US3985661A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lubricant-containing polymeric synthetic resin composition and process for preparing said composition
Assignee: Sumitomo Electric Industries Ltd
•
Filing: 1974-06-27
•
Granted: 1976-10-12
•
Expires: 1994-06-27
Abstract
Abstract A lubricant-containing synthetic resin composition, prepared by pre-mixing 2 to 40% by volume of a lubricant consisting of at least one lubricant oil and/or at least one oilinessincreasing agent, with at least one carrier which is an organic or inorganic powder having a melting point higher than the molding temperature of a base synthetic resin, a specific surface area of at least 0.3 m2/g and a limited amount of oil absorbed of at least 0.2 cc/carrier cc, and then mixing the mixture with the base synthetic resin, or mixing the lubricant, carrier and base synthetic resin simultaneously, and then molding the resulting mixture, the amount of the lubricant being not more than 10.0 times the limit amount of oil absorbed by the carrier.
Inventors
- 👤 Hirosaka Ikeda
- 👤 Masaki Ishikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:34
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/02; F16C33/04; F16C33/20; F16C33/201; C; C08; C08K; C08K9/00; C08K9/12
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
160 words
A lubricant-containing synthetic resin composition prepared by pre-mixing 2 to 40% by volume of a lubricant consisting of at least one lubricant oil, oiliness-increasing agent or a mixture thereof with at least one carrier which is an organic or inorganic powder having a melting point or a melting viscosity higher than the molding temperature of a base thermoplastic synthetic resin, a specific surface areas of at least 0.3 m 2 /g and a limited amount of oil absorbed of at least 0.2 cc per 1 cc of said carrier, and then mixing the resulting mixture with the base synthetic resin, or mixing said lubricant, carrier and base synthetic resin simultaneously in a kneader having multiaxial mixing means and then molding the resulting mixture, the amount of said lubricant added, expressed as the ratio of the volume of said lubricant to the volume of said carrier, being not more than 10.0 times the limited amount of oil absorbed by said carrier.
Claim 2
Dependent Claim
160 words
A lubricant-containing synthetic resin composition prepared by pre-mixing 2 to 40% by volume of a lubricant consisting of at least one lubricant oil, oiliness-increasing agent or a mixture thereof with at least one carrier which is an organic or inorganic powder having a melting point or a melting viscosity higher than the molding temperature of a base thermoplastic synthetic resin, a specific surface areas of at least 0.3 m 2 /g and a limited amount of oil absorbed of at least 0.2 cc per 1 cc of said carrier, and then mixing the resulting mixture with the base synthetic resin, or mixing said lubricant, carrier and base synthetic resin simultaneously in a kneader having multiaxial mixing means and then molding the resulting mixture, the amount of said lubricant added, expressed as the ratio of the volume of said lubricant to the volume of said carrier, being not more than 10.0 times the limited amount of oil absorbed by said carrier.
Claim 3
Dependent Claim
14 words
The composition of claim 1 wherein said composition contains at least one fire retardant.
Claim 4
Dependent Claim
14 words
The composition of claim 1 wherein said composition contains at least one antistatic agent.
Claim 5
Dependent Claim
13 words
The composition of claim 1 wherein said composition contains at least one antioxidant.
Claim 6
Dependent Claim
13 words
The composition of claim 2 wherein said composition contains at least one antioxidant.
Claim 7
Dependent Claim
14 words
The composition of claim 2 wherein said composition contains at least one antistatic agent.
Claim 8
Dependent Claim
13 words
The composition of claim 6 wherein said composition contains at least one antioxidant.
Claim 9
Dependent Claim
13 words
The composition of claim 3 wherein said composition contains at least one antioxidant.
Claim 10
Dependent Claim
19 words
The composition of claim 1 wherein a heated mixer including at least two rotors is used for said mixing.
Claim 11
Dependent Claim
17 words
The composition of claim 1, wherein said multiaxial mixing means is effected by at least 2 rotors.
Claim 12
Dependent Claim
17 words
The composition of claim 1, wherein said multiaxial mixing means is effected by at least 2 screws.
Claim 13
Dependent Claim
11 words
The composition of claim 10 wherein said rotors mesh each other.
Claim 14
Dependent Claim
17 words
The composition of claim 1, wherein at least two of said mixing means rotate in different directions.
Claim 15
Dependent Claim
21 words
The composition of claim 13, wherein said two mixing means rotate at a speed of at least 7 revolutions per minute.
Claim 16
Dependent Claim
15 words
The composition of claim 14, wherein said speed is at least 20 revolutions per minutes.
Claim 17
Dependent Claim
12 words
The composition of claim 1, wherein said kneader is a continuous-type kneader.
Claim 18
Dependent Claim
18 words
The composition of claim 1, wherein said kneader is a screw-type extruder with screws rotating in different directions.
Claim 19
Dependent Claim
21 words
The composition of claim 11, wherein said screws have a ratio of their length to their diameter of at least 20.
Claim 20
Dependent Claim
38 words
The composition of claim 1, wherein said oiliness-increasing agent is selected from the group consisting of a saturated fatty acid, an unsaturated fatty acid, a fatty acid ester, an aliphatic amide, a metal soap and a higher alcohol.
Claim 21
Dependent Claim
49 words
The composition of claim 1, wherein said carrier is selected from the group consisting of synthetic resins, carbon, metal oxides, metal nitrides, metal powders, sulfides and finely divided powders of calcium carbonate, magnesium carbonate, clay, talc, silica, silicates, mica, quartz, diatomaceous earth, asbestos, aluminum hydroxide, alumina and acid clay.
Claim 22
Dependent Claim
39 words
The composition of claim 1, wherein said base thermoplastic synthetic resin comprises at least one resin selected from the group consisting of polyethylene, polypropylene, acrylonitrile/butadiene/styrene copolymer, polycarbonate, polyacetal, polyamides, polyphenylene oxide, polybutylene terephthalate, polyethylene terephthalate, polyphenylene sulfide and polystyrene.
Claim 23
Dependent Claim
33 words
The composition of claim 2, wherein said fire retardant is selected from the group consisting of phosphoric acid esters, halogenated aliphatic hydrocarbons, halogenated aromatic hydrocarbons, halogenated alicyclic hydrocarbons, organotin compounds, and inorganic compounds.
Claim 24
Dependent Claim
40 words
The composition of claim 3, wherein said fire retardant is a reactive type fire retardant selected from the group consisting of tetrachlorophthalic anhydride, tetrabromophthalic anhydride, tetrabromo bisphenol A, bis-β-chlorethyl vinyl phosphate, tribromophenyl allyl ether, tribromophenol, tribromoaniline dibromopropanol, and bisphenol S.
Claim 25
Dependent Claim
57 words
The composition of claim 3, wherein said antistatic agent is selected from the group consisting of anionic compounds, cationic compounds, amphoteric compounds, polyalkylene ether adducts of carboxylic acids, alcohols or phenol of the alkyl ether type, of the alkyl ester type or of the polyethylene imine type, polyalkylene ether adducts of polyamides, acid amides and inorganic compounds.
Claim 26
Dependent Claim
27 words
The composition of claim 4, wherein said antioxidant is selected from the group consisting of phenolic compounds, amines, hydroxy and trihydroxybenzenes, benzaphenones, sulphur compounds and organophosphorous compounds.
References Cited (Backward Citations)
US3779918A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-10-12 | 1980-04-12 | 1980-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-12 | 1984-04-12 | 1984-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-12 | 1988-04-12 | 1988-10-12 | $7700.00 | Window Closed / Lapsed |