Long-lasting antimicrobial reaction product of allantoin and formaldehyde containing a low level of free formaldehyde

摘要

This invention relates to a reaction product of allantoin and formaldehyde made in a molar ratio of about 1:2.75–1:3.25, preferably 1:3, respectively, preferably under controlled pH (5.0 to 7.0) and temperature (40° to 85° C., preferably 50–60° C.) conditions, which product contains free formaldehyde (0.1%), and methylene diol of about 580–1385 ppm, preferably at a pH of 7.2, with advantageous long-lasting, anti-microbial properties, particularly against the organism B. cepacia, and in combination products with parabens and iodopropynyl butyl carbamate (IPBC).