An improved shaped composite rebar is disclosed.

To provide a glass composition for glass fiber having a low dielectric loss tangent, suppressing the occurrence of phase separation, having a reduced viscosity at high temperatures, and reducing the occurrence of striae. The glass composition for glass fiber includes 52.0 to 57.5% by mass of SiO.sub.2, 19.5 to 25.5% by mass of B.sub.2O.sub.3, 8.0 to 13.0% by mass of Al.sub.2O.sub.3, 0 to 2.0% by mass of MgO, 0 to 6.0% by mass of CaO, 0.5 to 6.5% by mass of SrO, and 0.1 to 3.0% by mass of TiO.sub.2, the ratio of Al.sub.2O.sub.3 to B.sub.2O.sub.3 is 0.35 to 0.54, and the content SI of SiO.sub.2, the content B of B.sub.2O.sub.3, the content M of MgO, the content C of CaO, the content SR of SrO, and the content T of TiO.sub.2 satisfy the following formula (1): 6.90≤100×(B/SI).sup.2×{SR/(C+SR)}.sup.2/3×{T/(M+T)}.sup.1/2≤12.30 (1).

A curable glass coating composition including 5-70 wt % aliphatic polycarbonate diol, 5-60 wt % crosslinker, 1-20 wt % extender, 4-20 wt % fatty alcohol, and 2-30 wt % crystalline or amorphous powder filler material, and optionally 2-20 wt % aliphatic polyester polyol and 2-20 wt % cycloaliphatic epoxy. The coating composition can be applied to a glass substrate and cured to form a decorative cured polyurethane coating layer on the substrate that has improved caustic and UV resistance.

A curable glass coating composition including 5-70 wt % aliphatic polycarbonate diol, 5-60 wt % crosslinker, 1-20 wt % extender, 4-20 wt % fatty alcohol, and 2-30 wt % crystalline or amorphous powder filler material, and optionally 2-20 wt % aliphatic polyester polyol and 2-20 wt % cycloaliphatic epoxy. The coating composition can be applied to a glass substrate and cured to form a decorative cured polyurethane coating layer on the substrate that has improved caustic and UV resistance.

A high modulus composite part is disclosed comprising a polymer resin; and a plurality of high-performance unidirectional glass fibers. The high-performance unidirectional glass fibers have an elastic modulus of at least 89 GPa and a tensile strength of at least 4,000 MPa, according to ASTM D2343-09. The composite part comprises a fiber weight fraction (FWF) of no more than 88% and an elastic modulus of at least 60 GPa, according to ASTM D7205.

A filament winding method and system without needing a resin dip bath are disclosed. The method comprises feeding a fiber band of a plurality of fibers onto a mandrel without dipping the fibers in a resin bath, and applying a resin onto the fiber band at or about where the fiber band contacts the mandrel or applied directly to the fiber band and then wound onto the mandrel so that the resin is between the mandrel and the fiber band at the point of contact. In some embodiments, the resin can be sprayed onto the fibers and in other embodiments, the resin can be delivered in at least one layer onto the fiber band that is then impregnated into the fiber band as the fiber band wraps around the mandrel. The fiber can comprise carbon fiber, basalt fiber, glass fibers, Kevlar fiber, polyester fiber, other fibers, or a combination thereof.

Embodiments of a curable formaldehyde-free resin, and a method for the manufacture of the curable formaldehyde-free resin are provided herein. The curable formaldehyde-free resin is provided in the form of an aqueous dispersion. The curable formalde-hyde-free resin comprises component a) a reducing sugar, component b) a polycarboxylic acid, component c) one or more polyols having a molecular weight of less than 1000 g/mol, and component d) epoxysilane. The total amount of component c) in the curable formaldehyde-free resin is between 0.5 and 10% wt. with respect to the sum of components a) and b). The amount of component d) is from 0.1% wt. to less than or equal to 2% wt. with respect to the sum of components a) and b). Further, a method for the manufacture of the curable formaldehyde-free resin according to one of the embodiments of the present disclosure is provided.

Embodiments of a curable formaldehyde-free resin, and a method for the manufacture of the curable formaldehyde-free resin are provided herein. The curable formaldehyde-free resin is provided in the form of an aqueous dispersion. The curable formalde-hyde-free resin comprises component a) a reducing sugar, component b) a polycarboxylic acid, component c) one or more polyols having a molecular weight of less than 1000 g/mol, and component d) epoxysilane. The total amount of component c) in the curable formaldehyde-free resin is between 0.5 and 10% wt. with respect to the sum of components a) and b). The amount of component d) is from 0.1% wt. to less than or equal to 2% wt. with respect to the sum of components a) and b). Further, a method for the manufacture of the curable formaldehyde-free resin according to one of the embodiments of the present disclosure is provided.

The present invention provides a fiber sizing agent composition containing a polyester resin (A) and a reactive compound (B), wherein the polyester resin (A) is a polyester resin having an HLB of 4 to 18 and a viscosity at 30° C. of 10 to 1,000,000 Pa.Math.s, the reactive compound (B) is at least one reactive compound selected from the group consisting of blocked isocyanates, tertiary amines, tertiary amine salts, quaternary ammonium salts, quaternary phosphonium salts, and phosphine compounds, and the weight ratio of the polyester resin (A) to the reactive compound (B) [(A)/(B)] in the fiber sizing agent composition is 99.9/0.1 to 10/90.

The present invention concerns an optical fibre comprising: an optical waveguide comprising a glass core surrounded by a glass cladding; a coating surrounding said optical waveguide comprising a cured polymer material comprising a polyester obtained by esterification of: a reactant A selected from an acid, a triglyceride, or a mixture of triglycerides having a C.sub.16-C.sub.24 aliphatic chain comprising at least two conjugated double bonds; and a polyol made of at least one monomer comprising at least 3 hydroxyl groups, the polyol being thermally stable up to 300° C. (reactant B). The present invention concerns also the above said polyester coating, a method for coating an optical fibre with said polyester coating and a method for obtaining predetermined mechanical properties of a coating for an optical fibre. The cured polymer forming the coating can be prepared by curing the polyester of the invention either thermally or by radiation.