US4250227A
Expired / Lapsed
US
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Micron size polymeric coating and related methods
Assignee: Compagnie Francaise de Raffinage SA
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Filing: 1978-03-27
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Granted: 1981-02-10
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Expires: 1998-03-27
Abstract
Abstract Process for, and composites made by, coating a polymer layer onto a support, obtained by quenching a solution of the polymer to form a polymer suspension, by spreading the suspension on the support, and thereafter eliminating the solvent. The resulting coating of polymer preferably may thereafter be fused. Application of said process to the production also composites comprising an aluminum film and a film thermally bonded to said support by a thin intermediate layer of a copolymer formed of acrylic acid grafted with polyethylene or polypropylene, said layer having been applied by the foregoing process.
Inventors
- 👤 Bruno Claude
- 👤 Richard Le Fustec
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:48
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/09; B; B32; B32B; B32B15/00; B32B15/04; B32B15/08; B05; B05D; B05D3/00; B05D3/002; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31692; Y10T428/31855; Y10T428/31909; Y10T428/31913
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
113 words
In a process for coating a support with a polymer layer comprising: (a) preparation of a suspension comprising polymer particles in an organic liquid, (b) coating of the support with said polymer suspension, and (c) the elimination of the organic liquid by heating to a sufficient temperature to drive off the organic liquid; the improvement in said process to form a layer in the neighborhood of about 1 micron comprising preparing the polymer suspension by quenching to effect a rapid cooling of a solution of said polymer at a concentration and to a temperature effective to precipitate the polymer to form a suspension having an average particle size of less than 8 microns.
Claim 2
Dependent Claim
113 words
In a process for coating a support with a polymer layer comprising: (a) preparation of a suspension comprising polymer particles in an organic liquid, (b) coating of the support with said polymer suspension, and (c) the elimination of the organic liquid by heating to a sufficient temperature to drive off the organic liquid; the improvement in said process to form a layer in the neighborhood of about 1 micron comprising preparing the polymer suspension by quenching to effect a rapid cooling of a solution of said polymer at a concentration and to a temperature effective to precipitate the polymer to form a suspension having an average particle size of less than 8 microns.
Claim 3
Dependent Claim
36 words
Process in accordance with claim 1, which comprises after said elimination step the further step of heating to a sufficient temperature to fuse the polymer to obtain a continuous layer of said polymer on the support.
Claim 4
Dependent Claim
14 words
Process in accordance with claim 1, wherein said polymer is a homopolymer of ethylene.
Claim 5
Dependent Claim
14 words
Process in accordance with claim 2, wherein said polymer is a homopolymer of ethylene.
Claim 6
Dependent Claim
21 words
Process in accordance with claim 1, wherein said polymer is a graft copolymer of an unsaturated monoethylenic carboxylic acid on polyethylene.
Claim 7
Dependent Claim
21 words
Process in accordance with claim 2, wherein said polymer is a graft copolymer of an unsaturated monoethylenic carboxylic acid on polyethylene.
Claim 8
Dependent Claim
15 words
Process in accordance with claim 5, wherein said unsaturated monoethylenic carboxylic acid is acrylic acid.
Claim 9
Dependent Claim
15 words
Process in accordance with claim 6, wherein said unsaturated monoethylenic carboxylic acid is acrylic acid.
Claim 10
Dependent Claim
27 words
Process in accordance with claim 3, 4, 5, 6, 7 or 8, wherein the concentration of the polymer in the suspension is less than 8 wt. %.
Claim 11
Dependent Claim
27 words
Process in accordance with claim 3, 4, 5, 6, 7 or 8, wherein the concentration of the polymer in the suspension is less than 5 wt. %.
Claim 12
Dependent Claim
26 words
Process in accordance with claim 9, wherein the particle size of the polymer, measured in the dry state, contained in the suspension is under 8 microns.
Claim 13
Dependent Claim
25 words
Process in accordance with claim 11, wherein the polymer suspension is obtained by quenching the polymer solution to a temperature of 50° C. or less.
Claim 14
Dependent Claim
21 words
Process in accordance with claim 1, wherein said polymer is a graft copolymer of an unsaturated monoethylenic carboxylic acid on polypropylene.
Claim 15
Dependent Claim
21 words
Process in accordance with claim 2, wherein said polymer is a graft copolymer of an unsaturated monoethylenic carboxylic acid on polypropylene.
Claim 16
Dependent Claim
15 words
Process in accordance with claim 13, wherein the unsaturated monoethylenic carboxylic acid is acrylic acid.
Claim 17
Dependent Claim
15 words
Process in accordance with claim 14, wherein the unsaturated monoethylenic carboxylic acid is acrylic acid.
Claim 18
Dependent Claim
21 words
Process in accordance with claim 15, wherein the concentration of the polymer in the suspension is less than 5 wt. %.
Claim 19
Dependent Claim
23 words
Process in accordance with claim 11, wherein the support is selected from the group consisting of the metals, paper, glass, polymers and fabrics.
Claim 20
Dependent Claim
22 words
Process in accordance with claim 18, wherein the support is selected from the group consisting of films of aluminum, polyethylene or polypropylene.
Claim 21
Dependent Claim
19 words
A support coated with a layer of polymer obtained by the process in accordance with claims 1 or 2.
Claim 22
Dependent Claim
21 words
Process in accordance with claim 16, wherein the concentration of the polymer in the suspension is less than 5 wt. %.
Claim 23
Dependent Claim
31 words
Process in accordance with claim 13, 14, 15, 16, 17 or 21, wherein the polymer suspension is obtained by quenching a polymer solution to a temperature of 40° C. or less.
Claim 24
Dependent Claim
23 words
Process in accordance with claim 22, wherein the support is selected from the group consisting of the metals, paper, glass, polymers and fabrics.
Claim 25
Dependent Claim
22 words
Process in accordance with claim 23, wherein the support is selected from the group consisting of films of aluminum, polyethylene or polypropylene.
Claim 26
Dependent Claim
24 words
Process in accordance with claim 1, wherein said solution of polymer is prepared prior to quenching by dissolving melted polymer in said organic liquid.
Claim 27
Dependent Claim
24 words
Process in accordance with claim 2, wherein said solution of polymer is prepared prior to quenching by dissolving melted polymer in said organic liquid.
Claim 28
Independent Claim
167 words
A method of making a composite film formed of a polyethylene or polypropylene film and of an aluminum film comprising: I. coating a support film of aluminum, polyethylene, or polypropylene with a graft copolymer layer by the steps comprising: (a) preparing a suspension comprising particles of a graft copolymer, obtained by polymerization of ethylene or propylene and grafting with acrylic acid, by quenching to effect a rapid cooling of a solution of said copolymer in an organic liquid at a concentration and to a temperature effective to precipitate the copolymer as a suspension having an average particle size of less than 8 microns, (b) coating the support film with said copolymer suspension, and (c) eliminating the organic liquid from the resulting coating by heating to a sufficient temperature to drive off the organic liquid and give a layer having a thickness in the neighborhood of about 1 micron; and II. bonding the resulting coated support film to a second film of aluminum, polyethylene or polypropylene with heat.
Claim 29
Independent Claim
167 words
A method of making a composite film formed of a polyethylene or polypropylene film and of an aluminum film comprising: I. coating a support film of aluminum, polyethylene, or polypropylene with a graft copolymer layer by the steps comprising: (a) preparing a suspension comprising particles of a graft copolymer, obtained by polymerization of ethylene or propylene and grafting with acrylic acid, by quenching to effect a rapid cooling of a solution of said copolymer in an organic liquid at a concentration and to a temperature effective to precipitate the copolymer as a suspension having an average particle size of less than 8 microns, (b) coating the support film with said copolymer suspension, and (c) eliminating the organic liquid from the resulting coating by heating to a sufficient temperature to drive off the organic liquid and give a layer having a thickness in the neighborhood of about 1 micron; and II. bonding the resulting coated support film to a second film of aluminum, polyethylene or polypropylene with heat.
Claim 30
Dependent Claim
19 words
The method according to claim 27, wherein during the bonding step the graft copolymer is heated sufficiently to fuse.
Claim 31
Dependent Claim
20 words
The method in accordance with claim 28, wherein the acrylic acid content of the graft copolymer is 0.5 wt. %.
Claim 32
Dependent Claim
15 words
A film composite made by a method in accordance with claims 29, 27, or 28.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-02-10 | 1984-08-11 | 1985-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-10 | 1988-08-11 | 1989-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-10 | 1992-08-11 | 1993-02-10 | $7700.00 | Window Closed / Lapsed |