Composite synergistic bactericidal and preservative agent for organic foaming agents

The invention relates to a composite synergistic bactericidal and preservative agent for organic foaming agents, which is prepared from 2-methylisothiazolinone and/or 1,2 benzisothiazolinone (BIT) and/or dichloroethylene based salicylamide, sodium pyrithione and/or sodium hydroxymethylglycinate, sodium dimethyldithiocarbamate and/or o-phenylphenol, phenethyl alcohol and/or phenylcarbinol, a regulator, a solvent and water. According to the invention, different bactericidal and preservative agents with various complementary bactericidal spectrums are composited, so that the products have the advantages of reasonable formula, comprehensive protection, strong synergism, good bactericidal and preservative effects and the like, and have a good application effect when being used in aqueous organic foaming agents containing large amounts of proteins and organic polysaccharides.