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US4506083A Expired / Lapsed US ⏱️ 0.0 years remaining

Thioxanthonecarboxylic acid esters, thioesters and amides

Assignee: Novartis Corp
•
Filing: 1982-06-28
•
Granted: 1985-03-19
•
Expires: 2002-06-28
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Abstract

Abstract Thioxanthonecarboxylic acid esters, thioesters or amides of the formula I ##STR1## in which X and Z are hydrogen or one of the substituents defined in more detail in claim 1 and Y is --OR 1 , --SR 1 or --N(R 1 )(R 2 ), in which R 1 is C 1-24 alkyl and R 2 is H or R 1 , are suitable, if desired together with amines, as initiators for the photopolymerization of ethylenically unsaturated compounds or for photochemical crosslinking of polyolefines. They are also used an sensitizers for photocrosslinkable polymers. They can be prepared by methods known per se, for example by cyclization of phenylthio-phthalic, -isophthalic or -terephthalic acids, which can be correspondingly substituted, and subsequent reaction with suitable alcohols, thiols or amines.

Inventors

  • 👤 Vratislav Kvita
  • 👤 Hans Zweifel
  • 👤 Martin Roth
  • 👤 Louis Felder

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-05 22:19
CPC Classifications
C; C07; C07D; C07D209/00; C07D209/02; C07D209/44; C07D209/48; C07C; C07C323/00; C07D335/00; C07D335/04; C07D335/10; C07D335/12; C07D335/14; C07D335/16; C08; C08F; C08F2/00; C08F2/46; C08F2/48; C08F2/50; G; G03; G03F; G03F7/00; G03F7/004; G03F7/027; G03F7/028; G03F7/031; Y; Y10; Y10S; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/114; Y10S430/122; Y10S430/123

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 69 words
A compound of the formula I ##STR60## in which X is hydrogen, Z is bonded in the 7-position and is hydrogen, or alkyl having 1-4 C atoms, Y is --OR 1 , R 1 is alkyl having 1-18 atoms, cyclohexyl or --(CH 2 CH 2 O) n --CH 3 , and n is an integer from 2 to 10, the group --CO--Y being bonded in the 1-position or 3-position.
Claim 2
Dependent Claim 69 words
A compound of the formula I ##STR60## in which X is hydrogen, Z is bonded in the 7-position and is hydrogen, or alkyl having 1-4 C atoms, Y is --OR 1 , R 1 is alkyl having 1-18 atoms, cyclohexyl or --(CH 2 CH 2 O) n --CH 3 , and n is an integer from 2 to 10, the group --CO--Y being bonded in the 1-position or 3-position.
Claim 3
Dependent Claim 15 words
A compound according to claim 1, of the formula I, in which Z is hydrogen.
Claim 4
Dependent Claim 23 words
A compound according to claim 1, in which Y is --OR 1 and R 1 is alkyl having 1-18 C atoms, or cyclohexyl.
Claim 5
Dependent Claim 11 words
A compound according to claim 1, in which Z is methyl.
Claim 6
Dependent Claim 38 words
A compound according to claim 1, of the formula I, in which X is hydrogen, Z is hydrogen or alkyl, the group --CO--Y is bonded in the 1-position or 3-position and Y is alkoxy having 1-18 C atoms.

References Cited (Backward Citations)

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GB1447032A Cited
US3904647A Cited
DE2344799A1 Cited
US3981887A Cited
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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) 1988-03-18 1988-09-17 1989-03-19 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1992-03-18 1992-09-17 1993-03-19 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1996-03-18 1996-09-17 1997-03-19 $7700.00 Window Closed / Lapsed

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