| 摘要 |
PCT No. PCT/KR94/00073 Sec. 371 Date Dec. 15, 1995 Sec. 102(e) Date Dec. 15, 1995 PCT Filed Jun. 16, 1994 PCT Pub. No. WO94/29603 PCT Pub. Date Dec. 22, 1994This invention relates to polymer sealant microencapsulated by polyurethane reaction and its binder solution, particularly employing threaded mechanical fasteners such as bolt-nuts, screws, pipe joints and threaded nails, etc. The microcapsules are prepared by interfacial polyurethane reaction of triisocyanate with poly-functional alcohol under the aqueous oil-droplets solution containing vinyl monomers, oligomers, redox initiators and organic solvents together as core materials of the microcapsules. The binder solution of the microcapsules is prepared by dissolving chloroprene, polyester acrylate, urethane acrylate, carboxyl- or hydroxy-modified vinylchloride-vinylacetate copolymer, coinitiators and fillers in a mixture of tetrachloroethylene and toluene.
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