Process for preparing a thermo-expandable microspheres

Details Process for preparing a thermo-expandable microspheres Process for preparing a thermo-expandable microspheres

1980-06-10

1981-09-01

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521 55, 521 56, 521145, 521149, C08J 936

Patent

active

042873088

ABSTRACT:
Microspheres, the blowing agent of which is microencapsulated with a thermoplastics having an acrylonitrile moiety, are prepared. Acrylonitrile monomer remaining therein is eliminated from the microspheres by cyanoethylation. The microspheres have an excellent solvent-resistance and an expansibility hardly changeable with time but no harmfulness attributed to the acrylonitrile monomer.

REFERENCES:
patent: 3615972 (1971-10-01), Morehouse, Jr. et al.

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