US5053482A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel polyesters and their use in compostable products such as disposable diapers
Assignee: EIDP Inc
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Filing: 1990-05-11
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Granted: 1991-10-01
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Expires: 2010-05-11
Abstract
Abstract The invention provides novel polyesters, fibers and films, nonwovens from the fibers and disposable products of the polyesters such as diapers from the nonwovens. The products are degradable under the conditions typically existing in waste composting processes, have low ingredient costs and yet provide strength and toughness properties adequate for end uses such as in disposable diapers. The polyesters are based upon polyethylene terephthalate copolymerized with diethylene glycol and a 5-sulfoisophthalic acid.
Inventors
- 👤 Raymond F. Tietz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:50
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/18; A; A61; A61F; A61F13/00; A61F13/15; A61F13/15203; A61F13/15252; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/225; A61L15/26; A61L15/42; A61L15/62; C08G; C08G63/00; C08G63/02; C08G63/60; C08G63/66; C08G63/668; C08G63/672; C08G63/68; C08G63/688; C08G63/6884; C08G63/6886; C08L; C08L3/00; C08L3/02; C08L67/00; D; D01; D01F; D01F6/00; D01F6/78; D01F6/84; D01F6/86; D01F6/88; D01F6/92; A61F13/51; A61F2013/51002; A61F2013/51023; A61F2013/51035; A61F13/514; A61F13/51401; A61F2013/51409; A61F2013/51433; A61F13/53; A61F2013/530131; A61F2013/530343; A61F2013/53035; A61F13/534; A61F2013/53481; C08J2367/00; C08J2367/02; C08L2201/00; C08L2201/06; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/31504; Y10T428/31786; Y10T428/3179; Y10T442/00; Y10T442/60; Y10T442/674; Y10T442/675
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
78 words
A fiber and film forming polyester consisting essentially of recurring structural units of the formula ##STR5## wherein R is about 97 to 99.9 mole % para-phenylene and about 0.1 to 3 mole % of the sulfonate radical ##STR6## where M is an alkali metal or alkaline earth metal, and wherein G is about 60 to 80 mole % --CH 2 --CH 2 -- and about 20 to 40 mole % --(CH 2 ) 2 --O--(CH 2 )hd 2--.
Claim 2
Dependent Claim
78 words
A fiber and film forming polyester consisting essentially of recurring structural units of the formula ##STR5## wherein R is about 97 to 99.9 mole % para-phenylene and about 0.1 to 3 mole % of the sulfonate radical ##STR6## where M is an alkali metal or alkaline earth metal, and wherein G is about 60 to 80 mole % --CH 2 --CH 2 -- and about 20 to 40 mole % --(CH 2 ) 2 --O--(CH 2 )hd 2--.
Claim 3
Dependent Claim
46 words
Polyester according to claim 1 wherein R is about 98 mole % para-phenylene and about 2% of the sulfonate radical, and G is about 80 mole % --CH 2 --CH 2 -- and about 20 mole % --(CH 2 ) 2 --O--(CH 2 ) 2 --.
Claim 4
Dependent Claim
8 words
A fiber of the polyester of claim 1.
Claim 5
Dependent Claim
8 words
A fiber of the polyester of claim 2.
Claim 6
Dependent Claim
9 words
A non-woven sheet of the polyester of claim 1.
Claim 7
Dependent Claim
9 words
A non-woven sheet of the polyester of claim 2.
Claim 8
Dependent Claim
8 words
A film of the polyester of claim 1.
Claim 9
Dependent Claim
18 words
A film of the polyester of claim 1 applied as a coating to a layer of nonwoven sheet.
Claim 10
Dependent Claim
27 words
A disposable diaper which includes an absorbent body portion having on one surface thereof a water permeable nonwoven sheet of fibers of the polymer of claim 1.
Claim 11
Dependent Claim
24 words
A disposable diaper which includes an absorbent body portion having on one surface thereof a water impermeable film of the polymer of claim 1.
Claim 12
Dependent Claim
19 words
Polyester according to claim 1 wherein the amount of the sulfonate radical is about 1.5 to 2.5 mole %.
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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) | 1994-09-30 | 1995-04-01 | 1995-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-30 | 1999-04-01 | 1999-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-30 | 2003-04-01 | 2003-10-01 | $7700.00 | Window Closed / Lapsed |