8 results about "Methyl phenyl polysiloxane" patented technology

The invention discloses a blended neutron / gamma discrimination polysiloxane scintillator and a preparation method thereof. The polysiloxane scintillator is composed of a matrix, a primary fluorescent dye, a secondary fluorescent dye and a cross-linking agent. A matrix of the scintillator is a copolymer of methyl phenyl polysiloxane and phenyl methyl siloxane, a main fluorescent dye is 2, 5-diphenyl oxazole (PPO), a secondary fluorescent dye is selected from 7-diethylamino-4-methylcoumarin (MDAC), and a cross-linking agent is 1, 3-divinyl-1, 3-diphenyl-1, 3-dimethyl siloxane. The obtained polysiloxane scintillator has good stability and can be used for neutron detection and neutron / gamma discrimination in a strong irradiation field environment.

The invention provides a long-acting bionic antimicrobial functional coating as well as a preparation method and application thereof, and relates to the technical field of marine coatings, the long-acting bionic antimicrobial functional coating comprises a component A and a component B, the component A is prepared from the following raw materials: silanol-terminated polydimethylsiloxane, methyl phenyl polysiloxane, a methylhydrosiloxane-dimethyl siloxane copolymer, an auxiliary agent and an organic solvent a; and the component B comprises the following raw materials: ethyl silicate and an organic solvent b. According to the long-acting bionic antimicrobial functional coating provided by the invention, marine organisms cannot be attached to the surface of a ship body or easily fall off, so that the antifouling effect is achieved, and the pollution path of antifouling paint to the marine environment is fundamentally cut off.

The present invention is a methylphenylpolysiloxane mixture characterized by containing (A) a methylphenylpolysiloxane represented by formula (1), and (B) a methylphenylpolysiloxane represented by formula (2), the content of the component (B) being 0.1-5 mol% based on 100 mol% of the total amount of the components (A) and (B). Thus, provided is a methylphenylpolysiloxane having an increased phenyl group introduction amount, and having a base-sensitive functional group such as an acrylic group, a methacrylic group or a mercapto group introduced in the methylphenylpolysiloxane. (In formula (1), A is a group selected from a (meth)acryloxymethyl group, a 3-(meth)acryloxypropyl group, and a 3-mercaptopropyl group; a is an integer of 2 or more; b is an integer of 3 or more; and c is an integer of 0 or more, where a<b and 5≤a+b+c≤100). (In formula (2), a, b, and c are the same as the aforementioned).

This invention discloses a low-cost, rapidly prepared neutron / gamma-discriminating polysiloxane scintillator and its preparation method. The polysiloxane scintillator comprises a matrix, a primary fluorescent dye, a secondary fluorescent dye, and a crosslinking agent. The scintillator matrix is ​​a copolymer of methylphenyl polysiloxane and polyphenyl-(dimethylsiloxane), the primary fluorescent dye is 2,5-diphenyloxazole (PPO), the secondary fluorescent dye is 7-diethylamino-4-methylcoumarin (MDAC), and the crosslinking agent is 1,3-divinyl,1,3-diphenyl,1,3-dimethylsiloxane. The resulting polysiloxane scintillator possesses neutron and gamma discrimination capabilities, good radiation resistance, stability, and low cost, making it suitable for use in neutron detectors.

The application discloses a preparation method of an organic / inorganic composite coating with transparency, ultraviolet resistance and antifouling property, and comprises the following steps: step one, preparing SiO2 by adopting an acid catalysis sol-gel method; and step two, preparing the organic / inorganic hybrid antifouling coating with high hardness, transparency and ultraviolet resistance by graft polymerization. The method prepares SiO2 by the sol-gel method, constructs a continuous silicone resin network by using methylphenyl polysiloxane resin, simultaneously adds SiO2 of the inorganic phase and MT-PDMS and octocrylene of the organic phase as polymerization reactants, and prepares the organic / inorganic hybrid coating through grafting and polymerization. The unique design makes the coating have excellent transparency, antifouling property and ultraviolet resistance. In addition, the coating also has good hardness and friction resistance, and still maintains excellent transparency and ultraviolet resistance in low-temperature and high-temperature environments.

The invention relates to the technical field of anti-skid sprays, and particularly discloses a sole anti-skid agent and a preparation method thereof. The sole anti-slip agent comprises the following raw materials in percentage by mass: 15-25% of polydimethylsiloxane, 2-5% of methyl phenyl polysiloxane, 4-5% of modified silicon dioxide, 3-5% of butyl rubber, 5-6% of an auxiliary agent and the balance of a solvent, and the modified silicon dioxide is sea urchin-shaped silicon dioxide coated with an amphiphilic polymer. The anti-skid agent for the shoe sole can increase the friction force between the shoe sole and the ground through the microstructure of the film layer and the interaction of water molecules and oil stains in the dry and wet scene (for example, the tile ground encounters water) and even the scene with slight oil stains, and has the advantages of excellent anti-skid and wear-resistant performance, high film forming speed and convenience in use.

The invention discloses a preparation method of an organic / inorganic composite coating with transparency, ultraviolet resistance and antifouling property. The method comprises the following steps: step 1, preparing SiO2 by adopting an acid catalysis sol-gel method; and 2, preparing the organic / inorganic hybrid antifouling coating with high hardness, transparency and ultraviolet resistance through graft polymerization. According to the method, SiO2 is prepared through a sol-gel method, a continuous organic silicon resin network is constructed through methyl phenyl polysiloxane resin, meanwhile, inorganic-phase SiO2 and organic MT-PDMS and octocrylene are added to serve as polymerization reactants, and the organic / inorganic hybrid coating is prepared through grafting, polymerization and the like. Due to the unique design, the coating has excellent transparency, antifouling property and ultraviolet resistance. In addition, the coating also has good hardness and friction resistance, and still keeps excellent transparency and ultraviolet resistance in low-temperature and high-temperature environments.

The application relates to the technical field of defoaming agent preparation, in particular to a high-content organic silicon defoaming agent composition for a high-temperature and high-shear system. The high-content organic silicon defoaming agent composition is prepared by the following steps: firstly, octamethylcyclotetrasiloxane, tetramethyltetraphenylcyclotetrasiloxane and hydrogen-containing polymethylsiloxane are copolymerized to construct a methylphenyl polysiloxane skeleton; secondly, acetyl-terminated allyl epoxy oxirane / epoxy propane copolyether and allyl glycidyl ether are introduced step by step; then, the obtained product is sequentially reacted with N,N-diethyl-1,3-propanediamine, phenyl isocyanate, diisopropylamine and maleic anhydride to obtain a urea-based / esterified modified polysiloxane; finally, the urea-based / esterified modified polysiloxane is compounded with methylphenyl silicone oil, dimethyl silicone oil, hydrophobic fumed silica and precipitated silica to obtain the high-content organic silicon defoaming agent composition. The obtained defoaming agent has the advantages of instant defoaming, excellent sustained defoaming, strong shear resistance, storage stability and no floating oil in a high-temperature circulating cleaning liquid system, a high-speed sand mill slurry system and the like.