2. The Impact Goes Beyond Blowing Agents: Rigid Foam Systems Will Re-segment
HCFC-141b has historically been widely used in PU rigid foam, mainly because of its foaming effect, thermal-insulation performance, process adaptability and cost advantages. However, a rigid-foam system usually consists of premixed polyols, isocyanates, blowing agents, catalysts, flame retardants and surfactants. Once the blowing agent changes, cell structure, thermal conductivity, dimensional stability, flame-retardant performance, construction window, spray adhesion and curing speed may all change accordingly.
Therefore, companies can hardly complete the upgrade by simply replacing HCFC-141b with another blowing agent. They need to readjust formulation systems and construction parameters. Current substitution routes available to the industry include water-blown systems, hydrocarbon blowing agents, HFCs and HFOs. These routes differ in environmental attributes, cost, equipment requirements, safety management and performance stability.
Water-blown systems and some hydrocarbon routes have relative cost advantages, but they place higher demands on formulations, equipment and on-site safety management. Low-GWP routes such as HFOs have stronger environmental attributes but higher costs, making them more suitable in the near term for customers with higher requirements for performance, certification and export compliance. Although HFCs are not ODS, they have already entered a longer-term greenhouse-gas control framework, so companies cannot evaluate substitution routes based only on immediate cost.
This also means the impact of the ban may not necessarily appear as a sudden increase in rigid-foam demand. It is more likely to show up as a re-segmentation of the market structure. Companies with formulation R&D capabilities, experience applying substitute blowing agents, testing capabilities and compliance-document management will be better positioned to take high-standard orders. Smaller companies that compete mainly on low prices and low compliance costs may face greater operating pressure.
From a cost perspective, substitute blowing agents, formulation validation, equipment adaptation, construction training and testing certification will all raise overall costs. However, this cost pressure may not be fully passed downstream. Demand for building insulation, cold-storage construction, insulated pipelines and some industrial insulation is still affected by real estate, infrastructure schedules, investment appetite and project-payment cycles, and end customers remain price-sensitive.
A more realistic judgment is therefore that the ban itself may not significantly expand total rigid-foam demand, but it will change order structure and profit distribution. Products that are highly compliant, high-performing and traceable may gain stronger bargaining power, while low-priced, opaque products that cannot prove the source of their blowing agents may gradually be excluded from key projects, branded customers and standardized construction scenarios. Environmental regulation will not create demand out of thin air, but it will raise the threshold for entering order systems.