Patent US4639398A successfully refreshed from Google Patents.
US4639398A
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Compound film containing olefin
Assignee: Neste Oyj
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Filing: 1983-02-17
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Granted: 1987-01-27
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Expires: 2003-02-17
Abstract
Abstract Compound film containing polyolefin. Such a compound film comprises at least one polyolefin layer having good adhesiveness to polymers containing polar radicals. In order to make the adhesive polyolefin layer such that the adhesive layer contains no substances detrimental to health, the adhesive layer in the compound film of the invention consists of polyolefin which has been modified by grafting 0.01 to 10% of unsaturated alkoxysilane.
Inventors
- 👤 Christer Bergstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:22
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/30; B32B27/306; B32B27/32; C; C08; C08G; C08G81/00; C08G81/02; C08G81/021; C08J; C08J5/00; C08J5/12; C08J7/00; C08J7/12; C08J7/16; C08J7/18; B32B2309/00; B32B2309/04; B32B2323/00; B32B2323/04; C08J2323/00; C08J2323/02; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12222; Y10T428/31504; Y10T428/31652; Y10T428/31667; Y10T428/31725; Y10T428/31739; Y10T428/31743; Y10T428/31746; Y10T428/3175; Y10T428/31757; Y10T428/31786; Y10T428/31797
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
53 words
A multilayer compound film including at least one layer of polyolefin in contact with a polymer containing polar radicals, said polyolefin layer having between 0.01-10% of an unsaturated alkoxysilane grafted thereon and wherein the alkoxy groups thereof are unhydrolyzed and therefore reactable to adhere the polyolefin to the polymer containing the polar radicals.
Claim 2
Dependent Claim
53 words
A multilayer compound film including at least one layer of polyolefin in contact with a polymer containing polar radicals, said polyolefin layer having between 0.01-10% of an unsaturated alkoxysilane grafted thereon and wherein the alkoxy groups thereof are unhydrolyzed and therefore reactable to adhere the polyolefin to the polymer containing the polar radicals.
Claim 3
Dependent Claim
27 words
The film of claim 1, wherein the silane is selected from the group consisting of vinyl trimethoxysilane, vinyl triethoxysilane, vinyl tris(betamethoxyethoxy)silane, and gamma methacryloxypropyltrimethoxysilane, and mixtures thereof.
Claim 4
Dependent Claim
14 words
The film of claim 1, wherein the polymer is polyamide, polyester, polyethylene, or polypropylene.
Claim 5
Dependent Claim
10 words
The film of claim 2, wherein the polyolefin is polyethylene.
Claim 6
Dependent Claim
12 words
The film of claim 2, wherein the polyolefin is ethyl-vinyl acetate copolymer.
Claim 7
Dependent Claim
68 words
A multilayer compound film including at least one layer of polyolefin in contact with a polymer containing polar radicals, said polyolefin layer being modified by (a) admixing between 0.01-10% of an unsaturated alkoxysilane and 0.01-0.5% of a radical former, under conditions where no grafting of the silane takes place; and (b) then grafting the alkoxysilane onto the polyolefin to modify the same, and forming a multilayer compound film.
Claim 8
Dependent Claim
68 words
A multilayer compound film including at least one layer of polyolefin in contact with a polymer containing polar radicals, said polyolefin layer being modified by (a) admixing between 0.01-10% of an unsaturated alkoxysilane and 0.01-0.5% of a radical former, under conditions where no grafting of the silane takes place; and (b) then grafting the alkoxysilane onto the polyolefin to modify the same, and forming a multilayer compound film.
Claim 9
Dependent Claim
20 words
The film of claim 6, wherein the admixing in step (a) is carried out at a temperature of 115°-170° C.
Claim 10
Dependent Claim
17 words
The film of claim 6, wherein step (b) is carried out in less than about four minutes.
Claim 11
Dependent Claim
14 words
The film of claim 8, wherein step (b) is carried out in 2-3 minutes.
Claim 12
Dependent Claim
12 words
The film of claim 6, wherein the radical former is dicumyl peroxide.
Claim 13
Dependent Claim
23 words
The film of claim 6, additionally comprising the step of maintaining temperature in step (a) below the decomposition temperature of the radical former.
Claim 14
Dependent Claim
31 words
The film of claim 6, wherein, in step (b), the film is formed by combining the silane-modified polyolefin in molten state with a film of the polymer containing the polar radicals.
Claim 15
Dependent Claim
31 words
The film of claim 6, wherein in step (b) both the modified polyolefin and the polymer containing the polar radicals are combined in molten form to form the multi-layer compound film.
Claim 16
Dependent Claim
33 words
The film of claim 6, wherein in step (b) a film of the modified polyolefin is combined with a film of the polymer containing the polar radicals, to form the multilayer compound film.
Claim 17
Independent Claim
73 words
A method of forming a multilayer compound film including at least one layer of polyolefin in contact with a polymer containing polar radicals, said method comprising the steps of (a) admixing between 0.01-10% of an unsaturated alkoxysilane and 0.01-0.5% of a radical former, under conditions where no grafting of the silane takes place, (b) then grafting the thus-admixed alkoxysilane onto the polyolefin layer to be modified, and (c) forming a multilayer compound film.
Claim 18
Independent Claim
73 words
A method of forming a multilayer compound film including at least one layer of polyolefin in contact with a polymer containing polar radicals, said method comprising the steps of (a) admixing between 0.01-10% of an unsaturated alkoxysilane and 0.01-0.5% of a radical former, under conditions where no grafting of the silane takes place, (b) then grafting the thus-admixed alkoxysilane onto the polyolefin layer to be modified, and (c) forming a multilayer compound film.
Claim 19
Dependent Claim
20 words
The method of claim 15, wherein the admixing in step (a) is carried out at a temperature of 115°-170° C.
Claim 20
Dependent Claim
17 words
The method of claim 15, wherein step (b) is carried out in less than about four minutes.
Claim 21
Dependent Claim
14 words
The method of claim 17, wherein step (b) is carried out in 2-3 minutes.
Claim 22
Dependent Claim
23 words
The method of claim 15, additionally comprising the step of maintaining temperature in step (a) below the decomposition temperature of the radical former.
Claim 23
Dependent Claim
14 words
The method of claim 15, wherein the alkoxy groups of the silane remain unhydrolyzed.
References Cited (Backward Citations)
US4395459A
Cited
GB2100188A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-01-26 | 1990-07-28 | 1991-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-26 | 1994-07-28 | 1995-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-26 | 1998-07-28 | 1999-01-27 | $7700.00 | Window Closed / Lapsed |