EP0632162B1 - Feuille infalsifiable par agents chimiques et document infalsifiable obtenu - Google Patents
Feuille infalsifiable par agents chimiques et document infalsifiable obtenu Download PDFInfo
- Publication number
- EP0632162B1 EP0632162B1 EP94400090A EP94400090A EP0632162B1 EP 0632162 B1 EP0632162 B1 EP 0632162B1 EP 94400090 A EP94400090 A EP 94400090A EP 94400090 A EP94400090 A EP 94400090A EP 0632162 B1 EP0632162 B1 EP 0632162B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- acid
- chosen
- acids
- sheet according
- salts
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000013043 chemical agent Substances 0.000 title claims description 3
- 150000003839 salts Chemical class 0.000 claims description 33
- 239000002253 acid Substances 0.000 claims description 24
- 239000003795 chemical substances by application Substances 0.000 claims description 16
- 150000001875 compounds Chemical class 0.000 claims description 15
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 14
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 claims description 13
- 239000003153 chemical reaction reagent Substances 0.000 claims description 12
- 150000007524 organic acids Chemical class 0.000 claims description 12
- 229910052751 metal Inorganic materials 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 9
- 235000001014 amino acid Nutrition 0.000 claims description 8
- 150000001413 amino acids Chemical class 0.000 claims description 8
- ZTQSAGDEMFDKMZ-UHFFFAOYSA-N Butyraldehyde Chemical compound CCCC=O ZTQSAGDEMFDKMZ-UHFFFAOYSA-N 0.000 claims description 7
- 150000007513 acids Chemical class 0.000 claims description 7
- 150000001299 aldehydes Chemical group 0.000 claims description 7
- 150000008064 anhydrides Chemical class 0.000 claims description 7
- 239000001569 carbon dioxide Substances 0.000 claims description 7
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 7
- 239000002243 precursor Substances 0.000 claims description 7
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 6
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical compound OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 claims description 6
- KQTIIICEAUMSDG-UHFFFAOYSA-N tricarballylic acid Chemical compound OC(=O)CC(C(O)=O)CC(O)=O KQTIIICEAUMSDG-UHFFFAOYSA-N 0.000 claims description 6
- 239000010941 cobalt Substances 0.000 claims description 5
- 229910017052 cobalt Inorganic materials 0.000 claims description 5
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 5
- 150000002576 ketones Chemical group 0.000 claims description 5
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 5
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 4
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 claims description 4
- 235000002906 tartaric acid Nutrition 0.000 claims description 4
- 239000011975 tartaric acid Substances 0.000 claims description 4
- NCYNKWQXFADUOZ-UHFFFAOYSA-N 1,1-dioxo-2,1$l^{6}-benzoxathiol-3-one Chemical group C1=CC=C2C(=O)OS(=O)(=O)C2=C1 NCYNKWQXFADUOZ-UHFFFAOYSA-N 0.000 claims description 3
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical class OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 claims description 3
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 claims description 3
- 150000001408 amides Chemical class 0.000 claims description 3
- 150000003951 lactams Chemical class 0.000 claims description 3
- 150000002815 nickel Chemical class 0.000 claims description 3
- 235000005985 organic acids Nutrition 0.000 claims description 3
- 230000035945 sensitivity Effects 0.000 claims description 3
- UIIMBOGNXHQVGW-UHFFFAOYSA-M sodium bicarbonate Substances [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 3
- HGBOYTHUEUWSSQ-UHFFFAOYSA-N valeric aldehyde Natural products CCCCC=O HGBOYTHUEUWSSQ-UHFFFAOYSA-N 0.000 claims description 3
- RTBFRGCFXZNCOE-UHFFFAOYSA-N 1-methylsulfonylpiperidin-4-one Chemical compound CS(=O)(=O)N1CCC(=O)CC1 RTBFRGCFXZNCOE-UHFFFAOYSA-N 0.000 claims description 2
- 150000001242 acetic acid derivatives Chemical class 0.000 claims description 2
- JFCQEDHGNNZCLN-UHFFFAOYSA-N anhydrous glutaric acid Natural products OC(=O)CCCC(O)=O JFCQEDHGNNZCLN-UHFFFAOYSA-N 0.000 claims description 2
- 235000009582 asparagine Nutrition 0.000 claims description 2
- 150000001508 asparagines Chemical class 0.000 claims description 2
- 235000013922 glutamic acid Nutrition 0.000 claims description 2
- 239000004220 glutamic acid Substances 0.000 claims description 2
- 150000002307 glutamic acids Chemical class 0.000 claims description 2
- 150000002823 nitrates Chemical class 0.000 claims description 2
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 2
- 235000017557 sodium bicarbonate Nutrition 0.000 claims description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 2
- 150000003467 sulfuric acid derivatives Chemical class 0.000 claims description 2
- 230000002829 reductive effect Effects 0.000 claims 5
- 150000001735 carboxylic acids Chemical class 0.000 claims 3
- 150000003841 chloride salts Chemical class 0.000 claims 2
- ARCGXLSVLAOJQL-UHFFFAOYSA-N trimellitic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C(C(O)=O)=C1 ARCGXLSVLAOJQL-UHFFFAOYSA-N 0.000 claims 2
- 150000004649 carbonic acid derivatives Chemical class 0.000 claims 1
- 239000000243 solution Substances 0.000 description 22
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 19
- 238000006243 chemical reaction Methods 0.000 description 15
- 235000010265 sodium sulphite Nutrition 0.000 description 8
- 239000000126 substance Substances 0.000 description 7
- 150000001868 cobalt Chemical class 0.000 description 6
- 238000004040 coloring Methods 0.000 description 6
- 239000000976 ink Substances 0.000 description 6
- 239000000376 reactant Substances 0.000 description 6
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 description 5
- 239000012047 saturated solution Substances 0.000 description 5
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical class OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 4
- 229940024606 amino acid Drugs 0.000 description 4
- 239000007844 bleaching agent Substances 0.000 description 4
- 239000003638 chemical reducing agent Substances 0.000 description 4
- 238000005242 forging Methods 0.000 description 4
- 239000012286 potassium permanganate Substances 0.000 description 4
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 description 4
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 3
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 3
- 229910002651 NO3 Inorganic materials 0.000 description 3
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 3
- QGUAJWGNOXCYJF-UHFFFAOYSA-N cobalt dinitrate hexahydrate Chemical compound O.O.O.O.O.O.[Co+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O QGUAJWGNOXCYJF-UHFFFAOYSA-N 0.000 description 3
- KJIYBINEQTYQCF-UHFFFAOYSA-N cobalt;hexahydrate Chemical compound O.O.O.O.O.O.[Co] KJIYBINEQTYQCF-UHFFFAOYSA-N 0.000 description 3
- 235000013824 polyphenols Nutrition 0.000 description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- DCXYFEDJOCDNAF-REOHCLBHSA-N L-asparagine Chemical compound OC(=O)[C@@H](N)CC(N)=O DCXYFEDJOCDNAF-REOHCLBHSA-N 0.000 description 2
- WHUUTDBJXJRKMK-VKHMYHEASA-N L-glutamic acid Chemical compound OC(=O)[C@@H](N)CCC(O)=O WHUUTDBJXJRKMK-VKHMYHEASA-N 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 description 2
- 229920002472 Starch Polymers 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 2
- 235000017168 chlorine Nutrition 0.000 description 2
- 150000001805 chlorine compounds Chemical class 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000005470 impregnation Methods 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000004816 latex Substances 0.000 description 2
- 229920000126 latex Polymers 0.000 description 2
- 239000011702 manganese sulphate Substances 0.000 description 2
- 235000007079 manganese sulphate Nutrition 0.000 description 2
- SQQMAOCOWKFBNP-UHFFFAOYSA-L manganese(II) sulfate Chemical compound [Mn+2].[O-]S([O-])(=O)=O SQQMAOCOWKFBNP-UHFFFAOYSA-L 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 235000010755 mineral Nutrition 0.000 description 2
- 239000002985 plastic film Substances 0.000 description 2
- 230000009257 reactivity Effects 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000008107 starch Substances 0.000 description 2
- 235000019698 starch Nutrition 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- OBJOZRVSMLPASY-UHFFFAOYSA-N 8-hydroxypyrene-1,3,6-trisulfonic acid Chemical compound C1=C2C(O)=CC(S(O)(=O)=O)=C(C=C3)C2=C2C3=C(S(O)(=O)=O)C=C(S(O)(=O)=O)C2=C1 OBJOZRVSMLPASY-UHFFFAOYSA-N 0.000 description 1
- 239000005711 Benzoic acid Substances 0.000 description 1
- 238000006418 Brown reaction Methods 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 229910021586 Nickel(II) chloride Inorganic materials 0.000 description 1
- IKGXIBQEEMLURG-UHFFFAOYSA-N Rutin Chemical compound OC1C(O)C(O)C(C)OC1OCC1C(O)C(O)C(O)C(OC=2C(C3=C(O)C=C(O)C=C3OC=2C=2C=C(O)C(O)=CC=2)=O)O1 IKGXIBQEEMLURG-UHFFFAOYSA-N 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- -1 alkalis Substances 0.000 description 1
- 229960001230 asparagine Drugs 0.000 description 1
- 235000010233 benzoic acid Nutrition 0.000 description 1
- 238000004061 bleaching Methods 0.000 description 1
- 239000007853 buffer solution Substances 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 125000002843 carboxylic acid group Chemical group 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 125000001309 chloro group Chemical class Cl* 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 229960002989 glutamic acid Drugs 0.000 description 1
- 125000005843 halogen group Chemical group 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 150000002505 iron Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- QMMRZOWCJAIUJA-UHFFFAOYSA-L nickel dichloride Chemical compound Cl[Ni]Cl QMMRZOWCJAIUJA-UHFFFAOYSA-L 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000033116 oxidation-reduction process Effects 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 229940099427 potassium bisulfite Drugs 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- WQGWDDDVZFFDIG-UHFFFAOYSA-N pyrogallol Chemical class OC1=CC=CC(O)=C1O WQGWDDDVZFFDIG-UHFFFAOYSA-N 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000001632 sodium acetate Substances 0.000 description 1
- 235000017281 sodium acetate Nutrition 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 125000000542 sulfonic acid group Chemical group 0.000 description 1
- 150000003460 sulfonic acids Chemical class 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 150000003628 tricarboxylic acids Chemical class 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/40—Agents facilitating proof of genuineness or preventing fraudulent alteration, e.g. for security paper
- D21H21/44—Latent security elements, i.e. detectable or becoming apparent only by use of special verification or tampering devices or methods
- D21H21/46—Elements suited for chemical verification or impeding chemical tampering, e.g. by use of eradicators
Definitions
- the present invention relates to a falsifiable sheet by chemical agents as well as the safety document obtained and the use of a product as a co-reactant. It relates more particularly to the field of paper safety usable especially for the production of parts of payment or official documents such as checks banking, traveller's checks, accounting ledgers, titles, notarial acts, tickets, and in general all documents for which it is essential to protect against any chemical falsification of writings or seals entered on these said documents.
- the object of the invention is to provide a security sheet containing a salt as a chemical forging agent metallic, the sensitivity of this salt towards agents of falsification being improved, that is to say that the reactions will be more intense than with salt alone or colored reactions will take place when they do not exist, in any case imperceptible with salt alone.
- a further aim is to provide a sheet protected against the greatest number of chemical falsification agents while using as few reagents as possible tampering.
- metal salt a co-reactant chosen in the group formed by certain organic acids or their salts, some derivatives of organic acid, compounds having a function aldehyde reducing agent, the compounds having a reducing function ketone, precursors of carbon dioxide.
- the invention provides a sheet which cannot be forged by agents.
- chemicals comprising at least one means of tampering of which at least one of these means consists of a metal salt associated with a coreagent, characterized by the fact that the coreactive is chosen from the group formed by acids organic as defined in claim 1 or their salts, organic acid derivatives as defined in claim 1, the compounds having a reducing function aldehyde, the compounds having a ketone reducing function, carbon dioxide precursors, being excluded from this groups the compounds comprising a phenolic structure.
- the metal salt is chosen from the salts of cobalt II or III, nickel salts or their mixtures.
- metallic salts they can in particular be chosen among chlorides, sulfates, acetates, nitrates, these salts being anhydrous or hydrated.
- amino acids or sulfonic acids have at least two acid groups. These groupings can be identical, for example the acid cannot contain only carboxylic groups, only sulfonic groups.
- the acid can have both carboxylic groups and sulfonic (s).
- the carboxylic acid is chosen from the group formed by tartaric acid, phthalic acid, acid citric, malonic acid, tricarballylic acid, acid trimelittic.
- the organic acid derivatives are chosen from amides, lactams, anhydrides or even acid chlorides.
- the anhydrides can be of the purely carboxylic or purely sulfonic type or of the mixed type, for example of the sulfocarboxylic type, formed between the carboxylic and sulfonic acid groups.
- the anhydride is of the sulfocarboxylic type, in particular it is 2-sulfo-benzoic anhydride.
- the organic acid can be chosen from amino acids, and more particularly among glutamic acids or asparagines.
- butyraldehyde Preferably used as a compound having a function aldehyde reducing agent, butyraldehyde.
- the carbon dioxide precursor is a carbonate or bicarbonate, such as carbonate or sodium bicarbonate.
- the unforgeable sheet is a paper of purely cellulosic fibrous composition, in part synthetic or possibly purely synthetic.
- Leaf may still be a plastic film, possibly coated.
- the composition of the sheet may contain agents classics used in stationery such as fillers minerals, binders, various resistance agents, bonding products, shading dyes.
- the chemical falsification reagents according to the invention can be added en masse to the composition of the sheet or placed on at least one face of the sheet by impregnation or by coating.
- reagents that are soluble in water or in non-or very weakly toxic solvents or in their mixtures are used, these reagents being applied to the sheet by impregnation using a size press.
- the sheet can also include physical authentication elements such as watermarks, plates, threads or special fibers.
- the sheet is printable by any means of printing and is suitable for writing, in particular with an ink pen or with a ballpoint pen.
- the invention also relates to the security document obtained from of the unforgeable sheet described above as well as the use as defined in claims 11 and 12.
- the wet recovery of the solution is approximately 40 g per 100 g of paper.
- Example 1 To 100 g of the solution of Example 1, 2 g of an organic acid which is malonic acid is added. The sheet is treated as in Example 1.
- the reactivity of the sheets obtained according to these examples is tested comparatively by using a saturated sodium sulfite solution as a falsifying agent.
- a saturated sodium sulfite solution as a falsifying agent.
- an orange coloration is obtained which is more intense than that obtained for example 1.
- Malonic acid therefore participated in the colored reaction between the cobalt salt and the falsifying agent.
- Example 2 A solution is made as in Example 2, but the acid used is a mineral acid, sulfuric acid.
- the colored reaction under the action of a saturated sulfite solution is not more intense than in Example 1.
- Aqueous solutions are produced as in Example 2, the organic acid being a dicarboxylic acid chosen from glutaric acid, citric acid, phthalic acid or tartaric acid, the amount of acid varying between 0 , 5 and 2.5 g per 100 g of the bath of Example 1.
- Example 2 A solution is made as in Example 2, but the cobalt salt is replaced by nickel chloride.
- the co-reactant of the cobalt salt is an amino acid, either L-glutamic acid which has two carboxyl groups, or L-asparagine which has only one carboxyl group.
- L-glutamic acid which has two carboxyl groups
- L-asparagine which has only one carboxyl group.
- Example 2 A solution is produced as in Example 2, but cobalt salt, tricarboxylic acid derived from propane, called tricarballylic acid, is used as co-reactant.
- cobalt salt tricarboxylic acid derived from propane, called tricarballylic acid.
- the potassium permanganate / sodium bisulfite redox couple is applied, there is also an orange coloring, while in the case of Example 1 (case of the cobalt salt alone) there is no clearly visible colored reaction. .
- Example 2 A solution is made as in Example 2, but the acid used is benzoic acid 1,2,4 tricarboxylic called trimelittic acid.
- the acid used is benzoic acid 1,2,4 tricarboxylic called trimelittic acid.
- trimelittic acid we treat a paper as in Example 2. The paper is tested with a saturated sodium sulfite solution, it develops an orange coloring.
- Example 2 To 100 g of the solution of Example 1, 1.45 g of 2-sulfo-benzoic anhydride (mixed anhydride formed between the carboxylic and sulfonic groups) is added. We impregnate a sheet and dry it. The leaf obtained is tested with a saturated sodium sulfite solution, an intense orange reaction develops.
- 2-sulfo-benzoic anhydride mixed anhydride formed between the carboxylic and sulfonic groups
- a plastic sheet is coated with this composition, the quantity deposited dry being 10 g / m 2 .
- the sheet Under the action of a saturated solution of sodium sulfite it develops an orange coloring. Under the action of the potassium permanganate / sodium bisulfite couple, a greenish-brown reaction develops.
- Example 2 To 100 g of the solution of Example 1, 1.7 g of tartaric acid and 1 g of manganese sulphate are added (manganese sulphate is a forging agent known for its reactivity with bleach).
- manganese sulphate is a forging agent known for its reactivity with bleach.
- sulfite Under the action of sulfite, an intense orange color is obtained, bisulfite an orange color, bleach a brown color, sodium hydroxide a brown color, an ink eraser pencil, an orange color , CORECTOR ink a pink to orange halo.
Landscapes
- Inks, Pencil-Leads, Or Crayons (AREA)
- Paper (AREA)
Description
Par rapport à l'emploi d'un sel de cobalt seul, le coréactant réducteur de type phénolique permet d'obtenir une réaction colorée plus intense avec les couples d'infalsification oxydo-réducteurs dans les conditions de tests préconisées dans le domaine des papiers infalsifiables cependant la coloration n'est pas améliorée pour les autres agents d'infalsification notamment pour les solutions de sulfite de sodium.
Selon un cas particulier de l'invention, l'anhydride est de type sulfocarboxylique, en particulier c'est l'anhydride 2-sulfo-benzoique.
De préférence on utilise des réactifs solubles dans l'eau ou dans des solvants non ou très faiblement toxiques ou dans leurs mélanges, ces réactifs étant apportés sur la feuille par imprégnation à l'aide d'une presse encolleuse.
La feuille est imprimable par tout moyen d'impression et est apte à l'écriture, notamment avec un stylo à encre ou avec un stylo à bille.
- 15 g de nitrate de cobalt hexahydraté,
- 150 g d'amidon
On traite la feuille comme dans l'exemple 1.
L'acide malonique a donc participé à la réaction colorée entre le sel de cobalt et l'agent de falsification.
La réaction colorée sous l'action d'une solution de sulfite saturée n'est pas plus intense que dans l'exemple 1.
On imprègne des papiers avec ces différentes solutions. On sèche.
On teste les feuilles traitées avec une solution saturée de sulfite de sodium. Dans chaque cas, une coloration orange se développe, l'intensité de la couleur étant nettement supérieure à celle obtenue pour l'exemple 1.
On traite un papier comme dans l'exemple 2.
Sous l'action d'une solution de sulfite saturée il se développe une coloration rose intense.
Si on imprègne le papier avec une solution ne contenant pas d'acide malonique, il ne se développe aucune coloration sous l'action du sulfite.
On imprègne des feuilles de papier avec ces différentes solutions; on sèche.
Sous l'action d'une solution saturée de sulfite de sodium il se développe une coloration jaune intense, quelque soit l'acide aminé.
On traite un papier comme dans l'exemple 2.
On applique une solution saturée de sulfite de sodium; il se développe une coloration orangée plus intense que dans l'exemple 1.
On applique le couple oxydo-réducteur permanganate de potassium / bisulfite de sodium, il se développe également une coloration orangée alors que dans le cas de l'exemple 1 (cas du sel de cobalt seul) il n'y pas de réaction colorée bien visible.
On traite un papier comme dans l'exemple 2.
On teste le papier avec une solution de sulfite de sodium saturée, il se développe une coloration orangée.
On en imprègne une feuille et on la sèche.
On teste la feuille obtenue avec une solution de sulfite de sodium saturée, il se développe une réaction orangée intense.
- 1,25% de nitrate de cobalt hexahydraté,
- 0,1% de butyraldéhyde,
- 10% d'acétate de sodium (solution tampon).
Sous l'action du couple permanganate de potassium / bisulfite de sodium, il se développe une réaction orangée.
Sous l'action de l'eau de javel, il se développe une réaction verte.
- 11,4g de nitrate de cobalt hexahydraté,
- 100 g de carbonate de sodium,
- 15g d'un liant latex
On teste la feuille.
Sous l'action d'une solution saturée de sulfite de sodium il se développe une coloration orangée.
Sous l'action du couple permanganate de potassium / bisulfite de sodium il se développe une réaction brun-verdâtre.
On traite un papier comme dans l'exemple 2.
Sous l'action du sulfite on obtient une coloration orangée intense, du bisulfite une coloration orange, de l'eau de javel une coloration marron, de l'hydroxyde de sodium une coloration marron, d'un crayon effaceur d'encre une coloration orangée, du CORECTOR encre une auréole rose à orangée.
Claims (12)
- Feuille infalsifiable par agents chimiques comprenant au moins un moyen d'infalsification dont l'un au moins de ces moyens est constitué par un sel métallique associé à un coréactif, caractérisée par le fait que le coréactif est un composé choisi parmi ceux du groupe formé par :les acides organiques choisis parmi les acides carboxyliques comportant au moins deux groupements acides, les acides sulfoniques, les acides aminés ainsi que les sels de ces acides,les dérivés d'acide organique choisis parmi les amides, les lactames, les anhydrides, les chlorures d'acide,les composés ayant une fonction réductrice aldéhyde,les composés ayant une fonction réductrice cétone,les précurseurs de dioxyde de carbone,étant exclus de ce groupe, les composés comprenant une structure phénolique.
- Feuille selon la revendication 1, caractérisée par le fait que le sel métallique est choisi parmi les sels de cobalt II ou III, les sels de nickel ou leurs mélanges.
- Feuille selon l'une des revendications 1 à 2, caractérisée par le fait que les sels métalliques sont choisis parmi les nitrates, les chlorures, les sulfates, les acétates, ces sels étant anhydres ou hydratés.
- Feuille selon l'une des revendications 1 à 3, caractérisée par le fait que les acides sulfoniques ou les acides aminés comportent au moins deux groupements acides.
- Feuille selon l'une des revendications 1 à 3, caractérisée par le fait que les acides carboxyliques sont choisis dans le groupe formé par l'acide malonique, l'acide glutarique, l'acide phtalique, l'acide citrique, l'acide tartrique, l'acide tricarballylique, l'acide trimélittique.
- Feuille selon l'une des revendications 1 à 3, caractérisée par le fait que l'anhydride est l'anhydride 2-sulfo-benzoique.
- Feuille selon l'une des revendications 1 à 4, caractérisée par le fait que les acides aminés sont choisis parmi les acides glutamiques ou les asparagines.
- Feuille selon l'une des revendications 1 à 3, caractérisée par le fait que le composé ayant une fonction réductrice aldéhyde est le butyraldéhyde.
- Feuille selon l'une des revendications 1 à 3, caractérisée par le fait que les précurseurs de dioxyde de carbone sont des carbonates ou des bicarbonates, notamment le carbonate ou le bicarbonate de sodium.
- Document infalsifiable caractérisé par le fait qu'il est obtenu à partir d'une feuille selon l'une des revendications précédentes.
- Utilisation, comme coréactif destiné à améliorer la sensibilité d'un sel métallique utilisé comme agent d'infaslsification d'une feuille, d'un produit choisi dans la famille constituée :des acides organiques, choisis parmi les acides carboxyliques comportant au moins deux groupements acides, les acides sulfoniques, les acides aminés, ainsi que de leurs sels,des dérivés d'acide organique choisis parmi les amides, les lactames, les anhydrides, les chlorures d'acide,des composés ayant une fonction réductrice aldéhyde,des composés ayant une fonction réductrice cétone,des précurseurs de dioxyde de carbone,étant exclus de ce groupe, les composés comprenant une structure phénolique.
- Utilisation selon la revendication 11, caractérisée en ce que le sel métallique est un sel de colbalt II ou III ou un sel de nickel ou un mélange de ces sels.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9307885 | 1993-06-29 | ||
FR9307885A FR2694772B1 (fr) | 1992-07-15 | 1993-06-29 | Feuille infalsifiable par agent chimique et document de securite obtenu. |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0632162A1 EP0632162A1 (fr) | 1995-01-04 |
EP0632162B1 true EP0632162B1 (fr) | 1999-12-08 |
Family
ID=9448659
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94400090A Expired - Lifetime EP0632162B1 (fr) | 1993-06-29 | 1994-01-14 | Feuille infalsifiable par agents chimiques et document infalsifiable obtenu |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0632162B1 (fr) |
DE (1) | DE69421965T2 (fr) |
ES (1) | ES2142386T3 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU6697198A (en) * | 1997-03-14 | 1998-10-12 | Georgia-Pacific Corporation | Security paper |
FR2970716B1 (fr) | 2011-01-25 | 2013-09-06 | Honnorat Rech S & Services | Papier de securite infalsifiable aux solvants |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0378029A2 (fr) * | 1988-12-07 | 1990-07-18 | Aussedat-Rey | Papier de sécurité infalsifiable, non fluorescent et document obtenu |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE635442C (de) * | 1934-03-21 | 1936-09-17 | Papierfabrik Spechthausen Akt | Verfahren zur Herstellung von Sicherheitspapier |
FR2693749A1 (fr) * | 1992-07-15 | 1994-01-21 | Arjo Wiggins Sa | Feuille infalsifiable par agent chimique et document de sécurité obtenu. |
-
1994
- 1994-01-14 DE DE1994621965 patent/DE69421965T2/de not_active Expired - Lifetime
- 1994-01-14 ES ES94400090T patent/ES2142386T3/es not_active Expired - Lifetime
- 1994-01-14 EP EP94400090A patent/EP0632162B1/fr not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0378029A2 (fr) * | 1988-12-07 | 1990-07-18 | Aussedat-Rey | Papier de sécurité infalsifiable, non fluorescent et document obtenu |
Also Published As
Publication number | Publication date |
---|---|
EP0632162A1 (fr) | 1995-01-04 |
DE69421965T2 (de) | 2000-06-29 |
ES2142386T3 (es) | 2000-04-16 |
DE69421965D1 (de) | 2000-01-13 |
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