The present invention relates to the alkoxysilane-terminated prepolymer reactions of α are preparable by least one polyether polyol, polyisocyanates and α alkoxy silanes attack petite persons isocyanate-reactive group, the polyether polyol with weight average molecular weight be 500 to 7000 grams/mol molecular weight and have ethylene oxide and propylene oxide, ratio be up to the ethylene oxide unit of 50% weight % based on polyether polyol. The present invention also provides preparation method alkoxysilane-terminated prepolymers of α of the invention, composition, multicomponent system watering can includes the alkoxysilane-terminated prepolymer of α of the invention, and molding can be by polymerizeing the prepolymer alkoxysilane-terminated by α of the present invention.
