The present invention aims to provide a polymerizable compound that has high storage stability without causing crystal precipitation when added to a polymerizable composition and to provide a polymerizable composition containing the polymerizable compound. A polymer film produced by polymerization of the polymerizable composition has a low haze, high thickness uniformity, low occurrence of nonuniform orientation, high surface hardness, high adhesiveness, and good appearances and fewer orientation defects even after ultraviolet irradiation. The present invention also aims to provide a polymer produced by polymerization of the polymerizable composition and an optically anisotropic body produced from the polymer.

A curable resin composition containing a blend of multifunctional benzoxazines, and composite materials derived therefrom. The benzoxazine blend contains the combination of (A) a difunctional benzoxazine component and (B) a multifunctional benzoxazine component with functionality of greater than 2. Cured matrix resins and cured composite materials containing such benzoxazine blend exhibit a significant retardation in the rate of organic solvent uptake as compared to the same cured matrix resins and composite materials without component (B).

A curable resin composition containing a blend of multifunctional benzoxazines, and composite materials derived therefrom. The benzoxazine blend contains the combination of (A) a difunctional benzoxazine component and (B) a multifunctional benzoxazine component with functionality of greater than 2. Cured matrix resins and cured composite materials containing such benzoxazine blend exhibit a significant retardation in the rate of organic solvent uptake as compared to the same cured matrix resins and composite materials without component (B).

A curable benzoxazine composition is described wherein the benzoxazine is derived from an aryl amine having a b.p.>200° C. The curable compositions are more thermally stable and have reduced weight loss and by-products upon cure.

A curable benzoxazine composition is described wherein the benzoxazine is derived from an aryl amine having a b.p.>200° C. The curable compositions are more thermally stable and have reduced weight loss and by-products upon cure.

A curable polymer composition containing: (A) a thermoset benzoxazine resin precursor component; (B) optionally, an aryl sulphone-containing benzoxazine component, and (C) a polyarylsulphone thermoplastic toughening agent, wherein in the absence of component (B), component (C) contains one or more benzoxazine pendant- and/or end-groups.

A curable polymer composition containing: (A) a thermoset benzoxazine resin precursor component; (B) optionally, an aryl sulphone-containing benzoxazine component, and (C) a polyarylsulphone thermoplastic toughening agent, wherein in the absence of component (B), component (C) contains one or more benzoxazine pendant- and/or end-groups.

A process for manufacturing a polybenzoxazine monomer, crosslinking the latter, and using the crosslinked product to form an ablative thermal protection system for a thruster nozzle or atmospheric reentry body.

A process for manufacturing a polybenzoxazine monomer, crosslinking the latter, and using the crosslinked product to form an ablative thermal protection system for a thruster nozzle or atmospheric reentry body.

A process for manufacturing a polybenzoxazine monomer, crosslinking the latter, and using the crosslinked product to form an ablative thermal protection system for a thruster nozzle or atmospheric reentry body.