The invention relates to a method to inhibit bacteria from adhering to a submergible surface. The method contacts the submergible surface with an effective amount of at least one sulfamic acid or salt thereof to inhibit bacterial adhesion to the submergible surface. The invention also relates to a method for controlling biofouling of an aqueous system. This method adds an effective amount of at least one sulfamic acid or salt thereof to inhibit bacteria from adhering to a submerged surface within the aqueous system. This method effectively controls biofouling without substantially killing the fouling organisms. The sulfamic acid used in the method of the invention has the formula R.sup.1 R.sup.2 NS(O).sub.2 (OH). In this formula, R.sup.1 and R.sup.2 are independently a hydrogen, a C.sub.4 -C.sub.20 alkyl group or a cyclohexyl group. However, R.sup.1 and R.sup.2 are not both hydrogen. Alternatively, R.sup.1 and R.sup.2, together with the N, may also form a 5-8 membered heterocyclic ring having the formula: ##STR1## In the heterocyclic ring, X is O, NH, or CH.sub.2. The salt of sulfamic acid can be an acid salt or quaternized sulfamic acid salt. The present invention also relates to a composition containing sulfamic acids or salts thereof useable in the above methods. The compositions comprise at least one sulfamic acid or salt thereof in an amount effective to inhibit bacteria from adhering to submergible or submerged surfaces.
本发明涉及一种抑制细菌附着于浸没表面的方法。该方法将浸没表面与至少一种磺酰胺酸或其盐的有效量接触,以抑制细菌附着于浸没表面。本发明还涉及一种控制
水系
生物污垢的方法。该方法添加至少一种磺酰胺酸或其盐的有效量,以抑制
水系中浸没表面的细菌附着。该方法有效地控制
生物污垢,而不会实质性地杀死污垢
生物。本发明中使用的磺酰胺酸的
化学式为R.sup.1 R.sup.2 NS(O).sub.2 (OH)。在该
化学式中,R.sup.1和R.sup.2分别是氢、C.sub.4-C.sub.20烷基或环己基。但是,R.sup.1和R.sup.2不同时为氢。或者,R.sup.1和R.sup.2与N一起也可以形成具有以下
化学式的5-8元杂环环:##STR1## 在杂环中,X为O、NH或CH.sub.2。磺酰胺酸盐可以是酸性盐或季
铵化磺酰胺盐。本发明还涉及一种含有磺酰胺酸或其盐的组合物,可用于上述方法。该组合物包含至少一种磺酰胺酸或其盐,在有效量下能够抑制细菌附着于浸没或浸没表面。