The present invention relates to a halogen-free epoxy resin composition, a prepreg and a laminate containing the same. The halogen-free epoxy resin composition comprises 60 parts by weight of epoxy resin, from 15 to 28 parts by weight of benzoxazine resin, and from 10 to 20 parts by weight of styrene-maleic anhydride. The present invention discloses using from 15 to 28 parts by weight of benzoxazine resin and from 10 to 20 parts by weight of styrene-maleic anhydride to cure 60 parts by weight of epoxy resin, to ensure the Df stability of prepregs at different curing temperature conditions while maintaining low dielectric constant and low dielectric loss. The prepregs and laminates prepared from the resin composition have comprehensive performances, such as low dielectric constant, low dielectric loss, excellent flame retardancy, heat resistance, cohesiveness, low water absorption and moisture resistance, and are suitable for use in halogen-free multilayer circuit boards.

A thermosetting resin composition and a prepreg and a laminated board prepared therefrom. The thermosetting resin composition contains the following components in parts by weight: 50-150 parts of a cyanate; 30-100 parts of an epoxy resin; 5-70 parts of styrene-maleic anhydride; 20-100 parts of a polyphenyl ether; 30-100 parts of a halogen-free flame retardant; 0.05-5 parts of a curing accelerator; and 50-200 parts of a filler. The prepreg and laminated board prepared from the thermosetting resin composition have comprehensive performances such as a low dielectric constant, a low dielectric loss, an excellent flame retardance, heat resistance and moisture resistance, etc., and are suitable for use in a halogen-free high-frequency multilayer circuit board.

The present invention relates to a method for preparing a benzoxazine-containing resin composition and a prepreg and a laminate made therefrom. The method for preparing a benzoxazine-containing resin composition is adding an acidic filler to a benzoxazine-containing resin composition. By adding an acidic filler to the benzoxazine-containing resin composition, the present invention promotes greatly the polymerization reaction of benzoxazine and epoxy resin, reduces the curing temperature required for polymerization of benzoxazine and epoxy resin. The laminate prepared from the benzoxazine-containing resin composition, to which an acidic filler is added, has high anti-stripping stability, high glass transition temperature, low water absorption, high heat resistance, high bending strength and good processability, and can achieve low coefficient of thermal expansion.

Described herein is a method for producing an intrinsically foamed polyamide and a shaped article including the intrinsically foamed polyamide.

Provided are a sheet molding compound having good handleability and good reinforcing fiber filling properties; and a molded article having good mechanical properties and good heat resistance.

The sheet molding compound comprises a thermosetting resin composition and reinforcing fiber bundles, in which the thermosetting resin composition comprises an epoxy resin component (E) comprising a reaction product (1) of the following component (A) and the following component (B), and the following component (C). The molded article is an article obtained by press-molding the sheet molding compound.

This invention relates to flame-retardant modified maleic anhydride resins. This resin copolymer consists of styrene, maleic anhydride and, along with a halogen-free epoxy resin, interacts with a hydroxyl group to become a flame-retardant maleic anhydride copolymer that can be applied to copper clad laminate and prepreg. This composition comprises: (A) one or more epoxy resin mixtures; (B) modified styrene-maleic anhydride curing agent copolymer; (C) additives; (D) inorganic fillers. When the aggregate amount of components (A), (B) and (C) equals 100%, component (A), epoxy resin mixture, is 60%-80% in total weight, component (B), modified styrene-maleic anhydride curing agent copolymer, equals 10%-40% in total weight. This invention uses the copolymer of Styrene and Maleic anhydride to generate a flame-retardant hydroxyl group, and with the phosphorus additive, the above components eventually interact to form a flame-retardant modified maleic anhydride copolymer curing agent.

The invention relates to a fibre-reinforced composite (K) comprising: (A) 50 wt.-%, based on the total weight of the fibre-reinforced composite (K), of at least one continuous fibrous reinforcement material; and (B) <50 wt.-%, based on the total weight of the fibre-reinforced composite (K), of at least one substantially amorphous matrix polymer composition; wherein the at least one substantially amorphous matrix polymer composition (B) comprises >0 and 3 wt.-%, derived from monomer moieties which are appropriate to interact with the surface of the fibrous reinforcement material (A), in particular of repeating units derived from maleic acid anhydride or maleic acid, and wherein less than 10% of the number of the reinforcement fibres present at a fracture surface of the fibre-reinforced composite (K) protrude from the fracture surface with a length of more than 5 times the diameter of the fibre.

The invention relates to the use of a fibre-reinforced composite (K) in a thermoforming process. Moreover, a process for thermoforming a fibre-reinforced composite (K) to a molded body (M) is disclosed, the process comprising at least the following steps: (i) Providing a fibre-reinforced composite (K) as described herein; (ii) Heating the fibre-reinforced composite (K) to a temperature (T3) at which the at least one substantially amorphous matrix polymer composition (B) is substantially softened; (iii) Thermoforming the fibre-reinforced composition (K) in a mold at a mold surface temperature (T4) in order to obtain a molded body (M); (iv) Releasing the molded body (M) from the mold; wherein the mold surface temperature (T4) is 50 C.

The invention relates to fibre-reinforced composite (K) comprising (based on the total weight of the fibre-reinforced composite (K)): (A) 50 wt.-% of at least one continuous fibrous reinforcement material; (B) <50 wt.-% of at least one substantially amorphous matrix polymer composition comprising (based on the total weight of the matrix polymer composition (B)): (B1) 60 to 80 wt.-% of at least one copolymer of styrene and/or -methyl styrene and acrylonitrile having a number average molecular weight Mn of 30,000 to 100,000 g/mol; and (B2) 20 to 40 wt.-% of at least one copolymer of styrene, acrylonitrile, maleic anhydride and/or maleic acid having a number average molecular weight Mn of 30,000 to 100,000 g/mol; wherein the matrix polymer composition (B) has a glass transition temperature (Tg) of at least 100 C. and a melt volume-flow rate (MVR (220/10) determined according to ISO 1133) of 10 to 90 mL/10 min.

The present invention relates to a liquid (meth)acrylic syrup for impregnating a fibrous substrate. The present invention relates in particular to a viscous liquid syrup mainly containing methacrylic or acrylic components. The invention also relates to a process for manufacturing such a syrup. The invention also relates to a process for impregnating a fibrous substrate comprising long glass fibers with said viscous liquid syrup. The invention also relates to a fibrous substrate preimpregnated with said syrup, which is useful for manufacturing transparent parts especially for the building sector. The present invention also relates to a manufacturing process for manufacturing transparent parts obtained via this process.