Abstract: The invention relates to a polyphenylene ether resin containing residual aliphatic unsaturation as well as composites, blends, and articles made from the polyphenylene ether resin containing residual aliphatic unsaturation. Also included are reaction products between the polyphenylene ether resin containing residual aliphatic unsaturation and other resins and unsaturated resin formulations, e.g., thermosetting polyesters, acrylics, bismaleiimides, silicones, and allylics, and thermoplastics such as polyolefins, styrenics, rubbers, etc.

Abstract: An antenna comprising two essentially identical electrically conducting rectangular plates lying in parallel planes and separated so that a gap is formed between the plates also includes a dielectric situated within the gap and exhibiting a relative permittivity that changes with frequency. Electrical connectors connect the plates to corresponding conductors that carry the signal to be radiated by the antenna.

Abstract: An antenna comprising two essentially identical electrically conducting rectangular plates lying in parallel planes and separated so that a gap is formed between the plates also includes a dielectric situated within the gap and exhibiting a relative permittivity that changes with frequency. Electrical connectors connect the plates to corresponding conductors that carry the signal to be radiated by the antenna.

Abstract: Laminate structures, for example for use in circuit boards, comprise a metal foil and at least one cured composition layer disposed on at least one surface of the metal foil, wherein the cured composition layer comprises (a) at least one compound selected from the group consisting of cyanate esters and cyanate ester prepolymers, (b) a flame retardant which is substantially toluene soluble and substantially free of hydroxy residues in the cured state, and (c) a curing catalyst.

Abstract: The invention relates to a polyphenylene ether resin containing residual aliphatic unsaturation as well as composites, blends, and articles made from the polyphenylene ether resin containing residual aliphatic unsaturation. Also included are reaction products between the polyphenylene ether resin containing residual aliphatic unsaturation and other resins and unsaturated resin formulations, e.g., thermosetting polyesters, acrylics, bismaleiimides, silicones, and allylics, and thermoplastics such as polyolefins, styrenics, rubbers, etc.

Abstract: The invention relates to a novel process for the manufacture of polyphenylene ether resin containing residual aliphatic unsaturation. The invention also relates to the polyphenylene ether resin containing residual aliphatic unsaturation as well as composites, blends, and articles made from the polyphenylene ether resin containing residual aliphatic unsaturation. Also included are reaction products between the polyphenylene ether resin containing residual aliphatic unsaturation and other resins and unsaturated resin formulations, e.g., thermosetting polyesters, acrylics, and thermoplastics such as polyolefins.

Abstract: A thermosetting composition comprises a capped poly(arylene ether), an alkenyl aromatic monomer, and an acryloyl monomer. The composition provides good flow properties and fast curing rates. After curing, the composition exhibits good stiffness, toughness, heat resistance, and dielectric properties.

Abstract: Carboxy-functionalized polyphenylene ethers containing structural units with a carboxyalkyl group in the 2-position are prepared by redistribution of a polyphenylene ether with a 2-carboxyalkylphenol such as 2-(3-carboxypropyl)phenol (melilotic acid), or by oxidative coupling of a suitable phenol with such a 2-carboxyalkylphenol. The products form compatibilizing copolymers with polymers containing carboxylic acid-reactive functional groups, such as polyesters, polyamides and epoxy resins.

Abstract: Carboxy-functionalized polyphenylene ethers containing structural units with a carboxyalkyl group in the 2-position are prepared by redistribution of a polyphenylene ether with a 2-carboxyalkylphenol such as 2-(3-carboxypropyl)phenol (melilotic acid), or by oxidative coupling of a suitable phenol with such a 2-carboxyalkylphenol. The products form compatibilizing copolymers with polymers containing carboxylic acid-reactive functional groups, such as polyesters, polyamides and epoxy resins.

Abstract: Curable compositions used in circuit boards, structural composite, encapsulating resins, and the like, comprise at least one of a cyanate ester and a cyanate ester prepolymer, a cyanate ester-free aryloxytriazine, and a curing catalyst.

Abstract: Carboxy-functionalized polyphenylene ethers containing structural units with a carboxyalkyl group in the 2-position are prepared by redistribution of a polyphenylene ether with a 2-carboxyalkylphenol such as 2-(3-carboxypropyl)phenol (melilotic acid), or by oxidative coupling of a suitable phenol with such a 2-carboxyalkylphenol. The products form compatibilizing copolymers with polymers containing carboxylic acid-reactive functional groups, such as polyesters, polyamides and epoxy resins.

Abstract: Curable compositions used in circuit boards, structural composite, encapsulating resins, and the like, comprise at least one compound selected from the group consisting of cyanate esters and cyanate ester prepolymers, a flame retardant which is substantially toluene soluble and substantially free of hydroxy residues in the cured state, and a curing catalyst.

Abstract: The present invention relates to curable compositions used in circuit boards, structural composite, encapsulating resins, and the like. These compositions comprise at least one of a cyanate ester and a cyanate ester prepolymer, a cyanate ester-free aryloxytriazine, and a catalyst.

Abstract: Curable compositions used in circuit boards, structural composite, encapsulating resins, and the like, comprise at least one of a cyanate ester and a cyanate ester prepolymer, a cyanate ester-free aryloxytriazine, and a curing catalyst.

Abstract: Carboxy-functionalized polyphenylene ethers containing structural units with a carboxyalkyl group in the 2-position are prepared by redistribution of a polyphenylene ether with a 2-carboxyalkylphenol such as 2-(3-carboxypropyl)phenol (melilotic acid), or by oxidative coupling of a suitable phenol with such a 2-carboxyalkylphenol. The products form compatibilizing copolymers with polymers containing carboxylic acid-reactive functional groups, such as polyesters, polyamides and epoxy resins.

Abstract: Polyphenylene ether-thermosetting resin compositions are provided that are useful as dielectrics, particularly printed circuit boards having improved processability, good solvent and solder resistance, as well as improved morphology as compared to other polyphenylene ether-thermosetting resin compositions. More specifically, the particular polyphenylene ether resin component of this invention has a molecular weight of less than about 3,000 number average in contrast to higher molecular weight polyphenylene ethers employed in other polyphenylene ether-thermosetting resin compositions for use in preparing printed circuit boards.

Abstract: Polyphenylene ether-thermosetting resin compositions are provided that are useful as dielectrics, particularly printed circuit boards having improved processability, good solvent and solder resistance, as well as improved morphology as compared to other polyphenylene ether-thermosetting resin compositions. More specifically, the particular polyphenylene ether resin component of this invention has a molecular weight of less than about 3,000 number average in contrast to higher molecular weight polyphenylene ethers employed in other polyphenylene ether-thermosetting resin compositions for use in preparing printed circuit boards.

Abstract: Polyphenylene ethers are decolorized by contact in the melt or in solution with a hydroxy compound containing either another hydroxy group or a double or aromatic bond in a specific location in the molecule. Illustrative decolorizing compounds are benzopinacol, benzoin and acetoin.