NOVELTY - Polyurethane resin composition for preparing a polyurethane composite, comprises: (a) an organic polyisocyanate; (b) an isocyanate-reactive component comprising: (b1) 5-50 wt.% of one or more polyether carbonate polyols, based on 100 wt.% of the isocyanate-reactive component, which is prepared by addition of carbon dioxide and alkylene oxides onto a starter comprising active hydrogen atom(s) in the presence of a dual metal cyanide (DMC) catalyst; and (c) 0-0.2 wt.% of a blowing agent, based on 100 wt.% of the isocyanate-reactive component (b).    USE - The polyurethane resin composition is useful for preparing polyurethane composite, e.g. a wind turbine blade, a yacht shell, a window frame, a door frame, a ladder frame, a telegraph pole cross arm, a tent pole, a solar cell frame, a solar cell backsheet, a radome, a highway guard rail, a floor board, a pipe, a telegraph pole, an auto trunk, a luggage holder, an engine cover, a golf club, a tennis pole, a badminton pole, a bicycle frame, a surfboard, or a snowboard (all claimed).    ADVANTAGE - The polyurethane resin composition replaces a conventional polyether polyol partially with a polyether carbonate polyol to reduce the amount of the conventional polyether polyol used. Additionally, the polyurethane resin composition has a suitable pot life, such that polyurethane composite may be prepared by a compositing process, such as infusion, pultrusion, or filament winding, and the resultant polyurethane composite has a good mechanical strength and a good elongation at break.    DETAILED DESCRIPTION - Polyurethane resin composition for preparing a polyurethane composite, comprises: (a) an organic polyisocyanate; (b) an isocyanate-reactive component comprising: (b1) 5-50 wt.% of one or more polyether carbonate polyols, based on 100 wt.% of the isocyanate-reactive component, which is prepared by addition of carbon dioxide and alkylene oxides onto a starter comprising active hydrogen atom(s) in the presence of a dual metal cyanide (DMC) catalyst, where the polyol has a functionality of 2-6, a hydroxyl number in the range from 10 to 500 mg potassium hydroxide (KOH)/g, and a content of incorporated carbon dioxide in the form of carbonate units of 3-70 wt.% based on 100 wt.% of the polyether carbonate polyol; and (c) 0-0.2 wt.% of a blowing agent, based on 100 wt.% of the isocyanate-reactive component (b). INDEPENDENT CLAIMS are included for:    (1) a polyurethane composite comprising: (I) a polyurethane resin matrix prepared from the polyurethane resin composition, where the polyurethane resin matrix has a density of 0.8-1.2 kg/m3; and (II) a reinforcement material; and    (2) a process of preparing polyurethane composite comprising a polyurethane resin matrix and a reinforcement material, which involves: (I) impregnating a reinforcement material with the polyurethane resin composition; and (II) reacting the polyurethane resin composition according to claim 1 to obtain a polyurethane resin matrix; or a method for preparing a polyurethane composite which involves utilizing the polyurethane resin composition.