Nitrile rubber o-rings Process Description

Nitrile butadiene rubber o-rings and acrylonitrile is prepared by the polymerization of the copolymer. Production process phase composed of water and hydrocarbon phase polymerization, degassing and monomer recovery, drying and packaging processes composed cohesion.

The main process is butadiene, acrylonitrile both monomers proportion to the preparation for the hydrocarbon phase, will be opened powder, sodium hydroxide, sodium pyrophosphate, triethanolamine formulated as an aqueous phase, and ready modifiers and activator solution. The aqueous phase was successively measured in the polymerization reactor, hydrocarbon phase, solution excitation regulator and tapping into, and then heated with stirring, polymerization reaction was conducted at 30 ~ 50 ? temperature conditions.

When the total monomer conversion rate of 65 to 70%, began to cool discharge, while the glue polymerization terminating agent is added into the solvent. Glue in degassed by vacuum distillation column, the unreacted butadiene, acrylonitrile distilled off recovery. After removal of mortar monomer cohesion sodium chloride solution, in the long mesh machine into a belt, then washed, vacuum tank and pressure roller dehydration, drying oven after packaging for the finished product.

The device used in the production of raw materials butadiene, acrylonitrile both a flammable liquid and toxic substances, including acrylonitrile as grade ? poison.