US5296282A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Degradable repellant coated articles
Assignee: Ecological Chemical Products
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Filing: 1991-08-12
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Granted: 1994-03-22
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Expires: 2011-08-12
Abstract
Abstract Shaped articles having a substrate of a degradable synthetic polymeric material and a discontinuous liquid repellant hydrophobic and/or oleophobic surface layer.
Inventors
- 👤 Glenn R. Evers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:05
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/10; B32B27/12; B32B27/30; B32B27/306; B32B27/36; B65; B65D; B65D65/00; B65D65/38; B65D65/46; B65D65/466; C; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; D; D06; D06N; D06N3/00; D06N3/12; D06N3/121; D06N3/18; D06N3/183; D06N3/186; B32B2307/00; B32B2307/70; B32B2307/716; B32B2307/7163; B32B2307/73; B32B2317/00; B32B2317/12; B32B2439/00; B32B2439/70; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582; Y10; Y10S; Y10S220/00; Y10S220/30; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24372; Y10T428/24405; Y10T428/24802; Y10T428/24851; Y10T428/24893; Y10T428/24934; Y10T428/31504; Y10T428/3154; Y10T428/31544; Y10T428/31971; Y10T428/31993
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
144 words
An article comprising: (a) a substrate comprising a poly(hydroxy acid) selected from the group consisting of (1) poly(lactic acid), (2) poly(glycolic acid), (3) copolymers of lactic acid and glycolic acid, and (4) copolymers of lactic acid with a monomer selected from the group consisting of epsilon-caprolactone, beta-propiolactone, alpha,alpha-dimethyl-beta-propiolactone, and dodecanolactone; the substrate comprising at least one surface; (b) a surface layer of a repellant material on at least one surface of the substrate, wherein the surface layer is: (1) capable of preventing aqueous media from wetting the substrate; (2) substantially discontinuous, giving coated and uncoated substrate areas, the coated areas comprising at least 80% of the substrate surface bearing the surface layer; and (3) sufficiently discontinuous to permit biodegradation of the substrate or penetration of water vapor into the substrate; wherein the repellant material has a critical surface tension of 5 to 54 dynes/cm.
Claim 2
Dependent Claim
144 words
An article comprising: (a) a substrate comprising a poly(hydroxy acid) selected from the group consisting of (1) poly(lactic acid), (2) poly(glycolic acid), (3) copolymers of lactic acid and glycolic acid, and (4) copolymers of lactic acid with a monomer selected from the group consisting of epsilon-caprolactone, beta-propiolactone, alpha,alpha-dimethyl-beta-propiolactone, and dodecanolactone; the substrate comprising at least one surface; (b) a surface layer of a repellant material on at least one surface of the substrate, wherein the surface layer is: (1) capable of preventing aqueous media from wetting the substrate; (2) substantially discontinuous, giving coated and uncoated substrate areas, the coated areas comprising at least 80% of the substrate surface bearing the surface layer; and (3) sufficiently discontinuous to permit biodegradation of the substrate or penetration of water vapor into the substrate; wherein the repellant material has a critical surface tension of 5 to 54 dynes/cm.
Claim 3
Dependent Claim
16 words
The article of claim 1 wherein the repellant surface layer comprises discrete particles of repellant material.
Claim 4
Dependent Claim
14 words
The article of claim 1 wherein the repellant surface layer comprises a porous sheet.
Claim 5
Dependent Claim
18 words
The article of claim 1 wherein the surface layer comprises a material that is both hydrophobic and oleophobic.
Claim 6
Dependent Claim
18 words
The article of claim 1 the repellant material has a critical surface tension of 5 to 30 dynes/cm.
Claim 7
Dependent Claim
18 words
The article of claim 1 the repellant material has a critical surface tension of 5 to 13 dynes/cm.
Claim 8
Dependent Claim
26 words
The article of claim 1, 5 or 6, additionally comprising a cellulosic fiber layer; the article comprising, in order: surface layer, substrate, and cellulosic fiber layer.
Claim 9
Dependent Claim
31 words
The article of claim 7 wherein the substrate consists essentially of a polymer selected from the group consisting f poly(lactic acid), poly(glycolic acid), and copolymers of lactic acid and glycolic acid.
Claim 10
Dependent Claim
12 words
The article of claim 7 wherein the cellulosic fiber layer is paper.
Claim 11
Dependent Claim
39 words
The article of claim 1, 5, or 6, additionally comprising a cellulosic fiber layer, an additional substrate, and an additional surface layer; the article comprising, in order: surface layer, substrate, cellulosic fiber layer, additional substrate, and additional surface layer.
Claim 12
Dependent Claim
31 words
The article of claim 10 wherein the substrate consists essentially of a polymer selected from the group consisting of poly(lactic acid), poly(glycolic acid), and copolymers of lactic acid and glycolic acid.
Claim 13
Dependent Claim
12 words
The article of claim 10 wherein the cellulosic fiber layer is paper.
Claim 14
Dependent Claim
13 words
The article of claim 6 wherein the surface layer comprises a perfluoroalkyl polymer.
Claim 15
Dependent Claim
13 words
The article of claim 6 wherein the surface layer comprises a perfluoroalkylethylacrylate polymer.
Claim 16
Dependent Claim
107 words
The article of claim 6 wherein the surface layer comprises a polymer derived from a mixture of perfluoroalkylethylacrylate monomers of the formula: CF.sub.3 CF.sub.2 (CF.sub.2 CF.sub.2).sub.k C.sub.2 H.sub.4 OC(O)CH═CH.sub.2, the monomer mixture consisting essentially of: (1) 0-10% monomer wherein k is less than 4; (2) 45-75% monomer wherein k is 6; (3) 20-40% monomer wherein k is 8; (4) 1-20% monomer wherein k is 10; and (5) 0-5% monomer wherein k is 12; (b) 10-35% polymer chain units derived from an vinylidene chloride; and (c) 10-25% polymer chain units derived from an alkyl acrylate or an alkyl methacrylate having an alkyl chain length of 2-12 carbon atoms.
Claim 17
Dependent Claim
36 words
The article of claim 1, claim 5, or claim 6 wherein the substrate consists essentially of a polymer selected from the group consisting of poly(lactic acid), poly(glycolic acid), and copolymers of lactic acid and glycolic acid.
Claim 18
Dependent Claim
25 words
The article of any of claim 1, claim 5, or claim 6 wherein coated area comprises 80-95% of the substrate surface bearing the surface layer.
Claim 19
Dependent Claim
20 words
The article of claim 1 wherein the surface layer comprises a woven structure coated with a repellant comprising an organopolysiloxane.
Claim 20
Dependent Claim
12 words
The article of claim 9 wherein the article is a food container.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1997-03-21 | 1997-09-20 | 1998-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-03-21 | 2001-09-20 | 2002-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-03-21 | 2005-09-20 | 2006-03-22 | $7700.00 | Window Closed / Lapsed |