US3852237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clearer polyefins by combination of aryl carboxlic acid phthalocyanine, and quinacridone
Assignee: Phillips Petroleum Co
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Filing: 1972-09-08
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Granted: 1974-12-03
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Expires: 1992-09-08
Abstract
Abstract A combination of agents, such as sodium benzoate with phthalocyanine, markedly improves the clarity of nucleated polyolefin, such as polypropylene, in molded objects. The haze experienced with a single nucleating agent is substantially reduced.
Inventors
- 👤 C Osborn
- 👤 P Milam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:38
CPC Classifications
C; C08; C08K; C08K5/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
78 words
A POLYOLEFIN COMPOSITION CHARACTERIZED BY LOW HAZE AND HIGH LIGHT TRANSMISSION COMPRISING AT LEAST ONE POLYOLEFIN AND A NUCLEATING AMOUNT OF EACH OF (1) AT LEAST ONE ARYL CARBOXYLIC ACID COMPOUND, (II) AT LEAST ONE PTHALOCYANINE, AND (III) AT LEAST ONE QUINACRIDONE, WHEREIN SAID ARYL CARBOXYLIC ACID COMPOUND IS MONO OR DICARBOXYLIC ARYL HYDROCARBON ACID GROUP IA OR IIA METAL SALT THEREOF AND WHEREIN AT LEAST ONE CARBOXYLIC ACID GROUP IS ATTACHED TO THE ARYL RING REPRESENT BY
Claim 2
Dependent Claim
78 words
A POLYOLEFIN COMPOSITION CHARACTERIZED BY LOW HAZE AND HIGH LIGHT TRANSMISSION COMPRISING AT LEAST ONE POLYOLEFIN AND A NUCLEATING AMOUNT OF EACH OF (1) AT LEAST ONE ARYL CARBOXYLIC ACID COMPOUND, (II) AT LEAST ONE PTHALOCYANINE, AND (III) AT LEAST ONE QUINACRIDONE, WHEREIN SAID ARYL CARBOXYLIC ACID COMPOUND IS MONO OR DICARBOXYLIC ARYL HYDROCARBON ACID GROUP IA OR IIA METAL SALT THEREOF AND WHEREIN AT LEAST ONE CARBOXYLIC ACID GROUP IS ATTACHED TO THE ARYL RING REPRESENT BY
Claim 3
Dependent Claim
72 words
The composition according to claim 1 wherein said nucleating amount of said aryl carboxylic acid compound represents about 0.001 to 0.5 weight percent of said polyolefin, said nucleating amount of said phthalocyanine represents about 0.0005 and 0.02 weight percent relative to the weight of said polyolefin, and wherein said nucleating amount of said quinacridone is in the range of about 0.0005 to 0.02 weight percent based on the weight of said polyolefin.
Claim 4
Dependent Claim
60 words
The polyolefin composition according to claim 1 wherein said nucleating amount of said aryl carbOxylic acid compound is in the range of about 0.01 to 0.05 weight percent, said phthalocyanine is in the range of about 0.005 to 0.01 weight percent, and said quinacridone is in the range of about 0.005 to 0.01 weight percent, each relative to said polyolefin.
Claim 5
Dependent Claim
25 words
The composition according to claim 3 wherein said polyolefin is a polymer of at least one alpha-monoolefin of 2 to 8 carbon atoms per molecule.
Claim 6
Dependent Claim
23 words
The composition according to claim 4 wherein said aryl carboxylic acid is a mono or dicarboxylic acid or Group IA metal salt thereof.
Claim 7
Dependent Claim
11 words
The composition according to claim 5 wherein said poly(1-monoolefin) is polypropylene.
Claim 8
Dependent Claim
26 words
The composition according to claim 6 wherein said aryl carboxylic acid compound is sodium benzoate, said phthalocyanine is phthalocyanine blue, and said quinacridone is quinacridone red.
Claim 9
Dependent Claim
43 words
The composition according to claim 1 wherein said aryl carboxylic acid compound is benzoic acid, ortho-methylbenzoic acid, p-methylbenzoic acid, p-ethylbenzoic acid, p-isopropylbenzoic acid, o-tertiary-butylbenzoic acid, phthalic acid, tetramethylphthalic acid, trimethyldiethylbenzoic acid, or a Group IA or IIA metal salt of any of these.
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) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |