Acrylic resin composition and moldings in which said composition is used

Abstract

Provided are an acrylic resin composition with which the peeling properties are improved when multi-layer sheets are formed and roll attachment is reduced, and an acrylic/polycarbonate multi-layer sheet having good environmental resistance and good producibility in which said composition is used. A terminally-modified polycarbonate resin (0.1 to 10 wt %) having terminal groups which can be represented by general formula (1): (where R 1 represents an alkylene group, R 2 to R 8 represent hydrogen, an alkyl group, aryl group or the like, and a is an integer from 1 to 1000) is compounded with an acrylic resin to produce the acrylic resin composition, and this is molded into a multi-layer sheet by co-extrusion with polycarbonate resin.

1 . An acrylic resin composition which comprises an acrylic resin as a main component and a terminally-modified polycarbonate resin having terminal groups represented by the following general formula (1): 
       
         
           
           
               
               
           
         
       
       (In the formula (1), R 1  represents an alkylene group having 1 to 20 carbon atoms and R 2  to R 6  represent hydrogen, an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 12 carbon atoms or an alkenyl group having 2 to 10 carbon atoms. R 7  and R 8  represent hydrogen, fluorine, chlorine, bromine, iodine, an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 12 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, an alkoxy group having 1 to 5 carbon atoms or an aralkyl group having 7 to 17 carbon atoms. “a” is an integer from 1 to 1000.) 
     
     
         2 . The acrylic resin composition according to  claim 1 , wherein the content of said terminally-modified carbonate resin is 0.1 to 10% by weight. 
     
     
         3 . The acrylic resin composition according to  claim 1 , wherein said terminally-modified carbonate resin has the intrinsic viscosity of 0.05 to 1.5 dl/g. 
     
     
         4 . The acrylic resin composition according to  claim 1 , wherein R 2  to R 6  in said general formula (1) is hydrogen, a methyl group, a butyl group or a phenyl group. 
     
     
         5 . The acrylic resin composition according to  claim 1 , wherein R 1  in said general formula (1) is an alkylene group having 1 to 6 carbon atoms. 
     
     
         6 . The acrylic resin composition according to  claim 1 , wherein “a” in said general formula (1) is from 4 to 100. 
     
     
         7 . The acrylic resin composition according to  claim 1 , wherein said terminally-modified polycarbonate resin has repeating units represented by the following general formula (2): 
       
         
           
           
               
               
           
         
       
       (In the formula (2), R 9  to R 12  represent hydrogen, fluorine, chlorine, bromine, iodine, an alkyl group having 1 to 9 carbon atoms, an aryl group having 6 to 12 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms or an aralkyl group having 7 to 17 carbon atoms. “X” represents a group selected from the group consisting of divalent organic groups represented by the following formulas: 
       
         
           
           
               
               
           
         
       
       (In the above formulas, R 13  and R 14  represent hydrogen, fluorine, chlorine, bromine, iodine, an alkyl group having 1 to 9 carbon atoms, an alkoxy group having 1 to 5 carbon atoms or an aryl group having 6 to 12 carbon atoms, or a group forming a carbon ring or a heterocycle wherein R 13  and R 14  are bonded with each other. R 15  to R 18  represent hydrogen, an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 12 carbon atoms or an alkenyl group having 2 to 10 carbon atoms. R 19  and R 20  represent an alkylene group having 1 to 20 carbon atoms. “b” is an integer from 0 to 20. “c” is an integer from 1 to 1000.) 
     
     
         8 . The acrylic resin composition according to  claim 7 , wherein said repeating units represented by the general formula (2) are derived from 2,2-bis(4-hydroxyphenyl)propane, 1,1-bis(4-hydroxyphenyl)cyclohexane, 2,2-bis(4-hydroxy-3-methylphenyl)propane, bis(4-hydroxyphenyl)methane, 4,4′-biphenyldiol or α,ω-bis[3-(o-hydroxyphenyl)propyl]polydimethylsiloxane. 
     
     
         9 . The acrylic resin composition according to  claim 7 , wherein the average degree of polymerization of said repeating units represented by the general formula (2) is 7 to 200. 
     
     
         10 . The acrylic resin composition according to  claim 1 , wherein said acrylic resin is derived from monomers comprising an acrylic monomer selected from the group consisting of acrylic acids, acrylates and methacrylates as a main component. 
     
     
         11 . The acrylic resin composition according to  claim 10 , wherein said acrylic resin is polymethylmethacrylate copolymer. 
     
     
         12 . The acrylic resin composition according to  claim 1 , which further comprises fatty acid amides and/or higher alcohols. 
     
     
         13 . A molded product obtained by molding the acrylic resin composition according to  claim 1 . 
     
     
         14 . The molded product according to  claim 13 , which is a film or sheet molded product. 
     
     
         15 . A multilayer laminated product which at least comprises a layer formed of the acrylic resin composition according to  claim 1  and a layer formed of other resins. 
     
     
         16 . The multilayer laminated product according to  claim 15 , which is a polycarbonate resin laminated product wherein a polycarbonate resin is used as said other resins and said layer formed of the acrylic resin composition is laminated on one side or both sides of the layer formed of the polycarbonate resin. 
     
     
         17 . The multilayer laminated product according to  claim 15 , which further comprises a hardcoat layer. 
     
     
         18 . A process for producing the acrylic resin composition according to  claim 1 , which comprises a process of mixing acrylic monomers with a terminally-modified polycarbonate resin having terminal groups represented by the following general formula (1) and subsequently polymerizing said acrylic monomers by heat or light. 
       
         
           
           
               
               
           
         
       
       (In the formula (1), R 1  represents an alkylene group having 1 to 20 carbon atoms and R 2  to R 6  represent hydrogen, an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 12 carbon atoms or an alkenyl group having 2 to 10 carbon atoms. R 7  and R 8  represent hydrogen, fluorine, chlorine, bromine, iodine, an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 12 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, an alkoxy group having 1 to 5 carbon atoms or an aralkyl group having 7 to 17 carbon atoms. “a” is an integer from 1 to 1000.) 
     
     
         19 . A process for producing a multilayer laminated product comprising a layer formed of the acrylic resin composition according to  claim 1  and a layer formed of other resins, which comprises a step of molding by co-extrusion of a resin forming said layer formed of other resins with said acrylic resin composition. 
     
     
         20 . A process for producing a multilayer laminated product comprising a layer formed of the acrylic resin composition according to  claim 1  and a layer formed of other resins, which comprises a step of coating a mixture of acrylic monomers and a terminally-modified polycarbonate resin having terminal groups represented by the following general formula (1) on said layer formed of other resins and subsequently polymerizing acrylic monomers in said mixture by heat or light. 
       
         
           
           
               
               
           
         
       
       (In the formula (1), R 1  represents an alkylene group having 1 to 20 carbon atoms and R 2  to R 6  represent hydrogen, an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 12 carbon atoms or an alkenyl group having 2 to 10 carbon atoms. R 7  and R 8  represent hydrogen, fluorine, chlorine, bromine, iodine, an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 12 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, an alkoxy group having 1 to 5 carbon atoms or an aralkyl group having 7 to 17 carbon atoms. “a” is an integer from 1 to 1000.)