US4041002A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic resin composition
Assignee: Asahi Kasei Corp
•
Filing: 1975-08-01
•
Granted: 1977-08-09
•
Expires: 1995-08-01
Abstract
Abstract Thermoplastic resin compositions of improved lubricity and wear resistance are prepared without sacrificing the excellent moldability which is inherent in thermoplastic resins which compositions comprise a base resin, a lubricant and an ethylene-vinyl acetate copolymer.
Inventors
- 👤 Michihiro Aboshi
- 👤 Tsutomu Kakutani
- 👤 Katsumi Yoshitake
- 👤 Toshinori Koseki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:32
CPC Classifications
C; C08; C08L; C08L59/00; C08L59/02; C08K; C08K3/00; C08K3/01; C08K3/013; C08K5/00; C08K5/01; C08K5/04; C08K5/09; C08K5/10; C08K5/49; C08L23/00; C08L23/02; C08L23/04; C08L23/06; C08L91/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
64 words
A thermoplastic resin composition having excellent lubricity and wear resistance comprising from 55 to 99.5 percent by weight of thermoplastic polyacetal, from 0.3 to 25 percent by weight of a liquid lubricant which does not dissolve the resin, and from 0.2 to 20 percent by weight of an ethylene-vinyl acetate copolymer which contains from 15 to 50 percent by weight of vinyl acetate comonomer.
Claim 2
Dependent Claim
64 words
A thermoplastic resin composition having excellent lubricity and wear resistance comprising from 55 to 99.5 percent by weight of thermoplastic polyacetal, from 0.3 to 25 percent by weight of a liquid lubricant which does not dissolve the resin, and from 0.2 to 20 percent by weight of an ethylene-vinyl acetate copolymer which contains from 15 to 50 percent by weight of vinyl acetate comonomer.
Claim 3
Dependent Claim
33 words
A composition as in claim 1 wherein the lubricant is selected from the group consisting of paraffin type oils, naphthene type oils, aromatic type oils, polyalkylene glycol type oils and ester type oils.
Claim 4
Dependent Claim
23 words
A composition as in claim 1 wherein the ethylene-vinyl acetate copolymer contains from 19 to 28 percent by weight of vinyl acetate comonomer.
Claim 5
Dependent Claim
31 words
A composition as in claim 1, wherein the polyacetal resin is selected from the group consisting of acetal homopolymer and acetal copolymer containing 1 - 10 mol % of cyclic ether.
Claim 6
Dependent Claim
44 words
A composition as in claim 1, wherein the thermoplastic resin content is from 70 to 98 percent by weight, the lubricant content is from 1 to 15 percent by weight, and the ethylene-vinyl acetate copolymer content is from 1 to 15 percent by weight.
References Cited (Backward Citations)
US3010899A
Cited
US3310608A
Cited
US3375219A
Cited
US3548028A
Cited
US3702314A
Cited
US3704275A
Cited
US3657202A
Cited
US3684778A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-08 | 1981-02-07 | 1981-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-08 | 1985-02-07 | 1985-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-08 | 1989-02-07 | 1989-08-09 | $7700.00 | Window Closed / Lapsed |