| abstract |
The present invention relates to the modification of butyl elastomers, in particular halobutyl elastomers, in the presence of alkyl or metal salts of oxygen or sulfur-based nucleophiles, by means of a phase transfer catalyst, in particular tetrabutylammonium bromide or trioctylmethylammonium chloride, under solventless conditions. . Suitable nucleophiles for use in the present invention are metals of tert-butylacetic acid, stearic acid, benzoic acid, 4- (dimethylamino) benzoic acid, anthracene-9-carboxylic acid, linoleic acid or mixtures thereof prepared by neutralization with a suitable hydroxide base. Salts. |