Rubber Products Plasticizing Effect Is Good

Rubber processing is the most used one of the plasticizer. Rubber Products Plasticizing effect is good, rich sources, low cost. Petroleum-based plasticizer is to select the appropriate crude oil at atmospheric pressure and vacuum distillation in the system. The main varieties are operating oil, three-line oil, transformer oil, oil, light heavy oil, paraffin, petrolatum, asphalt and petroleum resin, Rubber Products the most commonly used is the operating oil.

The operating oil is a high boiling fraction of petroleum and consists of complex hydrocarbon compounds with a molecular weight of 300 to 600 and a wide molecular weight distribution. Rubber Products According to the main components of oil, the operating oil can be divided into the following three:

① aromatic oil: mainly aromatic oil. Brown viscous liquid, the best compatibility with rubber, processing performance, and absorption speed. Suitable for natural rubber and a variety of synthetic rubber; Rubber Products drawback is contaminated, suitable for dark rubber products.

② naphthenic oil: the main naphthenes. Rubber Products Light yellow or transparent liquid, compatible with rubber than aromatic oil, but the pollution is less than aromatic oil, suitable for NR and a variety of synthetic rubber.

③ paraffin oil: also known as paraffinic oil, mainly linear or branched paraffin. Colorless transparent liquid, low viscosity, poor compatibility with rubber, Rubber Products poor processing performance, slow absorption, and more for saturated rubber, pollution is small or no pollution, should be used in light-colored rubber products.

(1) Operating oil viscosity The higher the viscosity of the operating oil, the more viscous the oil, the oil on the processing performance of the compound and the physical properties of the vulcanizate. The use of low viscosity operating oil, good lubrication, Rubber Products cold resistance increased, but in the processing of volatile loss. When the flash point below 180 ℃, the volatile loss is greater, should pay special attention.

The viscosity of the operating oil has a lot to do with the temperature. The viscosity at low temperatures is higher, so the nature of the oil has a great effect on the low temperature performance of vulcanizates. Rubber Products The use of low viscosity (kinematic viscosity at -18 ° C) at low temperatures allows the low temperature performance of vulcanizates to be obtained improve. The viscosity of the high aromatic hydrocarbon oil is more dependent on the temperature than the alkane oil.

The viscosity of the operating oil is related to the heat generation of the vulcanized rubber, and the rubber product using the high viscosity oil is hot. In the case of the same viscosity, the heat of the aromatic oil is low. Rubber Products The tensile strength and elongation increase with the increase of the viscosity of the oil, and the flexural rigidity becomes better, but the tensile stress becomes smaller. Rubber Products The same viscosity of the oil, such as the addition of the same volume, the aromatic oil than the saturated oil can get a higher elongation.

2) Relative density In the petroleum industry, the relative density at 60 ° C is usually measured. The relative density of the rubber processing oil when the rubber product is sold by weight is very important. Typically, the relative density of the aromatic oil is greater than the relative density of the alkane and naphthenic oils. Rubber processing oils are often sold in volume, while in rubber processing are compounded by weight.