US4306049A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymers of methyl ethenyl benzene
Assignee: Mobil Oil AS
•
Filing: 1978-01-19
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Granted: 1981-12-15
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Expires: 1998-01-19
Abstract
Abstract A mixture of isomeric methyl ethenyl benzenes having a particular distribution of isomers is useful for preparing polymers with advantageous properties. The isomeric mixture may be polymerized with other monomers to produce copolymers.
Inventors
- 👤 Aristotle G. Prapas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:27
CPC Classifications
C; C08; C08F; C08F212/00; C08F212/02; C08F212/04; C08F212/06; C08F212/12
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
49 words
A high molecular weight copolymer produced by the copolymerization of a monomer selected from the group consisting of styrene, tertiary butyl styrene and acrylonitrile; and a mixture of isomers of methyl ethenyl benzene wherein said mixture of isomers are present in the following proportions by weight of the isomer.
Claim 2
Dependent Claim
49 words
A high molecular weight copolymer produced by the copolymerization of a monomer selected from the group consisting of styrene, tertiary butyl styrene and acrylonitrile; and a mixture of isomers of methyl ethenyl benzene wherein said mixture of isomers are present in the following proportions by weight of the isomer.
Claim 3
Dependent Claim
22 words
The copolymer of claim 1 in which said monomer is styrene, and said copolymer has a higher tensile modulus than styrene homopolymer.
Claim 4
Dependent Claim
37 words
The copolymer of claim 1 in which said monomer is acrylonitrile, and said copolymer has reduced affinity for hydrocarbon compared to the corresponding polymer prepared from said mixture of isomers of methyl ethenyl benzene absent acrylonitrile monomer.
Claim 5
Dependent Claim
35 words
The polymer of claim 1 in which the isomers are present in the mixture in the following proportions by weight: 1-methyl-2-ethenyl benzene 0 to 0.05% 1-methyl-3-ethenyl benzene 1 to 5% 1-methyl-4-ethenyl benzene at least 95%.
Claim 6
Dependent Claim
35 words
The polymer of claim 1 in which the isomers are present in the mixture in the following proportions by weight: 1-methyl-2-ethenyl benzene 0 to 0.05% 1-methyl-3-ethenyl benzene 1 to 3% 1-methyl-4-ethenyl benzene at least 97%.
Claim 7
Dependent Claim
11 words
The copolymer of claim 1 in which the comonomer is acrylonitrile.
Claim 8
Dependent Claim
11 words
The copolymer of claim 1 in which the comonomer is styrene.
Claim 9
Dependent Claim
13 words
The copolymer of claim 1 in which the comonomer is tertiary butyl styrene.
Claim 10
Dependent Claim
10 words
The copolymer of claim 1 which is a random copolymer.
References Cited (Backward Citations)
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Cited
US4086287A
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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) | 1984-12-14 | 1985-06-15 | 1985-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-14 | 1989-06-15 | 1989-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-14 | 1993-06-15 | 1993-12-15 | $7700.00 | Window Closed / Lapsed |