FIELD: chemical engineering. SUBSTANCE: method of preparing hollow microglobes by way of pulverizing homogenized composition of phenol-formaldehyde resin, a blowing agent, and a surfactant into a heated gaseous medium, followed by hardening and drying resultant microglobes, is distinguished with that, when being pulverized, composition is characterized with density 0.4-0.9 g/cu.cm and size of gas bubbles therein 5-140 mcm. EFFECT: improved performance characteristics.
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Authors
Dates
1997-01-20—Published
1979-01-02—Filed