Concentrates of modifying agents in polymers
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United States of America Patent
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-
Dec 22, 1992
Grant Date -
N/A
app pub date -
Aug 30, 1990
filing date -
Sep 4, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A concentrate comprising a carrier polymer and at least 30%, by weight of the carrier polymer, of at least one modifying agent for a thermoplastic polymer is disclosed. The carrier polymer is a polymer of alpha-olefins having a heat of crystallization of less than 70 J/g and, if the copolymer is an ethylene/vinyl acetate copolymer, containing at least 18% by weight of vinyl acetate comonomer. The modifying agent is absorbed into the carrier polymer. In embodiments, the modifying agent is a polymerizable monomer. The concentrates provide a versatile method of addition of modifying agents into thermoplastic polymers.
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