A low dielectric resin composition comprises a low dielectric resin containing acid anhydride, an epoxy resin, a rigid cross-linking agent, a soft cross-linking agent, and an accelerator. Such low dielectric resin can be dissolved in organic solvent more easily than a low dielectric resin without acid anhydride, and the low dielectric resin containing acid anhydride has a better compatibility with other organic components than a low dielectric resin without acid anhydride. A low dielectric resin composition with lower dielectric constant and better properties can thus be obtained. A film and a circuit board using such resin composition are also provided.

A transparent composite material composition, comprises, based on a total amount of the transparent composite material: 90 to 99% by weight of a thermosetting urethane acrylate resin; and 1 to 10% by weight of an organic hydroperoxide initiator. Such a transparent composite material composition exhibits superior properties such as superior transparency, impact resistance, scratch resistance, and weather resistance while realizing weight reduction.

A thermosetting resin composition due to containing a modified PPE resin as a main ingredient is suited for use in making a pregreg or a copper foil substrate, when hardened, featuring a small dielectric constant (Dk), a low dielectric dissipation factor (Df) and a high Tg as well as a high resistance to heat and flame, this outstanding result is because the modified PPE resin is formed with a novel two-dimensional hardenable structure prepared to have side-chain reactive functional groups being provided in addition to those at the terminal ends of the main chain of the PPE resin thereof.

A sulfonated polyphosphazene copolymer proton exchange membrane material, and a method for preparing such membrane includes a macromolecule initiator as bromo polyphosphazene is subjected to atom transfer radical polymerization with styrene, yielding a graft copolymer, which is hydrazinolyzed with hydrazine hydrate resulting in a copolymer including a hydroxyl group. The copolymer is reacted with 1,4-butane sultone to yield a sulfonated copolymer finally. The polymer is cross-linked with 2,6-di(hydroxymethyl)-4-methyl phenol (BHMP) as a cross linking agent in the presence of methyl sulfonic acid, yielding cross-linked proton exchange membrane. Such cross-linked graft copolymer membrane has high proton conductivity, low methanol hindrance, and low cost, and has ideal effect when applied in fuel cells as proton exchange membrane material.

A transparent composite material composition, comprises, based on a total amount of the transparent composite material: 90 to 99% by weight of a thermosetting urethane acrylate resin; and 1 to 10% by weight of an organic hydroperoxide initiator. Such a transparent composite material composition exhibits superior properties such as superior transparency, impact resistance, scratch resistance, and weather resistance while realizing weight reduction.

The present disclosure provides a resin composition and an article made therefrom, and the article comprises a prepreg, a resin film, a laminate, or a printed circuit board. The resin composition comprises (A) 100 parts by weight of an unsaturated C?C double bond-containing polyphenylene ether resin and (B) 20 parts by weight to 60 parts by weight of a phosphorus-containing compound represented by Formula (1). The article has an improvement in at least one or more or all of the glass transition temperature, the dielectric constant, the dissipation factor, the flame retardancy, the percent thermal expansion at Z-axis, the water absorption rate, the interlayer bonding strength, and alkali resistance.

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The present invention relates to non-isocyanate polyurethane thermoreversible hydrogel comprising poloxamers, aliphatic di-urethanes, aliphatic di-esters and polyethylene glycol and to a method for their preparation.

Provided are: a resin fiber sheet and a prepreg which use a laminated sheet as a raw material and which achieve excellent heat resistance, dielectric constant, dielectric loss tangent and dimensional stability (little warping); and a method for producing a prepreg using the resin fiber sheet. In one embodiment of the present invention, provided is a resin fiber sheet constituted from a poly(phenylene ether) composition fiber. The poly(phenylene ether) composition fiber contains more than 0 mass % and not more than 95 mass % of a poly(phenylene ether) and a total of not less than 5 mass % and less than 100 mass % of a liquid crystal polyester and/or a syndiotactic polystyrene, and has a single fiber diameter of 1-50 m.

Foams for filling cavities and crevasses and for forming foamed products are provided. The latex foam may include an A-side containing a functionalized latex and a B-side that contains a crosslinking agent and optionally a non-functionalized latex. The A- and/or B-side contain a blowing agent package or components forming the blowing agent package. The blowing agent package may be the combination of two or more chemicals that when mixed together form a gas or a chemical compound that, when activated by heat or light, forms a gas. In an alternate embodiment, the latex foam includes a functionalized latex, an acid, and an encapsulated crosslinking agent and base. Alternatively, the spray latex foam may include a functionalized latex, a crosslinking agent, and an encapsulated dry acid and dry base. The encapsulating agent may be a protective, non-reactive shell that can be broken or melted at the time of application.

A transparent composite material composition, comprises, based on a total amount of the transparent composite material: 90 to 99% by weight of a thermosetting urethane acrylate resin; and 1 to 10% by weight of an organic hydroperoxide initiator. Such a transparent composite material composition exhibits superior properties such as superior transparency, impact resistance, scratch resistance, and weather resistance while realizing weight reduction.