title: Treatment of high-latency microcapsules containing an aluminium complex with an epoxy-functionalised trialkoxysilane.
abstract: Some aluminium complexes are excellent catalysts of cationic polymerisation and are used for low-temperature and fast-curing adhesive, used in electronic part mounting. Microencapsulation is a suitable technique for getting high latency of the catalysts and long shelf life of the adhesives. For the higher latency in a cycloaliphatic epoxy compound, the microcapsule surface which retained small amount of aluminium complex was coated with epoxy polymer and the effect was examined. From the X-ray photoelectron spectroscopic results, the surface was recognised to be sufficiently coated and the differential scanning calorimetric analyses showed that the coating did not significantly affect the low-temperature and fast-curing properties of adhesive. After storing the mixture of cycloaliphatic epoxy compound, coated microcapsules, triphenylsilanol and silane coupling agent for 48 h at room temperature, the increase in viscosity was only 0.01 Pa s, resulting in the excellent shelf life.
authors.affiliation: a Advanced Materials Development Department, Corporate Research & Development Division , Dexerials Corporation , Kanuma , Japan.
authors.forename: Kazunobu
authors.initials: K
authors.lastname: Kamiya
authors.affiliation: b Department of Innovation Systems Engineering, Graduate School of Engineering , Utsunomiya University , Utsunomiya , Japan.
authors.forename: Noboru
authors.initials: N
authors.lastname: Suzuki
mesh_terms: D000269:Adhesives / Q000737:chemistry; D000535:Aluminum / Q000737:chemistry*; D002214:Capsules; D056831:Coordination Complexes / Q000737:chemistry*; D004339:Drug Compounding / Q000379:methods; D004852:Epoxy Compounds / Q000737:chemistry*; D006244:Hardness; D012821:Silanes / Q000737:chemistry*; D013499:Surface Properties; D013696:Temperature
chemical_list: D000269:Adhesives; D002214:Capsules; D056831:Coordination Complexes; D004852:Epoxy Compounds; D012821:Silanes; D000535:Aluminum
keywords: Aluminium complex; cure/hardening; epoxides; microcapsule; silane coupling agent