Abstract: A thermosetting resin composition comprising (i) a polymaleimide compound having at least two maleimide groups in the molecule and (ii) an s-triazine compound having at least two alkenylaryloxy groups in the molecule; a resin-composition for encapsulant comprising said polymaleimide compound, said triazine compound, and an inorganic filler as essential components; and said s-triazine compound.

Abstract: An epoxy resin composition comprising a novolak type epoxy resin which is produced from a substituted-phenol novolak and epihalohydrin, and is 0.15 or less in a maximum absorbance of a 3% (W/V) dichloromethane solution of the epoxy resin, the absorbance being measured at a wave number of between 3570 and 3600 cm.sup.-1 with an infrared spectrophotometer having a cell of 2 mm length, which is useful particularly in encapsulating and laminating applications in electronic fields.

Abstract: A thermosetting resin composition comprising (i) a polymaleimide compound having at least two maleimide groups in the molecule and (ii) an s-triazine compound having at least two alkenylaryloxy groups in the molecule; a resin-composition for encapsulant comprising said polymaleimide compound, said traizine compound, and an inorganic filler as essential components; and said s-triazine compound.

Abstract: The invention provides an imide compound represented by the general formula (I), ##STR1## wherein X represents a hydroxyl or amino group, Ar.sub.1 and Ar.sub.2 independently represent an aromatic residue, R.sub.1 represents a hydrogen atom or a C.sub.1 -C.sub.10 alkyl group, R.sub.2 represents a hydrogen atom, a C.sub.1 -C.sub.20 alkyl or alkoxy group or a hydroxyl group, and n represents a number of from 0 to 6, and also provides an epoxy resin composition containing the imide compound (B) and epoxy resins (A) as essential components.

Abstract: A thermosetting resin composition comprising (i) a polymaleimide compound having at least two maleimide groups in the molecule and (ii) an s-triazine compound having at least two alkenylaryloxy groups in the molecule; a resin-composition for encapsulant comprising said polymaleimide compound, said triazine compound, and an inorganic filler as essential components; and said s-triazine compound.

Abstract: A thermosetting resin composition comprising (A) a phenol novolac resin, some of the hydroxyl groups of which have been allyl-etherified and the other hydroxyl groups having added thereto a compound having one or more epoxy groups and (B) a polymaleimide compound having two or more maleimide groups in the molecule.

Abstract: A thermosetting resin composition comprising an N,N'-bismaleimide compound and an allylated phenol novolak resin having partially or wholly allyl-etherified phenolic hydroxyl groups and substantially no nucleous-substituted allyl group.

Abstract: 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.

Abstract: m-Isopropenylphenol oligomer which is useful for the production of synthetic resins such as epoxy resins is produced by polyermizing m-isopropenylphenol at a temperature of 135.degree. to 230.degree. C. using a catalytic amount of an acid catalyst in the presence or absence of a solvent, or freezing m-isopropenylphenol in the presence or absence of an acid catalyst.

Abstract: An oligomer of m-isopropenylphenol is produced by subjecting m-isopropenylphenol to thermal polymerization in the absence of a catalyst.

Abstract: m-Isopropenylphenol oligomer which is useful for the production of synthetic resins such as epoxy resins is produced by polymerizing m-isopropenylphenol at a temperature of 135.degree. to 230.degree. C. using a catalytic amount of an acid catalyst in the presence or absence of a solvent, or freezing m-isopropenylphenol in the presence or absence of an acid catalyst.

Abstract: An epoxy resin useful for coatings, adhesives and molding materials which is derived from a by-product tar produced as by-product in manufacturing resorcinol or resorcinol and hydroquinone via hydroperoxide of m-diisopropylbenzene or of a combination of m- and p-diisopropylbenzenes and containing m-substituted phenolic constituents or a combination of m- and p-substituted phenolic constituents as major constituents, or is derived from a polymerization product of said by-product tar.

Abstract: A novel copolymer resin having excellent compatibility with rubber and plastics, stable to air, easily soluble in the hydrocarbon solvents and free of gel, said resin being obtained either (1) by copolymerizing one or more of the monomeric substances selected from the group consisting of cyclopentadiene, dicyclopentadiene and alkyl-substituted compounds thereof and one or more of the substances selected from the hydroxystyrene derivatives, or (2) by copolymerizing one or more of the monomeric substances selected from the group consisting of cyclopentadiene, dicyclopentadiene and alkyl-substituted compounds thereof, one or more of the substances selected from the codimers of cyclopentadiene and/or alkyl-substituted compounds thereof and chain conjugated diolefins having 4 to 5 carbon atoms, and one or more of the substances selected from the hydroxystyrene derivatives. There are also provided compositions comprising said resin and rubber or thermoplastic high-molecular weight substances.

Abstract: An epoxy resin of the formulae (I) and/or (II), ##STR1## wherein R and R' are each hydrogen atom or an alkyl group having 1 to 3 carbon atoms and n is a mean value satisfying the equation, 0<n.ltoreq.2, which is excellent in heat resistance, flexibility, curability and the like, and is useful in paints, adhesives, civil engineering and construction industry, electric appliances and the like.

Abstract: A new modified elastomer having a phenolic hydroxyl group on the side chain, which is excellent in physical properties, crosslinkability, thermal stability, tackiness, adhesiveness and compatibility, is obtained by copolymerizing at least one monomer selected from the group consisting of conjugated dienes, and mono-ethylenically unsaturated monomers, or graft-copolymerizing an elastomer prepared by polymerizing at least one monomer defined above, with a phenolic monomer represented by the general formula, ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 are individually an alkyl group or a hydrogen atom.

Abstract: A novel copolymer resin having excellent compatibility with rubber and plastics, stable to air, easily soluble in the hydrocarbon solvents and free of gel, said resin being obtained either (1) by copolymerizing one or more of the monomeric substances selected from the group consisting of cyclopentadiene, dicyclopentadiene and alkyl-substituted compounds thereof and one or more of the substances selected from the hydroxystyrene derivatives, or (2) by copolymerizing one or more of the monomeric substances selected from the group consisting of cyclopentadiene, dicyclopentadiene and alkyl-substituted compounds thereof, one or more of the substances selected from the codimers of cyclopentadiene and/or alkyl-substituted compounds thereof and chain conjugated diolefins having 4 to 5 carbon atoms, and one or more of the substances selected from the hydroxystyrene derivatives. There are also provided compositions comprising said resin and rubber or thermoplastic high-molecular weight substances.

Abstract: Rubbers are prevented from ozone deterioration without discoloring or staining by the addition of a nitrile of the formula, ##STR1## wherein R.sub.1 and R.sub.2 are each hydrogen, C.sub.1 - C.sub.24 aliphatic, C.sub.5 - C.sub.7 alicyclic or aryl, or R.sub.1 and R.sub.2 may form together with the adjacent nitrogen atom a heterocyclic group which may further contain oxygen, and R.sub.3 and R.sub.4 are each hydrogen or lower alkyl.

Abstract: A modified elastomer having a phenolic hydroxyl group on the side chain which is excellent in tackiness and in compatibility with other elastomers, characterized in that the elastomer is obtained by graft-copolymerizing an elastomer, prepared by copolymerizing ethylene with at least one .alpha.-olefin represented by the general formula R'--CH=CH.sub.2, wherein R' is an alkyl group, and at least one non-conjugated diene or polyene, with at least one phenolic monomer represented by the general formula (A), ##STR1## wherein R is a lower alkyl group or a hydrogen atom; and R.sub.1 to R.sub.5 are individually an alkyl group, a hydrogen atom or a hydroxyl group, one of said R.sub.1 to R.sub.5 being a hydroxyl group, and wherein the said hydroxyl group may have been protected by an alkyl, acyl or the like group.

Abstract: A compound of the formula (1), ##STR1## WHEREIN R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6 and R.sub.7 are individually a hydrogen atom or a C.sub.1 -C.sub.20 alkyl group, A is a hydrocarbon residue, and n is an integer of 2 or 3, provided that when R.sub.1 is a methyl group and each of R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6 and R.sub.7 is a hydrogen atom, the isopropenyl group ##STR2## is substituted at o- or m-position to the oxycarbonyl group ##STR3## which is useful as a crosslinking plasticizer for rubber.

Abstract: A new modified elastomer having a phenolic hydroxyl group on the side chain, which is excellent in physical properties, crosslinkability, thermal stability, tackiness, adhesiveness and compatibility, is obtained by copolymerizing at least one monomer selected from the group consisting of conjugated dienes, and monoethylenically unsaturated monomers, or graft-copolymerizing an elastomer prepared by polymerizing at least one monomer defined above, with a phenolic monomer represented by the general formula, ##SPC1##Wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 are individually an alkyl group or a hydrogen atom.