Preparation of solid polyurethane particles

Details Preparation of solid polyurethane particles Preparation of solid polyurethane particles

1982-08-31

1983-09-06

Cockeram, H. S.

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

Synthetic resins

From reactant having at least one -n=c=x group as well as...

528 76, 528904, C08G 1848, C08G 1810

Patent

active

044030835

ABSTRACT:
This invention relates to novel hydrophilic, crosslinked, polyurea-urethane, solid, discrete particles formed by adding in droplet form a hydrophilic prepolymer comprising an isocyanate-capped polyol or mixtures thereof wherein said polyol or mixture of polyols has a reaction functionality greater than two, the total of said polyol present having an ethylene oxide content of at least 40 weight percent, before capping to a large excess of a stirred aqueous reactant. The resultant solid particles can be molded into various shapes as desired or used for coating or adhesive applications.

REFERENCES:
patent: 3402149 (1968-09-01), Walters
patent: 3655627 (1972-04-01), Hutzler
patent: 3822238 (1974-07-01), Blair et al.
patent: 3850880 (1974-11-01), Hakanson et al.
patent: 3953406 (1976-04-01), Marsh
patent: 4137200 (1979-01-01), Wood et al.
patent: 4209605 (1980-06-01), Hoy et al.

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