| 摘要 |
Thermoset microporous polymer lubricating compositions and methods for forming the same are disclosed. Each thermoset composition disclosed includes a thermosetting polymer that is formed into a microporous matrix capable of receiving a lubricating oil in the interconnected microscopic pores of the matrix during formation thereof, with the lubricating oil being thereafter retained in the pores until released through capillary draw, externally applied forces or elevated temperatures. Thermosetting polymers are set forth utilizing a number of different thermosetting resins, among which are polyurethanes that include an isocyanate (such as a diisocyanate), a polyol (such as a polyether-based polyol or a polyester-based polyol), and a catalyst (such as an amine or a metal salt) for forming a polyurethane polymer matrix the pores of which are filled with lubricating oil (such as a mineral oil or an ester-based synthetic oil), with surface energy modifiers (such as emulsifiers and foaming agents) also being utilized in some formulations to promote interconnected pore formation. The polyurethane matrix is formed by mixing the lubricating oil, catalyst and surface energy modifiers (if used) with the polyol to form an initial mixture, thereafter mixing the initial mixture with the isocyanate to form a final mixture, and then pouring the final mixture into a mold or utilization device (such as a bearing) where the final mixture is allowed to cure to thus form the polyurethane polymer matrix the pores of which are filled with the lubricating oil.
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