Anti-bacterials and Biocides

Many chemicals have anti-microbial properties, such as quaternary ammonium salts, but few are suitable for use in plastics, requiring low cost, compatibility, thermal stability during processing, environmental stability, and safe and easy handling. Microbial agents must migrate to the surface of the plastic and prevent bacterial growth. 

Additives for preservation of plastics will, however, undergo a significant shift in consumption patterns, away from arsenic-based products (which currently account for over 70% of the market). The market leader is OBPA (10,10 -oxybisphenox arsine), which, although seen as the most efficient and cost-effective preservative for plastics and accepted by the Environmental Protection Agency as able to be used safely, is regarded as dangerous by consumers. 

However, the total US market is estimated to be worth only about US 30 million, and manufacturers are working more on adaptation of preservation additives used in other industries. It is estimated that the overall market will 

Good anti-mildew and algicide properties are claimed for a non-arsenic-based anti-microbial agent, Amical from Argus Chemical, which is also non-irritating. It is approved by the US EPA for plastics use. Low levels of dosage in plasticized PVC, polyurethane, rubber, and other products prevent embrittlement and premature decay. 

Akcros Intercide ABF-2711 is a special formulation of OBPA biocide - 2% solution in di-(heptyl. nonyl. undecyl) phthalate plasticizer - for PVC pool- and pond-liners, tarpaulins, and marine upholstery. 

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