Huels Aktiengesellschaft

Bayer Aktiengesellschaft

Huls Aktiengesellschaft

Bunawerke Huls Gmbh

Gerhard Horpel

Karl-Heinz Nordsiek

Dieter Zerpner

Herbert Knipp

Joachim Pangratz

A tire tread made for polydiene rubber crosslinked with 1,2-bis(N,N-dibenzylthiocarbamoyldisulfido)ethane and method of producing the same.

Tire treads with increased tread life, and method of manufacturing same

Polysulfide derivatives, having the general formula (A--S--S--).sub.2 X--S--S--A processes for their production and their use for crosslinking of reversion-stable rubber vulcanizates are provided. Crosslinking with reduced reversion and loss of elastomeric properties with age is achieved by the crosslinking system provided by the invention.

Polysulfide derivatives

Aromatic hydroxydithiocarboxylic acid vulcanization accelerators for aqueous dispersions of unsaturated polymers are provided which eliminate the formation of health-threatening nitrosamines and do not adversely affect the vulcanization properties.

Process for the vulcanization of latex with aromatic dithiocarboxylic

Polysulfide derivatives having the general formula (A--S--S--).sub.2 X--S--S--A, processes for their production and their use for crosslinking of reversion-stable rubber vulcanizates are provided. Crosslinking with reduced reversion and loss of elastomeric properties with age is achieved by the crosslinking system provided by the invention.

Process for inhibiting and for stopping radical induced polymerizations which employs an aromatic hydroxy dithiocarboxylic acid or salt thereof as stopping agent for deactivating radicals, thereby precluding the formation of carcinogenic nitrosamines.

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Nottuln, Germany

Gerhard Horpel