8 results about "Polysulfide rubber" patented technology

This invention relates to the field of epoxy encapsulant technology, and discloses an epoxy encapsulant for sensors and its preparation method. The method includes premixing epoxy resin base material, primary dispersion, secondary mixing, final mixing and degassing, filtration and packaging. Through the synergistic combination of bisphenol A type epoxy resin and phenolic epoxy resin, and the ring-opening reaction with an acid anhydride curing agent, a dense three-dimensional cross-linked network structure is formed, which closes the pores between molecular chains and blocks charge migration paths, thereby improving the electrical insulation performance of the epoxy encapsulant. At the same time, the introduction of polysulfide rubber toughening agent enhances the flexibility and impact resistance of the colloid, improving the reliability of the encapsulation. By using plasma treatment and silane coupling agent surface modification of nano-alumina, the insulation effect is strengthened and the overall mechanical strength of the encapsulant is improved.

The utility model provides a kind of PET-MR imaging quality detection multifunctional phantom, belong to PET / MR quality detection technical field, comprising: by inside to outside sequentially arranged uniformity detection module, PET / MR fusion degree test module, PET / MR resolution test module, PET / MR attenuation correction module;Uniformity detection module is by a cylindrical 68Ge-68Ga model body, 68Ge and epoxy resin and liquid polysulfide rubber are evenly mixed for simulating uniform radioactive division;PET / MR fusion degree test module includes hollow cylinder, when testing, inject Na source in hollow cylinder, carry out PET / MR scanning, obtain image fusion accuracy according to the obtained scanning image;It can be used for quality control to PET / MR imaging instrument, also can be used for finding the optimal scanning parameter of PET / MR imaging instrument, for teaching demonstration, for tracer screening etc., with wide application range.

The application belongs to the technical field of organic polymer compound preparation, and relates to an oilfield water injection and polymer injection glass steel pipeline material and a preparation method, which comprises, from inside to outside, an anticorrosive wear-resistant inner layer and a high-pressure anti-aging outer layer; the anticorrosive wear-resistant inner layer comprises epoxy vinyl ester resin, graphene-polytetrafluoroethylene composite powder, nano silicon dioxide, nano zinc oxide, isothiazolinone microbial inhibitor, methyl tetrahydrophthalic anhydride curing agent and dimethyl aniline accelerator; the high-pressure anti-aging outer layer comprises bisphenol A type epoxy resin, phenolic resin, surface modified glass fiber, nano silicon carbide, aromatic amine curing agent, triethanolamine accelerator, polysulfide rubber toughening agent, ultraviolet absorber, antioxidant and nano boron nitride; through overall cooperation of component matching and process improvement, the performance is obviously improved, the oilfield water injection and polymer injection complex working conditions are adapted, and a plurality of technical shortcomings of the existing glass steel pipeline are solved.

This invention relates to the field of antique building material preparation technology, specifically to an antique building material and its preparation method. The raw materials, calculated as 100 parts in total, include 35 parts of cedar wood powder, 28 parts of epoxy resin E51, 12 parts of bamboo fiber powder, 10 parts of heavy calcium carbonate, 5 parts of diethylenetriamine, 3 parts of coupling agent KH-550, 2 parts of antioxidant 1010, and 3 parts of polysulfide rubber. The method includes the following steps: S1, raw material pretreatment stage; S3, molding stage; S4, post-treatment stage. This invention uses natural cedar wood powder and bamboo fiber powder as core raw materials, realizing the resource reuse of agricultural and forestry waste, reducing dependence on non-renewable resources, and possessing both environmental value and resource recycling significance. The raw materials contain no harmful chemical additives, and all components meet relevant safety standards. During processing, sealed equipment and dust collection devices reduce pollutant emissions, and the finished product has minimal environmental impact after disposal, meeting the needs of green production and sustainable development.

The application discloses a kind of multifunctional rubber auxiliaries and its preparation method in the field of rubber processing, the method is by the thiol-isocyanate bifunctional cage silsesquioxane and epoxy-terminated polysulfide compound, end thiol liquid polysulfide rubber and allyl glycidyl ether are combined by photo-initiated click reaction to obtain epoxy-terminated polysulfide, then be blended with polybutadiene, stearic acid, zinc oxide and accelerator granulation, obtain multifunctional rubber auxiliary masterbatch.The auxiliary can provide nano-enhanced, dynamic covalent crosslinking and interfacial compatibility in rubber mixing, significantly improve the mechanical properties, aging resistance and processing stability of vulcanized rubber.Process conditions are mild, suitable for industrial production.

The application provides a preparation method of a nano-penetrating reaction-adhesive high-molecular waterproof roll material and belongs to the technical field of waterproof roll materials. The nano-penetrating reaction-adhesive high-molecular rubber material is prepared by taking asphalt, naphthenic oil, epoxy resin, polysulfide rubber, a bitumen modifier, petroleum resin, a ketone imine curing agent, a silane coupling agent and calcium carbonate as raw materials, and then the nano-penetrating reaction-adhesive high-molecular rubber material is compounded with a carcass layer and a release film to obtain the nano-penetrating reaction-adhesive high-molecular waterproof roll material. The synergistic mechanism of 'chemical bonding + physical anchoring + ultrahigh cohesive strength' is used to improve the peeling strength with cement mortar.

This invention discloses a method for preparing polysulfide rubber, its system, and its applications. The polysulfide rubber obtained using the method of this invention further reduces the content of low molecular weight thiols, improving its mechanical properties and making it more suitable for sealing materials, preferably for building sealing materials, such as sealing insulated glass, solar panels, aviation seals, and linings for aircraft oil pipes and integral aircraft fuel tanks.

This invention discloses a self-healing rubber magnet and its preparation method. The preparation method includes: S1, weighing the following components in parts by weight: 100 parts rubber matrix; 150-400 parts magnetic powder; 10-45 parts self-healing agent; 2-5 parts vulcanizing agent; 1-2 parts vulcanization auxiliaries; 1-6 parts coupling agent; 0.5-2 parts antioxidant; mixing and drying the magnetic powder and coupling agent to obtain surface-modified magnetic powder; S2, plasticizing the rubber matrix, then adding the self-healing agent and antioxidant and mixing to obtain a rubber mixture, wherein the self-healing agent is selected from polysulfide rubber containing dynamic disulfide bonds, a composite of natural rubber grafts containing carboxyl groups and ZnO, or polyether thiourea glycol; S3, adding the modified magnetic powder to the rubber mixture and mixing, then adding the vulcanizing agent and vulcanization auxiliaries and continuing to mix to obtain a compound; S4, vulcanizing and molding the compound. This rubber magnet maintains high magnetic properties while possessing a highly efficient self-healing function.