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.

An improved shaped composite rebar is disclosed.

An aqueous binder composition is provided that includes a carbohydrate and a crosslinking agent. In exemplary embodiments, the carbohydrate-based binder composition may also include a catalyst, a coupling agent, a process aid, a crosslinking density enhancer, an extender, a moisture resistant agent, a dedusting oil, a colorant, a corrosion inhibitor, a surfactant, a pH adjuster, and combinations thereof. The carbohydrate may be natural in origin and derived from renewable resources. Additionally, the carbohydrate polymer may have a dextrose equivalent (DE) number from 2 to 20. In at least one exemplary embodiment, the carbohydrate is a water-soluble polysaccharide such as dextrin or maltodextrin and the crosslinking agent is citric acid. Advantageously, the carbohydrates have a low viscosity and cure at moderate temperatures. The environmentally friendly, formaldehyde-free binder may be used in the formation of insulation materials and non-woven chopped strand mats. A method of making fibrous insulation products is also provided.

An aqueous binder composition is provided that includes a carbohydrate and a crosslinking agent. In exemplary embodiments, the carbohydrate-based binder composition may also include a catalyst, a coupling agent, a process aid, a crosslinking density enhancer, an extender, a moisture resistant agent, a dedusting oil, a colorant, a corrosion inhibitor, a surfactant, a pH adjuster, and combinations thereof. The carbohydrate may be natural in origin and derived from renewable resources. Additionally, the carbohydrate polymer may have a dextrose equivalent (DE) number from 2 to 20. In at least one exemplary embodiment, the carbohydrate is a water-soluble polysaccharide such as dextrin or maltodextrin and the crosslinking agent is citric acid. Advantageously, the carbohydrates have a low viscosity and cure at moderate temperatures. The environmentally friendly, formaldehyde-free binder may be used in the formation of insulation materials and non-woven chopped strand mats. A method of making fibrous insulation products is also provided.

An optical fiber cable comprising an optical fiber, and a jacketing layer including at least two or more layers of a jacketing inner layer and a jacketing outer layer formed in this order concentrically, wherein the jacketing layer comprises at least two or more layers of a jacketing inner layer and a jacketing outer layer formed in this order concentrically; a material constituting the jacketing inner layer is composed of a resin material having an oxygen permeability of 2.0 cc.Math.20 μm/(m.sup.2.Math.day.Math.atm) or less; a material constituting the jacketing outer layer comprises at least one selected from a polyolefin-based resin, a polybutylene terephthalate-based resin, and a fluorine-based resin containing no chlorine atom in its structure; and the following general formula (i) and (ii) are satisfied when an outer diameter of the optical fiber is denoted by A (μm), an outer diameter of the optical fiber cable is denoted by B (μm), and a thickness of the jacketing outer layer is denoted by c (μm):
900≤A≤1100  (i)
0.40≤2×c/(B−A)≤0.70  (ii).

Use of a benzoxazine resin (12) for the bonding of a monofilament (10) made of glass-resin composite including glass filaments (101) embedded in a thermosetting polyester resin (102), to a thermoplastic material (14), notably polyester; process for adhering such a monofilament to the thermoplastic material (14), including at least the following steps: —impregnating the monofilament (10) with a benzoxazine resin (12) in the liquid state; —after impregnation, heat-treating the monofilament (10) thus impregnated, so as to at least partly polymerize the benzoxazine resin (12); —depositing, onto the monofilament (10) thus adhesively coated, the thermoplastic material (14) in the molten state; —after cooling, optionally heat-treating the monofilament thus coated (R-1, R-2) to totally polymerize the benzoxazine resin (12) on contact with the thermoplastic material (14).

Multicomposite material (R1, R2) including at least one monofilament (10) made of glass-resin composite including glass filaments (101) embedded in a thermoset polyester resin (102), this monofilament being covered with at least two superposed layers of different materials, a first layer (12) arranged on the surface of the monofilament and a second layer (14) of polyester thermoplastic material sheathing the whole, characterized in that the first layer (12) is a layer of benzoxazine and/or polybenzoxazine; finished articles or semi-finished products made of rubber, such as vehicle tyres, reinforced with such a material.

Multicomposite material (R1, R2) including at least one monofilament (10) made of glass-resin composite including glass filaments (101) embedded in a thermoset polyester resin (102), characterized in that said monofilament is coated with at least one layer (12) of benzoxazine; use of such a material as reinforcer in finished articles or semi-finished products made of rubber; finished articles or semi-finished products made of rubber, such as vehicle tyres, reinforced with such a material.

Multicomposite material (R1, R2) including at least one monofilament (10) made of glass-resin composite including glass filaments (101) embedded in a thermoset polyester resin (102), characterized in that said monofilament is coated with at least one layer (12) of benzoxazine; use of such a material as reinforcer in finished articles or semi-finished products made of rubber; finished articles or semi-finished products made of rubber, such as vehicle tyres, reinforced with such a material.

Multicomposite material (R1, R2) including at least one monofilament (10) made of glass-resin composite including glass filaments (101) embedded in a thermoset polyester resin (102), characterized in that said monofilament is coated with at least one layer (12) of benzoxazine; use of such a material as reinforcer in finished articles or semi-finished products made of rubber; finished articles or semi-finished products made of rubber, such as vehicle tyres, reinforced with such a material.