摘要:
A low dielectric constant, a low dielectric loss tangent, and heat resistance are achieved. An active ester resin that has a resin structure produced by reacting a polyfunctional phenolic compound (a1) with a monofunctional aromatic carboxylic acid or its chloride (a2) and an aromatic dicarboxylic acid or its chloride (a3) in such a manner that the amount of the component (a2) is 0.4 to 0.95 moles and the amount of the component (a3) is 0.3 to 0.025 moles per mole of phenolic hydroxyl groups of the component (a1) is used as a curing agent for epoxy resin. The polyfunctional phenolic compound (a1) is represented by structural formula (1) below: (where Ar represents a benzene ring, a naphthalene ring, a benzene ring nuclear-substituted by an alkyl group having 1 to 4 carbon atoms, or a naphthalene ring nuclear-substituted by an alkyl group having 1 to 4 carbon atoms, X represents a methylene group, a divalent cyclic aliphatic hydrocarbon group, a phenylene dimethylene group, or a biphenylene-dimethylene group, and n represents the number of repeating units and the average thereof is in a range of 0.5 to 10).
摘要:
The present invention provides an epoxy resin having a low melting point, low melt viscosity, excellent solvent solubility, and excellent processability. Also, the present invention provides an epoxy resin composition and a cured product thereof having excellent fluidity, processability, flexibility, adhesion, and thermal conductivity. The epoxy resin is represented by general formula (I) below (Q: an alkylene chain having a C1-C9 linear part which may have a C1-C18 alkyl group in a side chain, or a linkage chain having an ether bond present between two continuous methylene groups in the alkylene chain; A: a phenylene unit in which 2 to 4 phenylene groups are bonded directly or through a linkage chain, or a naphthylene unit, n: 0 to 10). The epoxy resin composition contains the epoxy resin and a curing agent. The composition includes the epoxy resin.
摘要:
The present invention provides a curable resin composition having excellent fluidity and giving a cured product having excellent physical properties such as heat resistance, moisture resistance/solder resistance, flame retardance, and dielectric characteristics. The curable resin composition contains a resin (A) which has a benzoxazine structure represented by structural formula (A1) below and an epoxy resin (B) at such a ratio that when the total number of moles of the benzoxazine structure of the structural formula (A1) is ±, and the number of moles of epoxy groups in the epoxy resin (B) is ², a ratio [²/±] is 0.1 to 0.5.
摘要:
The present invention provides a curable resin composition exhibiting excellent performance as a cured product, such as excellent heat resistance and flame retardancy, and further exhibiting excellent interlayer adhesive strength when applied to a printed circuit board. A phenol resin composition used as a curing agent for an epoxy resin includes a naphthol novolac resin (a1) represented by general formula (1) (wherein R 1 and R 2 each independently represent a hydrogen atom, an alkyl group, or an alkoxy group, and n is a repeating unit and an integer of 1 or more), and a compound (a2) represented by general formula (2) (wherein R 1 and R 2 each independently represent a hydrogen atom, an alkyl group, or an alkoxy group), wherein the total ratio of compounds with n = 1 and n = 2 in the general formula (1) present in the composition is in the range of 10 to 35%, the average of n in the general formula (1) is in the range of 3.0 to 7.0, and the content of the compound (a2) in the composition is 1 to 6%.
摘要:
An epoxy resin composition that excels in the flame retardance, heat resistance and hardening easiness of hardening product, being suitable for use as a resin composition for semiconductor devices, circuit board units, etc.; for use therein, a novel epoxy resin and novel phenolic resin; and a semiconductor sealing material. This epoxy resin composition is characterized by containing, as indispensable components, (A) epoxy resin having a structure of naphthalene skeleton bonded via an oxygen atom with another arylene skeleton, wherein the total of aromatic nuclei constituting the above naphthalene skeleton and arylene skeleton per molecule is in the range of 2 to 8, and wherein the aromatic nuclei have a (meta)glycidyloxy group as a substituent and (B) hardening agent.
摘要:
An epoxy resin composition including an epoxy resin and a curing agent as essential components, in which the curing agent comprises a phenol resin which has each structural moiety of a phenolic hydroxyl group-containing aromatic hydrocarbon group (P), an alkoxy group-containing aromatic hydrocarbon group (B) and a divalent aralkyl group (X), and also has, in a molecular structure, a structure in which the phenolic hydroxyl group-containing aromatic hydrocarbon group (P) and the alkoxy group-containing aromatic hydrocarbon group (B) are bonded with the other phenolic hydroxyl group-containing aromatic hydrocarbon group (P) or alkoxy group-containing aromatic hydrocarbon group (B) via the divalent aralkyl group (X).