Polyurethanes made with polymer/polyols prepared via preformed s

Details Polyurethanes made with polymer/polyols prepared via preformed s Polyurethanes made with polymer/polyols prepared via preformed s

1980-08-14

1982-09-21

Cockeram, H. S.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

521904, 521914, 528 75, 524881, C08G 1814, C08G 1863

Patent

active

043507808

ABSTRACT:
This invention relates to polymer/polyols prepared from an ethylenically unsaturated monomer or a mixture of such monomers and characterized by the utilization, in the preparation thereof, of certain preformed stabilizers tailored to the monomer system employed, a method of preparing such polymer/polyols, and to the preformed stabilizers themselves. In general, the stabilizer, compatible with the polyol portion of the polymer/polyol, comprises a copolymer of an anchor portion consisting of an ethylenically unsaturated monomer or mixture of such monomers and a solvatable portion consisting of a propylene oxide polymer having a number average molecular weight of at least 800. The resulting polymer/polyols are stable, fluid, essentially free from scrap and seeds as produced and contain relatively small polymer particles. In accordance with one aspect of this invention, the polymer particles are essentially spherical in shape.

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Saunders et al. Polyurethanes Part II, Interscience (N.Y.) 1964, pp. 84-94.
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