CORE-SHELL PARTICLES, COMPOSITIONS INCORPORATING CORE-SHELL PARTICLES AND METHODS OF MAKING THE SAME
PROBLEM TO BE SOLVED: To provide materials and processes thereof in the art that can provide rapid adhesion of a polysulfide polymer to a substrate, thereby solving the following problem: a longstanding problem with traditional polysulfide sealant systems is that the kinetics of curing and adhesion...
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Zusammenfassung: | PROBLEM TO BE SOLVED: To provide materials and processes thereof in the art that can provide rapid adhesion of a polysulfide polymer to a substrate, thereby solving the following problem: a longstanding problem with traditional polysulfide sealant systems is that the kinetics of curing and adhesion development is undesirably slow for many manufacturing purposes.SOLUTION: This invention relates to a low viscosity polysulfide sealant composition, comprising: a curable polysulfide polymer; a crosslinking agent; and a plurality of core-shell particles. The core-shell particles comprise: a core comprising a ferromagnetic material; and a shell comprising silica treated with an organic sulfur containing compound. The shell includes the core-shell particles capable of bonding with the polysulfide polymer. The polysulfide polymer is chosen from poly(ethylformal disulfide), poly(thioether), and combinations thereof. The core-shell particles have a primary particle size of about 10 nm to about 1,000 nm, preferably about 50 nm to about 150 nm.SELECTED DRAWING: None
【課題】ポリスルフィド密封剤システムの長期にわたる問題は、硬化及び接着開発の動態が、多くの製造目的のため不所望に遅いことである。当該技術分野において、ポリスルフィドポリマーの基板への急速な接着ができる材料及びそのプロセスの提供。【解決手段】低粘度のポリスルフィド密封剤組成物であって、硬化性ポリスルフィドポリマーと、架橋剤と、複数のコアシェル粒子と、を含む組成物。コアシェル粒子は、強磁性物質を含むコアと、有機硫黄含有化合物で処理されたシリカを含むシェルと、を含み、シェルは、ポリスルフィドポリマーと結合可能であるコアシェル粒子を含む組成物。前記ポリスルフィドポリマーがポリ(エチルホルマールジスルフィド)、ポリ(チオエーテル)、及びその組み合せから選択される、組成物。前記コアシェル粒が10〜1000nm、好ましくは、50〜150nmの一次粒度を有する組成物。【選択図】なし |
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