Functionalized silica particle and use thereof for cross-linking
申请人:Temple University-Of The Common Commonwealth System of Higher Education
公开号:US05330836A1
公开(公告)日:1994-07-19
Particulate fillers containing Si-OH groups are functionalized by treatment with a silica bonding agent. The treated particles are effectively polyfunctional, and may be used to prepare highly filled, cross-linked organopolysiloxane networks without the need for additional cross-linking agents. The functionalized particles are highly compatible with silicone fluids, particularly cyclosiloxane fluids. Compositions curable to such filled, cross-linked networks comprise the bonding agent-functionalized particles, a curable organopolysiloxane, and a catalyst for curing the organopolysiloxane.
alpha,omega-Bis(heptamethylcyclotetrasiloxanyloxy)oligodimethylsilanes have been synthesized by heterofunctional condensation of hydroxyheptamethylcyclotetrasiloxane with alpha,omega-dichloropermethyloligosilanes, Cl(Me2Si)(n)Cl (n = 1-4, or 6). The substances are characterized by mass spectrometry, Si-29-NMR, IR and UV spectroscopy. (C) 1999 Elsevier Science S.A. All rights reserved.