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Limits and challenges of today’s technology in the coatings industry
As manufacturers push for lower VOCs, safer chemistries, and improved sustainability, coatings technology is approaching the practical limits of both formulation and processing. Jigarkumar Patel, senior R&D technical manager at The Sherwin Williams Company, explores how regulatory demands and operational realities intersect on the plant floor. Reducing VOC, for example, can fundamentally change a coating’s drying profile.
Modern coatings are under mounting pressure to deliver lower VOC, safer chemistries, and improved sustainability yet still meet demanding performance and productivity expectations. In many cases, the constraints are no longer just material choices but the physical and operational limits of existing customer processes. Reducing VOC, for example, can fundamentally change a coating’s drying profile. Many industrial facilities operate with fixed oven lengths, limited airflow, or tightly controlled line speeds. When a reformulated low-VOC coating requires a different evaporation rate or higher temperature to achieve the same hardness and handling properties, the customer may simply lack the process flexibility to accommodate those changes. This creates a gap between what is theoretically sustainable and what is practically adoptable.
Additive limitations and performance trade-offs
Additives pose a second major constraint. The industry has made progress in identifying alternatives to legacy materials, but true one-to-one replacements remain rare. New dispersants may not provide the same pigment-wetting robustness, especially under high-shear grind conditions or with complex inorganic pigment blends. Defoamers often behave differently in lower-VOC or lower-surface-tension systems, leading to persistent micro-foam or crater-forming over-deflection. Likewise, substitutes for traditional slip and surface-control additives can struggle to match historical benchmarks for block resistance, slip, or mar and scratch performance properties that are critical in industrial environments where parts are handled, stacked, or packaged quickly.
When these gaps appear, formulation chemists must be exceptionally creative. Achieving performance parity often requires not one adjustment, but a cascade of them, altering resin balance, rethinking the solvent package, modifying particle size distribution, or introducing synergistic additive combinations. In many cases, the solution is not purely formulation-based; it also requires changes in mixing practice, film build, airflow, flash time, or cure conditions. This interplay between formulation innovation and process adaptation is powerful but time-consuming, and it highlights the complexity behind seemingly straightforward sustainability targets.
Beyond incremental improvement
These challenges reveal the limits of incremental improvement. Modern coatings operate within narrow windows defined by application equipment, substrate diversity, and productivity pressures. Pushing further will require not only better building blocks, smarter polymers, more efficient crosslinkers, and next-generation additives, but also better system design across the entire value chain. Progress is being made, but achieving meaningful leaps will require collaboration, realistic expectations, and a shared understanding of where technology can stretch… and where it reaches its inherent limits.
