US4149920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for moulding unsaturated polyester articles
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1976-09-23
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Granted: 1979-04-17
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Expires: 1996-09-23
Abstract
Abstract A process for the production of moulded articles, such as sheet laminates, which comprises applying and curing a layer of a curable unsaturated polyester resin to a forming layer of film composite, e.g., a polyethylene terephthalate film layer, and a polymeric adhesive layer, consisting essentially of an isophthalate/terephthalate copolyester.
Inventors
- 👤 Cyril J. Ealding
- 👤 Keith E. Brealey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:06
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/36; B05; B05D; B05D7/00; B05D7/02; B32B27/06; B32B27/08; B32B7/00; B32B7/04; B32B7/12; B32B2307/00; B32B2307/50; B32B2307/514; B32B2307/518; B32B2367/00; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31786; Y10T428/31797; Y10T428/31855; Y10T428/31909; Y10T428/31928
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
96 words
A process for the production of a moulded article comprising a layer of a cured unsaturated polyester resin faced on at least one surface with a layer of a synthetic linear polyester material, which process comprises applying a layer of a curable unsaturated polyester resin to the copolyester adhesive layer of a film composite comprising a layer of a synthetic linear polyester film and consisting of a biaxially oriented and heat-set film of polyethylene terephthalate a layer consisting essentially of an adhesive copolyester of ethylene terephthalate and ethylene isophthalate, and curing the curable unsaturated polyester resin.
Claim 2
Dependent Claim
96 words
A process for the production of a moulded article comprising a layer of a cured unsaturated polyester resin faced on at least one surface with a layer of a synthetic linear polyester material, which process comprises applying a layer of a curable unsaturated polyester resin to the copolyester adhesive layer of a film composite comprising a layer of a synthetic linear polyester film and consisting of a biaxially oriented and heat-set film of polyethylene terephthalate a layer consisting essentially of an adhesive copolyester of ethylene terephthalate and ethylene isophthalate, and curing the curable unsaturated polyester resin.
Claim 3
Dependent Claim
30 words
A process according to claim 1, in which the copolyester comprises from 65 to 95 mole % of ethylene terephthalate and from 35 to 5 mole % of ethylene isophthalate.
Claim 4
Dependent Claim
25 words
A process according to claim 2, in which the copolyester comprises a copolyester of 80 mole % ethylene terephthalate and 20 mole % ethylene isophthalate.
Claim 5
Dependent Claim
36 words
A process according to claim 1, in which the film composite is produced by coextruding a copolyester adhesive layer with a polyethylene terephthalate layer and is stretched to orient the polyethylene terephthalate layer and heat set.
Claim 6
Dependent Claim
21 words
A process according to claim 1, in which the unsaturated polyester resin layer contains finely divided particulate fillers and/or fibrous reinforcement.
Claim 7
Dependent Claim
49 words
A process according to claim 1, wherein a moulded article in the form of a sheet laminate is produced by applying a film composite comprising a biaxially oriented and heat-set layer of polyethylene terephthalate and a copolyester adhesive layer to a continuously moving layer of curable unsaturated polyester resin.
Claim 8
Dependent Claim
37 words
A process according to claim 6, in which the layer of curable unsaturated polyester resin is continuously cast upon a moving web of film and the film composite applied to the cast layer of unsaturated polyester resin.
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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) | 1982-04-16 | 1982-10-16 | 1983-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-16 | 1986-10-16 | 1987-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-16 | 1990-10-16 | 1991-04-17 | $7700.00 | Window Closed / Lapsed |