METHOD FOR FORMING A SPRAYABLE NONISOCYANATE POLYMER FOAM COMPOSITION

摘要

Provided is a method for the spray application of a nonisocyanate polymer foam composition. The method comprises the steps of supplying dosed quantities of the components of the nonisocyanate polymer composition to the mixing chamber where the components react with each other and form a foamable nonisocyanate polymer composition, transferring the foamable nonisocyanate polymer composition to the intermediate chamber of a foam application apparatus and continuously moving the foamable nonisocyanate polymer composition through the intermediate chamber while constantly controlling the parameters of the foamable nonisocyanate polymer composition in the intermediate chamber for providing conditions most optimal for the spray application onto the substrate.

主权项

1. A method for forming a sprayable nonisocyanate foam composition for spray application comprising:
providing a foam spraying apparatus comprising a mixing chamber, at least a first material loading device for dosed input of a part (A) material and a second loading material device for dosed input of a part (B) material to the mixing chamber, an intermediate chamber connected to the mixing chamber, a heater for heating the content of the intermediate chamber, a control unit comprising a temperature sensor for measuring temperature in the intermediate chamber, a differential thermocouple for maintaining the temperature in the intermediate chamber at a constant level, and a discharge nozzle for discharging the product from the intermediate chamber; supplying dosed quantities of the part (A) material and part (B) material of the nonisocyanate polymer composition to the mixing chamber, the components being mutually reactive; uniformly mixing the part (A) material and part (B) material and starting a reaction between these materials for forming a foamable nonisocyanate polymer composition; creating quasiadiabatic conditions in the intermediate chamber, transferring the foamable nonisocyanate polymer composition to the intermediate chamber, and continuously moving the foamable nonisocyanate polymer composition through the intermediate chamber at a predetermined flow rate; controlling the temperature of the foamable nonisocyanate polymer composition in the intermediate chamber with use of the temperature sensor and the differential thermocouple so as to provide parameters of and conditions for the formation of a foamable nonisocyanate composition most optimal for spray application; and spraying the foamable nonisocyanate polymer composition from the intermediate chamber through the discharge nozzle onto the substrate.