US3928264A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymeric ultraviolet light stabilizers prepared from phenol-formaldehyde condensates
Assignee: Monsanto Co
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Filing: 1974-05-17
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Granted: 1975-12-23
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Expires: 1994-05-17
Abstract
Abstract This invention relates to polymeric ultraviolet light stabilizers which are the esterification products of (A) phenolformaldehyde condensates, which have at least 12.5 mol % of the positions ortho to the esterifiable hydroxyl group unsubstituted, and (B) a compound capable of esterification with the phenol formaldehyde condensate which contains at least one ring of six carbon atoms characterized by having benzenoid unsaturation. Upon exposure to ultraviolet light, the exposed portion of the ester rearranges to form a polymeric compound which is a barrier to ultraviolet light.
Inventors
- 👤 Jr Raymond H Young
- 👤 Albert H Markhart
- 👤 Joseph G Martins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:38
CPC Classifications
C; C08; C08L; C08L101/00; C08G; C08G8/00; C08G8/28; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/31859; Y10T428/31877; Y10T428/31942; Y10T428/31949; Y10T428/31957; Y10T428/31964; Y10T428/31967
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
32 words
A SYNTHETIC RESIN POLYMER PROTECTED WITH AN EFFECTIVE AMOUNT OF A POLYMERIC LIGHT STABILIZER WHICH IS ALSO A BARRIER PRISING: A. FROM 1 TO 99 MOL % OF THE FOLLOWING RECURRING UNIT:
Claim 2
Dependent Claim
32 words
A SYNTHETIC RESIN POLYMER PROTECTED WITH AN EFFECTIVE AMOUNT OF A POLYMERIC LIGHT STABILIZER WHICH IS ALSO A BARRIER PRISING: A. FROM 1 TO 99 MOL % OF THE FOLLOWING RECURRING UNIT:
Claim 3
Dependent Claim
23 words
The synthetic resin polymer of claim 1 wherein the R1 radical of the polymeric light stabilizer is selected from the group consisting of:
Claim 4
Dependent Claim
57 words
The synthetic resin polymer of claim 1 wherein the R1 radical of the polymeric light stabilizer is selected from the group consisting of phenyl, p-methoxyphenyl, p-chlorophenyl, m-nitrophenyl, p-(aminosulfonyl) phenyl, 3,5-dibromophenyl, 4-(phenyl) phenyl, 4-(phenoxy) phenyl, p-(phenyl dimethyl silyl) phenyl, 3,4-(methylenedioxy) phenyl, p-(methylthio) phenyl, p-toluyl, p(4-phenyl-n-butyl) phenyl, p-(dimethylamino) phenyl and 3,5-dimethyl phenyl and wherein the R radical is hydrogen.
Claim 5
Dependent Claim
17 words
The synthetic resin polymer of claim 1 wherein the polymeric light stabilizer is dispersed throughout the polymer.
Claim 6
Dependent Claim
20 words
The synthetic resin polymer of claim 1 wherein the polymeric light stabilizer is in the form of a protective film.
Claim 7
Dependent Claim
13 words
The synthetic resin polymer of claim 1 wherein the polymer is polyvinyl chloride.
Claim 8
Dependent Claim
39 words
A cellulosic material protected with an effective amount of a polymeric light stabilizer which is also a barrier to ultraviolet light, which stabilizer comprises a polymer comprising: A. from 1 to 99 mol % of the following recurring unit:
Claim 9
Dependent Claim
39 words
A cellulosic material protected with an effective amount of a polymeric light stabilizer which is also a barrier to ultraviolet light, which stabilizer comprises a polymer comprising: A. from 1 to 99 mol % of the following recurring unit:
Claim 10
Dependent Claim
22 words
The cellulosic material of claim 7 wherein the R1 radical of the polymeric light stabilizer is selected from the group consisting of:
Claim 11
Dependent Claim
56 words
The cellulosic material of claim 1 wherein the R1 radical of the polymeric light stabilizer is selected from the group consisting of phenyl, p-methoxyphenyl, p-chlorophenyl, m-nitrophenyl, p-(aminosulfonyl) phenyl, 3,5-dibromphenyl, 4-(phenyl) phenyl, 4-(phenoxy) phenyl, p-(phenyl dimethyl silyl) phenyl, 3,4-(methylenedioxy) phenyl, p-(methylthio) phenyl, p-toluyl, p(4-phenyl-n-butyl) phenyl, p-(dimethylamino) phenyl and 3,5-dimethyl phenyl and wherein the R radical is hydrogen.
Claim 12
Dependent Claim
17 words
The cellulosic material of claim 7 wherein the polymeric light stabilizer is dispersed throughout the cellulosic material.
Claim 13
Dependent Claim
19 words
The cellulosic material of claim 7 wherein the polymeric light stabilizer is in the form of a protective film.
Claim 14
Dependent Claim
20 words
The cellulosic material of claim 7 wherein the cellulosic material is selected from the group consisting of wood and pAper.
References Cited (Backward Citations)
US3330884A
Cited
US3817924A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-22 | 1979-06-23 | 1979-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-22 | 1983-06-23 | 1983-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-22 | 1987-06-23 | 1987-12-23 | $7700.00 | Window Closed / Lapsed |