Abstract: The present invention relates to a thermosetting resin composition with excellent electrical properties comprising (a) one or more terminally unsaturated urethane resins, (b) styrene, and (c) brominated styrene. The aforementioned composition finds great utility as a printed circuit board laminate suitable for use at microwave frequencies.

Abstract: The present invention relates to a thermosetting resin composition with excellent electrical properties comprising (a) one or more terminally unsaturated urethane resins, (b) styrene, and (c) brominated styrene. The aforementioned composition finds great utility as a printed circuit board laminate suitable for use at microwave frequencies.

Abstract: The present invention relates to a thermosetting resin composition with excellent electrical properties comprising (a) one or more terminally unsaturated urethane resins, (b) styrene, and (c) brominated styrene. The aforementioned composition finds great utility as a printed circuit board laminate suitable for use at microwave frequencies.

Abstract: Thermosetting polymers and the electrical laminates made therefrom are disclosed. The laminate comprises a cross-linked product of: a) one or more ethylenically unsaturated aromatic monomers, with fire retardation being optionally contributed by one halogenated monomer, b) a vinyl-terminated polybutadiene or butadiene-styrene copolymer containing either a urethane or an ester group, and c) a chemically modified polyphenylene ether resin, preferably low molecular weight chemically modified polyphenylene ether resin. It has been discovered that an unexpected combination of thermal, electrical, and mechanical properties are obtained from the composition recited herein. Therefore, the composition is ideally suited as a matrix polymer for electrical substrate applications.

Abstract: The inventive method provides a simple and economical method of manufacturing a laminate which is catalytically effective for subsequent electroless deposition thereon of metals, such as copper, and which is useful as a substrate for printed circuit boards. Advantageously, the inventive method provides an improved laminate having a substantially uniform distribution of finely divided catalytic metal, Me.sub.(0), within a crosslinked synthetic polymer impregnant. A catalytic metal-polymer complex is formed between a salt of a catalytic metal and a crosslinkable synthetic polymer, optionally containing a monomeric reactive diluent, to provide a concentrate which may be worked up into an impregnating composition for impregnating reinforcing material therewith. The complex is then destroyed and the catalytic metal, such as palladium-II, reduced to elemental metal, such as palladium metal, Pd.sub.(0), during or after crosslinking of the polymer system under conditions effective for crosslinking the polymer system.

Abstract: The inventive method provides a simple and economical method of manufacturing a laminate which is catalytically effective for subsequent electroless deposition thereon of metals, such as copper, and which is useful as a substrate for printed circuit boards. Advantageously, the inventive method provides an improved laminate having a substantially uniform distribution of finely divided catalytic metal, Me.sub.(0), within a crosslinked synthetic polymer impregnant. A catalytic metal-polymer complex is formed between a salt of a catalytic metal and a crosslinkable synthetic polymer, optionally containing a monomeric reactive diluent, to provide a concentrate which may be worked up into an impregnating composition for impregnating reinforcing material therewith. The complex is then destroyed and the catalytic metal, such as palladium-II, reduced to elemental metal, such as palladium metal, Pd.sub.(0), during or after crosslinking of the polymer system under conditions effective for crosslinking the polymer system.