US4115115A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crystallization of selenium in polymer matrices via in situ generation of organic crystalline nucleation sites
Assignee: Xerox Corp
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Filing: 1977-09-23
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Granted: 1978-09-19
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Expires: 1997-09-23
Abstract
Abstract Disclosed is a method of forming a layer of particulate trigonal selenium dispersed in a polymeric matrix. The method involves: (a) forming a solution containing: I. dibenzoyl peroxide, Ii. an organo selenium compound which interacts with dibenzoyl peroxide to form zero valent selenium, and Iii. a matrix polymer which is substantially non-reactive with dibenzoyl peroxide and the organo selenium compound, in a volatile solvent; (b) applying the solution to a substrate in the form of a thin film; (c) allowing the dibenzoyl peroxide and organo selenium compound to react thereby forming amorphous zero valent selenium particles dispersed in the matrix polymer; and (d) heating the matrix polymer/zero valent selenium combination to a temperature and for a time sufficient to convert the amorphous zero valent selenium to its crystalline, trigonal form.
Inventors
- 👤 Dana G. Marsh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:00
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/08; G03G5/087
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
127 words
A method of forming a layer of particulate trigonal selenium dispersed in a polymer matrix which comprises: (a) forming a solution containing: i. dibenzoyl peroxide, ii. an organo selenium compound which interacts with dibenzoyl peroxide to form zero valent selenium, and iii. a matrix polymer which is substantially non-reactive with dibenzoyl peroxide and the organo selenium compound, in a volatile solvent; (b) applying the solution to a substrate in the form of a thin film; (c) allowing the dibenzoyl peroxide and organo selenium compound to react thereby forming amorphous zero valent selenium particles dispersed in the matrix polymer; and (d) heating the matrix polymer/zero valent selenium combination to a temperature and for a time sufficient to convert the amorphous zero valent selenium to its crystalline, trigonal form.
Claim 2
Independent Claim
127 words
A method of forming a layer of particulate trigonal selenium dispersed in a polymer matrix which comprises: (a) forming a solution containing: i. dibenzoyl peroxide, ii. an organo selenium compound which interacts with dibenzoyl peroxide to form zero valent selenium, and iii. a matrix polymer which is substantially non-reactive with dibenzoyl peroxide and the organo selenium compound, in a volatile solvent; (b) applying the solution to a substrate in the form of a thin film; (c) allowing the dibenzoyl peroxide and organo selenium compound to react thereby forming amorphous zero valent selenium particles dispersed in the matrix polymer; and (d) heating the matrix polymer/zero valent selenium combination to a temperature and for a time sufficient to convert the amorphous zero valent selenium to its crystalline, trigonal form.
Claim 3
Dependent Claim
135 words
A method in accordance with claim 1 wherein the organo selenium compound is an organo diselenide of the formula R 1 --Se--Se--R 2 wherein R 1 and R 2 are independently selected from the group of benzyl, alkyl substituted benzyl, amino substituted benzyl, amido substituted benzyl, arylalkyl substituted benzyl, aryl substituted benzyl, alkoxy alkyl substituted benzyl, amino alkyl substituted benzyl, alkyl amino substituted benzyl, aryl amino substituted benzyl, alkyl carbonyl substituted benzyl, alkyl thio substituted benzyl, alkyl seleno substituted benzyl, carboxamido substituted benzyl, halogen substituted benzyl, carboxy substituted benzyl, cyano substituted benzyl and alkyl alkoxy, amino substituted alkyl, amido substituted alkyl, aryl alkyl, alkoxy alkyl, aryloxy alkyl, hydroxy substituted alkyl, carbonyl substituted alkyl, thio substituted alkyl, seleno substituted alkyl, carboxamido substituted alkyl, halogen substituted alkyl and nitro substituted alkyl; cyclo alkyl and substituted cyclo alkyl.
Claim 4
Dependent Claim
14 words
The method of claim 1 wherein the organo selenium compound is an organo monoselenide.
Claim 5
Dependent Claim
24 words
The method of claim 3 wherein the organo monoselenide is benzomonoselenide, diphenylmethyl monoselenide, and alkyl substituted benzyl monoselneide or an aryl substituted benzyl monoselenide.
Claim 6
Dependent Claim
23 words
The method of claim 1 wherein the matrix polymer has a glass transition temperature that is accessible by heating to about 200° C.
Claim 7
Dependent Claim
16 words
The method of claim 5 wherein the matrix polymer is poly(methylmethacrylate), poly(styrene), poly(vinylalcohol), or a poly(carbonate).
Claim 8
Dependent Claim
28 words
The method of claim 1 wherein the film is heated to a temperature of from 100° to 200° C. for a period of 1 minute to 2 hours.
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) | 1981-09-18 | 1982-03-20 | 1982-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-18 | 1986-03-20 | 1986-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-18 | 1990-03-20 | 1990-09-19 | $7700.00 | Window Closed / Lapsed |