Patent US4869950A successfully refreshed from Google Patents.
US4869950A
Expired / Lapsed
US
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Nonwoven fibrous batt
Assignee: Dow Chemical Co
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Filing: 1987-09-14
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Granted: 1989-09-26
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Expires: 2007-09-14
Abstract
Abstract A nonwoven fibrous batt which is formed by a dry process. The batt is formed by contacting any suitable fiber with an interpolymer of vinylidene chloride and an alkyl acrylate or an alkyl methacrylate. The batt may be formed into a variety of articles.
Inventors
- 👤 Jeffrey M. Elsen
- 👤 Martin F. Debney
- 👤 Thomas J. Kling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:29
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/58; D04H1/60; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24826; Y10T428/25; Y10T428/254; Y10T428/29; Y10T428/2904; Y10T428/2905; Y10T442/00; Y10T442/60; Y10T442/69
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
157 words
A fibrous batt comprising: (a) individual fibers and an at least partially melted and resolidified bonding agent, wherein the fibers are present in an amount of from about 1 to about 95 percent by weight of batt and the bonding agent is present in an amount of from about 99 to about 5 percent by weight of batt; (b) said fibers being bonded at their intersection by melted particles of a bonding agent; (c) said bonding agent comprising (i) a vinylidene chloride interpolymer, the interpolymer being formed from a monomer mixture comprising vinylidene chloride in an amount of from about 70 to about 98 percent, based on total weight of monomer mixture, and (ii) at least one monoethylenically unsaturated monomer copolymerizable therewith in an amount of from about 30 to about 2 percent, based on total weight of monomer mixture, wherein the monoethylenically unsaturated monomer is selected from the group consisting of alkyl acrylates or alkyl methacrylates.
Claim 2
Dependent Claim
157 words
A fibrous batt comprising: (a) individual fibers and an at least partially melted and resolidified bonding agent, wherein the fibers are present in an amount of from about 1 to about 95 percent by weight of batt and the bonding agent is present in an amount of from about 99 to about 5 percent by weight of batt; (b) said fibers being bonded at their intersection by melted particles of a bonding agent; (c) said bonding agent comprising (i) a vinylidene chloride interpolymer, the interpolymer being formed from a monomer mixture comprising vinylidene chloride in an amount of from about 70 to about 98 percent, based on total weight of monomer mixture, and (ii) at least one monoethylenically unsaturated monomer copolymerizable therewith in an amount of from about 30 to about 2 percent, based on total weight of monomer mixture, wherein the monoethylenically unsaturated monomer is selected from the group consisting of alkyl acrylates or alkyl methacrylates.
Claim 3
Dependent Claim
25 words
The fibrous batt of claim 1 wherein the alkyl acrylates an alkyl methacrylates have from about 1 to about 8 carbon atoms per alkyl group.
Claim 4
Dependent Claim
25 words
The fibrous batt of claim 2 wherein the alkyl acrylates and alkyl methacrylates have from about 1 to about 4 carbon atoms per alkyl group.
Claim 5
Dependent Claim
35 words
The fibrous batt of claim 3 wherein the alkyl acrylates and alkyl methacrylates are selected from the group consisting of methyl acrylate, ethyl acrylate, methyl methacrylate, n-butyl acrylate, isobutyl acrylate, sec-butyl acrylate, and 2-ethylhexyl acrylate.
Claim 6
Dependent Claim
27 words
The fibrous batt of claim 3 wherein the alkyl acrylates and alkyl methacrylates are selected from the group consisting of methyl acrylate, ethyl acrylate, and methyl methacrylate.
Claim 7
Dependent Claim
42 words
The fibrous batt of claim 1 wherein the amount of alkyl acrylate is from about 15 to about 3 percent by weight of interpolymer and the amount of vinylidene chloride is from about 85 to about 97 percent by weight of interpolymer.
Claim 8
Dependent Claim
42 words
The fibrous batt of claim 6 wherein the amount of alkyl acrylate is from about 10 to about 4 percent by weight of interpolymer and the amount of vinylidene chloride is from about 90 to about 96 percent by weight of interpolymer.
Claim 9
Dependent Claim
47 words
The fibrous batt of claim 1 wherein the fibers are present in an amount of from about 50 to about 92 percent by weight of batt and the bonding agent is present in an amount of from about 50 to about 8 percent by weight of batt.
Claim 10
Dependent Claim
47 words
The fibrous batt of claim 8 wherein the fibers are present in an amount of from about 70 to about 89 percent by weight of batt and the bonding agent is present in an amount of from about 30 to about 11 percent by weight of batt.
Claim 11
Dependent Claim
152 words
A fibrous batt comprising: (a) individual fibers and an melted bonding agent, wherein the fibers are present in an amount of from about 1 to about 95 percent by weight of batt and the bonding agent is present in an amount of from about 99 to about 5 percent by weight of batt; (b) said fibers being bonded at their intersection by melted particles of a bonding agent; (c) said bonding agent comprising (i) a vinylidene chloride interpolymer, the interpolymer being formed from a monomer mixture comprising vinylidene chloride in an amount of from about 70 to about 98 percent, based on total weight of monomer mixture, and (ii) at least one monoethylenically unsaturated monomer copolymerizable therewith in an amount of from about 30 to about 2 percent, based on total weight of monomer mixture, wherein the monoethylenically unsaturated monomer is selected from the group consisting of alkyl acrylates or alkyl methacrylates.
Claim 12
Dependent Claim
152 words
A fibrous batt comprising: (a) individual fibers and an melted bonding agent, wherein the fibers are present in an amount of from about 1 to about 95 percent by weight of batt and the bonding agent is present in an amount of from about 99 to about 5 percent by weight of batt; (b) said fibers being bonded at their intersection by melted particles of a bonding agent; (c) said bonding agent comprising (i) a vinylidene chloride interpolymer, the interpolymer being formed from a monomer mixture comprising vinylidene chloride in an amount of from about 70 to about 98 percent, based on total weight of monomer mixture, and (ii) at least one monoethylenically unsaturated monomer copolymerizable therewith in an amount of from about 30 to about 2 percent, based on total weight of monomer mixture, wherein the monoethylenically unsaturated monomer is selected from the group consisting of alkyl acrylates or alkyl methacrylates.
References Cited (Backward Citations)
US4050977A
Cited
US4051294A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-09-25 | 1993-03-27 | 1993-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-25 | 1997-03-27 | 1997-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-25 | 2001-03-27 | 2001-09-26 | $7700.00 | Window Closed / Lapsed |