| abstract |
1448328 Modified bromobutyl rubber POLYSAR Ltd 5 Nov 1974 [8 Nov 1973] 47856/74 Heading C3P Bromobutyl rubber is modified by reaction with any of a number of types of tertiary amines, defined by general formulµ, in an amount of 1/100th to 1/8th chemical equivalent of amine per chemical equivalent of bromine. The product has improved green strength, and may be blended with other rubbers and with conventional compounding ingredients. In examples, the amines used are N,N,N<SP>1</SP>,N<SP>11</SP>,N<SP>111</SP>,N<SP>111</SP>-hexamethyltriethylene tetramine, triethylene diamine, N,N-dimethyl benzylamine, N-methylpiperidine, N,N,N<SP>1</SP>,N<SP>1</SP> - tetramethylhexamethylene diamine, N,N-dimethyldodecylamine, N,N - dimethyloctadecylamine and N,N-dimethylhexylamine. |