Abstract: The present invention relates to 4-methyl-1-pentene polymer compositions. Specifically, the present invention relates to adhesive compositions comprising the 4-methyl-1-pentene polymers used in bonding a 4-methyl-1-pentene polymer layer and a polar-group-containing resin layer, and laminates obtained by using such compositions. The 4-methyl-1-pentene polymer compositions as these adhesive compositions comprise a 4-methyl-1-pentene polymer (A); and a modified polyolefin resin (B) comprising a mixture of an unsaturated carboxylic acid-modified a-olefin polymer (B-1) whose &agr;-olefin is selected from a group of propylene, butene-1 and 4-methyl-1-pentene and an unsaturated carboxylic acid-modified ethylene-&agr;-olefin copolymer (B-2). In these compositions, an unsaturated carboxylic acid-modified 4-methyl-1-pentene polymer (A′) showing a particular modification rate and a particular melt flow rate may be used in place of (A) and (B-1).

Abstract: The present invention relates to a multi-layer laminate comprising at least two layers of an oriented ultra-high molecular polyolefin layer and a thermoplastic resin layer. The multi-layer laminate exhibits excellent abrasion resistance, tensile strength, shock resistance, heat-sealing property, uniformity in the film thickness, and can be efficiently produced. The invention is further concerned with a process and an apparatus for producing the multi-layer laminate.

Abstract: The present invention relates to 4-methyl-1-pentene polymer compositions. Specifically, the present invention relates to adhesive compositions comprising the 4-methyl-1-pentene polymers used in bonding a 4-methyl-1-pentene polymer layer and a polar-group-containing resin layer, and laminates obtained by using such compositions. The 4-methyl-1-pentene polymer compositions as these adhesive compositions comprise a 4-methyl-1-pentene polymer (A); and a modified polyolefin resin (B) comprising a mixture of an unsaturated carboxylic acid-modified .alpha.-olefin polymer (B-1) whose .alpha.-olefin is selected from a group of propylene, butene-1 and 4-methyl-1-pentene and an unsaturated carboxylic acid-modified ethylene/.alpha.-olefin copolymer (B-2). In these compositions, an unsaturated carboxylic acid-modified 4-methyl-1-pentene polymer (A') showing a particular modification rate and a particular melt flow rate may be used in place of (A) and (B-1).

Abstract: Provided are cycloolefin copolymer compositions comprising a hydrocarbon elastomer component substantially free from a polymerizable double bond and a cycloolefin random copolymer component obtained by copolymerization of an .alpha.-olefin of at least 2 carbon atoms and a cycloolefin in the presence of said hydrocarbon elastomer component, said composition containing said hydrocarbon elastomer component in an amount of 1-50% by weight, and a method for preparing said cycloolefin copolymer compositions.Also provided are cycloolefin copolymer compositions comprising a hydrocarbon elastomer component having a polymerizable double bond and a cycloolefin copolymer component obtained by copolymerization of an .alpha.-olefin of at least 2 carbon atoms and a cycloolefin in the presence of said hydrocarbon elastomer component, said composition containing said hydrocarbon elastomer component in an amount of 1-50% by weight.

Abstract: Provided are cycloolefin copolymer compositions comprising a hydrocarbon elastomer component substantially free from a polymerizable double bond and a cycloolefin random copolymer component obtained by copolymerization of an .alpha.-olefin of at least 2 carbon atoms and a cycloolefin in the presence of said hydrocarbon elastomer component, said composition containing said hydrocarbon elastomer component in an amount of 1-50% by weight, and a method for preparing said cycloolefin copolymer compositions.Also provided are cycloolefin copolymer compositions comprising a hydrocarbon elastomer component having a polymerizable double bond and a cycloolefin copolymer component obtained by copolymerization of an .alpha.-olefin of at least 2 carbon atoms and a cycloolefin in the presence of said hydrocarbon elastomer component, said composition containing said hydrocarbon elastomer component in an amount of 1-50% by weight.

Abstract: The higher .alpha.-olefin copolymer of the invention is a copolymer of specific higher .alpha.-olefin, specific .alpha.,.omega.-diene and specific non-conjugated diene, and this copolymer has a specific molar ratio of the higher .alpha.-olefin to the .alpha.,.omega.-diene, a specific content of the non-conjugated diene and a specific intrinsic viscosity. This higher .alpha.-olefin copolymer can be prepared using a catalyst for olefin polymerization formed from a specific solid titanium catalyst component, an organometallic compound catalyst component and an electron donor catalyst component. The vibration-insulating rubber molded product of the invention is formed from a vulcanized product of the above-mentioned copolymer.

Abstract: There is provided a composition comprising a higher a-olefin copolymer (1) obtained by copolymerization in the presence of a specific olefin polymerization catalyst of a specific higher .alpha.-olefin, a specific .alpha., .omega.-diene of the formula (I) and a specific non-conjugated diene of the formula (II), and a rubber (2) selected from the group consisting of a diene rubber, an ethylene/a-olefin copolymer, a nitrile rubber and a hydrogenated nitrile rubber. The composition is excellent in workability strength characteristics, weatherability, ozone resistance and dynamic fatigue resistance, as well as excellent in adhesive properties to fiber and in vibration-insulating properties and damping properties.

Abstract: The ethylene/.alpha.-olefin/7-methyl-1,6-octadiene copolymer rubber of the invention is a random copolymer rubber prepared using a Group IVB transition metal type catalyst containing a specific zirconium catalyst component, and in this copolymer rubber, a molar ratio of ethylene to .alpha.-olefin, a diene content, an intrinsic viscosity [.eta.], an intensity ratio D of T.alpha..beta. to T.alpha..alpha. in a .sup.13 C-NMR spectrum of said copolymer rubber, a B value which is a measure of distribution of each monomer and a glass transition temperature are all within specific ranges. The rubber composition of the invention comprises the above-mentioned random copolymer rubber and a conjugated diene rubber. The random copolymer rubber has high stereoregularity, narrow composition distribution and excellent low-temperature flexibility, and shows extremely high covulcanizability with the conjugated diene rubber.

Abstract: A polyamide comprising a recurring unit of the formula (I), ##STR1## wherein each of R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7 and R.sup.8 is independently a hydrogen atom, a halogen atom, a hydroxyl group, or a group of a carbon skeleton which may contain a hetero atom or a halogen atom, and A.sup.1 is a divalent hydrocarbon group; and a process for the production of a polyamide comprising the recurring unit of the formula (I), which comprises subjecting to a polycondensation reaction a dicarboxylic acid comprising an alicyclic dicarboxylic acid of the formula (a)-1, ##STR2## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7 and R.sup.8 are as defined in the formula (I), and a diamine of the formula (b)-1,H.sub.2 N-A.sup.1 -NH.sub.2 (b)-1wherein A.sup.1 is as defined in the formula (I).

Abstract: A heat-resistant, flame-retardant epoxy resin composition is provided by combining or reating members selected from a polyfunctional epoxy resin, a bisphenol type epoxy resin, a highly halogenated bisphenol type epoxy resin, a low halogenated bisphenol type epoxy resin, and a halogenated bisphenol. The composition is suitable as a laminate useful for printed circuit boards.

Abstract: Disclosed is a heat-resistant flame-retardant epoxy resin composition comprising a halogen-containing epoxy resin obtained by reacting a trifunctional epoxy compound having a specific structure with a halogenated bisphenol in the presence of a catalyst. Furthermore, a novel specific trifunctional epoxy compound is disclosed, which is valuably used for the production of the above-mentioned halogen-containing epoxy resin.

Abstract: A novel epoxy compound having a chemical structure in which an aromatic ring having a glycidyl raedical attached thereto has a tertiary alkyl radical at its ortho or meta-position. An epoxy resin composition comprising the epoxy compound, a curing agent, and a curing accelerator which cures into a product having a low dielectric constant.

Abstract: A semiconductor encapsulating material is obtained from a polyimide resin composition comprising (A) a polyaminobismaleimide resin, (B) a silicone monomer and/or oligomer having a hydroxyl or alkoxyl group bonded to a silicon atom and mixtures thereof, and (C) an inorganic filler wherein the weight ratio of polyaminobismaleimide resin (A) to silicone component (B) ranges from 99.5/0.5 to 70/30, and the weight ratio of polyaminobismaleimide resin (A) to inorganic filler (C) ranges from 100/50 to 100/1000.

Abstract: An epoxy resin composition comprising a trifunctional epoxy resin derived from a trisphenol having the structure represented by the following general formula ##STR1## wherein R represents a hydrogen atom, an alkyl group or a halogen atom, and a novolak-type phenolic resin. This epoxy resin composition gives a cured product having excellent pliability and a high glass transition temperature. It is especially useful as a semiconductor encapsulating material.

Abstract: A novel epoxy resin composition is obtained by modifying a bisphenol-type epoxy resin and/or a halogen-containing epoxy resin with a trisphenol represented by the following general formula: ##STR1## wherein each of R.sub.1 and R.sub.2 represents hydrogen or an alkyl group havng not more than 6 carbon atoms with the proviso that at least one of them is the alkyl group, each of R.sub.3, R.sub.4 and R.sub.5 represents hydrogen or an alkyl group having not more than 4 carbon atoms, and n represents a number of 0 or 1. The composition is suitable, for example, as a paint, a casting material or a molding material.