Tesa Se

Helmut Ritter

Stephan Zöllner

Bernd Lühmann

Alexander Prenzel

Benjamin Pütz

End-group-functionalized oligomers with controlled degrees of functionality based on styrene are produced by reacting the monomer with a regulator by means of free-radical polymerization. At least some of the quantity of regulator is added according to a prescribed program so that at every juncture t the value of the quantitative fraction added up to said juncture does not fall short of the value of the respective conversion U(t) in the polymerization reaction at said juncture t by more than 5 percentage points and does not exceed said value U(t) by more than 5 percentage points.

Process for producing short-chain end-group-functionalized macromolecules based on styrene

Crosslinked pressure-sensitive adhesives (PSAs) based on polymers of branched macromolecules each comprising a main chain and one or more sidechains pendent to the main chain, the constitutional units thereof originating from a) X wt % of one or more acrylic and/or methacrylic esters, with 80&#x3c;=X&#x3c;=99.5; b) Y wt % of radically copolymerizable monomers having at least one acid function, with 0.5&#x3c;=Y&#x3c;=15; c) Z wt % of vinyl compounds, with 0&#x3c;=Z&#x3c;=5, at least one sidechain pendent to the main chain having a number-average molar mass &#x3e;=1000 g/mol, and the respective amounts of constitutional units originating from a), b) and c) can be the same in each case or differ by not more than 1%, and where a), b) and c) may in each case be the same or different monomers, have detachment properties which can be set independently of one another.

Growing community of inventors

Munich, Georgia

Helmut Ritter