Luperox Gmbh

Pennwalt Corporation

Kurt Rauer

Chester Stephen Sheppard

Harald Hofmann

Angelika Orner

Heidelinde Schiller

Optionally nucleo-substituted styrene polymers are crosslinked at temperatures above 110.degree. C. with combinations of crosslinkage promoters containing at least two polymerizable C--C double or C--C triple bonds in the molecule, and organic peroxides (with the exception of hydroperoxides, peracids, and ketone peroxides) having a 10 hour halflife temperature below 106.degree. C.

Crosslinking of styrene polymers

A process is provided for crosslinking, foaming, or both of polymers at temperatures above 150.degree. C. using at least one azo ester and/or azo ether in combination with at least one crosslinking intensifier having at least two reactive carbon-carbon double or triple bonds.

Process for crosslinking and, if desired, foaming natural or synthetic

A method is provided for crosslinking polymers at temperatures above 170.degree. C using azo-esters having the formula ##STR1## wherein R.sup.3 is --OOC--R, alkyl, cycloalkyl or aralkyl.

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Guenzburg, Germany

Kurt Rauer