ANTIMICROBIALS | ADDITIVES
Category 1b,” the company says. The Commission’s ruling applies only to the EU
market. BioCote says ZnPT is still used throughout the rest of the world and says in the US several com- panies include ZnPT as the main active ingredient in a wide range of products, including shampoo and wood preservatives. Nevertheless, the company says it has decided to permanently cease supply of ZnPT based additives for use in treated articles across its entire global customer base. Arxada, previously Lonza Specialty Ingredients, is a significant supplier of zinc pyrithione and remains committed to the product. “ZnPT is one of the most effective and versatile antimicrobial additives used by polyolefins processors. Arxada continues to support ZnPT for use in polymer and textile applications and continues to significantly invest in the chemistry,” the company says. “With the updated classification in Europe, a
major project has been initiated by Arxada’s regula- tory affairs team to secure continued compliance with the Biocidal Products Regulation (BPR, Product Type 9). The objective is to show that conditions for Art. 5.2 approval (under derogation) are met. This approval will ensure that our valued customers can continue to use ZnPT in preservation applications today and in the future,” it adds.
PVC protection Biocides are particularly important in flexible PVC, since the plasticiser component can be especially susceptible to microbial attack. Valtris Specialty Chemicals offers a full line of biocidal products for PVC applications under the Intercide and Micro- Chek tradenames. Phil Clegg, Biocides Business
Manager Europe & Asia Pacific, says one key trend the company has seen over the past few years in the plastics market in several geographic regions is the move away from arsenic-based biocides, such as oxybisphenoxarsine (OBPA). Neither OBPA, nor PVC articles containing OBPA, are available in the EU since the biocide has not been registered. As a result, isothiazolinone alternatives are dominant, says Clegg (Valtris is a major player in dichlorooctyliso- thiazolinone, DCOIT, and octylisothiazolinone, OIT). Approval of Active Substances and Biocidal
Products via the European Chemicals Agency (ECHA) is a lengthy process and, in recent years, there have been some delays in registrations, according to Clegg. “For the products Valtris sells into plastics applications, we expected to see active substance registrations completed by now, and to be in the process of applying for Biocidal Product registrations. As it is, there have been general delays at ECHA level due to volume of work, plus the known delays due to the pandemic.”
Above: Cupron, which has partnered with US
compounder Techmer PM, supplies a powder-form oxidised copper that is claimed to impart durable antimicrobial and anti-odour properties
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info@xindacorp.com
IMAGE: BUSINESS WIRE
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