US5473047A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Soluble precursor to poly (cyanoterephthalydene) and method of preparation
Assignee: Universal Display Corp
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Filing: 1994-10-11
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Granted: 1995-12-05
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Expires: 2014-10-11
Abstract
Abstract A method of preparing a lass of PPV derivatives includes preparing a soluble precursor of a PPV derivative and converting the soluble precursor to a PPV derivative. The converting includes performing either a thermal treatment in a range of temperatures from approximately 25° C. to 400° C. at a reduced pressure or an acid-catalyzed ultraviolet radiation treatment.
Inventors
- 👤 Song Q. Shi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:59
CPC Classifications
C; C08; C08G; C08G61/00; C08G61/02; C09; C09K; C09K11/00; C09K11/06; H; H10; H10K; H10K50/00; H10K50/10; H10K50/11; H10K85/00; H10K85/10; H10K85/111; H10K85/114
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
151 words
A method of preparing a class of poly(phenylene vinylene) derivatives comprising the steps of: preparing a soluble precursor of a poly(phenylene vinylene) derivative with the following reaction ##STR7## where: P is hydrogen or an electron withdrawing group selected from the group consisting cyano, nitro, or fluoride. RX is an organic trapping reagent; R 1 to R 8 represent substitutional possibilities at each position and each represents hydrogen or hydrocarbon groups or functional groups selected from the group consisting of cyano, nitro, halogen, haloalkyl, haloalkoxy, alkoxyl, amido, amino, sulfonyl, carbonyl, carbonyloxy and oxycarbonyl, with the provision that R 1 and R 2 together, R 3 and R 4 together, R 5 and R 6 together, R 7 and R 8 together can form a fused benzo ring; and n is the average number of repeating units in a single polymer molecule; and converting the soluble precursor to a poly (phenylene vinylene) derivative.
Claim 2
Independent Claim
151 words
A method of preparing a class of poly(phenylene vinylene) derivatives comprising the steps of: preparing a soluble precursor of a poly(phenylene vinylene) derivative with the following reaction ##STR7## where: P is hydrogen or an electron withdrawing group selected from the group consisting cyano, nitro, or fluoride. RX is an organic trapping reagent; R 1 to R 8 represent substitutional possibilities at each position and each represents hydrogen or hydrocarbon groups or functional groups selected from the group consisting of cyano, nitro, halogen, haloalkyl, haloalkoxy, alkoxyl, amido, amino, sulfonyl, carbonyl, carbonyloxy and oxycarbonyl, with the provision that R 1 and R 2 together, R 3 and R 4 together, R 5 and R 6 together, R 7 and R 8 together can form a fused benzo ring; and n is the average number of repeating units in a single polymer molecule; and converting the soluble precursor to a poly (phenylene vinylene) derivative.
Claim 3
Dependent Claim
29 words
A method of preparing a class of poly(phenylene vinylene) derivatives as claimed in claim 1 wherein the base is comprised of one of an organic, inorganic or organometallic base.
Claim 4
Dependent Claim
43 words
A method of preparing a class of poly(phenylene vinylene) derivatives as claimed in claim 1 wherein the base is comprised of NaOH, (CH 3 ) 3 COK, CH 3 SO 2 CH 2 Li, NaNH 2 , NaH, PhLi, or CH 3 Li.
Claim 5
Dependent Claim
39 words
A method of preparing a class of poly(phenylene vinylene) derivatives as claimed in claim 1 wherein the organic trapping reagent is comprised of one of carboxylic add anhydride, carboxylic acid chloride, alkyl sulfonyl chloride, carboxylic ester, or xanthate ester.
Claim 6
Dependent Claim
37 words
A method of preparing a class of poly(phenylene vinylene) derivatives as claimed in claim 1 wherein the organic trapping reagent is comprised Of one of acetic anhydride, trifluoroacetic anhydride, acetic chloride, methanesulfonyl chloride, or carbon disulfide/methyl iodide.
Claim 7
Dependent Claim
25 words
A method of preparing a class of poly(phenylene vinylene) derivatives as claimed in claim 1 wherein the preferred initial polymerization temperature is below 0° C.
Claim 8
Dependent Claim
33 words
A method of preparing a class of poly(phenylene vinylene) derivatives as claimed in claim 1 wherein the step of converting further comprises performing either a thermal treatment or an acid-catalyzed ultraviolet radiation treatment.
Claim 9
Dependent Claim
35 words
A method of preparing a class of poly(phenylene vinylene) derivatives as claimed in claim 7 wherein the step of performing either a thermal treatment or an acid-catalyzed ultraviolet radiation treatment comprises the following reaction: ##STR8##
Claim 10
Dependent Claim
38 words
A method of preparing a class of poly(phenylene vinylene) derivatives as claimed in claim 7 wherein the step of converting by a thermal treatment comprises heating at a temperature in the range of 25° C. to 400° C.
Claim 11
Dependent Claim
39 words
A method of preparing a class of poly(phenylene vinylene) derivatives as claimed in claim 7 wherein the step of converting by a thermal treatment comprises heating at a temperature in the preferred range of 120° C. to 300° C.
Claim 12
Dependent Claim
30 words
A method of preparing a class of poly(phenylene vinylene) derivatives as claimed in claim 1 wherein the step of preparing comprises the preparation of a soluble precursor polymer of poly(cyanoterephthalydene).
Claim 13
Dependent Claim
37 words
A method of preparing a class of poly(phenylene vinylene) derivatives as claimed in claim 11 wherein the preparation of a soluble precursor polymer of poly(cyanoterephthalydene) comprises the following reaction: ##STR9## where: RX is an organic trapping reagent.
Claim 14
Dependent Claim
46 words
A method of preparing a class of poly(phenylene vinylene) derivatives as claimed in claim 11 wherein the preparation of a soluble precursor polymer of poly(cyanoterephthalydene) includes using an organic trapping reagent comprising one of acetic anhydride, trifluoroacetic anhydride, acetic chloride, methanesulfonyl chloride, or carbon disulfide/methyl iodide.
Claim 15
Dependent Claim
33 words
A method of preparing a class of poly(phenylene vinylene) derivatives as claimed in claim 11 wherein the preparation of a soluble precursor polymer of poly(cyanoterephthalydene) further comprises using a base of potassium t-butoxide.
Claim 16
Dependent Claim
50 words
A method of preparing a class of poly(phenylene vinylene) derivatives as claimed in claim 1 wherein the step of preparing a soluble precursor of a poly(phenylene vinylene) derivative comprises the preparation of poly(cyanoterephthalydene) from a soluble precursor polymer by performing either a thermal treatment or an acid-catalyzed ultraviolet radiation treatment.
Claim 17
Dependent Claim
43 words
A method of preparing a class of poly(phenylene vinylene) derivatives as claimed in claim 15 wherein the step of preparing poly(cyanoterephthalydene) from a soluble precursor polymer by performing either a thermal treatment or an acid-catalyzed ultraviolet radiation treatment comprises the following reaction: ##STR10##
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) | 1998-12-04 | 1999-06-05 | 1999-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-12-04 | 2003-06-05 | 2003-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-12-04 | 2007-06-05 | 2007-12-05 | $7700.00 | Window Closed / Lapsed |