Core member for fabrication of shaped plastic
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United States of America Patent
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Jul 3, 1990
Grant Date -
N/A
app pub date -
Jun 24, 1988
filing date -
Jun 24, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention core member is prepared by treatment of non-woven fabric with a coating composition which comprises an emulsion-form curable vinyl polymer, heat-expandable microspheres, and a thiocyanate compound, and this core member is advantageously utilized with use of liquid-form unsaturated polyester-based molding composition which contains a cobalt-containing compound as cure accelerator, wherein color development becomes available when said unsaturated polyester-based liquid composition infiltrates into voids of the core member, due to encounter of the thiocyanate compound with the cobalt-containing compound, thereby infiltration of said liquid composition is monitored by use of the color development.
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