US4098952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coated polyester film assembly with a primer layer
Assignee: Imperial Chemical Industries Ltd
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Filing: 1976-07-22
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Granted: 1978-07-04
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Expires: 1996-07-22
Abstract
Abstract Polyester films are primed with copolymers of acrylic or methacrylic acid esters, glycidyl acrylate or methacrylate, and acrylonitrile, optionally with an acrylic or methacrylic comonomer having a functional hydrophilic group, e.g. hydroxyethyl methacrylate. When the priming polymer contains less than 20 mole % of acrylonitrile as comonomer it is preferably cross-linked with an agent such as a melamine formaldehyde condensate.
Inventors
- 👤 Roger Sidney Arthur Kelly
- 👤 John Robert Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:12
CPC Classifications
C; C09; C09D; C09D133/00; C09D133/04; C09D133/06; C09D133/062; C09D133/068; C08; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J7/043; C09D133/18; C09D133/20; C08J2367/00; C08J2367/02; C08J2461/00; C08J2461/20; C08L; C08L61/00; C08L61/20; C08L63/00; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31786; Y10T428/31797; Y10T428/31855; Y10T428/3188; Y10T428/31884; Y10T428/31891; Y10T428/31909; Y10T428/31928
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
77 words
A coated film assembly, which comprises a support film of a linear polyester and a polymeric priming layer applied to at least one surface of the support film, said priming layer consisting essentially of a copolymer comprising: 3 to 25 mole % of glycidyl methacrylate or glycidyl acrylate, 35 to 95 mole % of one or more other copolymerisable monomers selected from the esters of acrylic and methacrylic acids, and 1 to 60 mole % of acrylonitrile.
Claim 2
Dependent Claim
77 words
A coated film assembly, which comprises a support film of a linear polyester and a polymeric priming layer applied to at least one surface of the support film, said priming layer consisting essentially of a copolymer comprising: 3 to 25 mole % of glycidyl methacrylate or glycidyl acrylate, 35 to 95 mole % of one or more other copolymerisable monomers selected from the esters of acrylic and methacrylic acids, and 1 to 60 mole % of acrylonitrile.
Claim 3
Dependent Claim
29 words
A coated film assembly according to claim 1, in which the copolymer included in the priming layer also comprises up to 3 mole % of acrylic and/or methacrylic acid.
Claim 4
Dependent Claim
27 words
A coated film assembly according to claim 1, in which the monomer selected from the esters of acrylic and methacrylic acids comprises ethyl acrylate and methyl methacrylate.
Claim 5
Dependent Claim
28 words
A coated film assembly according to claim 1, in which the copolymer included in the priming layer comprises 50 to 80% of the acrylic and/or methacrylic acid ester(s).
Claim 6
Dependent Claim
35 words
A coated film assembly according to claim 1, in which the copolymer included in the priming layer also comprises up to 15 mole % of an acrylic or methacrylic monomer having a functional hydrophilic group.
Claim 7
Dependent Claim
23 words
A coated film assembly according to claim 5, in which the acrylic or methacrylic monomer having a functional hydrophilic group comprises hydroxyethyl methacrylate.
Claim 8
Dependent Claim
33 words
A coated film assembly according to claim 5, in which the copolymer included in the priming layer comprises 1 to 5 mole % of the acrylic or methacrylic monomer having the functional group.
Claim 9
Dependent Claim
29 words
A coated film assembly according to claim 1, in which the copolymer included in the priming layer comprises 5 to 10 mole % of glycidyl methacrylate or glycidyl acrylate.
Claim 10
Dependent Claim
35 words
A coated film assembly according to claim 4, in which the copolymer included in the priming layer comprises 30 to 50 mole % of ethyl acrylate and 20 to 50 mole % of methyl methacrylate.
Claim 11
Dependent Claim
25 words
A coated film assembly according to claim 1, in which the copolymer included in the priming layer comprises up to 40 mole % of acrylonitrile.
Claim 12
Dependent Claim
47 words
A coated film assembly according to claim 1, in which the copolymer included in the priming layer comprises 7 mole % glycidyl methacrylate, 1 mole % of hydroxyethyl methacrylate, 35 mole % of ethyl acrylate, 21 mole % of methyl methacrylate and 36 mole % of acrylonitrile.
Claim 13
Dependent Claim
23 words
A coated film assembly according to claim 1, in which the support film comprises a biaxially oriented and heat-set film of polyethylene terephthalate.
Claim 14
Dependent Claim
45 words
A coated film assembly according to claim 1, in which the priming layer is further coated with a layer comprising a lacquer comprising a thermoplastic or thermosetting acrylic, cellulose acetate butyrate, cellulose acetate propionate or a polyvinyl acetate (0 to 80% hydrolysed) or cellulose acetate.
Claim 15
Dependent Claim
68 words
A coated film assembly according to claim 1, in which the proportion of acrylonitrile in the copolymer of the priming layer is less than 20 mole % and the proportions of glycidyl methacrylate or glycidyl acrylate and the acrylic or methacrylic monomer having a functional hydrophilic group are less than 15 mole % and 10 mole % respectively and the copolymer is cross-linked with an added cross-linking agent.
Claim 16
Dependent Claim
45 words
A coated film assembly according to claim 4, in which the copolymer included in the priming layer comprises from 30 to 50 mole % of the esters of acrylic acid and from 40 to 60 mole % of the esters of methacrylic acid plus acrylonitrile.
Claim 17
Dependent Claim
37 words
A coated film assembly according to claim 4, in which the copolymer included in the priming layer comprises a total molar proportion of acrylonitrile and the acrylic and/or methacrylic acid esters in the range 80 to 95%.
Claim 18
Dependent Claim
77 words
A process for the production of a coated film assembly, which comprises applying a polymeric priming layer to at least one surface of a support film of a linear polyester, said priming layer comprising a copolymer comprising: 3 to 25 mole % of glycidyl methacrylate or glycidyl acrylate, 35 to 95 mole % of one or more other copolymerisable monomers selected from the esters of acrylic and methacrylic acids, and 1 to 60 mole % of acrylonitrile.
Claim 19
Dependent Claim
77 words
A process for the production of a coated film assembly, which comprises applying a polymeric priming layer to at least one surface of a support film of a linear polyester, said priming layer comprising a copolymer comprising: 3 to 25 mole % of glycidyl methacrylate or glycidyl acrylate, 35 to 95 mole % of one or more other copolymerisable monomers selected from the esters of acrylic and methacrylic acids, and 1 to 60 mole % of acrylonitrile.
Claim 20
Dependent Claim
42 words
A process for the production of a coated film assembly, which comprises applying a polymeric priming layer to at least one surface of a support film of a linear polyester, wherein the priming layer comprises a copolymer as specified in claim 1.
Claim 21
Dependent Claim
36 words
A process according to claim 17, in which the priming layer is applied to the surface of the support film between the two stretching operations which are applied in mutually perpendicular directions to orient the film.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-07-03 | 1982-01-02 | 1982-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-03 | 1986-01-02 | 1986-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-03 | 1990-01-02 | 1990-07-04 | $7700.00 | Window Closed / Lapsed |