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US4130702A
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Polyacryloylaminobenzoic acid, polymethacryloylaminobenzoic acid and method of preparation
Assignee: Celanese Corp
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Filing: 1978-01-23
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Granted: 1978-12-19
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Expires: 1998-01-23
Abstract
Abstract Novel polymers derived from either acryloylaminobenzoic acid or methacryloylaminobenzoic acid are provided. The method of producing these polymers involves a free radical polymerization of the monomer at relatively low temperatures in an aqueous solution which contains an alkali metal hydroxide and a free radical initiator.
Inventors
- 👤 Eui W. Choe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:53
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/52; C08F20/54; C08F20/58
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
23 words
A polymer capable of forming an anisotropic melt consisting essentially of recurring units of the formula: ##STR5## wherein R is hydrogen or methyl.
Claim 2
Dependent Claim
23 words
A polymer capable of forming an anisotropic melt consisting essentially of recurring units of the formula: ##STR5## wherein R is hydrogen or methyl.
Claim 3
Dependent Claim
9 words
The polymer of claim 1 wherein R is methyl.
Claim 4
Dependent Claim
9 words
The polymer of claim 1 wherein R is hydrogen.
Claim 5
Dependent Claim
64 words
A process for preparing a polymer capable of forming an anisotropic melt consisting essentially of: (a) dissolving a monomer having the formula: ##STR6## wherein R is hydrogen or methyl, in an aqueous solution of an alkali metal hydroxide and in the presence of a free radical initiator, (b) allowing sufficient time for polymerization to occur, and (c) recovering the polymer from the aqueous solution.
Claim 6
Dependent Claim
64 words
A process for preparing a polymer capable of forming an anisotropic melt consisting essentially of: (a) dissolving a monomer having the formula: ##STR6## wherein R is hydrogen or methyl, in an aqueous solution of an alkali metal hydroxide and in the presence of a free radical initiator, (b) allowing sufficient time for polymerization to occur, and (c) recovering the polymer from the aqueous solution.
Claim 7
Dependent Claim
9 words
The process of claim 4 wherein R is hydrogen.
Claim 8
Dependent Claim
9 words
The process of claim 4 wherein R is methyl.
Claim 9
Dependent Claim
11 words
The process of claim 6 wherein the alkali metal is sodium.
Claim 10
Dependent Claim
29 words
The process of claim 4 wherein said mixture is maintained at a temperature of from about -10° C. to about 100° C. during a substantial portion of the reaction.
Claim 11
Dependent Claim
23 words
The process of claim 4 wherein the dissolved monomer comprises from about 0.5% to about 30% of the weight of the reaction mixture.
Claim 12
Dependent Claim
105 words
A process for preparing a polymer capable of forming an anisotropic melt consisting essentially of: (a) dissolving from about 5% to about 10% by weight of a monomer having the formula: ##STR7## wherein R is hydrogen or methyl, in an aqueous solution of sodium hydroxide and in the presence of a free radical initiator, said reaction mixture being maintained under a blanket of inert gas and at a temperature of from about 0° C. to about 5° C., (b) adding a polymerization accelerator selected from the group consisting of sodium bisulfite, ferrous sulfate and mixtures thereof, (c) allowing sufficient time for polymerization to occur, and
Claim 13
Dependent Claim
105 words
A process for preparing a polymer capable of forming an anisotropic melt consisting essentially of: (a) dissolving from about 5% to about 10% by weight of a monomer having the formula: ##STR7## wherein R is hydrogen or methyl, in an aqueous solution of sodium hydroxide and in the presence of a free radical initiator, said reaction mixture being maintained under a blanket of inert gas and at a temperature of from about 0° C. to about 5° C., (b) adding a polymerization accelerator selected from the group consisting of sodium bisulfite, ferrous sulfate and mixtures thereof, (c) allowing sufficient time for polymerization to occur, and
Claim 14
Dependent Claim
9 words
The process of claim 10 wherein R is hydrogen.
Claim 15
Dependent Claim
9 words
The process of claim 10 wherein R is methyl.
References Cited (Backward Citations)
US3344127A
Cited
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 |