Teroson Gmbh

Terason Gmbh

Heinz A Tomaschek

Karl Reich

Heinz Sieger

Georg Busch

Adhesive composition consisting of .alpha.-cyanoacrylate, one or more sulphonic acid derivatives as stabilizers and conventional additives. The stabilizers are sulphonic acid derivatives having the general formula ##STR1## in which R.sup.1 is a trimethylsilyl group, R.sup.2 a halogen atom, an alkyl group, a perfluoroalkyl group, a cycloalkyl group or an aryl group or R.sup.1 and R.sup.2 together, accompanied by cyclization, represent a group of the general formula ##STR2## in which Z is a substituted or unsubstituted phenylene radical. Preferred are combinations of compounds in which in one R.sup.1 is a trimethylsilyl group and in the other R.sup.1 and R.sup.2 form the aforementioned ring group. (Dihydroxy)-organylboranes and bis(dihydroxyboryl)-derivatives can be used as costabilizers. The storage stability obtained with the stabilizers according to the invention is excellent, without impairing the setting rate and the strength of the bonds obtained.

Cyanoacrylate adhesive composition

A rapid setting .alpha.-cyanoacrylate based adhesive composition having an improved polymerization catalyst therein. The polymerization catalyst is composed of at least one 2 arm pod and compound of the general formula ##STR1##

A rapid setting .alpha.-cyanoacrylate based adhesive composition having an improved polymerization catalyst therein. The polymerization catalyst is composed of at least one 3-arm or at least one 4-arm podand compound or mixtures thereof of the general formula: ##STR1##

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Heidelberg, Germany

Heinz A Tomaschek