▎ 摘　　要

NOVELTY - Carbon dioxide-based bi-component polyurethane thermal-conducting adhesive, comprises component A and component B in volume ratio of 1:1-2. The component A includes isocyanate terminated double ended polyurethane prepolymer, first thermally conductive filler and optional first auxiliary agent. The isocyanate double-terminated polyurethane prepolymer is obtained by nucleophilic addition reaction of modified carbon dioxide-based polycarbonate diol, castor oil polyol and polyisocyanate optionally in the presence of a first catalyst. The component B includes polyether polyols, polybutadiene polyols, small molecule polyols, second thermally conductive fillers, and optional second catalysts and second auxiliary agent. The modified carbon dioxide-based polycarbonate diol is ether compound (I), ester compound (II), and trimethoxy(6-(4-methoxy-3-methylcyclohexyl)hexyl)silane compound (III). USE - Used as carbon dioxide-based bi-component polyurethane heat-conducting adhesive. ADVANTAGE - The carbon dioxide-based bi-component polyurethane thermal-conducting bonding glue has excellent bonding strength and thermal conducting performance. DETAILED DESCRIPTION - Carbon dioxide-based bi-component polyurethane thermal-conducting adhesive, comprises component A and component B in volume ratio of 1:1-2. The component A includes isocyanate terminated double ended polyurethane prepolymer, first thermally conductive filler and optional first auxiliary agent. The isocyanate double-terminated polyurethane prepolymer is obtained by nucleophilic addition reaction of modified carbon dioxide-based polycarbonate diol, castor oil polyol and polyisocyanate optionally in the presence of a first catalyst. The component B includes polyether polyols, polybutadiene polyols, small molecule polyols, second thermally conductive fillers, and optional second catalysts and second auxiliary agent. The modified carbon dioxide-based polycarbonate diol is ether compound of formula (I), ester compound of formula (II), and trimethoxy(6-(4-methoxy-3-methylcyclohexyl)hexyl)silane compound of formula (III). An INDEPENDENT CLAIM is included for the preparation method of carbon dioxide-based bi-component polyurethane thermal-conducting adhesive. R1, R2and R3= C1-C5alkyl group. An INDEPENDENT CLAIM is also included for preparing carbon dioxide-based bi-component polyurethane thermal-conducting adhesive, comprising (i) placing the third catalyst in autoclave at 50-80℃, vacuumizing and filling the autoclave with CO2for at least 2 hours, and adding propylene oxide and 1,2- epoxy-4-vinylcyclohexane, stirring, introducing carbon dioxide into the kettle through carbon dioxide pressure regulator, and placing the high-pressure reactor in constant temperature bath at 28.5-32.0 atm for copolymerization reaction for 4-8 hours, after the reaction, cooling the autoclave to below 20℃and slowly releasing the remaining CO2 to carbon dioxide-based polycarbonate diol, (ii) adding carbon dioxide-based polycarbonate diol, 3-mercaptopropyltrialkoxysilane, free radical photoinitiator and organic solvent into the reaction kettle and stirring until the solid is completely dissolved, and then react under ultraviolet light irradiation to obtain the mercaptoene reaction product, (iii) concentrating the mercaptoene reaction product, then slowly adding into non-solvent to precipitate polymer, filtering and drying to obtain modified carbon dioxide-based polycarbonate diol.