Polymer/CaCO.sub.3 composite core/sheath particulates and hollow

Details Polymer/CaCO.sub.3 composite core/sheath particulates and hollow Polymer/CaCO.sub.3 composite core/sheath particulates and hollow

1998-04-06

2000-07-25

Le, Hoa T.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Including a second component containing structurally defined...

428403, 428407, B32B 516

Patent

active

060934875

ABSTRACT:
Composite core/sheath particulates comprising an organic polymer core at least partly coated with calcium carbonate, these core/sheath particulates having a mean particle size not exceeding 5 .mu.m, well suited for reinforcing plastic/elastomer substrates, are conveniently converted, e.g., via calcination, into hollow calcium carbonate microbeads which comprise CaCO.sub.3 shells having a mean particle size not exceeding 5 .mu.m; such hollow microbeads are themselves well suited for enhancing the low-temperature flexibility of elastomer substrates, notably vehicle tires.

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