4 results about "Chlorohydrins" patented technology

The invention discloses a self-repairing mute tire and a preparation method thereof, and relates to the technical field of tires, the self-repairing mute tire comprises a tire body, and a self-repairing rubber layer and a mute material which are sequentially attached to the inner wall of the tire body from inside to outside; the self-repairing adhesive layer is prepared from the following components: epichlorohydrin rubber, acrylate rubber, a rosinyl phenyl phosphine oxide isoxazolyl functional polymer, 4, 4-chloroformyl phenyl ether, a catalyst, 2, 2-bis [4-(4-aminophenoxy) phenyl]-1, 1, 1, 3, 3, 3-hexafluoropropane, trithiocyanuric acid, a filler, an accelerant TMTD (Tetramethylthiuram Disulfide) and an auxiliary agent; the rosinyl phenyl phosphine oxide isoxazolyl functional polymer comprises structural units introduced through a condensation polymerization reaction of the following monomers: glycerol triabietate, bis (4-carboxyl phenyl) phenyl phosphine oxide and 3, 5-isoxazoledicarboxylic acid. The tire is remarkable in self-repairing effect, good in mute performance, sufficient in performance stability and long in service life.

This invention relates to the field of rubber materials technology. It provides a chlorohydrin rubber material with fatigue resistance, low-temperature resistance, and low air permeability, as well as its preparation method. The raw materials of the chlorohydrin rubber material, by weight, include 95-105 parts of chlorohydrin rubber, 33-37 parts of carbon black, 0.29-0.31 parts of sulfur, 0.9-1.1 parts of accelerator CZ, 1.1-1.3 parts of accelerator ETU, 4.8-5.2 parts of acid scavenger, 2.8-3.2 parts of antioxidant, 13-17 parts of plasticizer, 1.3-1.7 parts of dispersant, 1.5-2.5 parts of lubricant, and 2.0-3.0 parts of sodium stearate. The chlorohydrin rubber is an epichlorohydrin-ethylene oxide binary copolymer chlorohydrin rubber with a chlorine content of 24-26%. The chlorohydrin rubber material of this invention, without adding homopolymer raw rubber, can simultaneously satisfy the requirements of high fatigue resistance, excellent low-temperature resistance, and low air permeability.

This application provides a method for the continuous preparation of chlorohydrin rubber, belonging to the field of rubber manufacturing. The method involves continuously feeding toluene, monomers, and a catalyst into a pipeline reactor, controlling the reaction temperature for continuous polymerization. After the reaction is complete, a terminator is added to obtain a chlorohydrin rubber reaction solution. This solution is then fed into a first horizontal biaxial kneading devolatilizer for a first vacuum devolatilization process, achieving a solid content of 65-85% to obtain quasi-solid chlorohydrin rubber. The quasi-solid chlorohydrin rubber is then fed into a second horizontal biaxial kneading devolatilizer for a second vacuum devolatilization process. Moisture is added during this process, and the material temperature is controlled to not exceed 100°C in the later stages of devolatilization. After devolatilization, the material is discharged and cut to obtain devolatilized rubber granules, which are then extruded, metered, and packaged to obtain the finished chlorohydrin rubber product. This application achieves precise temperature control and a narrow molecular weight distribution through the synergy of the pipeline reactor and the two-stage devolatilizer, reducing toluene residue and gel content in the product, resulting in stable Mooney viscosity and excellent batch-to-batch consistency.

The application discloses a synthesis method of chiral chlorohydrin or chiral cyclic ether. The synthesis method of the application uses a simple and easy-to-synthesize chiral Ir / f-phamidol complex to efficiently asymmetrically catalyze hydrogenation reduction of omega-chloroketone, and divergent synthesis of chiral chlorohydrin shown in structural formula II or chiral cyclic ether shown in structural formula III is realized through one-step reaction; wherein, the chiral Ir / f-phamidol complex is a complex of metal iridium precursor [Ir(cod)Cl]2 and f-phamidol structural ligand. The synthesis method of the application has the advantages of simplicity, easy operation, high catalytic efficiency, high yield and high enantioselectivity; and the raw materials used are cheap and easy to obtain, and the cost is low, thus providing a new scheme and way for large-scale production of chiral chlorohydrin or chiral cyclic ether.