摘要:
A liquid thermosetting epoxy resin composition contains a base resin in combination with a curing agent and a curing accelerator or with a curing catalyst. The base resin includes a cycloaliphatic epoxy compound having at least one alicyclic skeleton and two or more epoxy groups per molecule, and a polyol oligomer having two or more terminal hydroxyl groups. An optical semiconductor device includes an optical semiconductor element sealed by using the liquid thermosetting epoxy resin composition. The composition yields a cured resinous product which is free from curing failure, is optically homogenous, has a low elastic modulus in bending, a high bending strength, a high glass transition temperature, a high optical transparency and is useful for optical semiconductors.
摘要:
Disclosed is an alicyclic diepoxy compound which gives a cured article suffering from no deterioration in properties even when used in hot and humid surroundings or used under such conditions as to give a strong acid, which is highly reactive upon curing, and which gives a cured article superior typically in thermal stability. Specifically, the alicyclic diepoxy compound includes a 3,4,3′,4′-diepoxybicyclohexyl compound represented by following Formula (1): wherein R1 to R18 each represent a hydrogen atom, a halogen atom, a hydrocarbon group which may have an oxygen atom or a halogen atom, or a substituted or unsubstituted alkoxy group, in which the alicyclic diepoxy compound contains isomers of the 3,4,3′,4′-diepoxybicyclohexyl compound in a content of less than 20% based on the total of the 3,4,3′,4′-diepoxybicyclohexyl compound and the isomers thereof in terms of peak area ratio as determined by gas chromatography.
摘要:
A liquid epoxy resin composition of an epoxy resin, a curing agent, and a curing accelerator, where the epoxy resin is an alicyclic epoxy compound present in an amount from 100 to 30% by weight. The alicyclic epoxy compound is preferably produced by using a percarboxylic acid having a water content of 2% by weight. The curing agent is preferably a liquid acid anhydride.
摘要:
An alicyclic diepoxy compound (A) represented by formula (I) is produced in high purity and high yield at low cost, by epoxidizing the corresponding alicyclic diolefin compound with an organic percarboxylic acid. The curable epoxy resin composition has high reactivity for various curing agents, low viscosity, and excellent workability. A cured product thereof shows useful physical properties for uses in coatings, inks, adhesives, sealants, and encapsulants, etc. It is of extremely high quality as an epoxy resin composition for the encapsulation of electronic parts. A stabilizer for an electrical insulating oil (the alicyclic diepoxy compound or an electrical insulting oil containing the compound) is low in acid value, and the stabilizer improves the properties of the insulating oil. A cured product obtained by curing a casting epoxy resin composition for electrical insulation has excellent properties such as high bending strength, high Tg, and low permittivity.
摘要:
There are provided a novel compound having an 3,4-epoxytricyclo[5.2.1.02,6]decane skeleton and a polymerizable unsaturated bond, and a process for the preparation of the compound.There is also provided a copolymer including a monomeric unit (A) containing an alkali-soluble group, and a monomeric unit (B) corresponding to an epoxy-containing polymerizable unsaturated compound, or a copolymer including, in addition to the monomeric units (A) and (B), a monomeric unit (C) corresponding to an epoxy-free polymerizable unsaturated compound such as a N-substituted maleimide, in which the monomeric unit (B) occupies 40 to 90 percent by weight of total monomeric units, and 30 percent by weight or more of the monomeric unit (B) is a monomeric unit corresponding to a specific 3,4-epoxytricyclo[5.2.1.02,6]decane skeleton-containing compound. The copolymer can yield a film excellent typically in thermal stability, yield a resin composition having very high storage stability, and be easily synthetically prepared.
摘要:
The present invention provides a high-purity alicyclic epoxy compound in which an alicyclic olefin compound is epoxidized with an aliphaticpercarboxylic acid having substantially no water followed by the removal of a solvent to produce an alicyclic epoxy compound represented by the general formula (I) that is in turn subjected to purification by distillation to thereby the high-purity alicyclic epoxy compound wherein the concentration of high-molecular-weight components having an elution time shorter than that of the alicyclic epoxy compound in detection by a GPC analysis is 5.5% or less in terms of the area ratio, the concentration of impurities having a retention time shorter than that of the alicyclic epoxy compound in detection by a GC analysis is 19.5% or less in terms of the area ratio, the concentration of reactive intermediates is 4.5% or less in terms of the area ratio, and a color hue (APHA) is 60 or less; a process of efficiently producing the same by the use of a low-toxicity solvent; a curable resin composition using the same; a cured product; and applications.
摘要:
A thermosetting resin composition of this invention contains 100 parts by weight of composition (E), 0.01 to 20 parts by weight of a cationic polymerization initiator (C), and, where necessary, 50 parts by weight or less of an epoxy-containing acrylic resin (D), the composition (E) contains 10 to 99 percent by weight of an ester-free alicyclic epoxy compound (A), and 90 to 1 percent by weight of an epoxy compound (B) differing from (A). A cured article thereof is excellent in heat resistance, dimensional stability, and optical transparency and can be used as a replacement for glass substrates.
摘要:
According to the present invention (1), an alicyclic diepoxy compound represented by the following general formula (I): can be produced in high purity and high yields at low cost, by epoxidizing the corresponding alicyclic diolefin compound with an organic percarboxylic acid. As the alicyclic diepoxy compound lacks an ester group in the molecule, it will show high reactivity for a cationic catalyst. Besides, when it is used as a curable epoxy resin composition of the present invention (2), it will show an effect of lowering its curing temperature or reducing its curing time. The curable epoxy resin composition has high reactivity for various curing agents, low viscosity, and excellent workability. Moreover, the curable resin composition is also superior in that it has less effect to working surroundings, and a cured product thereof shows useful physical properties for the uses in coatings, ink, adhesives, sealants, encapsulants, and the like. Furthermore, as a resin composition of the present invention (3) shows a low coefficient of water absorption, it is of extremely high quality as an epoxy resin composition for the encapsulation of electronic parts. In addition, a stabilizer for an electrical insulating oil of the present invention (4) (i.e., the alicyclic diepoxy compound or an electrical insulating oil containing such a compound) is low in acid value, and the stabilizer improves the properties of the insulating oil. In addition, a cured product obtained by curing a casting epoxy resin composition for electrical insulation of the present invention (5) has excellent properties such as high bending strength, high Tg, and low permittivity.
摘要:
An electrophotographic photosensitive member, a process cartridge having the electrophotographic photosensitive member and an electrophotographic apparatus are provided. The electrophotographic photosensitive member has a conductive substrate and a photosensitive layer thereon, wherein the photosensitive layer contains a disazo pigment represented by the following formula (1): ##STR1## wherein R.sub.1 to R.sub.8 are the same or different and are each a hydrogen atom, a halogen atom, an alkyl group or an alkoxy group, n is a positive integer, A.sub.1 and A.sub.2 are the same or different and are each a coupler residual group having a phenolic hydroxyl group, and at least one of A.sub.1 and A.sub.2 is a coupler residual group represented by the following formula (2): ##STR2## wherein X.sub.1 is a residual group forming a polycyclic aromatic ring or a heterocyclic ring by condensing with a benzene ring, R.sub.9 and R.sub.10 are the same or different and are each a hydrogen atom, an alkyl group, an aryl group, an aralkyl group, a heterocyclic group or a residual group forming a cyclic amino group by bonding together, and Z.sub.1 is an oxygen atom or a sulfur atom.
摘要:
There are disclosed low crystalline oxytitanium phthalocyanines which have characteristic strong peaks at specific angles of Bragg angle 2.theta..+-.0.2.degree.. Using the low crystalline oxytitanium phthalocyanines, it is easy to obtain oxytitanium phthalocyanines having novel crystal forms. Electrophotographic photosensitive member containing the oxytitanium phthalocyanines having novel crystal forms have a very high photosensitivity to beams of long wavelength, a ver high potential stability as well as excellent durability in repetitive use.