Abstract
The authors made experiments to see the influense of higher aliphatic amines (lauryl amine, stearyl amine, their acetates, stearyl trimethyl ammonium chloride) used for vulcanisation of natural rubber on the vulcanization reaction, physical properties and aging of the vulcanisates. Higher aliphatic amines, when added as vulcanization acceleator, accelerate vulcanization remarkably and raise both tensile strength and hardness. This accelerating effect rises in the following order : lauryl amine acetate, stearyl amine acetate lauryl amine, stearyl amine, stearyl trimethyl ammonium chloride. Higher aliphatic amine can be used by itself as vulcanization accelerator, but has a tendency to over-vulcanize quickly, making the vulcanization time shorter. Aging is also accelerated, probably the later part of vulcanization being a factor of the ageing, as can be supposed from reactivity of_higher aliphatic amine. Higher aliphatic amine can be used effectively as dispersing agent or releasing agent. It is considered possible to use these amines with good result in the form of their derivatives and, when compounded as should be, chemical for rubber industry.
