US5077135A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Siloxane polymers and copolymers as barrier coatings and method of producing barrier coating properties therewith
Assignee: EG Technology Partners LP
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Filing: 1989-04-12
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Granted: 1991-12-31
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Expires: 2009-04-12
Abstract
Abstract A method of imubing polymer films as of polyethylene and polypropylene with gas, aroma, fragrance, flavor, grease and oil impermeable surface characteristics involving coating the film with appropriate silane compounds and cross-linking the same while providing physical adsorption adherence to the film, and in sufficient coating micron thickness to produce gas and related barrier characteristics; with chemical grafting, including by eb techniques, further providing improved bonding. Preferred barrier-coated polymer films with reduced haze and clarity are formed by such method. The method is also useful to increase the barrier properties of organo-polymer films that already possess initial barrier characteristics.
Inventors
- 👤 John E. Wyman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:57
CPC Classifications
C; C09; C09D; C09D4/00; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J7/043; C08J7/048; C08J2323/00; C08J2323/02; C08J2483/00; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/269; Y10T428/31504; Y10T428/31652; Y10T428/31663; Y10T428/31667
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
98 words
A method of rendering organic polymer films substantially impermeable to gases such as oxygen, aroma, flavor and fragrance, and greases and oils, that comprises, hydrolyzing silane monomers or mixtures of silane monomers in an aqueous alcohol solution and equilibrating the same; coating the same upon the polymer film; and evaporating the alcohol and water to complete the formation of Si--O--Si bonds and to cross-link the silane(s), thereby to produce a siloxane gas-impermeable barrier coating adhered to the surface of the film; and in which the further step is performed of chemically grafting said siloxane coating to the film.
Claim 2
Independent Claim
98 words
A method of rendering organic polymer films substantially impermeable to gases such as oxygen, aroma, flavor and fragrance, and greases and oils, that comprises, hydrolyzing silane monomers or mixtures of silane monomers in an aqueous alcohol solution and equilibrating the same; coating the same upon the polymer film; and evaporating the alcohol and water to complete the formation of Si--O--Si bonds and to cross-link the silane(s), thereby to produce a siloxane gas-impermeable barrier coating adhered to the surface of the film; and in which the further step is performed of chemically grafting said siloxane coating to the film.
Claim 3
Dependent Claim
18 words
A method as claimed in claim 1 and in which the grafting is effected with electron beam radiation.
Claim 4
Dependent Claim
47 words
A method as claimed in claim 1 or 2 and in which the alcohol is methanol and the silane(s) are represented by the following formula: ##STR2## where the groups R1, R2, R3 and R4 may be the same or different and are selected from the following groups:
Claim 5
Dependent Claim
34 words
Alkoxide groups, such as methoxy, ethoxy, propoxy, 2-methoxyethoxy, etc.; 2. Acid groups, such as acetoxy, propoxy, etc.; 3. Alkyl groups, such as methyl, ethyl, propyl, butyl, amyl, benzyl, cyclohexyl, and higher alkyl groups; 4.
Claim 6
Dependent Claim
34 words
Alkoxide groups, such as methoxy, ethoxy, propoxy, 2-methoxyethoxy, etc.; 2. Acid groups, such as acetoxy, propoxy, etc.; 3. Alkyl groups, such as methyl, ethyl, propyl, butyl, amyl, benzyl, cyclohexyl, and higher alkyl groups; 4.
Claim 7
Dependent Claim
58 words
Aromatic groups, such as phenyl and alkylated phenyl groups, naphthyl, etc.; 5. Halogenated alkyl and aromatic groups, such as chloropropyl, 1,1,1-trifluoromethyl, trifluoropropyl, pentafluorophenyl, 3-(heptafluoroisopropoxy), 1H,1H,2H,2H, perfluorodecyl, etc.; 6. Amine containing groups, such as 3-(2-aminoethylamino)propyl, gamma-aminopropyl, etc.; 7. Unsaturated groups such as allyl, gamma(methacryloxy) propyl, vinyl, gamma(acryloxy)propyl, 3-(2-vinylbenzylaminoethyl) propyl, etc.; 8. Epoxy containing groups such as 3-(2,3-epoxypropyloxy) propyl; and
Claim 8
Dependent Claim
58 words
Aromatic groups, such as phenyl and alkylated phenyl groups, naphthyl, etc.; 5. Halogenated alkyl and aromatic groups, such as chloropropyl, 1,1,1-trifluoromethyl, trifluoropropyl, pentafluorophenyl, 3-(heptafluoroisopropoxy), 1H,1H,2H,2H, perfluorodecyl, etc.; 6. Amine containing groups, such as 3-(2-aminoethylamino)propyl, gamma-aminopropyl, etc.; 7. Unsaturated groups such as allyl, gamma(methacryloxy) propyl, vinyl, gamma(acryloxy)propyl, 3-(2-vinylbenzylaminoethyl) propyl, etc.; 8. Epoxy containing groups such as 3-(2,3-epoxypropyloxy) propyl; and
Claim 9
Dependent Claim
25 words
Mercapto containing groups such as 3-mercaptopropyl. 4. A method as claimed in claim 1 and in which the silane comprises a vinyl benzyl amine silane.
Claim 10
Dependent Claim
21 words
A method as claimed in claim 4 and in which the vinyl benzyl amine silane is cohydrolyzed with methyl trimethoxy silane.
Claim 11
Dependent Claim
23 words
A method as claimed in claim 5 and in which the ratios of said silanes by volume range from about 9 to 1.
Claim 12
Dependent Claim
16 words
A method as claimed in claim 1 and in which the silane comprises gamma aminopropyl triethoxysilane.
Claim 13
Dependent Claim
25 words
A method as claimed in claim 1 and in which the siloxane coating is applied in a thickness of the order of a few microns.
Claim 14
Dependent Claim
24 words
A method as claimed in claim 8 and in which the said thickness lies within the range of from about 5 to 22 microns.
Claim 15
Dependent Claim
17 words
A method as claimed in claim 1 and in which the grafting is effected by peroxide cure.
Claim 16
Dependent Claim
56 words
A polymer film constituted of an organic polymer film base to a surface of which is physically adsorbed a cross-linked siloxane non-electrically conductive coating that imbues the said surface with gas, aroma, flavor and fragrance and grease and oil impermeable surface characteristics, and in which the said coating is produced by the method of claim 1.
Claim 17
Dependent Claim
26 words
A polymer film as claimed in claim 11 and in which the said coating is of thickness in the range of about 5 to 22 microns.
Claim 18
Dependent Claim
19 words
A polymer film as claimed in claim 11 and in which the said coating imparts haze-reduction characteristics and clarity.
Claim 19
Dependent Claim
23 words
A polymer film as claimed in claim 11 and in which the silane precursor of the siloxane comprises a vinyl benzyl amine silane.
Claim 20
Dependent Claim
22 words
A polymer film as claimed in claim 14 and in which the vinyl benzyl amine silane is cohydrolyzed with methyl trimethoxy silane.
Claim 21
Dependent Claim
24 words
A polymer film as claimed in claim 15 and in which the ratios of said silanes by volume range from about 9 to 1.
Claim 22
Dependent Claim
21 words
A polymer film as claimed in claim 11 and in which the silane precursor of the siloxane comprises gamma aminopropyltriethoxy silane.
References Cited (Backward Citations)
US4532185A
Cited
US4803126A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-12-30 | 1995-07-01 | 1995-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-12-30 | 1999-07-01 | 1999-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-12-30 | 2003-07-01 | 2003-12-31 | $7700.00 | Window Closed / Lapsed |