×

Two-layer system

  • US 4,914,004 A
  • Filed: 08/28/1987
  • Issued: 04/03/1990
  • Est. Priority Date: 08/30/1986
  • Status: Expired due to Fees
First Claim
Patent Images

1. In a radiation-curable two-layer system comprising a layer containing polymerization photoinitiator and applied to a substrate, and a second layer containing photopolymerizable compounds superposed on said first layer, the improvement wherein said photoinitiator is immobilized on a macrostructure and attached to a polymer matrix by a covalent bond and wherein said photoinitiator is of the formulaAr--CO--RwhereinAr is ##STR3## R is Ar or CR2 R3 R4, R1 is H, halogen, C1 -C12 -alkyl, C1 -C12 -alkoxy, C1 -C12 -alkylthio or A,R2 and R3 independently of one another are each H, C1 -C6 -alkyl or phenyl, or one of R2 and R3 is C1 -C6 -alkylene-O-A, or R2 and R3 together are C2 -C6 -alkylene or C1 -C6 -oxaalkylene,R4 is OR5, N(R5)2, SR5, or A,R5 is H, C1 -C6 -alkyl or C1 -C6 -alkanoyl,A is ##STR4## X is O, NH OR (C1 -C6 -alkyl)--N, Y is O, N or S,Z is in each case independently of one another H or CH3,m is 0 to 4 andn is 2 to 106,subject to the proviso that said initiator contains at least one radical of the formula A.

View all claims
  • 3 Assignments
Timeline View
Assignment View
    ×
    ×