摘要:
An epoxy resin composition which exhibits a low dielectric constant and a low dielectric dissipation factor as well as an excellent working susceptibility after its curing is provided. The epoxy resin composition contains at least one of a novolak resin (A) obtainable by condensing formalin or paraformaldehyde or both with an alkylphenol compound; and an epoxy resin (B) prepared by glycidylating said novolak resin (A) with an epihalohydrin.
an epoxy compound (a), with a polyhydric phenolic compound (b) in the presence of a catalyst, said epoxy compound (a) comprising a polyglycidylether compound which is obtained by reacting:
i) a mixture composed of a polyhydric phenolic compound (b') and at least one bisphenol compound selected from the group consisting of bisphenol A, bisphenol F, and tetrabromobisphenol A, with ii) an epihalohydrin compound.
(A) at least one epoxy resin selected from naphthalene ring-containing epoxy resins of the following structural formulae (1) and (2):
wherein E is R 0 is a hydrogen atom or
R 1 is a hydrogen atom or a monovalent hydrocarbon group having 1 to 6 carbon atoms, and n is an integer of from 0 to 5,
(B) a phenolic resin, and (C) an inorganic filler.
The compositions have good flow and cure to products having low modulus of elasticity, a low coefficient of expansion, high Tg irrespective of low stresses, and low water adsorption. Semiconductor devices encapsulated with the present composition are highly reliable even after being subject to thermal shocks upon surface mounting.
摘要翻译:一种环氧树脂组合物,其包含(A)至少一种选自以下结构式(1)和(2)的含萘环的环氧树脂的环氧树脂:其中E为 R 0的氢原子是氢 原子或 R 1为氢原子或碳原子数为1〜6的一价烃基,n为0〜5的整数,(B)酚醛树脂,(C)无机填料 。 组合物具有良好的流动性和固化性,具有低弹性模量,低膨胀系数,高Tg,与低应力无关,以及低吸水性的产品。 用本发明组合物封装的半导体器件即使在表面安装时受到热冲击也是高度可靠的。
摘要:
An epoxy resin having a propenyl group conjugated with an aromatic ring is heat resistant and is easily molded and cured into products having high strength and Tg. It is thus useful as a resin component or modifier. Its formula is:
wherein R¹ is hydrogen or a substituted or unsubstituted monovalent hydrocarbon group having 1 to 11 carbon atoms, X is hydrogen or a halogen atom, letters ℓ and m are integers of 0 to 50, with the proviso that m is an integer of 1 to 50 when ℓ = 0, and ℓ is an integer of 1 to 50 when m = 0.
摘要:
A phenolic novolac resin, particularly a phenolic novolac epoxy resin containing a compound of general formula (I), raw materials therefor, products of curing thereof, and method ofproducing the resin, wherein X represents H or (a), R represents C₁ to C₄ alkyl, and n is 1 to 10. This resin is superior to conventional phenolic resins in thermal resistance and reduced water absorbency, and is used for sealing electronics components, molding and lamination.
摘要:
A liquid epoxy composition containing a diglycidyl ether of a dihydric phenol and/or a diglycidyl ether of a tetrabrominated dihydric phenol, an epoxy with a functionality from 2.2 to 4, cycloaliphatic diamine curing agent, and thixotropic agent; and use thereof to fill drilled through-holes in circuit boards and cards and as isolation border around the edges of a board or card.
摘要:
The present invention relates to an unsaturated group-containing polycarboxylic acid resin produced by reacting an epoxidized compound of a condensate of a phenolic compound and an aromatic aldehyde having a phenolic hydroxyl group with (meth)acrylic acid, and further reacting the reaction product with polybasic carboxylic acid or an anhydride thereof; a composition comprising the resin and a cured product of the resin or the composition. The composition according to the present invention is developable with an aqueous alkaline solution and suitable for a solder resist composition which is excellent in heat resistance, solvent resistance, adhesion, electric insulation property and storage stability.
摘要:
Résines novolac époxy possédant des constituants à 2 fonctions réduits ainsi qu'un procédé pour réduire des constituants à 2 fonctions dans une résine novolac qui peut être utilisée pour préparer les résines novolac époxy. Lorsque des constituants à 2 fonctions et à 3 fonctions sont présents dans une résine novolac au phénol-formaldéhyde époxy, le rapport en poids entre le constituant à 2 fonctions et le constituant à 3 fonctions est inférieur à 1,1:1. Lorsque des constituants à 2 fonctions et à 3 fonctions sont présents dans une résine novolac au crésol-formaldéhyde époxy, le rapport en poids entre le constituant à 2 fonctions et le constituant à 3 fonctions est inférieur à 0,5:1. Les résines novolac époxy de cette invention après polymérisation présentent une élévation des températures de transition du verre. Ces résines sont utiles dans la préparation de composés, de pièces coulées, de revêtements, d'adhésifs et de stratifiés.
摘要:
Des novolacs époxydes ramifiés possédant de 5 à 10 (ou davantage) groupes d'éther de glycidyle par molécule sont préparés par époxydation de novolacs obtenus en faisant réagir des phénols mono- ou dihydriques avec des diphénols mono- ou dinucléaires substitués dans le cycle avec du 3- ou 4-méthylol et/ou des groupes d'alkoxyméthyle.
摘要:
An epoxy resin composition comprising a polyglycidyl ether prepared by reacting a 3-methyl-6-alkylphenol in the presence or absence of a phenol other than the 3-methyl-6-alkylphenol with an aldehyde to obtain a novolak, and then reacting the novolak with an epihalohydrin, which composition is useful in electronic fields, for example, for encapsulating semiconductor products or for the production of printed circuit boards.