The present teachings include powder coating including a plurality of core/shell particles. Each particle of plurality of core/shell particles has a size of from about 3 microns to about 100 microns. Each particle of the plurality of core/shell particles has a core including a cross-linkable crystalline polyester resin having a melting temperature of less than about 150° C. Each particle of the plurality of core/shell particles has a shell including a cross-linkable amorphous polyester resin having a glass transition temperature greater than 40° C. Each particle of the plurality of core/shell particles includes a thermal initiator.

A cover for a utility vault and a method for making such covers. The cover is formed from fiberglass reinforcement layers and a polymer mix matrix. The reinforcement layers include a bottom reinforcement layer, one or more edge reinforcement layers, and a top reinforcement layer. A first portion of the edge reinforcement layer overlaps a portion of the bottom reinforcement layer and a second portion of the edge reinforcement layer overlaps a portion of the top reinforcement layer. The reinforcement layers are formed from fiberglass fabric and may include fiberglass layers whose fibers are oriented quadraxially. The polymer mix impregnates the fabric layers and forms the bulk of the cover. The polymer matrix bonds the reinforcement layers so that forces applied across the top and bottom layers are communicated to the edge reinforcement layer. The polymer matrix includes a thermoset polymer resin and an expanded glass bead filler.

Disclosed, among other things, are ways to manufacture reduced density thermoplastics using rapid solid-state foaming and machines useful for the saturation of plastic. In one embodiment, a foaming process may involve saturating a semi-crystalline polymer such as Polylactic Acid (PLA) with high levels of gas, and then heating, which may produce a reduced density plastic having high levels of crystallinity. In another embodiment, a foaming process may produce layered structures in reduced density plastics with or without integral skins. In another embodiment, a foaming process may produce deep draw structures in reduced density plastics with or without integral skins. In yet another embodiment, a foaming process may utilize additives, blends, or fillers, for example. In yet another embodiment, a foaming process may involve saturating a semi-crystalline polymer such as Polylactic Acid (PLA) with high levels of gas, and then heating, which may produce a reduced density plastic having high levels of crystallinity.

A process for preparing a composite part, the process comprising: recovering unsaturated resin prepreg scrap; combining the recovered unsaturated resin prepreg scrap with a second resinous thermosetting component; and co-molding the prepreg scrap and resinous thermosetting component together under a pressure of 25 to 4000 psi and at a temperature of 100-400° F.

A preform is disclosed for producing a plastic container. The production of the preform as well as a plastic container that is produced from the preform and its production are also disclosed.

A reactive diluent system for composite resins contains a reactive diluent composition, which contains an organic phosphorus compound, and an accelerator system. The accelerator system contains at least one iron salt or complex, at least one transition metal salt or complex selected from cobalt and copper, and optionally at least one solvent.

A fiber reinforced plastic material is provided. The fiber reinforced plastic material includes a plurality of carbon fibers, and a vinyl ester resin or unsaturated polyester resin containing at least one low coefficient of linear thermal expansion (CLTE) filler.

Various methods of reshaping and recycling thermoset polymers and composites containing thermoset polymers are provided. The methods involve the bond exchange reaction of exchangeable covalent bonds in the polymer matrix with a suitable small molecule solvent in the presence of a catalyst. In some aspects, the methods are applied to a carbon fiber reinforced polymer or a thermoset polymer where the thermoset polymer matrix includes a plurality of ester bonds. Using a small molecule alcohol, the methods provide for recycling one or both of the carbon fiber and the polymer, for welding two surfaces, or for repairing a damaged surface in the materials.

Provided is a resin composition for carbon fiber-reinforced plastic molding, which contains a radical curable resin (A) having a hydroxy group, an unsaturated monomer (B), and isophorone diisocyanate. The resin composition for carbon fiber-reinforced plastic molding shows little change in viscosity over time, is excellent in storage stability, and can be used to obtain a molded article excellent in various physical properties such as flexural strength, flexural modulus, and interlayer shear strength by various molding methods. Therefore, the molded article can be suitably used in automobile members, railway vehicle members, aerospace vehicle members, watercraft members, housing equipment members, sports members, vehicle members, construction civil engineering members, casings of office automation equipment, and the like.

A resin molded body includes a resin structure, an intermediate layer including an inorganic filler and an organic resin binder and provided on a surface of at least a part of the resin structure, and a thermal sprayed ceramic coating provided on the intermediate layer. The inorganic filler is amorphous in shape and has a central particle diameter of 20 m or more and 100 m or less. The intermediate layer has a thickness of 50 m or more and 250 m or less. The central particle diameter a of the inorganic filler and the thickness b of the intermediate layer satisfy the relationship of b2a, and the inorganic filler is contained in the intermediate layer in an amount of 40% to 65% as a volume ratio.