Polymeric material, containing a latent acid

Abstract

Polymeric material, containing a latent acid which can be converted to an acid by irradiation by a laser and optionally further ingredients.

1 . Polymeric material, containing a latent acid, which can be converted to an acid by irradiation by a laser, and optionally further ingredients.  
     
     
         2 . Polymeric material according to  claim 1 , wherein the latent acid is of formula  
       
         
           
           
               
               
           
         
       
       wherein 
 the ring A can contain one or more hetero atoms and/or can contain an anelated ring, R 1  is hydrogen, alkyl, alkenyl, aryl,  
 R 2 , R 3 , R4 and R 5  independently of each other are hydrogen or a functional substituent, and  
 R stands for C 1 -C 6 alkyl, —Z 1 —Q 1 , or —Z 2 —Q 2 ,  
 wherein Z 1  is a single bond, S, NH or O and Q 1  is a heterocyclic ring system having from 5 to 9 ring atoms selected from C, S, O and N, with at least 2 carbon atoms in the ring system, which may be substituted one to three times with C 1 -C 4 alkyl or hydroxy, mercaptobenzoxazole, mercaptobenzthiazole,  
 and wherein Z 2  stands for C 1 -C 4 alkylene, which can be substituted by C 1 -C 4 alkyl or Q3, wherein Q 3  stands for phenyl which can be substituted one to three times with C 1 -C 4 alkyl, hydroxy, C 5 -C 8 cycloalkyl and/or a heterocyclic ring system having from 5 to 9 ring atoms selected from C, S, O and N, with at least 2 carbon atoms in the ring system, and Q 2  stands for phenyl which can be substituted one to three times with C 1 -C 4 alkyl, hydroxy, C 5 -C 8 cycloalkyl and/or a heterocyclic ring system having from 5 to 9 ring atoms selected from C, S, O and N, with at least 2 carbon atoms in the ring system, with the proviso that the hydrogen atom at the C-atom in a-position to R can be split off by irradiation.  
 
     
     
         3 . Polymeric material according to  claim 1 , wherein the polymeric material contains 0.001 to 10% by weight by weight of the latent acid.  
     
     
         4 . Polymeric material according to  claim 1 , wherein the polymeric material contains as further ingredient a stabilizer, an antioxidant or a softener.  
     
     
         5 . Process for converting the polymeric material containing a latent acid according to  claim 1  into polymeric material containing an acid, characterized in that the polymeric material containing a latent acid is irradiated with UV-light.  
     
     
         6 . Process according to  claim 5 , wherein irradiation is performed with a UV-laser using UV-light of 285 to 400 nm.  
     
     
         7 . Polymeric material obtained by a process according to  claim 5.