| 摘要 |
<p>1524978 Lubricants DOW CORNING CORP 14 Oct 1975 [23 Dec 1974] 41978/75 Heading C5F [Also in Division C3] A polymeric lubricant dispersion comprises: (I) 55-95% by wt. of a curable epoxy resin composition (i.e. including hardener); (II) 4-35% by wt. of a lubricant, incompatible with I; having a viscosity of 20-20,000,000 cs. at 25‹ C.; (III) 1-10% by wt. of a dispersing agent capable of maintaining II dispersed in I. III is selected from: (a) polydimethylsiloxane-organic copolymers in which the siloxane portion has M.W. #1500 and the organic portion is polyoxyethylene, polyoxypropylene or polyxoyethylene oxypropylene copolymer, having M.W. #500 and attached to the silicon portion via Si-C bonds; and (b) copolymers which are reaction products of polydimethylsiloxane, M.W. #1500, containing silicon-bonded hydrogen atoms and a hydroxylated polyoxyethylene, polyoxypropylene or oxyethylene-oxypropylene copolymer of M.W. #500. II may be an organopolysiloxane, e.g. polydimethylsiloxane, mineral oil or polybutene. On curing a self-lubricating solid is obtained in which the lubricant particles are uniformly dispersed in the epoxy resin. Uses.-Insulators for high voltage transmission (when filled with alumina); bearings and gears.</p> |
