US4806598A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic polymer blends and nonwoven webs prepared therefrom
Assignee: Kimberly Clark Worldwide Inc
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Filing: 1986-12-22
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Granted: 1989-02-21
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Expires: 2006-12-22
Abstract
Abstract A stable, nonreactive, thermoplastic polymer blend comprising from about 10 to about 95 percent by weight of a superabsorbent, thermoplastic polymeric composition and from about 90 to about 5 percent by weight of at least one thermoplastic polymer. The superabsorbent, thermoplastic polymeric composition preferably comprises: (A) from about 86 to about 98 percent by weight, based on the total weight of the composition, of a poly(oxyethylene) diol soft segment having a weight average molecular weight in the range of from about 5,000 to about 50,000; and (B) from about 2 to about 14 percent by weight, based on the total weight of the composition, of a hard segment which has a melting point above ambient temperature and below the temperature at which decomposition of either the composition or the soft segment takes place, is essentially insoluble in water, and phase separates from the soft segment, said hard segment being selected from the group consisting of polyurethanes, polyamides, polyesters, polyureas, and combinations thereof; wherein the soft and hard segments are covalently bound together by means of urethane, amide, ester, or secondary urea linkages or combinations thereof. The blends are especially well suited for the preparation of nonwoven webs by meltblowing, coforming and spunbonding processes.
Inventors
- 👤 Michael T. Morman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:27
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/53; A61L; A61L15/00; A61L15/16; A61L15/42; A61L15/60; C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G18/28; C08G18/40; C08G18/48; C08G18/4833; C08G81/00; D; D04; D04H; D04H1/00; D04H1/40; D04H1/407; D04H1/42; D04H1/4282; D04H1/4291; D04H1/4326; D04H1/4334; D04H1/435; D04H1/4358; D04H1/4382; D04H1/43835; A61F13/20; A61F13/2002; A61F13/202; A61F2013/530131; A61F2013/530481; D04H1/43825; D04H1/43828; D04H1/43832; D04H1/43838; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10T; Y10T442/00; Y10T442/60; Y10T442/637; Y10T442/68; Y10T442/681
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
66 words
A stable, non-reactive, thermoplastic polymer blend comprising (a) from about 10 to about 95 percent by weight of superabsorbent, thermoplastic polymeric composition characterized by a poly(oxyethylene) group-containing, functional group-terminated soft segment covalently bonded to a hard segment through reaction with a third segment which may be monomeric or polymeric, and (b) from about 90 to about 5 percent by weight of at least one thermoplastic polymer.
Claim 2
Dependent Claim
66 words
A stable, non-reactive, thermoplastic polymer blend comprising (a) from about 10 to about 95 percent by weight of superabsorbent, thermoplastic polymeric composition characterized by a poly(oxyethylene) group-containing, functional group-terminated soft segment covalently bonded to a hard segment through reaction with a third segment which may be monomeric or polymeric, and (b) from about 90 to about 5 percent by weight of at least one thermoplastic polymer.
Claim 3
Dependent Claim
23 words
The blend of claim 1, in which said polymeric composition comprises from about 30 to about 90 percent by weight of said blend.
Claim 4
Dependent Claim
23 words
The blend of claim 2, in which said polymeric composition comprises from about 40 to about 75 percent by weight of said blend.
Claim 5
Dependent Claim
16 words
The blend of claim 3, in which said at least one thermoplastic polymer is a polyolefin.
Claim 6
Dependent Claim
13 words
The blend of claim 4, in which said polyolefin is polypropylene or polyethylene.
Claim 7
Dependent Claim
162 words
The blend of claim 1, in which said polymeric composition comprises: (A) from about 86 to about 98 percent by weight, based on the total weight of the composition, of a poly(oxyethylene) soft segment having a weight average molecular weight in the range of from about 5,000 to about 50,000; and (B) from about 2 to about 14 percent by weight, based on the total weight of the composition, of a hard segment which has a melting point about ambient temperature and below the temperature at which decomposition of either the composition or the soft segment takes place, is essentially insoluble in water, and phase separates from the soft segment, said hard segment being selected from the group consisting of polyurethanes, polyamides, polyesters, polyureas, and combinations thereof; wherein the soft and hard segments are covalently bound together by means of urethane, amide, ester, or secondary urea linkages or combinations thereof through reaction with a third segment which may be monomeric or polymeric.
Claim 8
Dependent Claim
162 words
The blend of claim 4, in which said polymeric composition comprises: (A) from about 86 to about 98 percent by weight, based on the total weight of the composition, of a poly(oxyethylene) soft segment having a weight average molecular weight in the range of from about 5,000 to about 50,000; and (B) from about 2 to about 14 percent by weight, based on the total weight of the composition, of a hard segment which has a melting point about ambient temperature and below the temperature at which decomposition of either the composition or the soft segment takes place, is essentially insoluble in water, and phase separates from the soft segment, said hard segment being selected from the group consisting of polyurethanes, polyamides, polyesters, polyureas, and combinations thereof; wherein the soft and hard segments are covalently bound together by means of urethane, amide, ester, or secondary urea linkages or combinations thereof through reaction with a third segment which may be monomeric or polymeric.
Claim 9
Dependent Claim
27 words
The blend of claim 7, in which the weight average molecular weight of said soft segment is in the range of from about 8,000 to about 50,000.
Claim 10
Dependent Claim
27 words
The blend of claim 8, in which the weight average molecular weight of said soft segment is in the range of from about 8,000 to about 30,000.
Claim 11
Dependent Claim
26 words
The blend of claim 9, which the weight average molecular weight of said soft segment is in the range of from about 8,000 to about 16,000.
Claim 12
Dependent Claim
25 words
The blend of claim 7, in which said soft segment is present in the range of from about 90 to about 97 percent by weight.
Claim 13
Dependent Claim
24 words
The blend of claim 11, in which said soft segment is present in the range of from about 95 to 97 percent by weight.
Claim 14
Dependent Claim
25 words
The blend of claim 7, in which said hard segment is present in the range of from about 3 to about 10 percent by weight.
Claim 15
Dependent Claim
25 words
The blend of claim 13, in which said hard segment is present in the range of from about 3 to about 5 percent by weight.
Claim 16
Dependent Claim
16 words
The blend of claim 7, in which said soft segment is derived from a poly(oxyethylene) diol.
Claim 17
Dependent Claim
13 words
The blend of claim 15, in which said hard segment is a polyurethane.
Claim 18
Dependent Claim
13 words
The blend of claim 16, in which said polyurethane is derived from 1,4-butanediol.
References Cited (Backward Citations)
US2929800A
Cited
US3016599A
Cited
US2929804A
Cited
US3557044A
Cited
US3428711A
Cited
US3632666A
Cited
US3341394A
Cited
US3639502A
Cited
US3849241A
Cited
US3783872A
Cited
US3692618A
Cited
US3755527A
Cited
US3704198A
Cited
US3822238A
Cited
US3963803A
Cited
US3891584A
Cited
US4100324A
Cited
US3939123A
Cited
US3940542A
Cited
US3939105A
Cited
US4156066A
Cited
US4156067A
Cited
US4182827A
Cited
US4209605A
Cited
US4255550A
Cited
US4315081A
Cited
US4340563A
Cited
US4528318A
Cited
US4584347A
Cited
US4670508A
Cited
GB2154886A
Cited
GB2157703A
Cited
US4622263A
Cited
US4767825A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-02-21 | 1992-08-22 | 1993-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-21 | 1996-08-22 | 1997-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-21 | 2000-08-22 | 2001-02-21 | $7700.00 | Window Closed / Lapsed |