초록 ▼

Nonmetallic bearing compositions contain a polyetherimide resin and, as modifiers and reinforcements, a fluoropolymer, such as polytetrafluoroethylene, a lubricating agent selected from the group consisting of molybdenum disulfide, graphite or a silicone fluid, molybdenum disulfide-containing lubric

Nonmetallic bearing compositions contain a polyetherimide resin and, as modifiers and reinforcements, a fluoropolymer, such as polytetrafluoroethylene, a lubricating agent selected from the group consisting of molybdenum disulfide, graphite or a silicone fluid, molybdenum disulfide-containing lubricant or any mixture thereof, and a reinforcing agent selected from the group consisting of glass fibers, carbon fibers and glass beads. The present compositions can be fabricated into a variety of shapes by injection molding, and have excellent wear resistance, load-bearing capabilities, and low coefficients of friction without the use of external lubrication.

대표청구항 ▼

A bearing composition which comprises a polyetherimide resin of the formula: [Figure] and the following modifiers and reinforcements: (a) from about 1% to about 25% by wt. of a fluoropolymer; (b) from about 1% to about 25% by wt. of a lubricating agent selected from the group consisting of silicone

A bearing composition which comprises a polyetherimide resin of the formula: [Figure] and the following modifiers and reinforcements: (a) from about 1% to about 25% by wt. of a fluoropolymer; (b) from about 1% to about 25% by wt. of a lubricating agent selected from the group consisting of silicone fluid, a molybdenum disulfide, graphite or a molybdenum disulfide-containing solid lubricant, or any mixture thereof; and (c) from 0% to about 50% of a reinforcing agent selected from the group consisting of glass fibers, carbon fibers, glass beads and mixtures thereof; wherein the above proportions are selected such that said bearing compositions contain from about 35% by wt. to about 60% by wt. polyetherimide resin and from about 40% by wt. to about 65% by wt. modifiers and reinforcements; wherein “a”represents a whole number from about 10 to about 10,000, the group －O－A1) [Figure] [Figure] [Figure] and (2) divalent organic radicals of the general formula [Figure] where X is a member selected from the class consisting of divalent radicals of the formula: [Figure] where q is 0 or 1, y is a whole number from 1 to 5 and R is a divalent organic radical selected from the class consisting of (1) aromatic hydrocarbon radicals having from 6 to 20 carbon atoms and halogenated derivatives thereof, (2) alkylene radicals and cycloalkylene radicals having from 2-20 carbon atoms, C(2-8) alkylene terminated polydiorganosiloxane, and (3) divalent radicals of the formula [Figure] where Q is a member selected from the class consisting of [Figure] where x is a whole number from 1 to 5 inclusive.