US4172173A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ethylene-vinyl acetate polymer binders for non-woven fabrics
Assignee: Celanese Corp
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Filing: 1976-06-30
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Granted: 1979-10-23
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Expires: 1996-06-30
Abstract
Abstract Non-woven fabric binders of ethylene-vinyl ester copolymers containing effective amounts of an alkyl polyether.
Inventors
- 👤 Louis E. Trapasso
- 👤 Charles L. Smart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:34
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/58; D04H1/64; D04H1/587; Y; Y10; Y10T; Y10T442/00; Y10T442/20; Y10T442/2352; Y10T442/2369
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
141 words
A non-woven fabric having improved flexibility and hand softness, which is formed from a web of fibers bound together by a polymer composition; said polymer composition having been prepared from an ethylene-vinyl acetate latex binder, wherein the ethylene-vinyl acetate copolymer contains about 70 to about 90 weight percent vinyl acetate, and said latex binder contains from about 35 to about 65 weight percent of colloidally-suspended ethylene-vinyl acetate, and wherein said polymer composition contains from about 5 to about 20 weight percent, based on the total polymer composition weight, of a water soluble or water dispersible polyoxypropylene/polyoxyethylene block polymer which comprises (1) a polyoxypropylene hydrophobic base of from about 2000 to about 4000 in molecular weight, and (2) polyoxyethylene hydrophilic groups at each end of the block which amount to about 10 percent to 37 weight percent of the block polymer weight.
Claim 2
Dependent Claim
141 words
A non-woven fabric having improved flexibility and hand softness, which is formed from a web of fibers bound together by a polymer composition; said polymer composition having been prepared from an ethylene-vinyl acetate latex binder, wherein the ethylene-vinyl acetate copolymer contains about 70 to about 90 weight percent vinyl acetate, and said latex binder contains from about 35 to about 65 weight percent of colloidally-suspended ethylene-vinyl acetate, and wherein said polymer composition contains from about 5 to about 20 weight percent, based on the total polymer composition weight, of a water soluble or water dispersible polyoxypropylene/polyoxyethylene block polymer which comprises (1) a polyoxypropylene hydrophobic base of from about 2000 to about 4000 in molecular weight, and (2) polyoxyethylene hydrophilic groups at each end of the block which amount to about 10 percent to 37 weight percent of the block polymer weight.
Claim 3
Dependent Claim
86 words
A non-woven fabric having improved flexibility and hand softness, which is formed from a web of fibers bound together by a polymer composition; said polymer composition having been prepared from an ethylene-vinyl acetate latex binder, wherein the ethylene-vinyl acetate copolymer contains about 70 to about 90 weight percent vinyl acetate, and said latex binder contains from about 35 to about 65 weight percent of colloidally-suspended ethylene-vinyl acetate, and wherein said polymer composition contains from about 5 to about 20 weight percent of a water-soluble 1,3-dioxolane oligomer.
Claim 4
Dependent Claim
86 words
A non-woven fabric having improved flexibility and hand softness, which is formed from a web of fibers bound together by a polymer composition; said polymer composition having been prepared from an ethylene-vinyl acetate latex binder, wherein the ethylene-vinyl acetate copolymer contains about 70 to about 90 weight percent vinyl acetate, and said latex binder contains from about 35 to about 65 weight percent of colloidally-suspended ethylene-vinyl acetate, and wherein said polymer composition contains from about 5 to about 20 weight percent of a water-soluble 1,3-dioxolane oligomer.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-10-22 | 1983-04-23 | 1983-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-22 | 1987-04-23 | 1987-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-22 | 1991-04-23 | 1991-10-23 | $7700.00 | Window Closed / Lapsed |