Rotocasting process for producing rubbery reinforced articles
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United States of America Patent
Stats
-
Mar 31, 1981
Grant Date -
N/A
app pub date -
Dec 3, 1979
filing date -
Dec 3, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A process is provided for making reinforced rubbery sport and play balls by rotational casting, in a mold lined with a nonwoven fabric, a liquid polymer composition containing an epoxy resin, a liquid carboxyl-terminated polymer, an amine, a dihydric compound, and a plasticizer. The sections of nonwoven fabric in the mold are preshrunk and sealed together by means of an amine-terminated liquid polymer. The resultant sport and play balls have good dimensional stability and the desired flex and tear properties.
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