A glass composition is provided that includes about 55.0 to 60.4% by weight SiO.sub.2, about 19.0 to 25.0% by weight Al.sub.2O.sub.3, about 8.0 to 15.0% by weight MgO, about 7 to 12.0% by weight CaO, less than 0.5% by weight Li.sub.2O, 0.0 to about 1.0% by weight Na.sub.2O, and 0 to about 1.5% by weight TiO.sub.2. The glass composition has a fiberizing temperature of no greater than about 2,500° F. Glass fibers formed from the inventive composition may be used in applications that require high stiffness, and low weight. Such applications include woven fabrics for use in forming wind blades and aerospace structures.

Provided are a surface-treated glass cloth capable of enhancing insulation reliability when used to prepare a prepreg, a prepreg and a printed wiring board using the surface-treated glass cloth. The surface-treated glass cloth includes a surface treatment layer on a surface, a glass constituting the glass cloth has a composition containing 52.0 to 60.0 mass % of SiO.sub.2, 15.0 to 26.0 mass % of B.sub.2O.sub.3, 9.0 to 18.0 mass % of Al.sub.2O.sub.3, 1.0 to 8.0 mass % of MgO, 1.0 to 10.0 mass % of CaO, 0 to 6.0 mass % of SrO, 0 to 6.0 mass % of TiO.sub.2, and 0.1 to 3.0 mass % in total of F.sub.2 and Cl.sub.2, based on the total amount of the glass, the glass cloth has a surface coverage of 75.0 to 100.0% and a thickness of 8 to 95 μm, and the surface treatment layer contains a silane coupling agent having a methacrylic group and contains no surfactant.

A glass composition is provided that includes SiO.sub.2 in an amount from 50.0 to 65.0% by weight; Al.sub.2O.sub.3 in an amount from 18.0 to 23.0% by weight; CaO in an amount from 1 to 8.5% by weight; MgO in an amount from 9.0 to 14.0% by weight; Na.sub.2O in an amount from 0.0 to 1.0% by weight; K.sub.2O in an amount from 0.0 to 1.0% by weight; Li2O in an amount from 0.1 to 4.0% by weight; TiO.sub.2 in an amount from 0.0 to 2.5% by weight, Y.sub.2O.sub.3 in an amount from 0 to 10.0% by weight; La.sub.2O.sub.3 in an amount from 0 to 10.0% by weight; Ce.sub.2O.sub.3 in an amount from 0 to 5.0% by weight; and Sc.sub.2O.sub.3 in an amount from 0 to 5.0% by weight. Glass fibers formed from the inventive composition may be used in applications that require high stiffness and have elastic modulus between 88 and 115 GPa. Such applications include woven fabrics for use in forming wind turbine blades and aerospace structures.

A low-tack aqueous binder composition is disclosed that includes at least 30.0% by weight of a polymeric crosslinking agent comprising at least two carboxylic acid groups, based on the total solids content of the binder composition; 10.0% to 50.0% by weight of a polyol having at least two hydroxyl groups, based on the total solids content of the binder composition; wherein the polyol comprises a sugar alcohol, an alkanolamine, pentaerythritol, or mixtures thereof; 1.5% to 15.0% by weight of an additive blend comprising one or more process additives, based on the total solids content of the binder composition; and 0 to 3.0% by weight of a silane coupling agent, based on the total solids content of the binder composition. The aqueous binder composition has an uncured pH between 4.0 and 7.0 and an uncured a peak tack force of no greater than 80 grams at 60% binder solids.

A resin composition for coating an optical fiber is a resin composition comprising: a base resin containing an oligomer comprising urethane (meth)acrylate, a monomer, and a photopolymerization initiator; and hydrophobic zirconium oxide, wherein the content of the zirconium oxide is 0.5% by mass or more and 65% by mass or less based on the total amount of the resin composition.

Described herein are methods of producing a coated optical fiber from a primary and/or secondary coating composition that contain a reactive oligomer having an average of at least one polymerizable group, a monomer having an average of at least one polymerizable group, and a photoinitiator, wherein the photoinitiator possesses specified normalized rates of polymerization at (150) degrees Celsius and/or a potential excited triplet state with certain ionization potential values. Also described and claimed are the compositions for use therewith, including primary coating compositions and secondary coating compositions. Yet further described and claimed are the coated optical fibers produced from the methods and/or compositions elsewhere described.

The present invention relates to a method for the manufacturing of a coated panel, in particular a wall, ceiling or flooring panel for applications in outdoor areas, as well as such a panel. The method comprises the following steps: providing a carrier plate of mineral wool and/or glass wool, comprising a front side and a rear side, applying a primer onto the front side of the carrier plate, thereafter applying a liquid first oligomer in an amount of 30 to 150 g/m.sup.2 onto the front side of the carrier plate; thereafter applying a liquid second oligomer, which differs from the first oligomer, in an amount of 30 to 180 g/m.sup.2 onto the wet surface of the before applied layer of the first oligomer.

Laser waveguides, methods and systems for forming a laser waveguide are provided. The waveguide includes an inner cladding layer surrounding a central axis and a glass core surrounding and located outside of the inner cladding layer. The glass core includes a laser-active material. The waveguide includes an outer cladding layer surrounding and located outside of the glass core. The inner cladding, outer cladding and/or core may surround a hollow central channel or bore and may be annular in shape.

A glass wool which has physical properties required for a heat insulation material, can be produced industrially, can have reduced hygroscopicity, and has a novel compounding composition. The glass wool having the following glass composition: SiO.sub.2: 60.0 to 65.0% by mass inclusive, Al.sub.2O.sub.3: 0.5 to 2.0% by mass inclusive, Na.sub.2O and K.sub.2O: 13.0 to 17.0% by mass inclusive, MgO and CaO: 8.0 to 12.0% by mass inclusive, B.sub.2O.sub.3: 5.0 to 12.0% by mass inclusive, and others: a remainder.

A composition for producing a glass fiber, including the following components with corresponding percentage amounts by weight: 54.2-64% SiO.sub.2, 11-18% Al.sub.2O.sub.3, 20-25.5% CaO, 0.3-3.9% MgO, 0.1-2% of Na.sub.2O+K.sub.2O, 0.1-1.5% TiO.sub.2, and 0.1-1% total iron oxides including ferrous oxide (calculated as FeO). The weight percentage ratio C1=FeO/(iron oxides−FeO) is greater than or equal to 0.53. The total content of the above components in the composition is greater than 97%. The invention also provides a glass fiber produced using the composition and a composite material including the glass fiber.