Method for the production of a polycarbonate laminate

Abstract

The invention relates to the use of a preparation comprising A) 0.1 to 20 wt % of a binding agent with a polycarbonate derivative based on a geminally disubstituted dihydroxydiphenyl cycloalkane, B) 30 to 99.9 wt % of an organic solvent or of a mixture of solvents, C) 0 to 10 wt %, referred to dry mass, of a dye or of a mixture of dyes, D) 0 to 10 wt % of a functional material or of a mixture of functional materials, E) 0 to 30 wt % of additive and/or auxiliary substances, or of a mixture of such substances, the relative amounts of the components A) to E) always totaling 100 wt %, as an ink jet printing dye.

1 . The use of a preparation comprising
 A) 0.1 to 20 wt % of a binding agent with a polycarbonate derivative based on a geminally disubstituted dihydroxydiphenyl cycloalkane,   B) 30 to 99.9 wt % of a solvent or of a mixture of solvents,   C) 0 to 10 wt %, referred to dry mass, of a dye or of a mixture of dyes,   D) 0 to 10 wt % of a functional material or of a mixture of functional materials,   E) 0 to 30 wt % of additive and/or auxiliary substances, or of a mixture of such substances, the relative amounts of the components A) to E) always totaling 100 wt %, as an ink jet printing dye.   
     
     
         2 . The use according to  claim 1 , wherein the polycarbonate derivative has an average molecular weight (mean weight) of at least 10,000, preferably from 20,000 to 300,000. 
     
     
         3 . The use according to  claim 1 , wherein the polycarbonate derivative comprises functional carbonate structure units of formula (I), 
       
         
           
           
               
               
           
         
       
       wherein
 R 1  and R 2  are independently from each other hydrogen, halogen, preferably chlorine or bromine, C 1 -C 8  alkyl, C 5 -C 6  cycloalkyl, C 6 -C 10  aryl, preferably phenyl, and C 7 -C 12  aralkyl, preferably phenyl-C 1 -C 4  alkyl, in particular benzyl, 
 m is an integer from 4 to 7, preferably 4 or 5, 
 R 3  and R 4  can be individually selected for each X, and independently represent hydrogen or C 1 -C 6  alkyl 
 X is carbon and 
 n is an integer greater than 20, 
 with the proviso that at least one atom X, R 3  and R 4  are both alkyl. 
 
     
     
         4 . The use according to  claim 3 , wherein at 1 to 2 atoms X, in particular at only one atom X, R 3  and R 4  are both alkyl. 
     
     
         5 . A method according to  claim 3 , wherein R 3  and R 4  are methyl. 
     
     
         6 . The use according to  claim 3 , wherein the X atoms in the alpha position to the diphenyl-substituted C atom (C1) are not dialkyl-substituted. 
     
     
         7 . The use according to  claim 3 , wherein the X atoms in the beta position to C1 are disubstituted with alkyl. 
     
     
         8 . The use according to  claim 3 , wherein m is 4 or 5. 
     
     
         9 . The use according to  claim 3 , wherein the polycarbonate derivative is based on
 4,4′-(3,3,5-trimethyl cyclohexane-1,1-diyl) diphenol,   4,4′-(3,3-dimethyl cyclohexane-1,1-diyl) diphenol, or   4,4′-(2,4,4-trimethyl cyclopentane-1,1-diyl) diphenol.   
     
     
         10 . The use according to  claim 1 , wherein the polycarbonate derivative comprises a copolymer in particular consisting of monomer units M1 based on formula (Ib), for instance based on bisphenol A, and monomer units M2 based on the geminally disubstituted dihydroxydiphenyl cycloalkane, preferably of the 4,4′-(3,3,5-trimethyl cyclohexane-1,1-diyl) diphenol, wherein the molar ratio M2/M1 preferably is greater than 0.3, in particular greater than 0.4, preferably greater than 0.5. 
     
     
         11 . The use according to  claim 1 , wherein the component B) is halogen-free. 
     
     
         12 . The use according to  claim 1 , wherein the component B) consists of a liquid aliphatic, cycloaliphatic, and/or aromatic hydrocarbon, a liquid organic ester, and/or of a mixture of such substances. 
     
     
         13 . The use according to  claim 12 , wherein the hydrocarbon and/or the organic ester is selected from the group consisting of “mesitylene, 1,2,4-trimethylbenzene, cumene, solvent naphtha, toluene, xylene, methylacetate, ethylacetate, butylacetate, methoxypropylacetate, ethyl-3-ethoxypropionate”. 
     
     
         14 . The use according to  claim 13 , wherein the component B) consists of:
 L1) 0 to 10 wt %, preferably 1 to 5 wt %, in particular 2 to 3 wt %, of mesitylene,   L2) 10 to 50 wt %, preferably 25 to 50 wt %, in particular 30 to 40 wt %, of 1-methoxy-2-propanolacetate,   L3) 0 to 20 wt %, preferably 1 to 20 wt %, in particular 7 to 15 wt %, of 1,2,4-trimethylbenzene,   L4) 10 to 50 wt %, preferably 25 to 50 wt %, in particular 30 to 40 wt %, of ethyl-3-ethoxypropionate,   L5) 0 to 10 wt %, preferably 0.01 to 2 wt %, in particular 0.05 to 0.5 wt %, of cumene, and   L6) 0 to 80 wt %, preferably 1 to 40 wt %, in particular 15 to 25 wt %, of solvent naphtha, the relative amounts of the components L1 to L6 always totaling 100%.   
     
     
         15 . The use according to  claim 1 , wherein the preparation comprises:
 A) 0.1 to 10 wt %, in particular 0.5 to 5 wt %, of a binding agent with a polycarbonate derivative based on a geminally disubstituted dihydroxydiphenyl cycloalkane,   B) 40 to 99.9 wt %, in particular 45 to 99.5 wt %, of an organic solvent or of a mixture of solvents,   C) 0.1 to 6 wt %, in particular 0.5 to 4 wt %, of a dye or of a mixture of dyes,   D) 0.001 to 6 wt %, in particular 0.1 to 4 wt %, of a functional material or of a mixture of functional materials,   E) 0.1 to 30 wt %, in particular 1 to 20 wt %, of additive and/or auxiliary substances, or of a mixture of such substances.   
     
     
         16 . A method for making a structure with at least a first polymer layer and, optionally, a second polymer layer, each made from a polycarbonate polymer based on bisphenol A, wherein on the first polymer layer an ink jet printing layer is arranged, comprising the following steps:
 a) applying the ink jet printing layer from a preparation according to  claim 1  on at least one partial region of the first polymer layer,   b) optionally, drying the ink jet printing layer,   c) optionally after step a) or step b), placing the second polymer layer on the first polymer layer, covering the ink jet printing layer, and laminating the first polymer layer and the second polymer layer with each other under pressure, at a temperature of 120° C. to 230° C. and for a defined time.   
     
     
         17 . The method according to  claim 16 , wherein the temperature in step (c) is in the range from 140° C. to 200° C., in particular in the range from 150° C. to 180° C. 
     
     
         18 . The method according  claim 16 , wherein the first polycarbonate layer and the second polycarbonate layer have a glass temperature Tg of more than 145° C. 
     
     
         19 . The method according to  claim 16 , wherein the thickness of the first polycarbonate layer and of the second polycarbonate layer is up to 1,000 μm, in particular from 20 to 200 μm. 
     
     
         20 . The method according to  claim 16 , wherein the thickness, measured in directions orthogonal to a main face of a polycarbonate layer, of the ink jet printing layer is in the range from 0.01 to 10 μm, in particular from 0.05 to 5 μm. 
     
     
         21 . A structure obtainable with a method according to  claim 16 . 
     
     
         22 . The structure comprising at least a first polycarbonate layer and an ink jet printing layer from of a preparation according to  claim 1  and arranged on the first polycarbonate layer, wherein optionally on the side of the printing layer opposite to the first polycarbonate layer, a second polycarbonate layer may be arranged. 
     
     
         23 . The use of a method according to  claim 16  for making a security and/or value document, wherein optionally simultaneously with, before or after the production of the structure, the first polycarbonate layer and/or the second polycarbonate layer are directly or indirectly connected in a stack with at least one additional layer, for instance a carrier layer. 
     
     
         24 . The security and/or value document obtainable according to  claim 23 . 
     
     
         25 . The security and/or value document comprising a structure according to  claim 21 . 
     
     
         26 . A method for making a structure with at least one polymer layer and an injection-molded part from a polymer material, wherein between the polymer layer and the injection-molded part an ink jet printing layer is arranged, comprising the following steps:
 a) applying, on at least one partial region of the polymer layer, the ink jet printing layer from a preparation according to  claim 1 ,   b) optionally, drying the ink jet printing layer,   c) after step a) or step b), placing the polymer layer in an injection mold, wherein the ink jet printing layer showing toward inside,   d) injecting into the injection mold, the polymer material at a temperature of at least 60° C., and   e) cooling-off the polymer material to a temperature of at least 20° C. below the temperature of step d), and then taking the structure from the injection mold.   
     
     
         27 . The method according to  claim 26 , wherein the temperature in step d) is in the range from 80° C. to 200° C., in particular in the range from 100° C. to 180° C., and/or wherein the temperature in step e) is at least 40° C. below the temperature in step d). 
     
     
         28 . The method according to  claim 26 , wherein the polycarbonate layer has a glass temperature Tg of more than 145° C. 
     
     
         29 . The method according to  claim 26 , wherein the thickness of the polycarbonate layer is in the range from 10 to 1,000 μm, in particular from 20 to 200 μm. 
     
     
         30 . The method according to  claim 26 , wherein the thickness, measured in directions orthogonal to a main face of the polycarbonate layer, of the ink jet printing layer is in the range from 0.01 to 10 μm, in particular from 0.05 to 5 μm. 
     
     
         31 . The structure obtainable with a method according to  claim 26 . 
     
     
         32 . The structure comprising at least one polycarbonate layer and an injection-molded part and an ink jet printing layer from a preparation according to  claim 1  and arranged between the polycarbonate layer and the injection-molded part.