Wacker Polymers binders based on renewable resources certified
To do so, the company uses acetic acid generated as a byproduct in the woodworking industry. TÜV SÜD, the international technical inspectorate and certification body, has certified Wacker’s biomass balance method as meeting its international CMS 71 standard. Independent certification assures customers that Wacker has replaced the required quantities of fossil resources with an equivalent amount of renewables for its biomass-balanced products right at the start of production. The company markets this innovative product class under its new Vinneco line, encompassing all its polymer products based on renewables.
Sustainability begins right at the raw-material stage
“More and more customers in construction, paints, adhesives, textiles and the paper industry value the use of renewable raw materials,” says Dr. Christoph Riemer, head of the Consumer & Industrial Polymers business unit at Wacker Polymers. He added, “We can now meet that wish with our vinyl acetate-ethylene copolymers. After all, our approach to sustainability begins right at the raw-material stage.” In the case of the new polymer class, the acetic acid comes from the woodworking industry. The wood originates from sustainably managed forests that are PEFC certified. The bio-based acetic acid meets WACKER’s quality standards and is characterized by very high purity, very good color compatibility and very low water content. As a result, the bio-acetic acid’s chemical and physical behavior is identical with that of conventional, fossil acetic acid. What’s more, mixing both types of acetic acid does not affect the end-product’s properties.
All these aspects favor the biomass balance method that the company uses to calculate how much VAE dispersion was produced from renewable and, thus, non-fossil raw materials. The recently issued certificates verify that Wacker’s mass balance method for VAE production meets the criteria of TÜV SÜD’s CMS 71 standard on the traceability of renewable resources. For the moment, renewable resources account for a limited share of Wacker’s global output of VAE dispersions. All the same, the biomass balance approach is ideal for raising that share continuously. Alongside VAE dispersions, the chemical company offers vinyl acetate homopolymer dispersions and vinyl acetate-based solid resins as biomass-balanced grades.