Process for incorporating powders in viscous fluids

Details Process for incorporating powders in viscous fluids Process for incorporating powders in viscous fluids

1986-02-04

1987-09-08

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521 54, 521 88, 521117, 521137, C08J 940

Patent

active

046924701

ABSTRACT:
In order to overcome the problems encountered in attempting to mix finely divided organic polymer materials into viscous polyol because of accompanying air entrainment, the polymer material is pretreated with a volatile liquid halocarbon or liquid hydrocarbon in an amount at least sufficient to wet the surfaces of the polymer particles. The halocarbon or hydrocarbon is one preferably otherwise employed as a blowing agent for the preparation of foamed resin polymers such as a polyurethane; particularly methylene chloride or a fluorocarbon (e.g. monofluorotrichloromethane). In accordance with an alternative embodiment the volatile treating liquid may be first mixed with the viscous polyol before addition of the ground material therein.

REFERENCES:
patent: 3251916 (1966-05-01), Newnhans et al.
patent: 3256218 (1966-06-01), Knox
patent: 3300421 (1967-01-01), Merrimau et al.
patent: 3509079 (1970-04-01), Hyde et al.
patent: 3594335 (1971-07-01), Schultz et al.
patent: 3772219 (1973-11-01), Schwarz
patent: 4331726 (1982-05-01), Cleary
patent: 4480053 (1984-10-01), Sherno

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