Modification of vinyl ester resins with reactive liquid polymers
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United States of America Patent
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Feb 28, 1995
Issued Date -
N/A
app pub date -
Jan 6, 1993
filing date -
Apr 27, 1990
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Expired
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Abstract
Vinyl ester resins of the type already having reactive liquid polymers reacted into the backbone of the resins, are cured in the presence of a reactive liquid polymer additive admixed with the prereacted vinyl ester resin. Heating of the system during cure causes the reactive liquid polymer additive to miscibilize with the vinyl ester base resin. The vinyl ester resin modified in the manner described above shows a significant enhancement in toughness as measured by fracture energy over unmodified counterparts or counterparts modified by known methods of adduction or admixing alone.
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