Patent ID: 8829055

Claim:
A method of inhibiting biofilm formation, which method comprises: contacting a biofilm formation inhibitor composition with microorganisms, wherein the biofilm formation inhibitor composition comprises the following component (A): (A) at least one or more selected from compounds represented by Formula (1) and Formula (2) or a salt thereof: wherein R 1 and R 2 , which are identical or different, each represents an alkyl group or an alkenyl group, which is a straight chain or branched chain having 8 to 14 carbon atoms; EO represents an ethyleneoxy group; p represents an integer from 1 to 5; and m and n are each an average number of added moles, with m+n being a number from 2 to 30; and (B) a surfactant; wherein the weight ratio of the component (A) and the component (B), (A)/(B), is not more than 2.