US4748074A
Expired / Lapsed
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Compositions having non-linear optical properties
Assignee: British Telecommunications PLC
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Filing: 1985-12-16
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Granted: 1988-05-31
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Expires: 2005-12-16
Abstract
Abstract Non linear optical compositions contain a vinylidene fluoride copolymer and an additive having molecular optoelectronic activity, e.g. methyl-N-(2,4-dinitrophenyl)-alaninate. Poled films derived from the composite display optoelectronic activity. There is a marked contrast with known techniques in which single crystals are utilised. The compositions are used to make laminates which display good waveguide properties.
Inventors
- 👤 Philippos Pantelis
- 👤 Graham J. Davies
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:47
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/35; G02F1/355; G02F1/361; G02F1/3611; C; C08; C08K; C08K5/00; C08K5/16; C08K5/32; C08L; C08L27/00; C08L27/02; C08L27/12; C08L27/16; G02F1/01; G02F1/061; G02F1/065; C08L33/00; C08L33/04; C08L33/06; C08L33/10; C08L33/12; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
67 words
A composition for use in optical devices which consists essentially of: (A) 10% to 99.9% of a vinylidene fluoride polymer; (B) 0.1% to 50% of an additive that is an organic compound having non-linear optical properties; and (C) 0% to 60% of a polymeric auxiliary component material for enhancing the compatibility of components (A) and (B); wherein all percentages are by weight based on the total composition.
Claim 2
Dependent Claim
67 words
A composition for use in optical devices which consists essentially of: (A) 10% to 99.9% of a vinylidene fluoride polymer; (B) 0.1% to 50% of an additive that is an organic compound having non-linear optical properties; and (C) 0% to 60% of a polymeric auxiliary component material for enhancing the compatibility of components (A) and (B); wherein all percentages are by weight based on the total composition.
Claim 3
Dependent Claim
15 words
A composition according to claim 1, wherein the amount of additive is 0.5 to 30%.
Claim 4
Dependent Claim
15 words
A composition according to claim 2, wherein the amount of additive is 1 to 20%.
Claim 5
Dependent Claim
18 words
A composition according to any one of claims 1-3, wherein the additive has β>10.sup.-30 esu and/or γ>4×10.sup.-35 esu.
Claim 6
Dependent Claim
59 words
A composition according to any one of claims 1-3, wherein component (A) is homopolymer of CH 2 ═CF 2 or a copolymer of CH 2 ═CF 2 and up to 80 mole %, based on the copolymer, of a different comonomer having the formula C 2 F n H 4-n wherein n is an integer from 1 to 4.
Claim 7
Dependent Claim
27 words
A composition according to claim 5, wherein the copolymer is of 75 mole % to 65 mole % vinylidene fluoride and 25% mole to 35% mole trifluoroethylene.
Claim 8
Dependent Claim
34 words
A composition according to any one of claims 1-3, wherein the auxiliary component is derived from monomeric molecules which contain one vinyl unsaturation and one carbonyl group and have a molecular weight below 150.
Claim 9
Dependent Claim
75 words
A composition according to claim 7, wherein each monomeric molecule has a formula selected from: R"--CO--X--R' (a) R'--CO--X--R" (b) Y--CO--Z--R" (c) wherein R' is selected from --CH 3 or --C 2 H 5 ; R" is selected from --CH═CH 2 or --C(CH 3 )═CH 2 ; X is a bridge selected from a direct bond, --O--, --NH-- or --N(CH 3 )--; and Y and Z are linked together so as to form a pyrrolidone ring.
Claim 10
Dependent Claim
18 words
A composition according to claim 8, wherein the auxiliary component is poly(methylacrylate), poly(methylmethacrylate), poly(vinylacetate), poly(N-vinyl-2 pyrrolidone)or Poly(NN dimethylacrylamide).
Claim 11
Dependent Claim
21 words
A composition according to any one of claims 1-3 wherein the additive is: 2-methyl-4-nitro-aniline 2'-dimethylamino-5'-nitroacetanilide 1-(5-nitro-2-pyridyl)pyrrolidin-2-ylmethanol 5'-nitro-2'-pyrrolidin-1-ylacetanilide 1-(4-nitrophenyl)pyrrolidin-2-ylmethanol methyl-N-(2,4-dinitrophenyl)-alaninate, or 1-phenylethyl(5-nitro-2-pyridyl)amine.
Claim 12
Dependent Claim
31 words
A composition according to any one of claims 1-3 which contains: (A) 80 to 99% of a vinylidene fluoride polymer; and (B) 20 to 1% of an additive having non-linear properties.
Claim 13
Dependent Claim
48 words
A composition according to claim 11 wherein item (A) is a copolymer containing 75 mole % to 65 mole % of vinylidene fluoride and 25% mole to 35% mole of comonomer having the formula C 2 F n H(4-n) wherein n is an integer from 1 to 4.
Claim 14
Dependent Claim
14 words
A composition according to claim 11 wherein item (B) is either: 2-methyl-4-nitroaniline or Methyl-N-(2,4-dinitrophenyl)-alaninate.
Claim 15
Dependent Claim
13 words
Shaped articles composed of a composition according to any one of claims 1-3.
Claim 16
Dependent Claim
19 words
Shaped articles according to claim 14, wherein at least one dimension is in the range 0.1 to 1000 μm.
Claim 17
Dependent Claim
14 words
Shaped articles according to claim 15, wherein the range is 1 to 200 μm.
Claim 18
Dependent Claim
9 words
Shaped articles according to claim 14, which are orientated.
Claim 19
Dependent Claim
9 words
Shaped articles according to claim 14, which are poled.
Claim 20
Independent Claim
36 words
A device for processing optical signals wherein said device includes an optical component formed of a composition according to any one of claims 1 to 3 said composition having been poled to develop the non-linear properties.
Claim 21
Dependent Claim
11 words
A composition according to claim 1 in which B>10 -30 esu.
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) | 1991-05-31 | 1991-11-30 | 1992-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-31 | 1995-11-30 | 1996-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-31 | 1999-11-30 | 2000-05-31 | $7700.00 | Window Closed / Lapsed |