Antifriction composition

Claim 2

A self-lubricating composition comprising (a) heat-treated poly(arylene sulfide) in the range of about 30 to 50 weight percent, (b) at least one solid lubricating component in the range of about 15 to 25 weight percent, (c) at least one reinforcing material in the range of about 15 to 25 weight percent, and (d) at least one filler in the range of about 10 to 20 weight percent, based on the total weight of said composition, wherein said (b) solid lubricating component is molybdenum disulfide, molybdenum diselenide, tungsten disulfide, tungsten diselenide, graphite, polytetrafluoroethylene, or mixture, wherein said (c) reinforcing material is glass fibers, asbestos fibers, carbon fibers, boron fibers, ceramic fibers, or mixture, wherein said (d) filler is calcium carbonate, titanium dioxide, barium sulfate, hydrated aluminum silicates, carbon black, red iron oxides, diatomaceous earth, admixtures thereof, or admixtures with antimony trioxide.

Claim 3

The composition according to claim 1 wherein said (a) heat-treated poly(arylene sulfide) is a poly(phenylene sulfide) characterized by a M.F. of about 25 to 1,000.

Claim 4

The composition according to claim 2 wherein said (c) reinforcing material has a fiber length of about 1 to 4 mm.

Claim 5

The composition according to claim 2 wherein said (a) poly(phenylene sulfide) is a heat-treated poly(phenylene sulfide) characterized, prior to being heat-treated, by a density in the range of about 1.1 to 1.8, a melt flow in excess of 2700, and an I.V. of 0.1 to 0.25.

Claim 6

The composition according to claim 4 wherein said (a) heat-treated poly(phenylene sulfide) is prepared by reacting p-dichlorobenzene with a mixture in which sodium sulfide is contacted with N-methylpyrrolidone, and the resulting polymer is heat-treated by heating in air at a temperature of about 450° to 550° F.

Claim 7

The composition according to claim 2 wherein said (b) solid lubricating component is said molybdeum disulfide, and said (c) reinforcing material is said glass fiber.

Claim 8

The composition according to claim 6 wherein said (d) filler is said calcium carbonate.

Claim 9

The composition according to claim 7 employing said calcium carbonate to the extent of about 17 weight percent, and said composition contains about 20 weight percent said glass fiber, about 20 weight percent said molybdenum disulfide, and about 43 weight percent said poly(phenylene sulfide).

Claim 10

The composition according to claim 6 wherein said (d) filler is said titanium dioxide.

Claim 11

The composition according to claim 9 employing said titanium dioxide to the extent of about 17 weight percent, and said composition contains about 20 weight percent said glass fiber, about 20 weight percent said molybdenum disulfide, and about 43 weight percent said poly(phenylene sulfide).

Claim 12

The composition according to claim 6 wherein said (d) filler is said barium sulfate.

Claim 13

The composition according to claim 11 employing said barium sulfate to the extent of about 17 weight percent, and said composition contains about 20 weight percent said glass fiber, about 20 weight percent said molybdenum disulfide, and about 43 weight percent said poly(phenylene sulfide).

Claim 14

The composition according to claim 6 wherein said (d) filler is said titanium dioxie and said barium sulfate.

Claim 15

The composition according to claim 13 employing said titanium dioxide to the extent of about 8.5 weight percent and 8.5 percent barium sulfate, and said composition contains about 20 weight percent said glass fiber, about 20 weight percent said molybdenum disulfide, and about 43 weight percent said poly(phenylene sulfide).

Claim 16

The composition according to claim 6 wherein said (d) filler is said titanium dioxide and calcium carbonate.

Claim 17

The composition according to claim 15 employing said titanium dioxide to the extent of about 8.5 percent, said calcium carbonate to the extent of about 8.5 weight percent, and wherein said composition contains about 20 weight percent of said glass fiber, about 20 weight percent said molybdenum disulfide, and about 43 weight percent said poly(phenylene sulfide).

Claim 18

The composition according to claim 6 wherein said (d) filler is said calcium carbonate and barium sulfate.

Claim 19

The composition according to claim 17 employing said calcium carbonate to the extent of about 8.5 percent, said barium sulfate to the extent of about 8.5 weight percent, about 20 weight percent said glass fiber, about 20 weight percent said molybdenum disulfide, and about 43 weight percent said poly(phenylene sulfide).

Claim 20

The composition according to claim 6 wherein said (d) filler is said antimony trioxide with at least one other named filler and employing said antimony trioxide up to about 18 weight percent based on the weight of said composition.

Claim 21

The composition according to claim 19 wherein said (d) filler is said antimony trioxide and calcium carbonate.

Claim 22

The composition according to claim 20 employing said antimony trioxide to the extent of about 8.5 weight percent and said calcium carbonate to the extent of about 8.5 weight percent, and wherein said composition contains about 20 weight percent said glass fiber, about 20 weight percent said molybdenum disulfide, about 43 weight percent said poly(phenylene sulfide).

Claim 23

The composition according to claim 6 wherein said (d) filler is a hydrated aluminum silicate.

Claim 24

The composition according to claim 22 wherein said hydrated aluminum silicate is a pyrophyllite or bentonite.

Claim 25

The composition according to claim 22 wherein said filler employs said hydrated aluminum silicate to the extent of about 17 weight percent, and wherein said composition contains about 20 weight percent said glass fiber, about 20 weight percent said molybdenum disulfide, and about 43 weight percent said poly(phenylene sulfide).

Claim 26

The composition according to claim 6 wherein said (d) filler is said carbon black.

Claim 27

The composition according to claim 25 wherein said filler employs said carbon black to the extent of about 17 weight percent, and wherein said composition contains about 20 weight percent said glass fiber, about 20 weight percent said molybdenum disulfide, and about 43 weight percent said poly(phenylene sulfide).

Claim 28

The composition according to claim 6 wherein said (d) filler is diatomaceous earth.

Claim 29

The composition according to claim 27 employing said diatomaceous earth to the extent of about 17 weight percent, and wherein said composition contains about 20 weight percent said glass fiber, about 20 weight percent said molybdenum disulfide, and about 43 weight percent said poly(phenylene sulfide).

Claim 30

The self-lubricating composition comprising (a) heat-treated poly(phenylene sulfide) characterized by a M.F. of about ##EQU1## as per ASTM D-1238-20 at 315.5° C./10 kg weight, in the range of about 30 to 50 weight percent, (b) molybdenum disulfide in the range of about 15 to 25 weight percent, (c) glass fibers in the range of about 15 to 25 weight percent, and (d) red iron oxide in the range of about 10 to 20 weight percent, said weight percent based on the total weight of said composition.

Claim 31

The self-lubricating composition comprising (a) heat-treated poly(phenylene sulfide) characterized by a M.F. of about ##EQU1## as per ASTM D-1238-20 at 315.5° C./10 kg weight, in the range of about 30 to 50 weight percent, (b) molybdenum disulfide in the range of about 15 to 25 weight percent, (c) glass fibers in the range of about 15 to 25 weight percent, and (d) red iron oxide in the range of about 10 to 20 weight percent, said weight percent based on the total weight of said composition.

Claim 32

The composition according to claim 29 employing said red iron oxide to the extent of about 17 weight percent, and wherein said composition contains about 20 weight percent said glass fiber, about 20 weight percent said molybdenum disulfide, and about 43 weight percent said poly(phenylene sulfide).

Claim 33

A self-lubricating composition exhibiting low wear and low coefficient of friction values consisting essentially of (a) heat-treated poly(arylene sulfide) in the range of about 30 to 50 weight percent, (b) at least one solid lubricating component in the range of about 15 to 25 weight percent and selected from the group consisting of molybdenum disulfide, graphite, molybdenum diselenide, tungsten diselenide, tungsten disulfide, polytetrafluoroethylene, or mixture. (c) at least one reinforcing material in the range of about 15 to 25 weight percent and selected from the group consisting of glass fibers, asbestos fibers, carbon fibers, boron fibers, ceramic fibers, or mixtures, and (d) at least one filler in the range of about 10 to 20 weight percent, all percentages based on the total weight of said composition, wherein said (d) filler is selected from the group consisting of calcium carbonate, titanium dioxide, barium sulfate, hydrated alumino-silicates, carbon black, red iron oxides, diatomaceous earth, admixtures thereof, and admixtures of any of these with antimony trioxide, such that wherein said filler contains said antimony trioxide, said antimony trioxide represents up to 90 weight percent of said filler.

Claim 34

A self-lubricating composition exhibiting low wear and low coefficient of friction values consisting essentially of (a) heat-treated poly(arylene sulfide) in the range of about 30 to 50 weight percent, (b) at least one solid lubricating component in the range of about 15 to 25 weight percent and selected from the group consisting of molybdenum disulfide, graphite, molybdenum diselenide, tungsten diselenide, tungsten disulfide, polytetrafluoroethylene, or mixture. (c) at least one reinforcing material in the range of about 15 to 25 weight percent and selected from the group consisting of glass fibers, asbestos fibers, carbon fibers, boron fibers, ceramic fibers, or mixtures, and (d) at least one filler in the range of about 10 to 20 weight percent, all percentages based on the total weight of said composition, wherein said (d) filler is selected from the group consisting of calcium carbonate, titanium dioxide, barium sulfate, hydrated alumino-silicates, carbon black, red iron oxides, diatomaceous earth, admixtures thereof, and admixtures of any of these with antimony trioxide, such that wherein said filler contains said antimony trioxide, said antimony trioxide represents up to 90 weight percent of said filler.

Claim 35

A self-lubricating composition prepared by the steps which comprise admixing (a) heat-treated poly(arylene sulfide) in the range of about 30 to 50 weight percent, (b) at least one solid lubricating component in the range of about 15 to 25 weight percent, which is molybdenum disulfide, molybdenum diselenide, tungsten disulfide, tungsten diselenide, graphite, polytetrafluoroethylene, or mixture, (c) at least one reinforcing material in the range of about 15 to 25 weight percent, which is glass fibers, asbestos fibers, carbon fibers, boron fibers, ceramic fibers, or mixture, and (d) at least one filler in the range of about 10 to 20 weight percent, each said weight percent based on the total weight of said composition, wherein said (d) filler is titanium dioxide, barium sulfate, calcium carbonate, carbon black, hydrated alumino-silicates, red iron oxide, diatomaceous earth, admixtures thereof, or admixtures with antimony trioxide, and molding said admixture under molding conditions at elevated temperatures.

Claim 36

A self-lubricating composition prepared by the steps which comprise admixing (a) heat-treated poly(arylene sulfide) in the range of about 30 to 50 weight percent, (b) at least one solid lubricating component in the range of about 15 to 25 weight percent, which is molybdenum disulfide, molybdenum diselenide, tungsten disulfide, tungsten diselenide, graphite, polytetrafluoroethylene, or mixture, (c) at least one reinforcing material in the range of about 15 to 25 weight percent, which is glass fibers, asbestos fibers, carbon fibers, boron fibers, ceramic fibers, or mixture, and (d) at least one filler in the range of about 10 to 20 weight percent, each said weight percent based on the total weight of said composition, wherein said (d) filler is titanium dioxide, barium sulfate, calcium carbonate, carbon black, hydrated alumino-silicates, red iron oxide, diatomaceous earth, admixtures thereof, or admixtures with antimony trioxide, and molding said admixture under molding conditions at elevated temperatures.

Claim 37

The composition according to claim 32 wherein said molding is injection molding employing a stock temperature in the range of about 600° to 650° F.

Claim 38

The composition according to claim 32 wherein said molding is compression molding and further employs elevated pressures of about 500 to 5,000 psig.

Claim 39

The composition according to claim 32 wherein said heat-treated poly(arylene sulfide) is a heat-treated poly(phenylene sulfide) characterized by a M.F. of about 25 to 100.

Claim 40

The composition according to claim 35 wherein said (b) solid lubricating component is said molybedenum disulfide, and said (c) reinforcing material is said glass fiber.

Claim 41

The composition according to claim 36 wherein said (d) filler is said calcium carbonate.

Claim 42

The composition according to claim 36 wherein said (d) filler is said titanium dioxide.

Claim 43

The composition according to claim 36 wherein said (d) filler is said barium sulfate.

Claim 44

The composition according to claim 36 wherein said (d) filler is said barium sulfate and titanium dioxide.

Claim 45

The composition according to claim 36 wherein said (d) filler is said calcium carbonate and titanium dioxide.

Claim 46

The composition according to claim 36 wherein said (d) filler is said calcium carbonate and barium sulfate.

Claim 47

The composition according to claim 36 wherein said (d) filler is said calcium and antimony trioxide.

Claim 48

The composition according to claim 36 wherein said (d) filler is said hydrated aluminum silicate.

Claim 49

The composition according to claim 44 wherein said hydrated aluminum silicate is a pyrophyllite or bentonite.

Claim 50

The composition according to claim 36 wherein said (d) filler is said carbon black.

Claim 51

The composition according to claim 36 wherein said (d) filler is said diatomaceous earth.

Claim 52

The composition according to claim 32 wherein said (a) heat-treated poly(phenylene sulfide) is prepared by reacting p-dichloro-benzene with a mixture in which sodium sulfide is contacted with N-methyl-pyrrolidone, and the resulting polymer is characterized by a melt flow in excess of 2700, and is pretreated by heating in air at a temperature of about 450° to 550° F.

Claim 53

The self-lubricating composition prepared by the steps which comprise admixing (a) heat-treated poly(arylene sulfide) characterized by M.F. of about 25 to 100 in the range of 30 to 50 weight percent, (b) molybdenum disulfide in the range of about 15 to 25 weight percent, (c) glass fibers in the range of about 15 to 25 weight percent, and (d) red iron oxide in the range of about 10 to 20 weight percent, and molding the resulting admixture under molding conditions at elevated temperatures.

Claim 54

The self-lubricating composition prepared by the steps which comprise admixing (a) heat-treated poly(arylene sulfide) characterized by M.F. of about 25 to 100 in the range of 30 to 50 weight percent, (b) molybdenum disulfide in the range of about 15 to 25 weight percent, (c) glass fibers in the range of about 15 to 25 weight percent, and (d) red iron oxide in the range of about 10 to 20 weight percent, and molding the resulting admixture under molding conditions at elevated temperatures.