UV-vernetzbare Acrylathaftschmelzhaftkleber mit enger Molekulargewichtsverteilung

摘要

A polyacrylate adhesive composition (I) has an average mol. wt. (Mw) of 100,000-600,000 g/mol, a polydispersity of no greater than 3.0 and contains polymerized photoinitiator units. Independent claims are included for: (i) a process for the production of UV-cross-linkable polyacrylate adhesive compositions (I) by a radical polymerization process of a monomer mixture comprising copolymerizable photoinitiators whereby the polymerization process is regulated by the presence of at least one chemical compound containing the -S-C=X unit where X is S, O or N; and (ii) a process for the production of acrylate adhesive compositions (I) whereby the monomer mixture comprises 68-99.9 (75-99.5) wt.% acrylic acid ester or methacrylic acid ester and/or their free acids of formula (1) and 0.05-2 (0.4-1) wt.% of a copolymerizable UV photoinitiator having a radically polymerizable double bond. CH2=CH(R1)(COOR2) (1) R1 = H or CH3; R2 = 1-30C alkyl