Sizing agent for reinforcement fibers, synthetic fiber strand, and fiber-reinforced composite
AssigneeMatsumoto Yushi-Seiyaku Co., Ltd.
InventorsYoshio Hashimoto, Yusuke Shimizu, Mikio Nakagawa
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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).
Claims17
A sizing agent for a reinforcement fiber used for reinforcing a thermoplastic matrix resin, the sizing agent comprising
- a neutralization product of a modified polypropylene resin that exhibits an endothermic heat of fusion not higher than 70 J/g in determination with a differential scanning calorimeter (DSC) and an amine compound having at least two hydroxyl groups or at least two amino groups in the molecule,
- wherein 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), and
- the amine compound is a chemical compound represented by the following chemical formula (1) and/or chemical formula (2):
- R1N(CH2CH2OH)2 (1)
- where R1 is a hydrogen atom, —CH2CH2OH or C1-C5 aliphatic hydrocarbon group;
- NH2R2NH(CH2CH2OH) (2)
- where R2 is a C1-C2 aliphatic hydrocarbon group.
A sizing agent for a reinforcement fiber used for reinforcing a thermoplastic matrix resin, the sizing agent comprising
- a neutralization product of a modified polypropylene resin and an amine compound having at least two hydroxyl groups or at least two amino groups in the molecule, and
- at least one polymer component (A) selected from the group consisting of aromatic polyester resins and aromatic polyester polyurethane resins in an amount ranging from 5 to 80 weight percent to the whole amount of the nonvolatile component of the sizing agent,
- wherein 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).
Dependencies are inferred from the claim text.