EPOXY RESIN COMPOSITIONS FOR FIBER-REINFORCED COMPOSITE MATERIALS, PROCESS FOR PRODUCTION OF THE MATERIALS AND FIBER-REINFORCED COMPOSITE MATERIALS
申请人:TORAY INDUSTRIES, INC.
公开号:EP1454936A1
公开(公告)日:2004-09-08
The present invention relates to an epoxy resin composition for fiber reinforced composite material comprising the following components (1) - (3) as essential components, their mixing ratios meeting the following conditions (I) - (IV), and component (3) being dissolved homogeneously:
component (1): epoxy resin that is liquid at room temperature,
component (2): aromatic polyamine that is liquid at room temperature,
component (3): diaminodiphenylsulfone,
condition (I): The proportion of component (1) relative to the entire epoxy resin in the composition is 60-100 wt%,
condition (II): The sum of the proportions of components (2) and (3) relative to the entire polyamine in the composition is 70-100 wt%,
condition (III): The proportion of component (3) relative to the entire polyamine in the composition is 25-60 wt%, and
condition (IV): The stoichiometric ratio of the entire polyamine to the entire epoxy resin in the composition is 0.7-1.3.
Another embodiment of the invention relates to an epoxy resin composition for fiber reinforced composite material that contains at least the following components (4) - (6), forms a cured product with a theoretical molecular weight between crosslinking points in the range of 250-350 g/mol, and has an initial viscosity at 80°C of 1-500 MPa·s:
(4): aromatic epoxy resin with tri- or higher functionality,
(5): aromatic epoxy resin with di- or higher and lower than tri-functionality, and
(6): aromatic polyamine,
the molecular weight between crosslinking points being defined as the weight of the entire cured epoxy resin divided by the number of crosslinking points contained in the entire cured epoxy resin. The invention also relates to an epoxy resin composition for fiber reinforced composite material that consists of the following components (7) and (8):
(7) a polyglycidyl ether of phenol aralkyl resin as represented by the following formula:
where R1, R2, R3 and R4 denote a hydrogen atom, an alkyl group having 1-8 carbon atoms, or a halogen atom, and m and n denote an integer of 1-4 and a real number of 0 or more and less than 1, respectively, and
(8) polyamine.
With the constitution described above, the present invention can provide a liquid epoxy resin composition for low cost production of high performance fiber reinforced composite material, that has a low viscosity at relatively low temperatures, and that after being cured, the cured product is high in glass transition temperature, elastic modulus and toughness while being small in the glass temperature decrease caused by water absorption and also small in the coefficient of linear expansion; and can provide a method to produce fiber reinforced composite material therefrom.
Fiber reinforced composite material produced according to the present invention can serve as material for parts of aircraft, including main wing, tail, rotor blade, fairing, cowl, and door; parts of spacecraft, including motor case and main wing; and parts of space satellite body structure. They can also be used preferably as material for automobile chassis and railroad vehicle body structure.
本发明涉及一种用于纤维增强复合材料的环氧树脂组合物,该组合物由以下组分 (1) - (3) 作为基本成分组成,它们的混合比例满足以下条件 (I) - (IV),并且组分 (3) 被均匀溶解:
成分(1):室温下为液态的环氧树脂、
组分(2):室温下为液态的芳香族多胺、
组分(3):二氨基二苯砜、
条件 (I):组分(1)相对于整个环氧树脂的比例为 60-100%、
条件 (II):组分(2)和(3)相对于组合物中整个多胺的比例之和为 70-100 wt%、
条件 (III):组分(3)相对于组合物中整个多胺的比例为 25-60 wt%,以及
条件(IV):组合物中整个多胺与整个环氧树脂的化学计量比为 0.7-1.3。
本发明的另一个实施方案涉及一种用于纤维增强复合材料的环氧树脂组合物,该组合物至少含有以下组分(4)-(6),形成的固化产物在交联点之间的理论分子量在 250-350 g/mol 范围内,且在 80°C 时的初始粘度为 1-500 MPa-s:
(4) 具有三官能度或更高官能度的芳香族环氧树脂、
(5) 具有二官能度或更高但低于三官能度的芳香族环氧树脂,以及
(6) 芳香族多胺、
交联点之间的分子量定义为整个固化环氧树脂的重量除以整个固化环氧树脂所含交联点的数量。本发明还涉及一种用于纤维增强复合材料的环氧树脂组合物,该组合物由以下组分 (7)和(8)组成:
(7) 由下式表示的苯酚芳基树脂聚缩水甘油醚:
其中 R1、R2、R3 和 R4 分别表示氢原子、具有 1-8 个碳原子的烷基或卤素原子,m 和 n 分别表示 1-4 的整数和 0 或大于等于 1 的实数;以及
(8) 多胺。
根据上述构成,本发明可以提供一种用于低成本生产高性能纤维增强复合材料的液态环氧树脂组合物,该组合物在相对较低的温度下具有较低的粘度,固化后的固化物具有较高的玻璃化转变温度、弹性模量和韧性,同时吸水引起的玻璃化温度降低较小,线膨胀系数也较小;本发明还可以提供一种用其生产纤维增强复合材料的方法。
根据本发明生产的纤维增强复合材料可用作飞机部件的材料,包括主翼、尾翼、旋翼、整流罩、整流罩和舱门;航天器部件,包括发动机壳体和主翼;以及太空卫星主体结构部件。它们还可优先用作汽车底盘和铁路车辆车身结构的材料。