7 results about "Silicone matrix" patented technology

The application relates to the field of color paste, in particular to a silicone leather color paste and a preparation method thereof. The silicone leather color paste comprises the following raw materials in mass parts: 55-75 parts of film-forming resin, 10-30 parts of colorant, 9-15 parts of combined reinforcing agent, 3-6 parts of dispersing agent, 3-10 parts of filler, 2-4 parts of wetting agent, 3-10 parts of water, 2-10 parts of thickening agent, 0.3-0.5 parts of defoaming agent, 0.2-0.4 parts of ultraviolet absorber and 5-10 parts of polymeric emulsion. The finally prepared color paste material has excellent pigment dispersibility and compatibility with a silicone matrix, can avoid the use of organic solvents, avoid greater environmental problems, can finally maintain good stability and storage performance and the like, the comprehensive performance is greatly improved, and the higher application performance requirement of the silicone leather for the color paste can be effectively met.

This invention relates to a transparent polishing pad for photoelectrochemical mechanical polishing (PECMP), its preparation method, and its application method. The polishing pad is made of a highly transparent silicone matrix with ultraviolet light transmittance, and nano-silica abrasive particles are uniformly dispersed within the pad, giving it both excellent light transmission and stable mechanical polishing capabilities. This enables effective synergy of optical, electrical, chemical, and mechanical multi-energy fields in semiconductor PECMP processes. The transparent pad has excellent ultraviolet light transmittance, allowing ultraviolet light to penetrate the polishing pad during processing, achieving in-situ photochemical irradiation and chemical etching of the workpiece surface processing area, effectively improving the chemical reaction rate of the workpiece. Furthermore, the nano-silica abrasive particles dispersed in the transparent polishing pad maintain optical path continuity while providing stable mechanical cutting micro-actions. The transparent polishing pad with abrasive properties can achieve a dynamic balance of chemical and mechanical properties across the entire processing surface, effectively improving polishing efficiency and uniformity.

The application discloses a preparation method and application of a silicone gel modified tungsten disulfide insulating composite material for high-voltage and high-power power electronic device packaging, and proposes that tungsten disulfide is modified by Tris and a silane coupling agent to prepare an organic silicone gel composite insulating material; the method effectively improves the interface compatibility of inorganic fillers and an organic silicone matrix, solves the problem of easy agglomeration of tungsten disulfide nanomaterials, realizes uniform dispersion of the tungsten disulfide nanomaterials in the gel, and has the advantages of simple process, mild conditions and facilitation of large-scale production since the preparation process only needs normal-temperature ultrasonic, magnetic stirring, centrifugal washing and vacuum drying; the introduction of tungsten disulfide regulates the trap energy level distribution and improves the electric field distribution and heat dissipation by using the heat conduction characteristics of the tungsten disulfide; and the results show that the breakdown field strength is increased by 20.4%, the thermal weight loss T5% reaches 377 DEG C, the initial voltage of partial discharge is increased by 48.5%, and the comprehensive performance meets the requirements of new-generation high-voltage and high-power power electronic device packaging.

The application discloses a high-thermal-conductivity gasket with resilience, which is a single-layer integrated structure, and a main body of the gasket is composed of a continuous-phase matrix of an addition-type silicone gel, the gel is formed through a hydrosilation reaction of a special-structure vinyl silicone oil and a polysiloxane cross-linking agent containing Si-H groups; and carbon fibers that are surface-modified are uniformly dispersed in the gel matrix. The application introduces carbon fibers that are subjected to surface oxidation treatment as a thermal-conductivity functional phase, controls the length, diameter and length-diameter ratio of the carbon fibers, and combines a bimodal distribution and a micro-beam compound design to realize three-dimensional uniform dispersion under low-shear mixing and vacuum defoaming processes, so that a continuous thermal-conductivity channel is formed through the matrix; the interface compatibility of the carbon fiber surface polarity after modification with the silicone matrix is improved, the interface is firmly combined, the scattering and thermal resistance of phonons at the interface are effectively reduced, and high-efficiency thermal conduction is realized; micro-mechanical support is provided in the thickness direction, the flow and collapse of the matrix under long-term compression are inhibited, and the resilience retention rate is improved.

A substrate (12) for delivering a biologically active substance, the substrate (12) comprising: a cross-linked silicone matrix formed by cross-linking a silicone polymer using at least one crosslinking agent comprising a tetraalkoxysilane, the cross-linked silicone matrix defining a plurality of domains, and a composition contained within the domains of the cross-linked silicone matrix, wherein the composition comprises: at least one monomeric glycol and at least one biologically active substance.

The present application relates to the technical field of heat conduction, in particular to a multi-stage diamond filler composite heat-conducting silicone grease and a preparation method thereof. The present application provides a multi-stage diamond filler composite heat-conducting silicone grease, which comprises a silicone matrix and fillers distributed in the silicone matrix, wherein the fillers comprise diamond microspheres, nano heat-conducting bridges and heat-conducting whiskers; the nano heat-conducting bridges form heat-conducting bridges between the diamond microspheres, and the heat-conducting whiskers are filled in the gaps between the diamond microspheres and the nano heat-conducting bridges. The present application provides a multi-stage diamond filler composite heat-conducting silicone grease and a preparation method thereof, and can provide a composite heat-conducting silicone grease with excellent heat conduction performance.

This invention discloses a core-shell structured flame retardant and its application method in thermally conductive materials. The method includes dispersing antimony phosphate oxyphosphate and boron nitride nanosheets in a liquid medium and subjecting them to a hydrothermal reaction to form a thermally conductive-flame-retardant composite core encapsulated by boron nitride nanosheets. After washing and drying, a core-shell structured thermally conductive flame retardant precursor is obtained. The precursor is dispersed in a solvent and sequentially coated with a borosilicate-modified phenolic resin inner shell through an in-situ polycondensation reaction, followed by a graphene nanosheet outer shell coating through a reduction deposition reaction. After separation and drying, a multifunctional core-shell structured thermally conductive flame retardant is obtained. After surface activation treatment, it is composited with a silicone matrix and thermally conductive auxiliary components, and directly molded into a high thermal conductivity and flame retardant heat dissipation interface material through a curing process. Through the multi-layer design and systematic application method of the core-shell structured flame retardant, a highly efficient synergy between the heat dissipation performance and fire safety of the thermally conductive material is achieved.