Nippon Steel & Sumikin Chemical Co., Ltd.

Nippon Steel Chemical Co., Ltd.

Koichiro Ogami

Masashi Kaji

Kazuhiko Nakahara

Tomomi Fukunaga

Disclosed is a polymer which is useful for the preparation of an epoxy resin composition or a cured product thereof in film or sheet exhibiting high heat resistance, high thermal conductivity, low thermal expansion, high gas barrier property, and high toughness. The polymer is a thermoplastic aromatic ether polymer comprising a unit represented by the following general formula (1) at a ratio of 10 to 100 mol % and having a weight average molecular weight of 3,000 or more; in formula (1), X is an oxygen atom or a sulfur atom, Rand Reach is a hydrogen atom, an alkyl group of 1 to 8 carbon atoms, an aryl group, an alkoxy group, an aralkyl group, or a halogen atom, and n is a number of 1 to 3.

Aromatic ether polymer, method for producing the same, and polymer composition

Provided are a crystalline resin cured product which shows high thermal conductivity, low thermal expansion, high heat resistance, low moisture absorption, and good gas barrier properties and a crystalline resin composite material produced therefrom. Further provided is a method for producing the crystalline resin cured product and the crystalline resin composite material. The crystalline resin cured product is obtained by the reaction of an aromatic diglycidyl compound or a diglycidyl resin with an aromatic dihydroxy compound or with a dihydroxy resin and it shows a heat of melting of 10 J/g or more in differential thermal analysis while the endothermic peak corresponding to the melting appears in the range of 120 to 320&#xb0; C. The crystalline resin composite material is obtained by combining the crystalline resin cured product with a filler or a base material. The crystalline resin cured product has a unit represented by -A-O&#x2014;CH&#x2014;CH(OH)&#x2014;CH&#x2014;O&#x2014;B&#x2014;, wherein A and B are divalent aromatic groups.

Crystalline resin cured product, crystalline resin composite material, and method for producing the same

This invention relates to novel epoxy resins and epoxy resin compositions comprising said epoxy resins or cured articles thereof. The cured articles have excellent properties in respect to flame retardance, adhesiveness, moisture resistance and heat resistance and can be used in applications such as lamination, molding, casting and adhesion. The epoxy resins of this invention are represented by the following formula (3)wherein Ydenotes a glycidyloxyarylmethyl group represented by &#x2014;CH&#x2014;Ar&#x2014;OG, Yand Ydenote independently a glycidyl group or the aforementioned glycidyloxyarylmethyl group, Ar denotes a phenylene group which can be substituted with up to two hydrocarbon groups and G denotes a glycidyl group.

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Kitakyushu, Japan

Koichiro Ogami