Patent EP0595413A1 successfully refreshed from Google Patents.
EP0595413A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Plastic sheet, a process for the manufacture thereof and formed articles containing the sheet
Assignee: Covestro NV
•
Filing: 1993-10-21
•
Granted: —
•
Expires: 2013-10-21
Abstract
Abstract Plastic sheet containing a copolymer, which copolymer is obtainable by reacting a dimethyl terephthalate or terephthalic acid with a mixture of 99-55 mole % ethylene glycol and 1-45 mole % cyclohexane dimethanol, a 2 to 100-µ thick layer being present at at least one surface of the sheet, which layer also contains the copolymer and a UV light-absorbing additive.
Inventors
- 👤 Gertjan Venema
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 15:32
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/18; B32B27/06; B32B27/08; B32B27/20; B32B27/36; C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C08G63/199; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3467; C08K5/3472; C08K5/3475; B32B2307/00; B32B2307/10; B32B2307/102; B32B2307/70; B32B2307/712; B32B2419/00; B32B2571/00; B32B2571/02; B32B2590/00; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1089; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/26; Y10T428/263; Y10T428/31504; Y10T428/31786
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
65 words
Plastic sheet containing a copolymer, which copolymer is obtainable by reacting dimethyl terephthalate or terephthalic acid with a mixture of 99-55 mole % ethylene glycol and 1-45 mole % 1,4-cyclohexane dimethanol, characterized in that at at least one surface of the sheet a layer with a thickness of 2 to 100 µ is present, which layer also contains the copolymer and a UV light-absorbing additive.
Claim 2
Dependent Claim
35 words
Plastic sheet according to claim 1, characterized in that the copolymer is obtainable by reacting dimethyl terephthalate or terephthalic acid with a mixture of 98-60 mole % ethylene glycol and 2-40 mole % 1,4-cyclohexane dimethanol.
Claim 3
Dependent Claim
35 words
Plastic sheet according to claim 1, characterized in that the copolymer is obtainable by reacting dimethyl terephthalate or terephthalic acid with a mixture of 97-66 mole % ethylene glycol and 3-34 mole % 1,4-cyclohexane dimethanol.
Claim 4
Dependent Claim
35 words
Plastic sheet according to claim 1, characterized in that the copolymer is obtainable by reacting dimethyl terephthalate or terephthalic acid with a mixture of 95-70 mole % ethylene glycol and 5-30 mole % 1,4-cyclohexane dimethanol.
Claim 5
Dependent Claim
23 words
Plastic sheet according to any one of claims 1-4, characterized in that a benzotriazole or a benzophenon is used as UV light-absorbing additive.
Claim 6
Dependent Claim
18 words
Plastic sheet according to claim 5, characterized in that the benzotriazole contains two benzotriazole groups in each molecule.
Claim 7
Dependent Claim
27 words
Plastic sheet according to any one of claims 1-6, characterized in that the layer containing the copolymer and the UV light-absorbing additive is present at both surfaces.
Claim 8
Dependent Claim
31 words
Plastic sheet according to any one of claims 1-7, characterized in that the layer containing the copolymer and the UV light-absorbing additive contains 1-15% by wt. of the UV light-absorbing additive.
Claim 9
Dependent Claim
35 words
Process for the production of a sheet according to any one of claims 1-8, characterized in that the layer containing the copolymer and the UV light-absorbing additive is applied by means of a coextrusion process.
Claim 10
Dependent Claim
16 words
Shaped articles wholly or partially produced from the sheet according to any one of claims 1-9.
References Cited (Backward Citations)
US4041206A
Cited
JPS5845951A
Cited
US4983653A
Cited
US4859726A
Cited
EP0368637A1
Cited
EP0411136A1
Cited
US4983711A
Cited
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.