news Technical Specifications for Dimensional Stability Control of PC41 Catalyst in the Production of Polyurethane Insulation Strips for Energy-saving Building Doors and Windows Technical specifications for dimensional stability control of PC41 catalyst in the production of pol... 03/1920Technical Specifications for Dimensional Stability Control of PC41 Catalyst in the Production of Polyurethane Insulation Strips for Energy-saving Building Doors and Windows