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Viktor Alexandrovich Zimnukhov

Vladimir Vasilievich Kosovtsev

Vladimir Vasilievich Moiseev

Galina Prokofievna Kolesnikova

Valentina Ivanovna Guseva

Ljudmila Vladimirovna Masagutova

Esfir Abramovna Kimel

Alexandr Nikolaevich Polukhin

Lidia Alexeevna Miroshnikova

Tamara Ivanovna Esina

Edit Konstantinovna Chefranova

Novel phenolamine resins which are condensation products of hexamethylene tetramine with a phenol component such as an alkylphenol with 5 to 12 carbon atoms in the alkyl radical, styrene-alkylated phenol, cumylphenol, diphenylolpropane, hydroxybenzoic acid. The condensation reaction is conducted at a temperature ranging from 90.degree. to 180.degree. C. The products thus prepared are efficient stabilizing agents for rubbers and vulcanizates.

Method of preparing phenolamine resins

A method of stabilization of rubbers and vulcanizates thereof which involves incorporation, into a rubber, its solution or latex, of antioxidants, viz. phenolamine resins prepared by condensation of hexamethylene tetramine with alkyl-, alkenynyl-, dialkyl-, arylalkyl-, halo-substituted phenol, dihydroxydiphenylalkanes, hydroxybenzoic acids. Said resins may be used in a combination with conventional antioxidants such as secondary amines, diamines, 2,6-dialkylderivatives of phenol, phosphorus- and sulphur-containing compounds. Said phenolamine resins are considerably superior over conventional antioxidants in their efficiency against thermal ageing during thermomechanical processing.

Method of stabilization of rubbers and vulcanizates

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Viktor Alexandrovich Zimnukhov