TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The blowing agent is selected from water, chlorodifluoromethane, dichloromonofluoromethane, dichlorodifluoromethane, trichloromonofluoromethane, butane, pentane, cyclopentane, hexane, cyclohexane, heptane, air, carbon dioxide (CO2), nitrogen gas (N2) and its combinations. The starter comprising active hydrogen atom(s) is selected from methanol, ethanol, propanol, butanol, pentanol, hexanol, 7-30C monohydric alcohol, ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, dipropylene glycol, tripropylene glycol, neopentyl glycol, 1,3-propanediol, 1,4-butanediol, 1,2-butanediol, 1,3-butanediol, 2,3-butanediol, 1,6-hexanediol, water, glycerin, trimethylolpropane, trimethylolethane, pentaerythritol, alpha -methylglucoside, sorbitol, mannitol, hydroxymethylglucoside, hydroxypropylglucoside, sucrose, 1,4-cyclohexanediol, cyclohexanedimethanol, hydroquinone, resorcinol and its alkoxylates. Starter comprising active hydrogen atom(s) is selected from ethylene glycol, propylene glycol, glycerin, trimethylolpropane and its combinations. The alkylene oxide is selected from ethylene oxide, propylene oxide, 1,2-butylene oxide, 2,3-butylene oxide, isobutylene oxide, epichlorohydrin, cyclohexene oxide, styrene oxide, polycarboxylic anhydrides, lactones and its combinations. The alkylene oxide is selected from ethylene oxide, propylene oxide, and its combination. The component (b) further comprises (b2) one or more polyether polyols. The polyurethane resin composition further comprises one or more components selected from chain extenders, fillers, internal mold releasing agents, flame retardants, smoke suppressants, dyes, pigments, antistatic agents, antioxidants, UV stabilizers, diluents, antifoaming agents, coupling agents, surface wetting agents, leveling agents, dewatering agents, catalysts, molecular sieves and its combinations. The reinforcement material is selected from glass fibers, carbon fibers, polyester fibers, natural fibers, aramid fibers, nylon fibers, basalt fibers, boron fibers, silicon carbide fibers, asbestos fibers, whiskers, hard particles, metal wires, and its combinations. Preferred Composition: The polyether carbonate polyol has a content of incorporated CO2 in the form of carbonate units of 5-35 wt.%, based on 100 wt.% of the polyether carbonate polyol. The blowing agent has an amount of 0-0.05 wt.%, based on 100 wt.% of the isocyanate-reactive component (b). Preferred Parameters: The polyurethane resin composition has a gel time of 40 seconds to 48 hours. The polyether carbonate polyol has a functionality of 2-4. The polyether carbonate polyol has a hydroxyl number of 10-400 mg KOH/g. Preferred Process: The polyurethane composite is prepared by a process of infusion, pultrusion, filament winding, resin transfer molding, hand lay-up, compression molding, spray up molding, continuous lamination, or its combinations. EXAMPLE - No suitable example given.