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US3665031A Expired / Lapsed US ⏱️ 0.0 years remaining

Water-soluble phenolic antioxidants

Assignee: Novartis Corp
•
Filing: 1968-09-16
•
Granted: 1972-05-23
•
Expires: 1988-09-16
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Abstract

Abstract Water-soluble compounds of the general formula (A - Y -)nZ(-SO3 M )m WHEREIN A represents the radical of a sterically hindered phenol of the benzene series, Y represents a bridge wherein the acyclic bridging member contains a carboxylic acid amide group as chain member, Z represents an aliphatic radical or a carbocyclic aromatic radical, containing at most two mono- or bi- cyclic nuclei, M represents one equivalent of a cation solvatizable by water, and M AND N INDEPENDENTLY OF EACH OTHER REPRESENT 1 OR 2, AND THEIR WATER SOLUBLE SALTS ARE DISCLOSED AS ANTIOXIDANTS USEFUL FOR THE STABILIZATION OF ORGANIC POLYMERS CONTAINING BASIC GROUPS AGAINST DETERIORATION DUE TO HEAT AND/OR OXYGEN. In contrast to known stabilizing agents, the novel compounds need not be incorporated into the polymerization or polycondensation process for producing the materials to be protected or into a melt of such materials but can be applied to the finished organic products in an after-treatment, for instance by drawing thereon from an aqueous bath.

Inventors

  • 👤 Hans Jakob Peterli
  • 👤 Ernst Keller
  • 👤 Kurt Schwarzenbach

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-08 05:19
CPC Classifications
C; C09; C09K; C09K15/00; C09K15/04; C09K15/28; C07; C07C; C07C309/00; C07C309/01; C07C309/02; C07C309/03; C07C309/13; C07C309/14; C07C309/15; C07C309/28; C07C309/45; C07C309/51; C08; C08K; C08K5/00; C08K5/16; C08K5/20; C08K5/36; C08K5/41; C08K5/42; D; D06; D06M; D06M13/00; D06M13/322; D06M13/325; D06M13/342; D06M13/402

Claims Analysis

Total Claims: 13
Claim 1
Independent Claim 19 words
A compound as defined in claim 1, wherein R1 represents branched alkyl of from three to 12 carbon atoms.
Claim 2
Dependent Claim 26 words
A compound as defined in claim 2 wherein is wherein R4 is hydrogen or lower alkyl, and q is an integer ranging from 0 to 2.
Claim 3
Dependent Claim 19 words
A compound as defined in claim 3, wherein R1 represents tertiary alkyl of from four to 12 carbon atoms.
Claim 4
Dependent Claim 18 words
A compound as defined in claim 4, wherein R1 represents tert-butyl and R2 represents hydrogen, methyl or tert-butyl.
Claim 5
Dependent Claim 15 words
A compound as defined in claim 4, wherein q represents 2 and R4 represents hydrogen.
Claim 6
Dependent Claim 101 words
A compound as defined in claim 4 wherein Z'' represents, depending on the values of m and n, a divalent, trivalent or tetravalent group selected from (a) alkylene group of from two to five carbon atoms when each of m and n is 1, (b) a divalent or trivalent benzene group when n is 1 and m is 1 or 2, or when m is 1 and n is 2, and (c) a divalent, trivalent or tetravalent group selected from naphthylene, diphenyl ether, diphenyl thioether, stilbene or phenylene ethylene phenylene groups when each of m and n is 1 or 2.
Claim 7
Dependent Claim 31 words
A compound as defined in claim 5, wherein m represents 1, and Z'' represents ethylene, a di- or trivalent radical of benzene or naphthalene or a divalent radical of diphenyl ether.
Claim 8
Dependent Claim 18 words
A compound as defined in claim 1, which is selected from N-(4-hydroxy-3,5-di-tert-butylbenzoyl)-aniline-3-sulphonic acid and a water-soluble salt thereof.
Claim 9
Dependent Claim 21 words
A compound as defined in claim 1, which is selected from 1-N( Beta -(4-hydroxy-3,5-di-tert-butyl-phenyl)-propionyl)-amino-naphthalene-8 -sulphonic acid, and a water-soluble salt thereof.
Claim 10
Dependent Claim 20 words
A compound as defined in claim 1, which is selected from 1-N-( Beta -(4-hydroxy-3,5-di-tert-butylphenyl)-propionyl)-amino-benzene-3-sulphonic acid, and a water-soluble salt thereof.
Claim 11
Dependent Claim 21 words
A compound as defined in claim 1, which is selected from 2-N-( Beta -(4-hydroxy-3,5-di-tert-butylphenyl)-propionyl)-amino-diphenyl ether-4-sulphonic acid, and a water-soluble salt thereof.
Claim 12
Dependent Claim 20 words
A compound as defined in claim 1, which is selected from 2-N-( Beta -(4-hydroxy-3,5-di-tert-butylphenyl)-propionyl)-amino-ethane-1-sulphonic acid, and a water-soluble salt thereof.
Claim 13
Dependent Claim 14 words
A compound selected from 1-N-( Beta -(4-hydroxy-3,5-di-tert-butylphenyl)propionyl)-aminobenzene-1-sulphonic acid and a water soluble salt thereof.

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) 1975-05-23 1975-11-22 1976-05-23 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-05-23 1979-11-22 1980-05-23 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-05-23 1983-11-22 1984-05-23 $7700.00 Window Closed / Lapsed

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