Abstract: A method and an equipment for preparing a pultruded polyurethane composite by a polyurethane pultrusion process, and the pultruded polyurethane composite obtained by the method and use thereof are provided.

Abstract: A method for stably storing an isocyanate composition comprising A1) one or more polyisocyanates and A2) at least one free radical initiator is provided. The method comprises adding a component A3) comprising at least one free radical inhibitor into the isocyanate composition. An isocyanate composition and a polyurethane resin prepared from the isocyanate composition is also provided.

Abstract: A method for producing a Spar Cap, trailing edge or other reinforced laminate structural part of wind turbine blade, the Spar Cap, trailing edge or other reinforced laminate structural part of wind turbine blade produced by the method and its use are provided. The method for producing a Spar Cap, trailing edge or other reinforced laminate structural part of wind turbine blade improves production efficiency and saves costs.

Abstract: A method for preparing a polyurethane composite by a vacuum infusion process, a polyurethane composite prepared by said method and use thereof. The method for preparing a polyurethane composite by a vacuum infusion process of the present invention can reduce raw materials and production costs.

Abstract: The invention relates to a method of storing an isocyanate-reactive component for preparing a polyurethane composite, the stably stored isocyanate-reactive component obtained by the method, and the polyurethane composite prepared therefrom.

Abstract: The present invention relates to a method for preparing a pultruded polyurethane composite by a polyurethane pultrusion process, a pultruded polyurethane composite prepared by said method, and uses thereof. The method for preparing a pultruded polyurethane composite of the present invention employs short molds, improves production efficiency and saves costs.

Abstract: The invention relates to a method for preparing a polyurethane composite by vacuum infusion process, the composite prepared by the method and use thereof. The method according to the present invention preferably comprises the use of a polyester peel ply having a specific gram weight, a reinforced material and/or a porous medium, and the like. The polyurethane composite produced by the method according to the present invention has both good physical properties and a satisfactory outer surface without the need to separately treat the outer surface.

Abstract: The present invention relates to a composite wind turbine blade, manufacturing method and application thereof. The blade comprises blade shell, shear web, spar cap and blade root, wherein the spar cap is manufactured with polyurethane resin and the blade shell is manufactured with epoxy resin. The present invention contributes to increasing stiffness of the wind turbine blade, making the wind turbine blade lighter and shortening its production cycle, thus saving manufacturing cost thereof.

Abstract: The present application relates to a method for manufacturing fiber-reinforced plastic products. This method comprises: preparing a fiber preform on a mold; disposing first and second flow meshes and first and second demolding cloths; sealing the fiber preform to form a vacuum system by pumping; penetrating the resin through the first peel ply via the first flow mesh and impregnates the fiber preform from bottom to top; penetrating the resin through the second peel ply via the second flow mesh and impregnates the fiber preform from top to bottom; and attaining a resin-impregnated fiber perform and finally attaining fiber-reinforced plastic products.

Abstract: A pultrusion method, equipment for preparing a fiber-reinforced composite, and a fiber-reinforcement composite are provided. The pultrusion method comprises the following steps: i) preforming inner layer fibers; ii) impregnating the preformed inner layer fibers with a first resin to obtain a first preform; iii) heating and curing the first preform to obtain an inner layer profile; iv) preforming outer layer fibers together with the inner layer profile; v) impregnating the outer layer fibers with a second resin to obtain a second preform; and vi) heating and curing the second preform to obtain the fiber-reinforced composite.

Abstract: The present invention relates to a polyurethane composite material, comprising a polyurethane resin matrix prepared from a polyurethane composition, and a reinforcement material, wherein the polyurethane composition comprises: A) an isocyanate component comprising one or more organic polyisocyanates; B) an isocyanate-reactive component comprising: b1) one or more organic polyols having an amount of 21-60 wt. % based on 100% by weight of the polyurethane composition; b2) one or more (meth)acrylates comprising hydroxyl groups; and C) a radical reaction initiator; wherein the polyurethane resin matrix is prepared under such reaction conditions that the polyurethane composition undergoes addition polymerization reaction of isocyanate groups and hydroxyl groups and radical polymerization reaction simultaneously. The present invention further relates to the preparation process of the polyurethane composite material.

Abstract: The present invention relates to a polyurethane composite material, comprising a polyurethane resin matrix prepared from a polyurethane composition, and a reinforcement material, wherein the polyurethane composition comprises: A) an isocyanate component comprising one or more organic polyisocyanates; B) an isocyanate-reactive component comprising: b1) one or more organic polyols having an amount of 21-60 wt. % based on 100% by weight of the polyurethane composition; b2) one or more (meth)acrylates comprising hydroxyl groups; and C) a radical reaction initiator; wherein the polyurethane resin matrix is prepared under such reaction conditions that the polyurethane composition undergoes addition polymerization reaction of isocyanate groups and hydroxyl groups and radical polymerization reaction simultaneously. The present invention further relates to the preparation process of the polyurethane composite material.

Abstract: The present invention relates to a polyurethane composite material, comprising a polyurethane resin matrix prepared from a polyurethane composition, and a reinforcement material, wherein the polyurethane composition comprises: A) an isocyanate component comprising one or more organic polyisocyanates; B) an isocyanate-reactive component comprising: b1) one or more organic polyols having an amount of 21-60 wt. % based on 100% by weight of the polyurethane composition; b2) one or more (meth)acrylates comprising hydroxyl groups; and C) a radical reaction initiator; wherein the polyurethane resin matrix is prepared under such reaction conditions that the polyurethane composition undergoes addition polymerization reaction of isocyanate groups and hydroxyl groups and radical polymerization reaction simultaneously. The present invention further relates to the preparation process of the polyurethane composite material.

Abstract: The present application relates to a method for manufacturing fiber-reinforced plastic products. This method comprises: preparing a fiber preform on a mold; disposing first and second flow meshes and first and second demolding cloths; sealing the fiber preform to form a vacuum system by pumping; penetrating the resin through the first peel ply via the first flow mesh and impregnates the fiber preform from bottom to top; penetrating the resin through the second peel ply via the second flow mesh and impregnates the fiber preform from top to bottom; and attaining a resin-impregnated fiber perform and finally attaining fiber-reinforced plastic products.

Abstract: The present invention relates to a polyurethane composite material, comprising a polyurethane resin matrix prepared from a polyurethane composition, and a reinforcement material, wherein the polyurethane composition comprises: A) an isocyanate component comprising one or more organic polyisocyanates; B) an isocyanate-reactive component comprising: b1) one or more organic polyols having an amount of 21-60 wt. % based on 100% by weight of the polyurethane composition; b2) one or more (meth)acrylates comprising hydroxyl groups; and C) a radical reaction initiator; wherein the polyurethane resin matrix is prepared under such reaction conditions that the polyurethane composition undergoes addition polymerization reaction of isocyanate groups and hydroxyl groups and radical polymerization reaction simultaneously. The present invention further relates to the preparation process of the polyurethane composite material.