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Safety document and/or valuable document with scratch-proof covering layer

A technology for scratch resistance and document application in coating, transportation and packaging, printing, etc., which can solve the problems of high cost, embossing, and inability to maintain clarity, and achieve good scratch resistance and chemical resistance Effect

Inactive Publication Date: 2012-07-04
COVESTRO DEUTSCHLAND AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods comprise at least one additional, expensive method step for applying the scratch-resistant coating
A further disadvantage is that, in the case where the transfer film is not used simultaneously in the lamination of the card, embossing into the surface can occur, and any embossed structures do not retain the desired clarity during the subsequent application of the lacquer layer. Spend

Method used

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  • Safety document and/or valuable document with scratch-proof covering layer
  • Safety document and/or valuable document with scratch-proof covering layer

Examples

Experimental program
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preparation example Construction

[0160] The preparation of these polycarbonates can be carried out in a known manner from diphenols, carbonic acid derivatives, optionally chain terminators and optionally branching agents. Details of polycarbonate preparation have been disclosed in numerous patent documents for about 40 years. By way of example only, Schnell, "Chemistry and Physics of Polycarbonate", Polymer Reviews, Vol. 9, Interscience Publishers, New York, London, Sydney 1964, referenced here by D. Freitag, U. Grigo, P.R. Müller, is mentioned here by reference , H.Nouvertne', BAYER AG, "Polycarbonate" in Encyclopedia of Polymer Science and Engineering, Vol. 11 2nd Edition, 1988, pp. 648-718 and last reference to Drs.U.Grigo, K.Kirchner and P.R.Müller" Polycarbonate" in Becker / Braun, Kunsts-ff-Handbuch, Vol. 3 / 1, Polycarbonate, Polyacetale, Polyester, Celluloseester, Carl Hanser Verlag Munich, Vienna 1992, Vol. 117-299.

[0161] Suitable diphenols may be, for example, dihydroxyaryl compounds of the general ...

Embodiment

[0198] Abbreviations and trade names used:

[0199] HDDA 1,6-Hexanediol diacrylate

[0200] PTTA pentaerythritol tetraacrylate

[0201] TMPTA Trimethylolpropane Triacrylate

[0202] HDI 1,6-Hexamethylene Diisocyanate

[0203] PTTA / HDI Reaction product of PTTA and HDI

[0204] Irgacure ? 184 1-Hydroxy-cyclohexyl phenyl ketone (photoinitiator from Ciba Specialty Chemicals)

[0205] BYK ? 306 Solution of polyether-modified polydimethylsiloxane in a xylene / monophenyl glycol mixture (mixing ratio 7 / 2) with a solids content of 12.5% ​​by weight (wetting aid from BYK Additives & Instruments )

[0206] Components I) to IV) used:

[0207] Component I) HDDA

[0208] Component II) Ethoxylated TMPTA, weight average molecular weight M w is about 500g / mol (measured by GPC, using polystyrene as a standard)

[0209] Component III) PTTA (Examples 1-7 and Comparative Examples 1-4)

[0210] Component IV) TMPTA

Embodiment 1-8() and comparative example 1-4

[0213] Prepare the paint composition:

[0214] According to the compositions described in Tables 1a and 1b, the parts by weight of HDDA were initially introduced into the mixing vessel, 7 parts by weight of the photoinitiator Irgacure ? 184. The mixture was stirred until the photoinitiator was dissolved. Thereafter, the photoinitiator solution was finely filtered (the pore width of the filter is 1 μm). Then the other monomers (TMPTA, ethoxylated TMPTA, PTTA or the reaction product of PTTA and HDI) and another 0.9 parts by weight of BYK ? 306 was added continuously with stirring and the mixture was then stirred for 15 minutes. The lacquer is again subjected to fine filtration (filter pore width 1 μm).

[0215] Table 1a

[0216] components Example 1 Example 2 Comparative example 1 Comparative example 2 Example 3 Example 4 HDDA 1) 19.5 48.8 73.8 11.9 25.3 24.2 TMPTA 1) 33.0 20.7 10.5 36.0 30.4 16.7 Ethoxylated TMPTA 1) 2...

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Abstract

The invention relates to a security and / or valuable document containing a scratch-resistant coating obtained from a lacquer composition comprising I) from 12 to 70 parts by wt. of a C2-C12-diol diacrylate or C2-C12-diol dimethacrylate, II) from 12 to 40 parts by wt. of an alkoxylated mono-, di-, tri-, tetra-, penta- or hexaacrylate or alkoxylated mono-, di-, tri-, tetra-, penta- or hexamethacrylate, III) from 0 to 40 parts by wt. of a monomer selected from the group consisting of pentaerythritol triacrylate, pentaerythritol tetraacrylate, dipentaerythritol tetraacrylate, dipentaerythritol pentaacrylate, dipentaerythritol hexaacrylate, pentaerythritol trimethacrylate, pentaerythritol tetramethacrylate, dipentaerythritol tetramethacrylate, dipentaerythritol pentamethacrylate, dipentaerythritol hexamethacrylate, reaction products thereof with aliphatic or aromatic diisocyanates, and mixtures thereof, IV) from 5 to 60 parts by wt. of a further mono-, di- or triacrylate or mono-, di- or trimethacrylate, and further comprises V) from 0.1 to 10 parts by wt. of a photoinitiator.

Description

[0001] Cross-Referenced Related Applications [0002] This application claims priority to European Patent Application No. 10193719.1 filed 3 December 2010, which is hereby incorporated by reference in its entirety for all useful purposes. Background of the invention [0003] The present invention relates to security and / or valuable documents comprising at least one scratch-resistant coating as a top layer on at least one outer face, to a method for producing the same, to thermoplastic films coated with such a scratch-resistant coating and to Paint compositions for such scratch-resistant coatings. [0004] Security and / or valuable documents, in particular identification documents, such as for example personal identification cards, are usually produced by laminating several different layers, usually in the form of a single film, to form the card, which layers are in the identity Different functions are provided in the card. During the lamination operation, structures with dime...

Claims

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Application Information

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IPC IPC(8): B42D15/00C09D4/02
CPCC08F2222/1053C08F2222/1026C08F222/1006C08F220/20B42D15/0013C09D4/00C08F222/102C08F222/103C08F222/104C08F222/105Y10T156/10Y10T156/1041Y10T428/31935
Inventor J.佩佐尔特M-C.耶西尔达格G.乔瓦拉斯
Owner COVESTRO DEUTSCHLAND AG
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