Abstract:
There are provided a novel aromatic aldehyde compound capable of providing an epoxy resin coating film and an epoxy resin cured material satisfying all of the excellent surface property (smoothness, gloss), drying property, water resistance, transparency and adhesion, and an epoxy resin curing agent and an epoxy resin composition containing the aromatic aldehyde compound. The aromatic aldehyde has a branched alkyl group having 10 to 14 carbon atoms.
Abstract:
The present invention is a cyanate-epoxy composite resin composition comprised of a cyanate ester resin (A), an epoxy resin (B), and a latent curing agent (C), characterized in that the latent curing agent (C) is composed of a modified polyamine (c1), a phenol resin (c2) and one or more kind of polycarboxylic acid (c3). The above modified polyamine (c1) is a modified polyamine, which is obtained by the reaction of polyamine compound (c1-1) with epoxy compound (c1-2), containing one or more amino group having an active hydrogen within a molecule.
Abstract:
The present invention relates to polyepoxy resins, methods for making polyepoxy resins water soluble, curable coating compositions, and kits useful in their preparation.
Abstract:
Compositions comprising (a) an epoxy resin, (b) a hardener for the epoxy resin, (c) a product of the reaction of a microgel containing carboxylic acid groups and a nitrogen-containing base, and (d) an electrically conducting filler combination comprising, based on the total amount of filler, at least 75% by weight of graphite, are particularly suitable for producing biopolar plates.
Abstract:
The present invention provides an organic carboxylate composition that has long working life, cures epoxy resins, and improves adhesive properties, and also provides a method for producing the same. An organic carboxylate composition, obtained by heating and mixing a basic silane coupling agent and an amine compound with a softening point or melting point of 40° C. or greater together with an organic carboxylic acid; a method for producing the same; an additive for epoxy resin that contains this as the active ingredient thereof; and an epoxy resin composition containing the same. The basic silane coupling agent should preferably be a specific imidazole-group containing silane coupling agent, amino group-containing silane coupling agent, dialkylamino group-containing silane coupling agent, monomethylamino group-containing silane coupling agent, benzimidazole group-containing silane coupling agent, benzotriazole group-containing silane coupling agent, and pyridine ring-containing silane coupling agent.
Abstract:
The present invention relates to polyepoxy resins, methods for making polyepoxy resins water soluble, curable coating compositions, and kits useful in their preparation.
Abstract:
A liquid epoxy resin composition comprising (A) a liquid epoxy resin, (B) a curing agent, (C) a curing accelerator, and (D) an inorganic filler is provided, the curing agent (B) comprising 5 to 75 parts by weight of a mixture of 3,4-dimethyl-6-(2-methyl-1-propenyl)-1,2,3,6-tetrahydrophthalic acid and 1-isopropyl-4-methyl-bicyclonull2.2.2nulloct-5-ene-2,3-dicarboxylic acid per 100 parts by weight of the entire curing agent. The composition is adherent to the surface of silicon chips, and especially to polyimide resins and nitride films and has high thermal shock resistance. A semiconductor device sealed with the cured epoxy resin composition remains reliable.
Abstract:
In a protective coating formulation requiring the use of polyamine molecules, oleic acid is used as a very effective additive to remove any excess polyamines. The carboxyl groups of the oleic acid molecules react with the amine groups of the polyamines to form a harmless amide molecule. The oleic acid thus removes excess pollutants from the final coating. In addition, the oleic acid reduces the viscosity of the coating before curing, making it easier to apply to surfaces, and decreases the curing time necessary. However, the addition of oleic acid does not affect the beneficial characteristics of the coating in any way.
Abstract:
An epoxy resin composition comprising (a) a low-viscosity epoxy resin having a viscosity of not more than 100 poise at 25.degree. C. which contains a tri- or tetrafunctional liquid aromatic epoxy resin, (b) a liquid curing agent selected from the group consisting of an imidazole compound, the combination of a liquid alicyclic acid anhydride and an imidazole compound, the combination of a liquid alicyclic amine and an imidazole compound, (c) a metal powder having an average particle size of not more than 125 .mu.m or an inorganic powder consisted of 50 parts or more by weight of a metal powder having an average particle size of not more than 125 3/4m and less than 50 parts by weight of an inorganic filler other than a metal powder, whose average particle size is smaller than that of the metal powder, based on the total amount of the metal powder and the inorganic filler. The composition has satisfactory fluidity and provides a cured product having high strength, a small thermal expansion coefficient, excellent heat-resistance and satisfactory surface characteristics. The composition is useful for the production of a resin mold, etc.
Abstract:
A device e.g., an electrical or electromechanical assembly (62), comprising a housing (64) with a mechanism (66) disposed therein which is potted by a cured mass of self-leveling liquid composition. The composition comprises an actinic radiation cured first resin component (102) preferably (methacrylate resins, which immobilize the partially cured mass, and a subsequently cured second resin component (100), preferably epoxy resins, which is non-cured under the actinic radiation but curable at ambient or elevated temperature. Depending on the depth of the composition which is to be cured in the housing, it may be desirable to utilize the self-leveling liquid composition as either a single homogeneous mixture of the first and second resin components, or, where the depth of the housing is greater than the depth of UV penetration, as cured mass wherein the first resin component is in a separate and discrete resin layer overlying a lower resin layer containing the second resin component but not the first resin component.