Patent US3882190A successfully refreshed from Google Patents.
US3882190A
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Antistatic polyamide fiber
Assignee: Evonik Corp
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Filing: 1973-10-23
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Granted: 1975-05-06
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Expires: 1993-10-23
Abstract
Abstract An improved antistatic polyamide fiber is prepared by incorporating in the fiber about 1 to 12 percent by weight of a chain-extended propylene oxide-ethylene oxide copolymer based on ethylene diamine and about 0.5 to 8 percent by weight of a phenol compound represented by the formula: WHERE R1 is hydrogen or an alkyl radical containing 1 to 12 carbon atoms, R2 is an alkyl radical containing 4 to 18 carbon atoms, and R3 is an alkyl radical containing 4 to 18 carbon atoms. A typical preferred chain-extended agent is 4,4''methylene-bis-(cyclohexyl isocyanate).
Inventors
- 👤 Rodney Lee Wells
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:12
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/13; C08L; C08L71/00; C08L77/00; Y; Y10; Y10S; Y10S524/00; Y10S524/91
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
42 words
IN A PROCESS FOR THE FORMATION OF AN ANTISTATIC POLYAMIDE FIBER FROM A FIBER-FORMING POLYAMIDE POLYMER CONTAINING ABOUT 1 TO 12 PERCENT BY WEIGHT OF AN ANTISTATIC COMPOUND WHICH IS A CHAIN-EXTENDED REACTION PRODUCT OF A TETROL COMPOUND REPRESENTED BY THE FORMULA
Claim 2
Dependent Claim
42 words
IN A PROCESS FOR THE FORMATION OF AN ANTISTATIC POLYAMIDE FIBER FROM A FIBER-FORMING POLYAMIDE POLYMER CONTAINING ABOUT 1 TO 12 PERCENT BY WEIGHT OF AN ANTISTATIC COMPOUND WHICH IS A CHAIN-EXTENDED REACTION PRODUCT OF A TETROL COMPOUND REPRESENTED BY THE FORMULA
Claim 3
Dependent Claim
29 words
The process of claim 1 wherein 0.5 to 8 percent by weight of the phenol compound is incorporated into the fiber, based on the weight of the antistatic compound.
Claim 4
Dependent Claim
19 words
The process of claim 2 wherein the phenol compound is selected from the group consisting of 2,6-dioctadecyl-p-cresol and 2,6-dihexadecyl-p-cresol.
Claim 5
Dependent Claim
47 words
The process of claim 2 wherein the melt viscosity of the antistatic compound is about 800 to 50,000 centipoises at 100*C. and the ethylene oxide moieties make up about 10 to 90 percent of the molecular weight of the antistatic compound, and the phenol compound is 2,6-dioctadecyl-p-cresol.
Claim 6
Dependent Claim
47 words
The process of claim 2 wherein the melt viscosity of the antistatic compound is about 800 to 50,000 centipoises at 100*C. and the ethylene oxide moieties make up about 10 to 90 percent of the molecular weight of the antistatic compound, and the phenol compound is 2,6-dihexadecyl-p-cresol.
Claim 7
Dependent Claim
43 words
An antistatic polyamide fiber having less than 4 X 103 nubs per pound of fiber, said fiber containing about 1 to 12 percent by weight of an antistatic compound which is a chain-extended reaction product of a tetrol compound represented by the formula:
Claim 8
Dependent Claim
43 words
An antistatic polyamide fiber having less than 4 X 103 nubs per pound of fiber, said fiber containing about 1 to 12 percent by weight of an antistatic compound which is a chain-extended reaction product of a tetrol compound represented by the formula:
Claim 9
Dependent Claim
29 words
The fiber of claim 6 wherein 0.5 to 8 percent by weight of the phenol compound is incorporated into the fiber based on the weight of the antistatic compound.
Claim 10
Dependent Claim
19 words
The fiber of claim 7 wherein the phenol compound is selected from the group consisting of 2,6-dioctadecyl-p-cresol and 2,6-dihexadecyl-p-cresol.
Claim 11
Dependent Claim
47 words
The fiber of claim 8 wherein the melt viscosity of the antistatic compound is about 800 to 50,000 centipoises at 100*C. and the ethylene oxide moieties make up about 10 to 90 percent of the molecular weight of the antistatic compound, and the phenol compound is 2,6-dioctadecyl-p-cresol.
Claim 12
Dependent Claim
47 words
The fiber of claim 8 wherein the melt viscosity of the antistatic compound is about 800 to 50,000 centipoises at 100*C. and the ethylene oxide moieties make up about 10 to 90 percent of the molecular weight of the antistatic compound, and the phenol compound is 2,6-dihexadecyl-p-cresol.
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) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |