US4731067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extended shelf life water-absorbing composition which facilitates fiber formation
Assignee: CAMELOT S A Inc
•
Filing: 1986-10-06
•
Granted: 1988-03-15
•
Expires: 2006-10-06
Abstract
Abstract A copolymer of recurring units of at least one α, β-unsaturated monomer and recurring units of at least one copolymerizable comonomer comprising, in its preferred embodiment from about 20 to about 80 percent pendant carboxylic acid units and from about 80 to about 20 percent pendant carboxylate salt units, is blended with at least one monomer containing at least two hydroxyl groups to produce a water-absorbing composition upon curing. The composition is particularly suitable for fiber formation.
Inventors
- 👤 Bi Le-Khac
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:43
CPC Classifications
A; A61; A61L; A61L15/00; A61L15/16; A61L15/42; A61L15/60
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
201 words
An article of manufacture comprising a cured water-absorbing composition and a means for supporting said composition for absorption usage, wherein said water-absorbing composition comprises a blend of: (a) a copolymer containing from about 25 to about 75 mole percent recurring units of at least one α,β-unsaturated monomer bearing at least one pendant unit selected from the group consisting of carboxylic acid units and derivatives of carboxylic acid units and from about 75 to about 25 mole percent recurring units of at least one copolymerizable comonomer, wherein from about 20 to about 80 percent of the total pendant units introduced through the recurring units of the α,β-unsaturated monomer must either be carboxylic acid units or must be converted into carboxylic acid units, and wherein from about 80 to about 20 percent of the total pendant units must either be carboxylate salt units or must be converted into carboxylate metal salt units; and (b) at least one monomer containing at least two hydroxyl groups selected from the group consisting of: alkylene glycols containing 2-10 caroon atoms and their ethers; cycloalkylene glycols; Bisphenol A; hydroxy alkylene derivatives of Bisphenol A; hydroquinone; phloroglucinol; hydroxy alkylene derivatives of diphenols; glycerol; erythritol; pentaerythritol; and all natural monosaccharides.
Claim 2
Dependent Claim
201 words
An article of manufacture comprising a cured water-absorbing composition and a means for supporting said composition for absorption usage, wherein said water-absorbing composition comprises a blend of: (a) a copolymer containing from about 25 to about 75 mole percent recurring units of at least one α,β-unsaturated monomer bearing at least one pendant unit selected from the group consisting of carboxylic acid units and derivatives of carboxylic acid units and from about 75 to about 25 mole percent recurring units of at least one copolymerizable comonomer, wherein from about 20 to about 80 percent of the total pendant units introduced through the recurring units of the α,β-unsaturated monomer must either be carboxylic acid units or must be converted into carboxylic acid units, and wherein from about 80 to about 20 percent of the total pendant units must either be carboxylate salt units or must be converted into carboxylate metal salt units; and (b) at least one monomer containing at least two hydroxyl groups selected from the group consisting of: alkylene glycols containing 2-10 caroon atoms and their ethers; cycloalkylene glycols; Bisphenol A; hydroxy alkylene derivatives of Bisphenol A; hydroquinone; phloroglucinol; hydroxy alkylene derivatives of diphenols; glycerol; erythritol; pentaerythritol; and all natural monosaccharides.
Claim 3
Dependent Claim
19 words
The article of manufacture of claim 1 in which said means for supporting said composition is a disposable diaper.
Claim 4
Dependent Claim
18 words
The article of manufacture of claim 1 in which said means for supporting said composition is a tampon.
Claim 5
Dependent Claim
19 words
The article of manufacture of claim 1 in which said means for supporting said composition is a sanitary napkin.
Claim 6
Dependent Claim
21 words
The article of manufacture of claim 1 in which said means for supporting said composition is a surgical or dental sponge.
Claim 7
Dependent Claim
18 words
The article of manufacture of claim 1 in which said means for supporting said composition is a bandage.
Claim 8
Dependent Claim
22 words
The article of manufacture of claim 1 in which said composition is incorporated into said means for supporting in a fibrous form.
Claim 9
Dependent Claim
23 words
The article of manufacture of claim 1 in which said composition is incorporated into said means for supporting in the form of powder.
Claim 10
Dependent Claim
23 words
The article of manufacture of claim 1 in which said composition is incorporated into said means for supporting in the form of film.
Claim 11
Independent Claim
241 words
A method of enhancing the water absorption characteristics of an article of manufacture which comprises the step of incorporating into said article a cured water absorbing composition which comprises a blend of: (a) a copolymer containing from about 25 to about 75 mole percent recurring units of at least one α,β-unsaturated monomer bearing at least one pendant unit selected from the group consisting of carboxylic acid units and derivatives of carboxylic acid units and from about 75 to about 25 mole percent recurring units of at least one copolymerizable comonomer, wherein from about 20 to about 80 percent of the total pendant units introduced through the recurring units of the α,β-unsaturated monomer must either be carboxylic acid units or be converted into carboxylic acid units, and wherein from about 80 to about 20 percent of the total pendant units must either be carboxylate metal salt units or be converted into carboxylate metal salt units; and (b) at least one monomer containing at least two hydroxyl groups selected from the group consisting of: alkylene glycols containing 2-10 carbon atoms and their ethers; cycloalkylene glycols; Bisphenol A; hydroxy alkylene derivatives of Bisphenol A; hydroquinone; phloroglucinol; hydroxy alkylene derivatives of diphenols; glycerol; erythritol; pentaerythritol; and all natural monosaccharides, said composition being incorporated into said article in an effective amount to enhance at least one water-absorbing characteristic of said article as compared to the water-absorbing characteristics of the article in the absence of the composition.
Claim 12
Independent Claim
241 words
A method of enhancing the water absorption characteristics of an article of manufacture which comprises the step of incorporating into said article a cured water absorbing composition which comprises a blend of: (a) a copolymer containing from about 25 to about 75 mole percent recurring units of at least one α,β-unsaturated monomer bearing at least one pendant unit selected from the group consisting of carboxylic acid units and derivatives of carboxylic acid units and from about 75 to about 25 mole percent recurring units of at least one copolymerizable comonomer, wherein from about 20 to about 80 percent of the total pendant units introduced through the recurring units of the α,β-unsaturated monomer must either be carboxylic acid units or be converted into carboxylic acid units, and wherein from about 80 to about 20 percent of the total pendant units must either be carboxylate metal salt units or be converted into carboxylate metal salt units; and (b) at least one monomer containing at least two hydroxyl groups selected from the group consisting of: alkylene glycols containing 2-10 carbon atoms and their ethers; cycloalkylene glycols; Bisphenol A; hydroxy alkylene derivatives of Bisphenol A; hydroquinone; phloroglucinol; hydroxy alkylene derivatives of diphenols; glycerol; erythritol; pentaerythritol; and all natural monosaccharides, said composition being incorporated into said article in an effective amount to enhance at least one water-absorbing characteristic of said article as compared to the water-absorbing characteristics of the article in the absence of the composition.
Claim 13
Dependent Claim
15 words
The method of claim 10 in which said article of manufacture is a disposable diaper.
Claim 14
Dependent Claim
14 words
The method of claim 10 in which said article of manufacture is a tampon.
Claim 15
Dependent Claim
15 words
The method of claim 10 in which said article of manufacture is a sanitary napkin.
Claim 16
Dependent Claim
15 words
The method of claim 10 in which said article of manufacture is a disposable bandage.
Claim 17
Dependent Claim
20 words
The method of claim 10 in which said composition is incorporated into said means for supporting in a fibrous form.
Claim 18
Dependent Claim
21 words
The method of claim 10 in which said composition is incorporated into said means for supporting in the form of powder.
Claim 19
Dependent Claim
21 words
The method of claim 10 in which said composition is incorporated into said means for supporting in the form of film.
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) | 1991-03-15 | 1991-09-14 | 1992-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-15 | 1995-09-14 | 1996-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-15 | 1999-09-14 | 2000-03-15 | $7700.00 | Window Closed / Lapsed |