Struktol 40 MS Mixture of aromatic hydrocarbon resins Struktol Plasticizers HOMOGENIZING AGENTS RESIN PLASTICIZERS Mixture of dark aromatic hydrocarbon resins. STRUKTOL ® homogenizing agents improve the homogeneity of elastomers of different polarity and viscosity. They are rapidly absorbed by the polymers during the mixing cycle. A relatively low viscosity mass is quickly achieved into which other compounding ingredients can easily be incorporated. The homogenizing agents are particularly effective with those elastomer blends, which tend to crumble at the beginning of the mixing cycle. The softening viscous resins wet the surface of the crumbs promoting the formation of a compact mass. The reduction of compound viscosity and "nerve" achieved with STRUKTOL ® homogenizing agents assist further processing. For instance, bagging tendency can be reduced, extrusion rates are increased without increasing the die swell, and calendering properties are improved. These benefits are retained even after long storage periods of the green compounds. STRUKTOL ® homogenizing agents increase the green tack of many compounds although strictly they are not tackifiers. They do, however, boost the efficiency of other tackifying agents. STRUKTOL ® homogenizing agents do not harden during vulcanization. The hardness of the vulcanizate is not reduced as much as when using, for example, mineral oil plasticizers. Because of their color, STRUKTOL ® 40 MS is not suitable for light colored compounds. Staining may occur under certain conditions. In most cases, the homogenizing agents are added to the polymers within the mixing cycle. STRUKTOL ® 40 MS have good solubility in aromatic and chlorinated hydrocarbons. 4 - 15 phr Mixture of dark aromatic hydrocarbon resins. Used as a homogenizing agent. Improves homogeneity of elastomers of different polarity and viscosity. Reduces compound viscosity and "nerve". Increases green tack. Can not be used for light colored compounds. Use level: 4 - 15 phr.