WACKER Chemical Corporation announced presentations at Tape Week 2026 that describe (1) an X‑ray fluorescence (XRF) only method for quantifying extractable silicone in solvent extracts of release coatings, and (2) a radiation‑stable silicone pressure‑sensitive adhesive (PSA) formulation intended for gamma sterilizable medical dressings. The company indicated the XRF method was validated across multiple formulations, laboratories and instruments, and that the RTV‑2 silicone PSA design prioritizes retention of mechanical and functional performance following gamma irradiation.
The XRF method is presented as an alternative to common analytical approaches—inductively coupled plasma optical emission spectroscopy (ICP‑OES), atomic absorption (AA), gas chromatography (GC) and gravimetric analysis—that are reported to carry tradeoffs in cost, safety, accuracy and variability. WACKER notes that many coating operations already deploy XRF to measure silicon or coating weights on release liners; the proposed workflow leverages that existing instrumentation to quantify extractables in solvent extracts. Reported validation parameters include cross‑instrument reproducibility and formulation coverage, which may be relevant to in‑house quality control, inter‑laboratory comparability and specification setting for silicone release coatings used on paper, film and specialty substrates.
WACKER’s DEHESIVE® release coating platform was referenced in the context of coating performance attributes: controlled release force, anchorage to substrates and process stability on high‑speed coating lines. Those process characteristics may be relevant when correlating coating weight or surface concentration metrics obtained by XRF with downstream adhesive performance and liner handling during converting operations. From a manufacturing perspective, adoption of an XRF‑based extractables assay may affect laboratory capital planning, hazard profiles associated with solvent use, and the development of in‑process controls tied to release force specifications.
The silicone PSA research centers on an RTV‑2 formulation engineered to withstand gamma sterilization while remaining solvent‑free. WACKER described retention of structural and functional integrity post‑irradiation; gamma exposure can, in polymer systems, induce chain scission, crosslinking or oxidative reactions that may alter tack, peel strength and cohesive properties, and these mechanisms may be factors in the formulation strategy. The shift from ethylene oxide to gamma sterilization may implicate validation pathways for sterility assurance (e.g., ISO 11137) and biocompatibility/regulatory submissions, and may affect packaging compatibility, shelf‑life testing and sterilization process controls.
Presentations at Tape Week also have potential intellectual property and disclosure considerations. Public disclosure of analytical methods or formulation approaches may have implications for patent prosecution strategies or trade‑secret management, and the availability of validated inter‑laboratory data may influence specification drafting and supplier qualification processes. Such topics may warrant consideration by in‑house counsel, patent advisors and quality/regulatory teams when assessing commercialization and compliance pathways.
For legal and regulatory practitioners, the materials and methods described may be of interest in relation to product specifications, testing protocols, sterilization validation and IP strategy; these matters may warrant further technical review by relevant stakeholders in manufacturing, regulatory affairs and patent counsel.
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