| 摘要 |
Stabilized synthetic rubber compositions contain, as a stabilizing agent, a complexing or chelating agent which is a water-insoluble aliphatic amino acid having a plurality of carboxyalkyl groups attached to tertiary amino nitrogen atoms. The complexing or chelating agent is preferably a compound of the structure <FORM:1024484/C3/1> wherein R is an aliphatic hydrocarbon group of 6-20 carbon atoms, R1 is an alkylene group of 2-10 carbon atoms, x is 0 or 1, y is 1 or 2, and when x is 0, y is 1 and when x is 1, y is 2. The compositions usually contain rubber anti-oxidants in addition to the stabilizing agent. Many suitable synthetic rubbers are specified. Examples are given.ALSO:Compounds of the general formula <FORM:1024484/C2/1> wherein R is an alkyl group containing 8-20 carbon atoms, are prepared by reacting an aliphatic diamine with chloroacetic acid in accordance with the reaction <FORM:1024484/C2/2> Examples are given. |
