1 to 6 carbon atoms, and/or (c) at least one dispersant having the formula: R1-O-(RC2H3-O)2H wherein z is an integer of from 1 to 20, R is hydrogen or methyl, and R1 is a straight or branched chain alkyl-substituted phenyl radical or a straight or branched chain alkyl radical, wherein the alkyl radical contains from 6 to 20 carbon atoms, the composition containing component (A) in a proportion of from 5 to 50%, component (B), when present in a proportion up to 95%, and component (C), when present, in a proportion up to 95%, all the percentages being by weight of the total (A) + (B) + (C) content of the composition.ALSO:Coloured paper produced by incorporating acidic or basic dyes has its colour intensified by incorporating therein a composition which comprises (A) at least one monosubstituted 2-bromoacetophenone having the formula wherein n and n1 each represent 0 or 1, and when n is 0, n1 is 0, there 2-bromoacetophenone being such that, when n is 1 and n1 is 0, the point of attachment of the CH3O group is at any one of the positions designated as ortho, meta and para and, when, n and n1 are each 0 or when n and n1 are each 1, the point of attachment of the OH or CH3 CO2 group is at either of the positions designated as meta and para; together with (B) either (i) at least one glycol ether having the formula wherein x and y are integers of from 1 to 3 and 1 to 4 respectively, or (ii) at least one ester having the formula wherein x1 is 1 or 2 and R11 is a straight or branched chain alkyl radical or an alkoxy substituted straight or branched chain alkyl radical containing from 1 to 6 carbon atoms, and/or (c) at least one dispersant having the formula wherein z is an integer of from 1 to 20, R is hydrogen or methyl, and R1 is a straight or branched chain alkyl-substituted phenyl radical or a straight or branched chain alkyl radical, wherein the alkyl radical contains from 6 to 20 carbon atoms, the composition containing component (A) in a proportion of from 5 to 50%, component (B), when present in a proportion up to 95%, and component (C), when present, in a proportion up to 95%, all the percentages being by weight of the total (A) + (B) + (C) content of the composition.