The present disclosure pertains to methods and/or systems for making a SIPN and/or an IPN by physically mixing at least one vinyl functional thermoset with at least one thermoplastic resin. For example, a method of producing a resin composition comprising: mixing at least one vinyl functional thermoset resin with at least one thermoplastic resin wherein: the two resins are sufficiently miscible at a mixing viscosity of at least at least 5,000 cPs measured at the temperature of mixing and the mixing results in sufficient laminar flow such that a substantial portion of the resin mixture forms an IPN and/or a SIPN. The IPNs and/or SPINs formed have one or more superior properties over mixtures of the same resins.

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.

Provided are a composite material and a preparation method therefor. The composite material comprises: a base layer; a first plant fibre fabric located on the upper surface of the base layer; optionally, a second plant fibre fabric located on the lower surface of the base layer; and resins present in each layer. The composite material has a decorative performance and an improved mechanical performance.

The invention relates to a method for producing acetal-containing polymers, in particular polyurethane or polyester polymers, by reacting polymers comprising side chains of alkenyl ether groups containing monomer units derived from alkenyl ether polyols, with monofunctional or polyfunctional alcohols. The invention further relates to the polymers obtainable by the disclosed method, compositions containing said polymers, and the use thereof.

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 composition is made that is suitable for the manufacturing of sheet molding compounds, and a method for preparing the composition is developed. A method for making an article using the composition is developed, and an article with the composition, at least one such article being a mobility device, is made. The viscosity of a liquid mixture comprising an unsaturated polyester and at least one hollow glass body is controlled with at least one silane, a hydrolysate, an oligomer, and/or a polymer thereof.

Disclosed are biomimetic imageable polymeric materials that include a polymer or copolymer and a covalently-linked contrasting agent where the disclosed films are both bioresorbable and visible by X-ray fluoroscopic imaging and/or magnetic resonance imaging. The invention also provides methods of preparing the polymeric materials and their use in and as implantable medical devices.

The present invention relates to an aqueous polyurethaneurea dispersion, wherein the polyurethaneurea has specific formation components, and which is characterized in that it has a content of COOH groups of at least 0.75% by weight, where 0% to 35% of these groups have been neutralized, and in that 5 to 50 mol % of isocyanate groups present have been reacted with a monofunctional component. The invention further relates to the use of this dispersion as coating composition, to a fiber having a cured coating and to a composite material.

A resin film with at least 50 wt % of at least one polymerisable vinyl ester prepolymer having at least two carbon-carbon unsaturated functional groups and a curing system, the prepolymer in a concentration of at least 10 wt %, based on the weight of the polymerisable resin, and has the structure R1.sub.n-R2-R1.sub.m, wherein R1 and R1 are the same or different, n and m are each at least one and may be the same or different, and each of R1 and R1 includes a carbon-carbon unsaturation at a free end thereof remote from R2, and includes a residue of an epoxy resin, and wherein R2 is a polyfunctional chain extending linker between R1 and R1, and is derived from a polyfunctional carboxylic acid having the structure R-Fn.sub.x, where Fn is a carboxylic acid functional group, x is at least 2, and R comprises an organic moiety having aliphatic, araliphatic, cycloaliphatic, heterocyclic and/or aromatic groups, containing any type and/or combination of saturated, unsaturated and/or aromatic carbon bonds, and wherein R may be unsubstituted or substituted by functional groups and/or heteroatoms.

A fiber-reinforced composite material which comprises carbon fibers and a resin, wherein the carbon fibers have crimps and have been entangled and the fiber volume content is 30 to 80%. The fiber-reinforced composite material combines quasi-isotropy with a high fiber volume content and has little unevenness in mechanical property.