Dispersion of a preformed polymer in a polyol
AssigneeDow Global Technologies LLC
InventorsRichard A. Lundgard, James E. Pate, III, James J. Jakubowski, Robert A. Kirchhoff, Ralph D. Priester, Jr., Werner A. Lidy
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Abstract
The present invention provides a process for preparing a stable dispersion of a preformed polymer in a polyol in a single mixer. A preformed polymer is mixed under sufficient heat and shear to reduce its particle size to a desired size in the presence of a polyol. The present invention also provides stable dispersions of polymers in polyols and polyurethane formulations containing stable dispersions made by the process of the present invention.
Claims14
A process for making a stable dispersion comprising the steps:
- (c) contacting, in a single mixer, a preformed polymer resin, a polyol and, if necessary or desired, a stabilizer under conditions of sufficient heat to melt the preformed polymer, thereby forming a polymer melt, and sufficient shear to form an initial dispersion of the polymer resin in the polyol;
- and
- (d) while under shear, cooling the initial dispersion sufficiently to form a stable dispersion;
- wherein, said polyol is a polyether polyol having a weight-averaged molecular weight of between 500 and 8000.
A composition comprising a stable dispersion of a stabilizer and a preformed high-density or linear low-density polyethylene polymer in a polyol;
- wherein the stabilizer stabilizes the dispersion of preformed high-density or linear low-density polyethylene polymer in the polyol.
Dependencies are inferred from the claim text.