Sizing agent for reinforcement fibers, synthetic fiber strand, and fiber-reinforced composite
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United States of America Patent
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Jun 30, 2015
Grant Date -
May 16, 2013
app pub date -
Jul 27, 2011
filing date -
Aug 5, 2010
priority date (Note) -
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Abstract
A sizing agent for reinforcement fibers which imparts good bonding performance to a reinforcement fiber is used to reinforce thermoplastic matrix resin, and provide a synthetic fiber strand applied with the sizing agent and a fiber-reinforced composite reinforced with the synthetic fiber strand. The sizing agent essentially contains a neutralization product of a modified polypropylene resin and an amine compound having at least two hydroxyl groups or amino groups in the molecule, and the nonvolatile component of the sizing agent exhibits an endothermic heat of fusion not higher than 50 J/g in determination with a differential scanning calorimeter (DSC).
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