US3723172A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical and thermal stabilities and fire resistance of synthetic resinous bodies
Assignee: Dynamit Nobel AG
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Filing: 1970-09-18
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Granted: 1973-03-27
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Expires: 1990-09-18
Abstract
Abstract Synthetic resinous bodies especially in sheet form, such as plates, foils, webs and non-wovens, have their chemical and thermal stabilities and their fire resistance improved by application thereto of a polyester of an aromatic dicarboxylic acid, such as terephthalic acid optionally admixed with isophthalic acid, and a halogenated dihydric phenol which may be mixed with up to an equal mole percent of a halogen-free dihydric phenol. The synthetic resinous material may be a crude pre-form wrapped in a sheet of the polyester and formed into final shape with heat and pressure and, optionally, curing. An epoxy resin or polyurethane adhesive may help bond the synthetic resinous material to the polyester sheet. The synthetic resinous body may comprise a polyamide, polycarbonate, polyvinylchloride, polystyrene or polyester.
Inventors
- 👤 R Ismail
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:53
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/02; B29; B29C; B29C63/00; B29C63/48; C; C08; C08G; C08G63/00; C08G63/68; C08G63/682; C08G63/6824; C08G63/6826; C08J; C08J5/00; C08J5/12; C08J7/00; C08J7/04; C08J7/0427; C08J7/043; C08J7/05; C09; C09D; C09D167/00; C09D167/02; C09D5/00; C09D5/18; C08J2367/00; C08J2467/00; Y; Y10; Y10S; Y10S428/00; Y10S428/92; Y10S428/921; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31507; Y10T428/31725; Y10T428/31736; Y10T428/31786; Y10T428/31797
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
41 words
The process according to claim 1, wherein said polyester is of a dicarboxylic acid and a mixture of a halogenated dihydric phenol and a halogen-free dihydric phenol, said halogenated dihydric phenol comprising at least about 50 mole % of said mixture.
Claim 2
Dependent Claim
32 words
The process according to claim 1, wherein coating of said body of synthetic resinous material is effected with a solution of said polyester in a volatile solvent, the solvent thereafter being evaporated.
Claim 3
Dependent Claim
42 words
The process according to claim 1, wherein said body of synthetic resinous material is a crude pre-form and is coated by application thereabout of a sheet of said polyester, said enveloped body thereafter being formed into final shape with heat and pressure.
Claim 4
Dependent Claim
31 words
The process according to claim 4, including providing an epoxy resin adhesive or a polyurethane adhesive between said body of synthetic resinous material and said polyester sheet to improve adhesion therebetween.
Claim 5
Dependent Claim
15 words
The process according to claim 1, wherein said dicarboxylic acid is an aromatic dicarboxylic acid.
Claim 6
Dependent Claim
26 words
The process according to claim 6, wherein said aromatic dicarboxylic acid is a phthalic acid of which at least about 75 mole percent is terephthalic acid.
Claim 7
Dependent Claim
68 words
The process according to claim 7, wherein said polyester is of a dicarboxylic acid and a mixture of a halogenated dihydric phenol and a halogen-free dihydric phenol, said halogenated dihydric phenol comprising at least about 70 mole percent of said mixture, said body of synthetic resinous material being a crude pre-form, said enveloped body thereafter being formed into final shape with heat and pressure and then being cured.
Claim 8
Dependent Claim
25 words
A coated shaped body of synthetic resinous material of improved chemical and thermal stabilities and improved fire resistance produced by the process of claim 1.
Claim 9
Dependent Claim
37 words
A coated shaped body of synthetic resinous material of improved chemical and thermal stabilities and improved fire resistance produced by the process of claim 8, said synthetic resinous material comprising a polyamide, polycarbonate, polyvinylchloride, polystyrene or polyester.
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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) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |