ISO 11909:2025 pdf download,Binders for paints and varnishes — Polyisocyanate resins — General methods of test.
ISO 11909:2025 provides general test methods for polyisocyanate resins (and solutions of polyisocyanate resins) that are used as binders in paints, varnishes, and related coating products. The standard’s main goal is to define consistent, standardized laboratory procedures so that manufacturers and testing labs can measure key properties of these resin binders in a comparable way. It focuses on the “general methods” level—i.e., baseline analytical approaches and testing workflows that apply broadly to polyisocyanate binder materials—rather than application-specific coating performance. By standardizing how samples are handled and how tests are carried out and interpreted, ISO 11909:2025 supports quality control, formulation development, and specification compliance for coating industries that rely on polyisocyanate chemistry.