US3873353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antistatic fiber
Assignee: Honeywell International Inc
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Filing: 1973-03-05
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Granted: 1975-03-25
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Expires: 1993-03-05
Abstract
Abstract An improved antistatic fiber of polyamide, polyester, polyurea, polyurethane or polysulfonamide is prepared by uniformly dispersing an antistatic additive consisting of a chain-extended propylene oxide-ethylene oxide copolymer based on a diamine, in the fiber-forming polymer, forming the fiber by conventional methods, then applying to the fiber a coating of the antistatic additive. The improved antistatic fiber is especially useful for carpet manufacture. In carpet use, the antistatic additive included in the fiber improves with age, whereas the additive externally added is gradually abraded off in use; the net result is a relatively stable antistatic capability.
Inventors
- 👤 Robert Charles Wincklhofer
- 👤 Judd Leonard Schwartz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:46
CPC Classifications
C; C08; C08L; C08L81/00; C08L81/10; C08L67/00; C08L67/02; C08L75/00; C08L77/00; D; D01; D01F; D01F1/00; D01F1/02; D01F1/09; C08L2201/00; C08L2201/04; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2938; Y10T428/2964; Y10T428/2967; Y10T428/2969
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
50 words
AN ANTISTATIC FIBER SELECTED FROM THE GROUP CONSISTING 1 POLYAMIDE, POLYESTER, POLYUREA, POLYURETHANE, AND POLYSULFONAMIDE, SAID FIBER CONTAINING BETWEEN ABOUT 1 AND ABOUT 30 % BY WEIGHT OF AN ANTISTATIC ADDITIVE CONSISTING OF A PREDOMINANTLY BRANCHED, CHAIN-EXTENDED POLYMER OF THE REACTION PRODUCT OF A TETROL COMPOUND REPRESENTED BY THE FORMULA:
Claim 2
Dependent Claim
50 words
AN ANTISTATIC FIBER SELECTED FROM THE GROUP CONSISTING 1 POLYAMIDE, POLYESTER, POLYUREA, POLYURETHANE, AND POLYSULFONAMIDE, SAID FIBER CONTAINING BETWEEN ABOUT 1 AND ABOUT 30 % BY WEIGHT OF AN ANTISTATIC ADDITIVE CONSISTING OF A PREDOMINANTLY BRANCHED, CHAIN-EXTENDED POLYMER OF THE REACTION PRODUCT OF A TETROL COMPOUND REPRESENTED BY THE FORMULA:
Claim 3
Dependent Claim
25 words
The antistatic fiber of claim 1 wherein R is a difunctional radical from a lower alkyl aliphatic hydrocarbon compound containing 1 to 6 carbon atoms.
Claim 4
Dependent Claim
40 words
The polyamide fiber of claim 1 wherein the ethylene oxide moieties make up about 10 to about 90% of the molecular weight of said tetrol compound and the fiber contains between about 2 to about 10% of the antistatic additive.
Claim 5
Dependent Claim
32 words
The polyamide fiber of claim 3 wherein the fiber has a coating thereon of between 0.1 and 3% by weight of said antistatic additive, based on the weight of the finished fiber.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |