Process for the preparation of cyanine dyes with polysulfonate anions
AssigneeEastman Kodak Company
InventorsTing Tao, Eduard Kottmair, Scott Beckley
Life of this patent
Estimating the term…
Abstract
A convenient and economical method for preparing infrared absorbing cyanine dyes useful in lithographic printing plate precursors is disclosed. The reaction is generally carried out by condensation of a heterocyclic base containing an activated methylene group and an unsaturated bisaldehyde or its equivalent in a solvent or solvent mixture at about 20-150° C. All the reactions necessary for production of the infrared absorbing cyanine dye may be carried out in one reaction vessel without isolating any intermediate products.
Claims17
1-5. (canceled)
A process for the production of siloxane oligomers of the general formulae I or II
- in which x is an integer from 0 to 1000, y is a number from 1 to 1000, and the substituents R are identical or different and consist of functionalised alkyl groups, (C1-C18)alkyl, (C1-C4)alkoxy, (C1-C4)haloalkoxy, phenyl, aryl, aralkyl or hydroxy groups, wherein at least one functionalised alkyl group is present per oligomer molecule, the method comprising:
- treating a halogenalkyltrihalogensilane to oligomerization in the presence of alcohol and water and co-oligomerized with at least one of a (C1-C18)-alkyl-, phenyl-, aryl- or aralkyl-trihalogensilane and silicon tetrachloride, optionally modifying a halogenalkyl function in a further step.
A rubber composition containing a siloxane oligomer of the general formulae I or II
- in which x is an integer from 0 to 1000, y is a number from 1 to 1000,
- and the substituents R are identical or different and consist of functionalised alkyl groups, (C1-C18)alkyl, (C1-C4)alkoxy, (C1-C4)haloalkoxy, phenyl, aryl, aralkyl or hydroxy groups, wherein at least one functionalised alkyl group is present per oligomer molecule as a coupling agents.
A rubber composition, comprising rubber, at least one of a precipitated silica and carbon black, and a siloxane oligomer of the general formulae I or II
- in which x is an integer from 0 to 1000, y is a number from 1 to 1000,
- and the substituents R are identical or different and consist of functionalised alkyl groups, (C1-C18)alkyl, (C1-C4)alkoxy, (C1-C4)haloalkoxy, phenyl, aryl, aralkyl or hydroxy groups, wherein at least one functionalised alkyl group is present per oligomer molecule.
A process for making a rubber composition comprising mixing a rubber with a siloxane oligomer of the general formulae I or II
- in which x is an integer from 0 to 1000, y is a number from 1 to 1000,
- and the substituents R are identical or different and consist of functionalised alkyl groups, (C1-C18)alkyl, (C1-C4)alkoxy, (C1-C4)haloalkoxy, phenyl, aryl, aralkyl or hydroxy groups, wherein at least one functionalised alkyl group is present per oligomer molecule,
- a filler and optionally a rubber auxiliary substance in at least one thermomechanical mixing stage at 100 to 170° C., and
- adding the resulting mixture to an internal kneader or roller at 40 to 110° C. together with a crosslinking agent.
A rubber tire containing a siloxane oligomer of the general formulae I or II
- in which x is an integer from 0 to 1000, y is a number from 1 to 1000,
- and the substituents R are identical or different and consist of functionalised alkyl groups, (C1-C18)alkyl, (C1-C4)alkoxy, (C1-C4)haloalkoxy, phenyl, aryl, aralkyl or hydroxy groups, wherein at least one functionalised alkyl group is present per oligomer molecule.
A shaped rubber article containing a siloxane oligomer of the general formulae I or II
- in which x is an integer from 0 to 1000, y is a number from 1 to 1000,
- and the substituents R are identical or different and consist of functionalised alkyl groups, (C1-C18)alkyl, (C1-C4)alkoxy, (C1-C4)haloalkoxy, phenyl, aryl, aralkyl or hydroxy groups, wherein at least one functionalised alkyl group is present per oligomer molecule.
A process for the production of siloxane oligomers of the general formulae I or II
- in which x is an integer from 0 to 1000, y is a number from 1 to 1000,
- and the substituents R are identical or different and consist of functionalised alkyl groups, (C1-C18)alkyl, (C1-C4)alkoxy, (C1-C4)haloalkoxy, phenyl, aryl, aralkyl or hydroxy groups, wherein at least one functionalised alkyl group is present per oligomer molecule, the method comprising:
- treating a halogenalkyltrihalogensilane to oligomerization in the presence of alcohol and water and optionally co-oligomerized with at least one of a (C1-C18)-alkyl-, phenyl-, aryl- or aralkyl-trihalogensilane and silicon tetrachloride, and
- modifying the halogenalkyl function with:
- a) ammonia and separating ammonium halide,
- b) sodium methacrylate or potassium methacrylate and separating sodium halide or potassium halide,
- c) ammonia and hydrogen sulfide or ammonium hydrogen sulfide and separating ammonium halide,
- d) sodium hydrogen sulfide or potassium hydrogen sulfide and separating sodium halide or potassium halide,
- e) sodium, potassium or ammonium rhodanide and separating sodium, potassium or ammonium halide,
- f) sodium azide and separating sodium halide, or
- g) sodium polysulfide, sodium sulfide and sulfur, or sodium polysulfide and sodium sulfide, and separating sodium halide.
Dependencies are inferred from the claim text.