8results about How to "Reduce polarity" patented technology

This invention relates to the field of polymer foaming materials technology, and discloses a plant fiber composite nucleating agent for microfoaming of biodegradable materials and its application. The plant fiber composite nucleating agent is made from raw materials comprising the following parts by weight: 80-95 parts of primary ultrafine plant fiber powder, 5-20 parts of surface modifier, and 0.1-5 parts of dispersing lubricating wax; the surface modifier and dispersing lubricating wax are coated on the surface of the primary ultrafine plant fiber powder. The application steps are as follows: adding the plant fiber composite nucleating agent to a biodegradable material matrix to obtain a pre-foaming blend, introducing foaming gas or adding a chemical foaming agent for foaming treatment. The nucleating agent of this invention improves the compatibility between plant fibers and hydrophobic biodegradable matrices, provides heterogeneous nucleation sites in the matrix while increasing the polymer melt strength, inhibits cell coalescence and rupture, and obtains microfoamed materials with uniform pore size. Furthermore, the nucleating agent itself is completely biodegradable.

The present application relates to the technical field of external use patch, disclose a kind of neck shoulder waist leg pain health care patch and its preparation method, the health care patch includes backing layer, ointment layer and anti-adhesion release layer;Ointment layer raw material includes: traditional Chinese medicine extract flow leaching paste, L- (+) -tartaric acid, PVP K30, PEG-400, ternary eutectic solvent, polyacrylate pressure sensitive adhesive matrix and ultrafine medicinal powder.Preparation, after flow leaching paste, tartaric acid etc. are mixed, gel precursor is formed by vacuum dewatering and dealcoholization, swelling is added again with eutectic solvent, and then mixed with pressure sensitive adhesive matrix and medicinal powder high shear, finally coating solidification.The present application constructs physical crosslinking gel network in colloid interior and promotes effective component acid-base salt formation, effectively avoids polar component crystallization precipitation, reduces the skin irritation caused by drug burst release, simultaneously improves the cohesion of ointment, realizes long-acting smooth drug release.

This invention discloses a method with a high proportion of supercage Na + This paper describes the application of exchange-site FAU molecular sieves for the adsorption and separation of fluorine-containing electron gases. The molecular sieve possesses the FAU molecular sieve configuration recognized by the International Zygotes Association (IZA), with a chemical composition molar ratio of Al₂O₃:mSiO₂:nNa₂O, where the molar ratio m of the oxide SiO₂ / Al₂O₃ ranges from 5 to 20. This molecular sieve is synthesized using an initial gel prepared from an organic template agent, water, silicon source, and aluminum source. FAU seed crystals are added, and the charge density of the organic template agent is adjusted. Different cage structures of the FAU molecular sieve are assembled. Furthermore, through mixing with a solid salt containing Na and solid-phase exchange, Na in the supercage is achieved. + Control of the exchange site ratio. Compared with the commercial molecular sieve USY2.6, this invention has a high proportion of supercage Na. + Exchange-site FAU molecular sieves can be used for the adsorption and separation of fluorine-containing electronic gases in gas-phase systems, especially pentafluorochloroethane C2F5Cl (R115) and hexafluoroethane C2F6 (R116), and the separation effect is good.

This invention discloses an industrial-scale chemical preparation method for 1,2-di fatty acid glycerides, comprising the following steps: (A) acetone glycerol is protected with a silyl ether protecting agent and purified by crystallization to obtain intermediate 1; (B) intermediate 1 undergoes a depropionyl protecting group reaction and crystallization to obtain intermediate 2; (C) intermediate 2 undergoes an esterification reaction and crystallization and adsorption to obtain intermediate 3; (D) intermediate 3 undergoes a desilyl ether protection reaction and recrystallization to obtain 1,2-di fatty acid glycerides. This invention, through crystallization purification under different conditions, avoids the disadvantages of traditional chemical methods for preparing 1,2-di fatty acid glycerides, such as the need for multiple column chromatography purification steps, low yield, and difficulty in industrialization. This method features mild operating conditions, high purity, and is easily scalable for large-scale industrialization.

The present application relates to the technical field of photovoltaic packaging materials, and discloses a white photovoltaic packaging adhesive film, a preparation process thereof and a photovoltaic module. The white photovoltaic packaging adhesive film has a multilayer composite structure, including a corrosion-resistant layer facing a photovoltaic cell, a reflective layer and an adhesive layer facing a photovoltaic backboard. The corrosion-resistant layer includes a low-polarity POE resin and / or an EVA resin with a VA content of less than or equal to 10%. The reflective layer includes a specific amount of EVA resin with a VA content of 15-25%, white pigment and insulating reinforced nano filler. The adhesive layer includes EVA resin with a VA content of 30-40% and composite silane coupling agent (including vinyl silane and isocyanate silane compounded at a mass ratio of 1-5:1) prepared at a weight ratio of 100:0.1-2. The white photovoltaic packaging adhesive film has the advantages of high reflectivity, high body resistance, strong peeling strength and peeling strength after hygrothermal aging, excellent corrosion resistance and PID resistance, and no white overflow.

This application relates to the field of cable technology, disclosing a flexible high-strength insulated cable material, its preparation method, and a power cable. The material formulation includes ethylene propylene diene monomer (EPDM) rubber, ethylene-octene copolymer, magnesium hydroxide, solid maleic anhydride, zinc methacrylate, α-methylstyrene dimer, dicumyl peroxide, and a compound antioxidant. During processing, the maleic anhydride undergoes ring-opening upon heating, consuming free water on the surface of magnesium hydroxide in situ, thus improving powder dispersion. The α-methylstyrene dimer acts as a chain transfer agent, inhibiting the long-chain homopolymerization of zinc methacrylate and preventing the formation of hard, brittle crosslinking points within the matrix. The polar graft ends and the hydroxyl groups on the magnesium hydroxide surface construct a reversible coordination network containing metal ion bonds. This invention solves the problems of difficult dehydration and brittle crosslinking in highly filled flame-retardant materials, enabling the material to dissipate strain energy through ion node slippage when stretched or bent, thus possessing high flame retardancy, high tensile strength, and excellent flexibility.

The present application relates to the technical field of high-performance electronic materials, and particularly relates to an inorganic powder modified epoxy resin prepreg for high-frequency high-speed printed circuit board and a preparation method thereof. The prepreg is prepared by impregnating a low-dielectric glass fiber cloth with a resin glue solution and drying, wherein the resin glue solution comprises an epoxy resin composition, a curing agent and an inorganic powder; the inorganic powder is hollow mesoporous silica nanospheres modified by p-chlorophenyl urea loading and hyperbranched polymer grafting. Through functional powder structure design and resin system optimization, the prepreg realizes low dielectric loss, high heat resistance, excellent interfacial bonding strength and good process stability in a synergistic manner, and is suitable for the preparation of high-frequency high-speed copper-clad boards.