Recyclate polyol dispersion with improved phase stability

A method for stabilizing a recyclate polyol dispersion, the method comprising:

• combining the recyclate polyol dispersion with fumed silica particles, the fumed silica particles having a methanol wettability of 10% to 60% and a BET surface area of 75 m2/g to 500 m2/g, to produce a stabilized recyclate polyol dispersion containing 0.1 to 3% by weight of the fumed silica particles based on the combined weights of the recyclate polyol dispersion and the fumed silica particles.

A method for making a stabilized recyclate polyol dispersion, the method comprising:

• a) in one or more steps, combining a polyurethane and/or polyurethane-urea with virgin polyol and one or more of (i) an imide precursor, (ii) a glycidyl ether, and (iii) an alkylene carbonate to form a mixture and subjecting the resulting mixture to chemolysis conditions to produce a recyclate polyol dispersion having i) a liquid phase that comprises recyclate polyol formed by chemolysis of the polyurethane and/or polyurethane-urea and ii) dispersed in the liquid phase, solid particles containing one or more urethane, urea, and/or imide groups formed by chemolysis of the solid polyurethane and/or polyurethane-urea;
• and
• b) combining the recyclate polyol dispersion produced in step a) with fumed silica particles, the fumed silica particles having a methanol wettability of 10% to 60% and a BET surface area of at 75 m2/g to 500 m2/g, to disperse the fumed silica within the recyclate polyol dispersion and produce a stabilized recyclate polyol dispersion containing 0.1 to 3% by weight of the fumed silica particles based on the combined weights of the recyclate polyol dispersion formed in step a) and the fumed silica particles.