US4366207A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polycarbonate resins stabilized with nitriles containing a 2-OH benzophenone group
Assignee: General Electric Co
•
Filing: 1982-05-06
•
Granted: 1982-12-28
•
Expires: 2002-05-06
Abstract
Abstract Polycarbonate resins, can be stabilized against the adverse influence of UV light by incorporating either directly into the resin or by means of a coating on the surface of the resin, an effective amount of a certain class of cyano stabilizers.
Inventors
- 👤 Blair T. Anthony
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:01
CPC Classifications
C; C07; C07C; C07C255/00; C08; C08K; C08K5/00; C08K5/16; C08K5/315; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31507
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
31 words
A comparison of matter comprising (1) a polycarbonate resin susceptible to degradation by ultraviolet light and (2) an effective amount of a UV stabilizer selected from the class consisting of ##STR17##
Claim 2
Dependent Claim
31 words
A comparison of matter comprising (1) a polycarbonate resin susceptible to degradation by ultraviolet light and (2) an effective amount of a UV stabilizer selected from the class consisting of ##STR17##
Claim 3
Dependent Claim
31 words
A composition of matter comprising (1) a polycarbonate resin susceptible to degradation by ultraviolet light and (2) an effective amount of a UV stabilizer comprising a compound having the formula ##STR18##
Claim 4
Dependent Claim
31 words
A composition of matter comprising (1) a polycarbonate resin susceptible to degradation by ultraviolet light and (2) an effective amount of a UV stabilizer comprising a compound having the formula ##STR18##
Claim 5
Dependent Claim
31 words
A composition of matter comprising (1) a polycarbonate resin susceptible to degradation by ultraviolet light and (2) an effective amount of a UV stabilizer comprising a compound having the formula ##STR19##
Claim 6
Dependent Claim
31 words
A composition of matter comprising (1) a polycarbonate resin susceptible to degradation by ultraviolet light and (2) an effective amount of a UV stabilizer comprising a compound having the formula ##STR19##
Claim 7
Dependent Claim
30 words
A composition as in claim 1 wherein the UV stabilizer is present in an amount ranging from 0.5 to 10%, by weight, based on the weight of the polycarbonate resin.
Claim 8
Dependent Claim
20 words
A composition as in claim 2 wherein the polycarbonate resin is in the form of a film or thick sheet.
Claim 9
Dependent Claim
21 words
A composition as in claim 3 wherein the poly carbonate resin is in the form of a film or thick sheet.
Claim 10
Dependent Claim
17 words
A composition as in claim 2 wherein the UV stabilizer is homogeneously dispersed throughout the polycarbonate resin.
Claim 11
Dependent Claim
17 words
A composition as in claim 3 wherein the UV stabilizer is homogeneously dispersed throughout the polycarbonate resin.
Claim 12
Dependent Claim
53 words
A composition as in claim 2 wherein the polycarbonate resin being protected against the effects of ultraviolet light is so protected by means of a thin coating of a resinous composition containing the UV stabilizer dispersed homogeneously throughout the thin coating, which in turn is disposed on the surface of the polycarbonate substrate.
Claim 13
Dependent Claim
54 words
A composition as in claim 3 wherein the poly carbonate resin being protected against the effects of ultraviolet light is so protected by means of a thin coating of a resinous composition containing the UV stabilizer dispersed homogeneously throughout the thin coating, which in turn is disposed on the surface of the polycarbonate substrate.
Claim 14
Dependent Claim
6 words
A compound of the formula ##STR20##
Claim 15
Dependent Claim
6 words
A compound of the formula ##STR20##
Claim 16
Dependent Claim
6 words
A compound of the formula ##STR21##
Claim 17
Dependent Claim
6 words
A compound of the formula ##STR21##
Claim 18
Dependent Claim
9 words
A composition selected from the class consisting of ##STR22##
Claim 19
Dependent Claim
9 words
A composition selected from the class consisting of ##STR22##
Claim 20
Independent Claim
36 words
The method for improving the U-V stability of polycarbonate resins susceptible to degradation by ultraviolet light which comprises incorporating in said polycarbonate resin an effective amount of a UV-stabilizer selected from the class consisting of: ##STR23##
Claim 21
Independent Claim
36 words
The method for improving the U-V stability of polycarbonate resins susceptible to degradation by ultraviolet light which comprises incorporating in said polycarbonate resin an effective amount of a UV-stabilizer selected from the class consisting of: ##STR23##
Claim 22
Dependent Claim
11 words
The process as in claim 14, wherein the stabilizer is: ##STR24##
Claim 23
Dependent Claim
11 words
The process as in claim 14 wherein the stabilizer is: ##STR25##
Claim 24
Dependent Claim
29 words
The process as in claim 14 wherein the stabilizer is incorporated in an amount ranging from 0.5 to 10%, by weight, based on the weight of the polycarbonate resin.
Claim 25
Dependent Claim
17 words
The process as in claim 14 wherein the UV stabilizer is homogeneously dispersed throughout the polycarbonate resin.
Claim 26
Dependent Claim
53 words
The process as in claim 14 wherein the polycarbonate resin being protected against the effects of ultraviolet light is so protected by means of a thin coating of a resinous composition containing the UV stabilizer dispersed homogeneously throughout the thin coating which in turn is disposed on the surface of the polycarbonate substrate.
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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) | 1985-12-27 | 1986-06-28 | 1986-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-27 | 1990-06-28 | 1990-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-27 | 1994-06-28 | 1994-12-28 | $7700.00 | Window Closed / Lapsed |