An eco-friendly polyester molding composition and a method for manufacturing a plastic board are provided. The eco-friendly polyester molding composition includes 50 to 100 PHR of unsaturated polyester resin, 50 to 250 PHR of a filler, 50 to 200 PHR of glass fiber and 0.5 to 10 PHR of at least two initiators. The at least two initiators include a high temperature initiator and a low-to-medium temperature initiator which are mixed in a mass ratio of 0.5-4:1.

An aqueous binder composition is provided for use in the formation of fiber insulation and non-woven mats that comprises a reaction product of one or more Liquid Polyol Monomers; itaconic acid, its salts or anhydride; and a C4 to C6 polyol selected from the group consisting of pentaerythritol, trimethylol propane, neopentyl glycol, and mixtures thereof. The molar ratio of the combined alcohols (Liquid Polyol Monomers and C4 to C6 polyols) to itaconic acid is at least 2:1, wherein the molar ratio of Liquid Polyol Monomers to C4 to C6 polyols is from about 1:1 to about 30:1.

The present invention provides a SMC of which excessive thickening with time is suppressed while of which sufficient initial thickening by an isocyanate-based thickener is maintained, particularly of which a decrease in flowability at the time of molding to be easily actualized in the case of containing an aromatic vinyl compound such as styrene is suppressed, and which exhibits excellent storage stability and moldability, a molding material for obtaining the SMC, and a fiber-reinforced composite material using the SMC. The invention provides a molding material including: a matrix resin composition containing the following Component (A), the following Component (B), the following Component (D) and the following Component (E); and the following Component (C), in which a proportion of the Component (E) with respect to 100 parts by mass of a sum of the Component (A) and the Component (B) is 0.002 part by mass or more and 0.08 part by mass or less: Component (A): a compound having either or both of a hydroxyl group and a carboxyl group and a polymerizable unsaturated group, Component (B): an aromatic vinyl compound, Component (C): a reinforcing fiber bundle having a fiber length of 5 mm or more and 120 mm or less, Component (D): an isocyanate compound, and Component (E): a metal chelate compound.

Powder formulation comprising 20-75 wt % of di(4-tert-butylcyclohexyl) peroxydicarbonate and 25-80 wt % of a phlegmatizer selected from the group consisting of ethylene glycol dibenzoate, phenyl benzoate, trimethylol propane tribenzoate, dimethylsulfon, ethylene glycol ditoluate, 1,3-propanediol ditoluate, ethylene glycol 4-tert-butylbenzoate, ethylene glycol monobenzoate monotoluate, 2,3-butanediol dibenzoate, 4-methylphenyl benzoate acid ester, and combinations thereof.

The invention provides a powder pre-preg comprising as sole resin a vinyl ester resin having a Tg in the range of 5 to +30 C. and a melt viscosity @100 C. in the range of 2 to 75 dPa.Math.s, which can be used in making a composite at a temperature as low as 80 C.

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.

The presently disclosed subject matter is directed to a method of making a foam, specifically, the development of isocyanate-free foams using at least one unsaturated polyester. The at least one unsaturated polyester is a reaction product of at least one unsaturated cyclic anhydride, dicyclopentadiene, and at least one polyol. The disclosed formulation further comprises at least one reactive diluent and at least one initiator. The disclosed formulations are cured by a free radical mechanism.

The present invention discloses a method for preparation of a heat shrinking polyester film. The method includes obtaining a polyester film made from a modified composition of a polyester. The composition of polyester include one or more polyester selected from but not limited to group consisting of terephthalic acid (PET), naphthalenedicarboxylic acid (PEN), 1,4-cyclohexane-di-carboxylic acid, Polybutylene terephthalate (PBT), Polytrimethylene terephthalate (PTT) and isophthalic acid. The composition further includes an amount of Maleic anhydride as a cross linking agent, and optionally an amount of glycol. The method further includes thermally stretching the obtained polyester film in a stretching direction under a predetermined direction under a predetermined reduced temperature. Thereafter, the polyester film is cooled thereby locking the shrink properties within the polyester film.

Provided herein are methods, compositions, devices, and systems for the 3D printing of biomedical implants. In particular, methods and systems are provided for 3D printing of biomedical devices (e.g., endovascular stents) using photo-curable biomaterial inks (e.g., or methacrylated poly(diol citrate)).

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.