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US4931094A Expired / Lapsed US ⏱️ 0.0 years remaining

Titanium(IV)-chelates and their use in printing inks

Assignee: EIDP Inc
•
Filing: 1988-10-03
•
Granted: 1990-06-05
•
Expires: 2008-10-03
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Abstract

Abstract Novel alkoxy titanium(IV)-chelates are used to modify printing inks based on nitrocellulose or other cellulose ester derivatives. The novel chelates comprise citric acid alkyl esters as chelate formers. They delay, as other titanium chelates do, the well-known catalytic effect of the titanium component in cross-linking reactions. When used in printing inks, the novel titanium chelates and their alcoholic solutions have the advantage that they have an insignificant color of their own, so that they practically do not discolor the printing inks. A further advantage of the novel chelates resides in that they do not enter into alteration effects with antioxidants based on phenol, so that they can also be used for printing inks which are to be applied to polymeric substrates containing such antioxidants without the occurence of discoloration.

Inventors

  • 👤 Dieter Barfurth
  • 👤 Claus Lindzus
  • 👤 Heinz Nestler

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-09 03:35
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/02; C09D11/14; C07; C07F; C07F7/00; C07F7/003

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 43 words
A titanium chelate of the formula: Ti(OR).sub.4-n (citrate).sub.n wherein R is ethyl, propyl, isobutyl or butyl, n is 1 or 2, and citrate is the radical of a monoalkyl or dialkyl citrate, the alkyl moiety of which is ethyl, propyl, isobutyl or butyl.
Claim 2
Dependent Claim 43 words
A titanium chelate of the formula: Ti(OR).sub.4-n (citrate).sub.n wherein R is ethyl, propyl, isobutyl or butyl, n is 1 or 2, and citrate is the radical of a monoalkyl or dialkyl citrate, the alkyl moiety of which is ethyl, propyl, isobutyl or butyl.
Claim 3
Dependent Claim 69 words
A solution of a titanium chelate of the formula Ti(OR).sub.4-n (citrate).sub.n:ps wherein R is ethyl, propyl, isobutyl or butyl, n is 1 or 2, and citrate is the radical of a monoalkyl or dialkyl citrate, the alkyl moiety of which is ethyl, propyl, isobutyl or butyl in an alkanol of the formula ROH wherein R has the meanings previously defined and is identical to R in said titanium chelate.
Claim 4
Dependent Claim 69 words
A solution of a titanium chelate of the formula Ti(OR).sub.4-n (citrate).sub.n:ps wherein R is ethyl, propyl, isobutyl or butyl, n is 1 or 2, and citrate is the radical of a monoalkyl or dialkyl citrate, the alkyl moiety of which is ethyl, propyl, isobutyl or butyl in an alkanol of the formula ROH wherein R has the meanings previously defined and is identical to R in said titanium chelate.
Claim 5
Dependent Claim 31 words
The method of preparing a titanium chelate of claim 1, which comprises reacting a tetraalkyl titanate with a citric acid dialkyl ester, and distilling off the alcohol liberated by the reaction.
Claim 6
Dependent Claim 42 words
The method of preparing an alkanolic solution of claim 2, which comprises reacting a tetraalkyl titanate with a citric acid dialkyl ester at a temperature between 20°and 100° C., and evaporating the alcohol in the reaction mixture to the desired alcohol content.
Claim 7
Dependent Claim 16 words
A printing ink composition comprising a printing ink and a titanium chelate solution of claim 2.

References Cited (Backward Citations)

US2966505A Cited
US3090728A Cited
US3387994A Cited
US3682688A Cited
US4113757A Cited
US4617408A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1993-06-04 1993-12-04 1994-06-05 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1997-06-04 1997-12-04 1998-06-05 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2001-06-04 2001-12-04 2002-06-05 $7700.00 Window Closed / Lapsed

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