The present invention relates to a process for the preparation of a polyurethane comprising: E1) a stage of preparation of a polyurethane having NCO endings comprising the polyaddition reaction between: i) at least one polyisocyanate; ii) at least one polyol; and iii) at least one amine having the following formula (I) or (II):

##STR00001##

and E2) the reaction of the product formed on conclusion of stage E1) with at least one (meth)acrylate or allyl monomer M comprising at least one hydroxyl functional group.

The present invention relates to a process for the preparation of a polyurethane comprising: E1) a stage of preparation of a polyurethane having NCO endings comprising the polyaddition reaction between: i) at least one polyisocyanate; ii) at least one polyol; and iii) at least one amine having the following formula (I) or (II):

##STR00001##

and E2) the reaction of the product formed on conclusion of stage E1) with at least one (meth)acrylate or allyl monomer M comprising at least one hydroxyl functional group.

Described herein are photocurable compositions,

(A) a polyester urethane acrylate, or methacrylate (A),

(B) an acrylamide, or methacrylamide component (B), and

(C) a photoinitiator (C), where the polyester urethane acrylate, or methacrylate (A) is obtained by reacting (A1) a hydroxyalkylacrylate, or hydroxyalkylmethacrylate, (A2) an aliphatic diisocyanate, an aliphatic polyisocyanate, a cycloaliphatic diisocyanate, a cycloaliphatic polyisocyanate, an aromatic diisocyanate, or an aromatic polyisocyanate, or mixtures thereof, (A3) a polyester polyol, and (A4) optionally a second polyol.

The compositions, from which cured three-dimensional shaped articles having high toughness, high E modulus and impact strength can be made, are particularly suitable for the production of three-dimensional articles by stereolithography.

Disclosed herein are anaerobically curable compositions comprising one or more polymerizable (meth)acrylate ester monomers, a redox-active metal catalyst, saccharin or a saccharin derivative, a peroxide, and a benzoyl functionalized compound, wherein the composition does not gel after about 24 hours of storage at room temperature and methods of adhering two substrates using the anaerobically curable compositions.

Disclosed herein are anaerobically curable compositions comprising one or more polymerizable (meth)acrylate ester monomers, a redox-active metal catalyst, saccharin or a saccharin derivative, a peroxide, and a benzoyl functionalized compound, wherein the composition does not gel after about 24 hours of storage at room temperature and methods of adhering two substrates using the anaerobically curable compositions.

Radiation curable compositions for coating optical fibers are disclosed herein. In an embodiment, a radiation curable composition includes a reactive oligomer component, wherein a portion of the polymerizable groups of the reactive oligomer component include methacrylate groups; a reactive diluent monomer component, wherein a portion of the polymerizable groups of the reactive diluent monomer component include acrylate groups, acrylamide groups, or N-vinyl amide groups, or combinations thereof; a photoinitiator component, and an optional additive component. Also described are methods of coating the radiation curable compositions elsewhere described, and the fiber optic coatings and cables resulting therefrom.

Radiation curable compositions for coating optical fibers are disclosed herein. In an embodiment, a radiation curable composition includes a reactive oligomer component, wherein a portion of the polymerizable groups of the reactive oligomer component include methacrylate groups; a reactive diluent monomer component, wherein a portion of the polymerizable groups of the reactive diluent monomer component include acrylate groups, acrylamide groups, or N-vinyl amide groups, or combinations thereof; a photoinitiator component, and an optional additive component. Also described are methods of coating the radiation curable compositions elsewhere described, and the fiber optic coatings and cables resulting therefrom.

A composite phase change material, including 65 to 80 parts of a phase change material and 20 to 35 parts of a binder by weight. The binder includes an acrylate monomer having a molecular weight of 50 to 300, an acrylate polymer having a molecular weight of 500 to 2000, and an initiator. The initiator in the composite phase change material can generate free radicals under the condition of ultraviolet light irradiation to initiate polymerization reactions between components of the composite phase change material, so that the composite phase change material is cured, thereby greatly accelerating a cure speed of the composite phase change material.

A composite phase change material, including 65 to 80 parts of a phase change material and 20 to 35 parts of a binder by weight. The binder includes an acrylate monomer having a molecular weight of 50 to 300, an acrylate polymer having a molecular weight of 500 to 2000, and an initiator. The initiator in the composite phase change material can generate free radicals under the condition of ultraviolet light irradiation to initiate polymerization reactions between components of the composite phase change material, so that the composite phase change material is cured, thereby greatly accelerating a cure speed of the composite phase change material.

The present invention relates to a polymerisable composition for bonding fibre units, in particular linear textiles such as filaments, yarns, twines or ropes, comprising at least one prepolymer having at least two polymerisable vinylidene groups, such as a polyurethane having at least two (meth)acrylate groups, at least one photoinitiator and at least one compound having at least one polymerisable vinylidene group with a weight average molecular weight of 70-800 g/mol. In addition, the present invention relates to a process for bonding fibre units, comprising applying the composition according to the invention to at least one fibre unit such as a filament, yarn, twine or rope and irradiation of the fibre unit thus obtained with radiation having a wavelength in the range of, for example, 100-450 nm.