US4483976A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyester binder fibers
Assignee: Teijin Ltd
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Filing: 1983-08-17
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Granted: 1984-11-20
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Expires: 2003-08-17
Abstract
Abstract Polyester binder fibers consisting of a water-dispersible copolymerized polyester, comprising at least one dicarboxylic acid and/or an esterforming derivative thereof, a glycol and an esterforming sulfonic acid alkali metal salt composition, wherein the total glycol component contained in the above mentioned polyester contains from 5 mole percent to 20 mole percent of a composition represented by the formula H--(OCH 2 CH 2 ) n --OH, wherein n is an integer of from 2 to 13. The binder fibers are useful especially in a papermaking process.
Inventors
- 👤 Tamio Yamamoto
- 👤 Hiroshi Tamaya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:06
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/78; D01F6/86; D04; D04H; D04H1/00; D04H1/40; D04H1/54; D21; D21H; D21H13/00; D21H13/10; D21H13/20; D21H13/24
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
84 words
Polyester binder fibers consisting of a copolymerized polyester comprising at least one dicarboxylic acid and/or an esterforming derivative thereof, a glycol and an ester-forming sulfonic acid alkali metal salt composition, wherein the total glycol component contained in said polyester contains from 5 mole percent to 20 mole percent of a composition represented by the formula H--OCH 2 CH 2 ) n OH, wherein n is an integer of from 2 to 13 and wherein the binder fibers have a birefringence of less than 0.10.
Claim 2
Dependent Claim
84 words
Polyester binder fibers consisting of a copolymerized polyester comprising at least one dicarboxylic acid and/or an esterforming derivative thereof, a glycol and an ester-forming sulfonic acid alkali metal salt composition, wherein the total glycol component contained in said polyester contains from 5 mole percent to 20 mole percent of a composition represented by the formula H--OCH 2 CH 2 ) n OH, wherein n is an integer of from 2 to 13 and wherein the binder fibers have a birefringence of less than 0.10.
Claim 3
Dependent Claim
26 words
Polyester binder fibers as set forth in claim 1, wherein said dicarboxylic acid and/or an esterforming derivative thereof is terephthalic acid or an esterforming derivative thereof.
Claim 4
Dependent Claim
20 words
Polyester binder fibers as set forth in claim 1, wherein said esterforming sulfonic acid alkali metal salt composition is 5-sodiosulfoisophthalate.
Claim 5
Dependent Claim
31 words
Polyester binder fibers as set forth in claim 1, wherein the number n in said formula H--OCH 2 CH 2 ) n OH is an integer of from 2 to 5.
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) | 1987-11-20 | 1988-05-21 | 1988-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-20 | 1992-05-21 | 1992-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-20 | 1996-05-21 | 1996-11-20 | $7700.00 | Window Closed / Lapsed |