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US4130719A
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Method of making high purity monomers from dicarboxylic acid monoesters and resultant polymers
Assignee: BP Corp North America Inc
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Filing: 1976-07-01
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Granted: 1978-12-19
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Expires: 1996-07-01
Abstract
Abstract High purity monomers, such as methyl p-hydroxymethylbenzoate, are produced by selective reduction of dicaboxylic acid monoesters with diborane. The resultant monomers are suitable for producing new polymers with improved physical properties.
Inventors
- 👤 Steven A. Cerefice
- 👤 Ellis K. Fields
- 👤 Kerford A. Marchant, Jr.
- 👤 Edward E. Paschke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:49
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/06; C08G63/065; C07; C07C; C07C51/00; C07C51/09; C08G61/00; C08G61/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
18 words
As a composition of matter, poly (m-methylenebenzoate) characterized by an inherent viscosity of at least about 0.44 dl./g.
Claim 2
Dependent Claim
18 words
As a composition of matter, poly (m-methylenebenzoate) characterized by an inherent viscosity of at least about 0.44 dl./g.
Claim 3
Dependent Claim
7 words
As a composition of matter, poly (6-methylene-2-naphthoate).
Claim 4
Dependent Claim
7 words
As a composition of matter, poly (6-methylene-2-naphthoate).
Claim 5
Dependent Claim
43 words
As a composition of matter, a resinous polymer containing (p-methylenebenzoate) units characterized by an inherent viscosity from about 0.6 to 1.5 dl./g. as determined in a solvent containing 60 percent phenol and 40 percent tetrachloroethane by weight, said polymer exhibiting high impact strength.
Claim 6
Dependent Claim
43 words
As a composition of matter, a resinous polymer containing (p-methylenebenzoate) units characterized by an inherent viscosity from about 0.6 to 1.5 dl./g. as determined in a solvent containing 60 percent phenol and 40 percent tetrachloroethane by weight, said polymer exhibiting high impact strength.
Claim 7
Dependent Claim
11 words
The composition of claim 3 wherein the polymer is a homopolymer.
Claim 8
Dependent Claim
22 words
The composition of claim 4 wherein the polymer is characterized by an inherent viscosity of from about 0.6 to about 0.9 dl./g.
Claim 9
Dependent Claim
15 words
The composition of claim 3 wherein the polymer is a copolymer containing (ethylene terephthalate) units.
Claim 10
Dependent Claim
14 words
The composition of claim 3 wherein the polymer is a copolymer containing (m-methylenebenzoate) units.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-12-18 | 1982-06-19 | 1982-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-18 | 1986-06-19 | 1986-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-18 | 1990-06-19 | 1990-12-19 | $7700.00 | Window Closed / Lapsed |