9 results about "Sulfur Ethers" patented technology

The invention relates to the technical field of polypropylene plastics, in particular to a high-strength antibacterial polypropylene plastic and a preparation method thereof. The antibacterial polypropylene material comprises the following components in parts by weight: 60-80 parts of polypropylene resin, 5-15 parts of nano titanium dioxide and nano zinc oxide composite particles modified by a special organosilicon polymer, 3-8 parts of an antibacterial agent compounded by quaternary ammonium salt and bioactive peptide, 5-10 parts of a core-shell structure MBS toughening agent and 0.5-2 parts of a hindered phenol-thioether composite antioxidant. 1-3 parts of a calcium stearate processing aid; and 3-8 parts of dopamine modified chopped carbon fibers. The composite material is high in strength, tensile strength, bending strength and impact strength are remarkably improved, and larger external force can be borne; the antibacterial performance is excellent, and the antibacterial rate reaches 95%-99%; the preparation process is environment-friendly and efficient, and the product is good in stability and recoverable; product safety can be guaranteed, the service life is prolonged, and economic and social benefits are good.

Provided is a method for preparing Compound II, wherein the method includes the following steps: using Compound I as a raw material, performing a reaction under the action of an organometallic catalyst and a phase transfer catalyst, and oxidizing with hydrogen peroxide to obtain Compound II. The catalyst utilized in the present application exhibits remarkably high activity for the oxidation of sulfur ether compounds, leading to the preparation of sulfone compounds. The method for preparing Compound II significantly reduces the amount of catalyst required, effectively diminishing the consumption of non-renewable scarce strategic resources, while concurrently reducing the potential hazards to the natural environment. The novel method exhibits a substantial reduction in the amount of catalyst required, leading to a concurrent decrease in the consumption of non-renewable resources. Concurrently, it significantly mitigates potential harm to the natural environment and human health. The solvent utilized in this method is easy to be recycled and reused, and enhances overall process efficiency by reducing resource consumption, waste generation, and treatment costs, thereby rendering it more suitable for industrial production.

The invention provides an anti-aging hot melt adhesive and a preparation method thereof, and belongs to the technical field of hot melt adhesive preparation. The preparation process comprises the following steps: preparing the ultraviolet absorbent; preparing an anti-migration antioxidant; and preparing the hot melt adhesive. The preparation method comprises the following steps: adding anhydrous citric acid and cysteamine hydrochloride to carry out dehydration condensation reaction to produce a product, reacting the product with epoxy chloropropane, and then carrying out ring-opening polymerization reaction on the product and tetrahydrofuran; the hot melt adhesive prepared from the prepared ultraviolet absorbent and coupling agent modified montmorillonite loaded intramolecular synergistic macromolecular antioxidant containing thioether and aromatic secondary amine has good aging resistance.

The invention discloses an anti-oxidation TLPS slurry for through hole plugging of an HDI high-density interconnected printed circuit board, and relates to the technical field of anti-oxidation TLPS slurry. Through synergism of deoxidation of the organic acid activator and endogenous oxidation resistance of the thioether-containing structure curing agent / composite antioxidant, oxidation generation of the copper powder in high-temperature curing can be more effectively inhibited, and therefore the occurrence of oxidation phases is reduced. A long alkyl chain of the special anhydride curing agent is beneficial to reducing interfacial tension and improving wetting and particle rearrangement of the resin on high-filling metal powder, and meanwhile, curing kinetics is regulated and controlled to be lagging behind metal interdiffusion, so that the tendency of holes and uncompact sintering caused by particles locked by too early curing is relieved, and the service life of the high-filling metal powder is prolonged. And finally, a stable metallurgical communication conductive path is easier to form.

This application relates to the field of lubricating oil antioxidants, and specifically discloses a high-temperature antioxidant for lubricating oil, a lubricating oil and a preparation method thereof. A high-temperature antioxidant for lubricating oil, calculated by weight percentage, is composed of the following components: 10-50% of diisooctyl diphenylamine; 25-40% of sulfur ether-modified phenolic antioxidant; the balance is a mixture composed of one or two of hindered phenolic antioxidants and phosphite esters. The high-temperature antioxidant for lubricating oil of this application can be used to prepare lubricating oil, improve the oxidation stability of lubricating oil, extend the oxidation induction period, and significantly improve the high-temperature stability of lubricating oil, so that the high-temperature evaporation amount of lubricating oil is reduced.

The application provides a grafted flexible side chain cation group sulfur ether flexible spacer anion exchange membrane material, a molecular structure formula of the anion exchange membrane material is shown as formula 1: the formula 1 is divided into a flexible side chain functionalized structure unit and a non-functionalized structure unit, the content of the flexible side chain functionalized structure unit is x=0.25-0.40; the content of the non-functionalized structure unit is 1-x=0.60-0.75; n=350-1000, the toughness of the polymer membrane material is improved by introducing a sulfur ether flexible spacer on a polymer main chain; the ion conductivity is improved by synergistically introducing a piperidine ion salt with a long flexible side chain to form a double piperidine structure, and the alkali resistance stability of the polymer membrane material can also be improved.

The invention discloses a high-toughness epoxy resin composition and a preparation process, and particularly relates to the field of modified epoxy resin, and the preparation process comprises the following steps: compounding 5-15 layers of electrostatic spinning nanofiber prepreg with an epoxy resin matrix containing dynamic covalent bonds (furan / bismaleimide), and adding 10-15 parts of SiO2 / polythioether core-shell particles; the viscosity of the resin is regulated and controlled to 800 mPa.s through pre-reaction, and fiber dispersion and interface strengthening are achieved in combination with a stepped curing process. According to the scheme, through the synergistic effect of nanofiber interlayer enhancement, dynamic bond energy dissipation and core-shell particle crack pinning, the impact strength and the bending strength are remarkably improved, meanwhile, the self-repairing potential is achieved, the process stability is high, the problems of fiber swelling, multi-phase interface degradation and internal stress accumulation in a traditional process are solved, and the method is suitable for industrial production. And the bottleneck of single performance and interface deterioration of the traditional toughening scheme is broken through.

The invention relates to an efficient degradable PP composite material and a preparation method thereof, and belongs to the technical field of polymer composite materials. The composite material is prepared from the following components in percentage by weight: 39 to 46 percent of core-shell composite degradable filler, 3.5 to 4.2 percent of compatilizer, 1.8 to 2.3 percent of lubricant, 0.12 to 0.15 percent of nucleating agent, 0.08 to 0.1 percent of antioxidant and the balance of PP resin, according to the core-shell composite degradation filler, gamma-mercaptopropyltriethoxysilane and diallylamine are subjected to an addition reaction to prepare a double-bridge agglomerating agent, the double-bridge agglomerating agent is hydrolyzed and coupled with starch to form double-bridge agglomerating agent doped starch cluster particles, thioether introduced by the double-bridge agglomerating agent and an amino structure form a chelation effect, and the core-shell composite degradation filler is formed. Stannous chloride is enriched on the surfaces of the starch cluster particles, and polylactic acid shell layer coating is formed in situ; after blending, a modified product keeps good mechanical properties, and waste products can be efficiently degraded through simple crushing.

The application discloses an organic sulfur composite agent, a preparation method thereof and application of the organic sulfur composite agent as a vulcanizing agent. The organic sulfur composite agent contains linear organic sulfur and cyclic organic sulfur. The preparation method of the organic sulfur composite agent comprises the following steps: mixing linear low sulfur ether, low-carbon olefin, a sulfur source and an alkaline catalyst, and then performing reaction; and after the reaction is completed, the organic sulfur composite agent is obtained through temperature reduction and separation. The organic sulfur composite agent not only has a simple preparation method and is easy to control, but also contains cyclic organic polysulfide with a long sulfur chain and has a high mass content of the cyclic polysulfide.