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US4034001A
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Bis-amidoalkanesulfonic acids and salts thereof
Assignee: Lubrizol Corp
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Filing: 1975-07-28
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Granted: 1977-07-05
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Expires: 1995-07-28
Abstract
Abstract Bis-amidoalkanesulfonic acids and their salts find use in applications where amides and sulfonic compounds are useful. Bis-acrylamides and the like are polymerizable monomers whose polymers are useful as gelling agents for aqueous systems, as well as for the preparation of fibers, plastics, resins, etc.
Inventors
- 👤 Leonard Edward Miller
- 👤 Donald Leon Murfin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:04
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/52; C08F20/54; C08F20/60; Y; Y10; Y10S; Y10S524/00; Y10S524/91; Y10S524/911
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
42 words
A compound having the formula ##STR6## wherein R 1 is an alkenyl radical having no more than about 12 carbon atoms and each of R 2 and R 3 is hydrogen or an alkyl radical having up to about 18 carbon atoms.
Claim 2
Dependent Claim
42 words
A compound having the formula ##STR6## wherein R 1 is an alkenyl radical having no more than about 12 carbon atoms and each of R 2 and R 3 is hydrogen or an alkyl radical having up to about 18 carbon atoms.
Claim 3
Dependent Claim
22 words
A compound according to claim 1 wherein R 1 is vinyl and each of R 2 and R 3 is lower alkyl.
Claim 4
Dependent Claim
16 words
A compound according to claim 2 wherein each of R 2 and R 3 is methyl.
Claim 5
Dependent Claim
56 words
A compound having the formula ##STR7## wherein R 1 is an alkenyl radical having no more than about 12 carbon atoms; each of R 2 and R 3 is hydrogen or an alkyl radical having up to about 18 carbon atoms; and M is one equivalent of an alkali metal, alkaline earth metal or ammonium cation.
Claim 6
Dependent Claim
56 words
A compound having the formula ##STR7## wherein R 1 is an alkenyl radical having no more than about 12 carbon atoms; each of R 2 and R 3 is hydrogen or an alkyl radical having up to about 18 carbon atoms; and M is one equivalent of an alkali metal, alkaline earth metal or ammonium cation.
Claim 7
Dependent Claim
22 words
A compound according to claim 4, wherein R 1 is vinyl and each of R 2 and R 3 is lower alkyl.
Claim 8
Dependent Claim
16 words
A compound according to claim 5, wherein each of R 2 and R 3 is methyl.
Claim 9
Dependent Claim
65 words
A method for preparing a compound according to claim 1 which comprises reacting, at a temperature between about -30° and 250° C., an aldehyde of the formula ##STR8## with a nitrile of the formula R 1 CN and a sulfonating agent comprising sulfuric acid, sulfur trioxide or fuming sulfuric acid, wherein R 1 , R 2 and R 3 are as defined in claim 1.
Claim 10
Dependent Claim
17 words
A method according to claim 7 wherein the sulfonating agent is sulfuric acid or fuming sulfuric acid.
Claim 11
Dependent Claim
13 words
A method according to claim 8 wherein the reaction is carried out continuously.
Claim 12
Dependent Claim
22 words
A method according to claim 8 wherein R 1 is vinyl and each of R 2 and R 3 is lower alkyl.
Claim 13
Dependent Claim
16 words
A method according to claim 10 wherein each of R 2 and R 3 is methyl.
Claim 14
Dependent Claim
13 words
A method according to claim 11 wherein the reaction is carried out continuously.
Claim 15
Dependent Claim
69 words
A method for preparing a compound according to claim 1 which comprises sulfonating, at a temperature between about -30° and 250° C., an aldehyde of the formula ##STR9## with sulfuric acid, sulfur trioxide or fuming sulfuric acid to form an α-sulfoaldehyde, and subsequently reacting said α-sulfoaldehyde with a nitrile of the formula R 1 CN, wherein R 1 R 2 and R 3 are as defined in claim 1.
Claim 16
Dependent Claim
33 words
A method according to claim 13 wherein R 1 is vinyl, each of R 2 and R 3 is lower alkyl and the sulfonation is effected with sulfuric acid or fuming sulfuric acid.
Claim 17
Dependent Claim
16 words
A method according to claim 14 wherein each of R 2 and R 3 is methyl.
References Cited (Backward Citations)
US2983712A
Cited
US3235549A
Cited
US3344174A
Cited
US3531442A
Cited
US3478091A
Cited
US3544597A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-07-04 | 1981-01-03 | 1981-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-04 | 1985-01-03 | 1985-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-04 | 1989-01-03 | 1989-07-05 | $7700.00 | Window Closed / Lapsed |