Patent US4126415A successfully refreshed from Google Patents.
US4126415A
Expired / Lapsed
US
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Antistatic carpet
Assignee: Honeywell International Inc
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Filing: 1977-10-12
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Granted: 1978-11-21
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Expires: 1997-10-12
Abstract
Abstract An antistatic pile carpet having a relatively pliable primary backing and a tufted surface, said surface being comprised of fibers selected from the group consisting of polyester and polyamide fibers having grafted thereon from 1 to 5 percent by weight of a conductive polymeric salt of a polyethylenimine having a molecular weight of 200 to 10,000 and a sulfonic acid compound of the formula <IMAGE> wherein R1, R2, R3, R4, R5 and R6 are individually hydrogen or a lower alkyl radical having 1-3 carbon atoms.
Inventors
- 👤 Marsha H. Coiner
- 👤 John C. Haylock
- 👤 Julian H. Newland
- 👤 Judd L. Schwartz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:48
CPC Classifications
D; D06; D06M; D06M14/00; D06M14/18; Y; Y10; Y10S; Y10S8/00; Y10S8/18; Y10T; Y10T428/00; Y10T428/23907; Y10T428/23986; Y10T428/23993
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
99 words
An antistatic pile carpet having a relatively pliable primary backing and a tufted surface, said surface being comprised of fibers selected from the group consisting of polyester and polyamide fibers having grafted thereon from 1 to 5 percent by weight of a conductive polymeric salt formed by reacting a polyethylenimine having a molecular weight of 200 to 10,000 and a sulfonic acid compound of the formula ##STR5## where R 1 , R 2 , R 3 , R 4 , R 5 and R 6 are individually hydrogen or a lower alkyl radical having 1 to 3 carbon atoms.
Claim 2
Dependent Claim
99 words
An antistatic pile carpet having a relatively pliable primary backing and a tufted surface, said surface being comprised of fibers selected from the group consisting of polyester and polyamide fibers having grafted thereon from 1 to 5 percent by weight of a conductive polymeric salt formed by reacting a polyethylenimine having a molecular weight of 200 to 10,000 and a sulfonic acid compound of the formula ##STR5## where R 1 , R 2 , R 3 , R 4 , R 5 and R 6 are individually hydrogen or a lower alkyl radical having 1 to 3 carbon atoms.
Claim 3
Dependent Claim
34 words
The carpet of claim 1 wherein the sulfonic acid compound has the formula ##STR6## where R 1 and R 2 are individually hydrogen or a lower alkyl radical having 1 to 3 carbon atoms.
Claim 4
Dependent Claim
14 words
The carpet of claim 1 wherein the sulfonic acid compound is 2-acrylamide-2-methylpropane sulfonic acid.
Claim 5
Dependent Claim
16 words
The carpet of claim 1 wherein the polyethylenimine has a molecular weight of 200 to 2,000.
Claim 6
Dependent Claim
16 words
The carpet of claim 1 wherein the polyethylenimine has an average molecular weight of about 600.
Claim 7
Dependent Claim
11 words
The carpet of claim 1 wherein the fibers are polyamide fibers.
Claim 8
Dependent Claim
12 words
The carpet of claim 6 wherein the polyamide fibers are polycaprolactam fibers.
Claim 9
Dependent Claim
13 words
The carpet of claim 6 wherein the polyamide fibers are polyhexamethylene adipamide fibers.
Claim 10
Dependent Claim
11 words
The carpet of claim 1 wherein the fibers are polyester fibers.
Claim 11
Dependent Claim
13 words
The carpet of claim 9 wherein the polyester fibers are polyethylene terephthalate fibers.
Claim 12
Dependent Claim
168 words
In a process for producing a pile carpet having a relatively pliable primary backing through which polyamide or polyester fibers are tufted, the improvement which comprises: (a) subjecting said carpet to a spark discharge for 1 to 100 minutes in a zone of free radical initiating gas to generate free radical sites on the fibers of said carpet; (b) subsequently exposing said carpet to oxygen or air; (c) then exposing said carpet to an aqueous solution of a conductive polymeric salt formed by reacting a polyethylenimine having a molecular weight of 200 to 10,000 with an equivalent amount of a sulfonic acid compound of the formula ##STR7## where R 1 , R 2 , R 3 , R 4 , R 5 and R 6 are individually hydrogen or a lower alkyl radical having 1 to 3 carbon atoms; and (d) then heating said carpet to a temperature of 50° C. to 150° C. to form a graft copolymer of said conductive polymeric salt and said carpet fibers.
Claim 13
Dependent Claim
168 words
In a process for producing a pile carpet having a relatively pliable primary backing through which polyamide or polyester fibers are tufted, the improvement which comprises: (a) subjecting said carpet to a spark discharge for 1 to 100 minutes in a zone of free radical initiating gas to generate free radical sites on the fibers of said carpet; (b) subsequently exposing said carpet to oxygen or air; (c) then exposing said carpet to an aqueous solution of a conductive polymeric salt formed by reacting a polyethylenimine having a molecular weight of 200 to 10,000 with an equivalent amount of a sulfonic acid compound of the formula ##STR7## where R 1 , R 2 , R 3 , R 4 , R 5 and R 6 are individually hydrogen or a lower alkyl radical having 1 to 3 carbon atoms; and (d) then heating said carpet to a temperature of 50° C. to 150° C. to form a graft copolymer of said conductive polymeric salt and said carpet fibers.
Claim 14
Dependent Claim
54 words
The process of claim 11 wherein the aqueous solution of the conductive polymeric salt contains about 5 to 25 percent by weight of said salt, and the carpet is exposed to a sufficient amount of said solution to provide 1 to 5 percent by weight of said conductive polymeric salt on the carpet fibers.
Claim 15
Dependent Claim
34 words
The process of claim 11 wherein the sulfonic acid compound has the formula ##STR8## where R 1 and R 2 are individually hydrogen or a lower alkyl radical having 1 to 3 carbon atoms.
Claim 16
Dependent Claim
14 words
The process of claim 11 wherein the sulfonic acid compound is 2-acrylamide-2-methylpropane sulfonic acid.
Claim 17
Dependent Claim
16 words
The process of claim 11 wherein the polyethylenimine has a molecular weight of 200 to 2,000.
Claim 18
Dependent Claim
11 words
The process of claim 11 wherein the fibers are polyamide fibers.
Claim 19
Dependent Claim
12 words
The process of claim 16 wherein the polyamide fibers are polycaprolactam fibers.
Claim 20
Dependent Claim
13 words
The process of claim 16 wherein the polyamide fibers are polyhexamethylene adipamide fibers.
Claim 21
Dependent Claim
11 words
The process of claim 11 wherein the fibers are polyester fibers.
Claim 22
Dependent Claim
13 words
The process of claim 19 wherein the polyester fibers are polyethylene terephthalate fibers.
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) | 1981-11-20 | 1982-05-22 | 1982-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-20 | 1986-05-22 | 1986-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-20 | 1990-05-22 | 1990-11-21 | $7700.00 | Window Closed / Lapsed |