US4024106A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2,4-Dihydroxy-4-pentadecyl benzophenone and compositions containing the same
Assignee: 3M Co
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Filing: 1975-11-17
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Granted: 1977-05-17
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Expires: 1995-11-17
Abstract
Abstract 2,4'-Dihydroxy-4-pentadecyl benzophenone is prepared by mixing in the presence of an acid catalyst equimolar amounts of meta pentadecyl phenol and parahydroxy benzoic acid. Thermoplastic resins, normally susceptible to degradation upon prolonged exposure to ultraviolet light, become resistant to such degradation when a small amount of 2,4'-dihydroxy-4-pentadecyl benzophenone is blended therein.
Inventors
- 👤 Roger A. Mader
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:33
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/07; C07; C07C; C07C45/00; C07C45/45; C07C45/46; C07C49/00; C07C49/76; C07C49/82; C07C49/83
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
32 words
A composition comprising a thermoplastic resin which is normally subject to degradation upon prolonged exposure to ultraviolet light rays and a small but effective amount of 2,4'-dihydroxy-4-pentadecyl benzophenone to inhibit said degradation.
Claim 2
Dependent Claim
32 words
A composition comprising a thermoplastic resin which is normally subject to degradation upon prolonged exposure to ultraviolet light rays and a small but effective amount of 2,4'-dihydroxy-4-pentadecyl benzophenone to inhibit said degradation.
Claim 3
Dependent Claim
28 words
The composition of claim 1 wherein said thermoplastic resin is selected from the group consisting of cellulose resin, epoxide resin, polyester, polypropylene, polyethylene, polystyrene, poly(vinylchloride) and poly(vinylidene chloride).
Claim 4
Dependent Claim
42 words
A composition comprising from about 97.5 to about 99.95 percent by weight of a thermoplastic resin which is normally subject to degradation upon prolonged exposure to ultraviolet light rays and correspondingly from about 2.5 to about 0.05 percent by weight 2,4'-dihydroxy-4-pentadecyl benzophenone.
Claim 5
Dependent Claim
42 words
A composition comprising from about 97.5 to about 99.95 percent by weight of a thermoplastic resin which is normally subject to degradation upon prolonged exposure to ultraviolet light rays and correspondingly from about 2.5 to about 0.05 percent by weight 2,4'-dihydroxy-4-pentadecyl benzophenone.
Claim 6
Dependent Claim
28 words
The composition of claim 3 wherein said thermoplastic resin is selected from the group consisting of cellulose resin, epoxide resin, polyester, polypropylene, polyethylene, polystyrene, poly(vinylchloride) and poly(vinylidene chloride).
Claim 7
Dependent Claim
16 words
A polypropylene composition containing blended therein from about 0.05% to about 2.5% by weight 2,4'-dihydroxy-4-pentadecyl benzophenone.
Claim 8
Dependent Claim
16 words
A polypropylene composition containing blended therein from about 0.05% to about 2.5% by weight 2,4'-dihydroxy-4-pentadecyl benzophenone.
Claim 9
Dependent Claim
15 words
A shaped article comprising a self-supporting shaped structure formed of the composition of claim 1.
Claim 10
Dependent Claim
26 words
Polypropylene film having dispersed therein a small but effective amount of 2,4'-dihydroxy-4-pentadecyl benzophenone sufficient to inhibit ultraviolet light degradation of the polypropylene contained in the film.
Claim 11
Dependent Claim
26 words
Polypropylene film having dispersed therein a small but effective amount of 2,4'-dihydroxy-4-pentadecyl benzophenone sufficient to inhibit ultraviolet light degradation of the polypropylene contained in the film.
Claim 12
Dependent Claim
23 words
The polypropylene film of claim 7 wherein said 2,4'-dihydroxy-4-pentadecyl benzophenone comprises from about 0.05% to about 2.5% of the weight of said film.
Claim 13
Independent Claim
30 words
A method of inhibiting ultraviolet light degradation of thermoplastic resin comprising homogeneously blending into said resin a small but effective amount of 2,4'-dihydroxy-4-pentadecyl benzophenone sufficient to inhibit ultraviolet light degradation.
Claim 14
Independent Claim
30 words
A method of inhibiting ultraviolet light degradation of thermoplastic resin comprising homogeneously blending into said resin a small but effective amount of 2,4'-dihydroxy-4-pentadecyl benzophenone sufficient to inhibit ultraviolet light degradation.
Claim 15
Dependent Claim
22 words
The method of claim 9 wherein said small but effective amount is from about 0.05% to about 2.5% by weight 2,4'-dihydroxy-4-pentadecyl benzophenone.
Claim 16
Dependent Claim
2 words
2,4'-dihydroxy-4-pentadecyl benzophenone.
Claim 17
Dependent Claim
2 words
2,4'-dihydroxy-4-pentadecyl benzophenone.
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) | 1980-05-16 | 1980-11-15 | 1981-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-16 | 1984-11-15 | 1985-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-16 | 1988-11-15 | 1989-05-17 | $7700.00 | Window Closed / Lapsed |