68results about How to "High flame retardant level" patented technology

The invention relates to a flame-retardant heat-conducting double-component epoxy resin pouring sealant and a preparation method thereof. The pouring sealant is composed of a component A and a component B in a weight ratio of 100: 80 to 100: 120. The pouring sealant prepared in the invention has the advantages of a long operation period, a low thermal expansion coefficient after curing, a high flame retardation grade, reaching grade UL94-V0, good thermal conductivity and excellent electrical properties, and is applicable to high temperature electric packaging of power semiconductors, rectifiers, transformers, etc.

The invention provides a nanometer strengthening fluoride silicone rubber long-acting anti fouling and flashing coating material (nano PRTV coating material) which is used on an external insulation layer of a power system high pressure transmission and transformation device. The coating is composed of the following compositions (weight portion) of 20-40 percent of hydroxyl-fluoride containing polysiloxane, 2-5 percent of small molecular siloxane, 1-6 percent of cross linker, 0.02-1 percent of catalyst, 2-6 percent of nano silicon dioxide, 4-6 percent of decabromodiphenyl ethane, 1-2 percent of pigment and 30-50 percent of solvent. The coating provided by the invention is provided with perfect flame retardancy, solvent resistance, oil resistance, high and low temperature resistance and good self-cleaning performance. The surface of the coating material is smoother than dirt flash preventing coating material. Compared with the dirt flash preventing coating material, the coating material of the invention is greatly improved in aspects of hydrophobic migration speed, proportionality, sustainability, etc. Once filming can be realized. With the service life of more than 20 years, the coating material can be used permanently.

The invention discloses a halogen-free flame retardant glass fiber reinforced polyester composite and a preparation method thereof. The invention is characterized in that the preparation method of the composite comprises the following steps: mixing polyester, glass fiber, microencapsulated metal hypophosphite and microencapsulated nitrogen-containing flame retardant evenly, heating to 230-275 DEG C, and performing melt blending; and extruding, pulling, cooling, granulating and drying to obtain the composite, wherein the weight percentages of the polyester, glass fiber, microencapsulated metal hypophosphite and microencapsulated nitrogen-containing flame retardant to the total weight of the composite are 40-60%, 25-30%, 10-20% and 5-10% respectively. The halogen-free flame retardant glass fiber reinforced polyester composite has both good flame resistance and physical properties; the defects of the existing reinforced polyester material modification technology that the halogen-containing flame retardant inflicts great damage on the environment, the additional amount of the inorganic flame retardant is great and the material has poor physical properties and weather resistance can be overcome; and the composite has wide application prospect.

The invention relates to halogen-free flame retarding and glass fiber reinforced resin and its preparation method. The reinforced resin comprises the following components by weight percent (wt%): 30-75 of PBT (poly(butylene terephthalate)) resin, 0-50 of alkali-free glass fiber, 8-15 of a halogen-free fire retardant, 0-10 of a toughening agent, 0.2-0.6 of an anti-oxidant, 0-1 of a compatibilizer,and 0.5-1 of a processing aid. The preparation method consists of the steps of: conducting surface treatment to alkali-free glass fiber with a coupling agent, and adsorbing the halogen-free fire retardant on the surface of the alkali-free glass fiber, drying the PBT resin, and mixing it with the toughening agent, the anti-oxidant, the compatibilizer and the processing aid and placing the mixture in a double-screw extruder, adding alkali-free glass fiber in the downstream of the extruder, and carrying out fusing, mixing, extruding, cooling, drying and granulating, thus obtaining the product. The reinforced resin of the invention has the advantages of no halogen, low smoke, environmental protection, good flame retarding effect, and good disperse effect of the halogen-free fire retardant in a resin matrix. When heated, the halogen-free fire retardant can form a uniform, porous, expanded and compact carbon layer, which cooperates with the glass fiber so as to prevent the diffusion of heat, combustible volatile substances, and the like.

The invention relates to the technical field of recycling of polypropylene regenerated materials and particularly relates to a regenerated polypropylene environment-friendly modified material and a preparation method thereof. The regenerated polypropylene environment-friendly modified material comprises the following substances in parts by weight: 100 parts of polypropylene recycled materials, 10-15 parts of glass fibers, 30-40 parts of nitrogen-phosphor compounded expansion flame retardants, 0.3-0.8 part of a synergistic flame retardant, 4-10 parts of an anti-impact modifier, 1-2 parts of an antioxidant, and 0.1-0.5 part of a coupling agent, wherein the synergistic flame retardant is silicon dioxide, the anti-impact modifier is recycled rubber material, the coupling agent is a titanate coupling agent. According to the regenerated polypropylene environment-friendly modified material disclosed by the invention, the regenerated polypropylene is low in toxicity, low in smoke, free of melt drops and high in oxygen index, the material is high in mechanical performance and low in preparation cost, capable of saving the material cost, environmentally friendly, economical and efficient. The polypropylene recycled material obtained by the preparation method is high in polypropylene purity, less in impurity and simple in preparation process, and industrialization is easy to realize.

The invention relates to a high-temperature vulcanized silicone rubber sealing strip. The vulcanized silicone rubber sealing strip is mainly prepared from the following raw materials in parts by weight: 100 parts of methyl vinyl raw silicone rubber, 10-100 parts of a modified inorganic flame-retardant agent, 0.1-1 part of a platinum-containing flame-retardant catalyst, 20-80 parts of reinforcementfiller, 5-10 parts of a structure control agent, 0.2-1 part of a cross-linking agent, 0.01-0.1 part of an inhibitor and 0.5-3 parts of color masterbatch, wherein the modified inorganic flame-retardant agent is prepared from tetramethyldivinyldisilazane and aluminum hydroxide; the platinum-containing flame-retardant catalyst is prepared from chloroplatinic acid, octanol, fumed silica and vinyl-terminated polydimethylsiloxane. The high-temperature vulcanized silicone rubber is excellent in flame-retardant property and excellent in mechanical property.

The invention relates to an insulation composite material for an exterior wall and an application method. The composite material is characterized in that the interior and exterior surface layers of a rigid polyurethane layer are combined with inorganic hollow microsphere polymer composite insulation layers, an anti-crack mortar layer is arranged on the exterior inorganic hollow microsphere polymer composite insulation layer and a wall decoration layer is combined with the exterior surface layer of the anti-crack mortar layer. The application method is as follows: the exterior wall to be treated is sequentially coated with the interior hollow microsphere polymer composite insulation layer, rigid polyurethane and the exterior hollow microsphere polymer composite insulation layer, the anti-crack mortar layer is coated on the exterior hollow microsphere polymer composite insulation layer and the wall decoration surface layer is coated on the exterior surface layer of the anti-crack mortar layer. The composite material has good heat insulation property and quick construction method, is strongly adaptive to main structures, reaches higher flame retardant level, is energy-saving and environment-friendly, is suitable for insulation of various walls, especially exterior walls, and is applicable to floors.

The invention relates to the technical field of recycling of HIPS regenerated materials, and particularly relates to a regenerated HIPS environmental-friendly modified material and a preparation method thereof. The regenerated HIPS environmental-friendly modified material comprises the following substances in parts by weight: 100 parts of HIPS recovered materials, 3-6 parts of toughening agents, 15-20 parts of flame retardants, 1-2 parts of flame-retardant synergists, 10-12 parts of anti-impact modifying agents, 1-2 parts of antioxidants, 1-4 parts of coupling agents, 2-5 parts of lubricating agents and 2-5 parts of stabilizing agents, wherein the flame retardants are formed by mixing a compound flame retardant of ammonium polyphosphate, magnesium hydroxide and boric acid with montmorillonite-hexadecyl trimethyl ammonium bromide. The regenerated HIPS has the advantages of low toxicity, low smoke and no corrosion and is favorable to the flame retardance of HIPS. The regenerated HIPS environmental-friendly modified material disclosed by the invention is high in mechanical property, low in cost, capable of effectively saving the material cost, environmental-friendly, economic and effective. The preparation method disclosed by the invention has the advantages of high HIPS purity and few impurities of an obtained HIPS recovered material, simple preparation process and easiness for industrialization realization.

The invention relates to an insulation composite material for an exterior wall and an application method. The composite material is characterized in that the interior and exterior surface layers of a rigid polyurethane layer are combined with inorganic hollow microsphere polymer composite insulation layers, a wire mesh and an anchor bolt are arranged on the exterior inorganic hollow microsphere polymer composite insulation layer and wall tiles are combined with the exterior surface layer of the exterior inorganic hollow microsphere polymer composite insulation layer. The application method is as follows: the exterior wall to be treated is sequentially coated with the interior hollow microsphere polymer composite insulation layer, rigid polyurethane and the wire mesh, the wire mesh is fixed with the exterior wall by the anchor bolt, the exterior hollow microsphere polymer composite insulation layer is coated on the fixed wire mesh and the wall tiles are affixed to the exterior surface layer of the exterior hollow microsphere polymer composite insulation layer. The composite material has good heat insulation property and quick construction method, is strongly adaptive to main structures, reaches higher flame retardant level, is energy-saving and environment-friendly, is suitable for insulation of various walls, especially exterior walls, and is applicable to floors.

The invention relates to a preparation method of flame-retardant polyurethane resin. The preparation method comprises the steps of adding cyclodextrin and resorcinol bi(diphenyl) phosphate (RDP) to a solvent, conducting mixing, and obtaining a cyclodextrin/RDP compound; making the cyclodextrin/RDP compound be subjected to still standing for seimentation, filteration, vacuum drying and washing, and obtaining a cyclodextrin/RDP clathrate compound; adding the cyclodextrin/RDP clathrate compound to polyuretane resin, then adding the solvent, stirring the mixture uniformly, leaving the mixture still standing, conducting defoaming and formation, and obtaining the flame-retardant polyurethane resin. The preparation method of the flame-retardant polyurethane resin is simple and easy to control, the problems that resorcinol diphenyl phosphate is poor in dispersity in a base body and prone to migrating when serving as fire retardant can be solved, and meanwhile the mechanical property and the flame retardant property of polyurethane are substantially improved.

The invention relates to a medicinal flame-retardant plastic packaging material and a preparation process thereof, belonging to the technical field of medicinal packaging materials. The medicinal flame-retardant plastic packaging material has a three-layer structure, an inner layer consists of PE, PLA, PHBV and ECO, a middle layer consists of PE, PLA, PHBV and EVA, and the outer layer consists of PE, PLA, PHBV and ECO. According to the preparation process, components are mixed uniformly according to the formula amount, film blowing is implemented by adopting a three-layer film blowing machine, and finally, rolling is implemented to form a film or cutting is implemented to prepare a bag. The degradable components contained in the plastic packaging material can be degraded gradually under the conditions of light, water and microorganisms in a short time to form a large-area hole, so that the mechanical properties of materials can be lowered, and the degradation of the materials can be accelerated; the contained flame-retardant components play the role of synergistic flame retardance, so that the medicinal flame-retardant plastic packaging materials can be applied to medicine packaging, particularly the packaging of medicines which are directly contacted, and the medicinal flame-retardant plastic packaging material provides a good, excellent and safe selection for the production and packaging of medicines.

The invention belongs to the field of foam gap fillers, and especially relates to a B2 grade flame retardation polyurethane foam material. The B2 grade flame retardation polyurethane foam material comprises, by mass, 10-70 parts of polyether polyol I, 10-50 parts of polyether polyol II, 20-40 parts of mixed flame retardation polyether polyol III, 20-80 parts of paraffin, 3-5 parts of polyether modified polysiloxane, 2-4 parts of a catalyst, 200-350 parts of isocyanate, 40-80 parts of methyl ether, 30-90 parts of liquefied petroleum gas and 0-30 parts of TCPP; the molecular weight of the polyether polyol I is 1000, and the functionality of the polyether polyol I is 3; the molecular weight of the polyether polyol II is 400, and the functionality of the polyether polyol II is 2; and the mixed flame retardation polyether polyol III, is a mixed flame retardation polyether, the average molecular weight of the mixed flame retardation polyether polyol III is 1000, and the average functionality of the mixed flame retardation polyether polyol III is 2.6. The mixed flame retardation polyether polyol III is used, and the formula is improved, so true B2 grade flame retardation is realized, the oxygen index is 26 or above, the flame retardation grade of foam is substantially improved, and the flame retardation performance is stable.

The invention relates to a sealing material and particularly relates to a silicone sealant for a stone curtain wall. The silicone sealant is prepared from the following raw materials: a dimethyl siloxane polymer, (3-methyl butoxy)acetic acid-allyl alcohol ester, 2-(1,3-dimethyl-2,6-dioxo-2,3,6,7-tetrahydro-1H-purine-7-yl)acetic acid, hexamethyldisiloxane, 4-hydroxy-3-methoxy acetophenone and the like. The silicone sealant for the stone curtain wall has the advantages of good adhesive property, high flame retardance level and relatively long shelf life, facilitates long-time storage and is easy and convenient to construct with short time; and the preparation method is simple and easy to learn, the machine is convenient to operate, and large-scale production in a plant is promoted.

The invention discloses environment-friendly flame-retardant reinforced polypropylene resin and a preparation method thereof. The environment-friendly flame-retardant reinforced polypropylene resin comprises, by weight, 100 parts of polypropylene resin, 20-30 parts of flame retardant, 4-8 parts of flame retardant synergist, 10-30 parts of reinforcing filler, 0.4-2 parts of lubricating agent, 0.2-1part of antioxidant and 0.2-2 parts of coupling agent. The preparation method includes: using the coupling agent to perform surface pretreatment on the reinforcing filler, adding the polypropylene resin, the flame retardant, the flame retardant synergist, the lubricating agent and the antioxidant into the pretreated reinforcing filler, evenly mixing, and performing extrusion granulation. The environment-friendly flame-retardant reinforced polypropylene resin and the preparation method thereof have the advantages that the interaction between the reinforcing filler and the resin is increased byusing the coupling agent to pretreat the reinforcing filler, and material mechanical performance is further increased; the flame-retardant reinforced polypropylene resin is excellent in flame retardance and high in mechanical performance, the thermal deformation temperature of the flame-retardant reinforced polypropylene resin is increased, and accordingly the application range and operation performance stability of the flame-retardant reinforced polypropylene resin are increased.

The invention relates to the technical field of recycling of an ABS reclaimed material, and particularly relates to a reclaimed ABS flame-retardant modified material and a preparation method thereof. The reclaimed ABS flame-retardant modified material comprises the following substances: an ABS recycling material, a composite flame retardant, a flame-retardant synergist, a composite anti-aging agent, an antioxidant, a composite toughening agent and a coupling agent. The reclaimed ABS flame-retardant modified material prepared through the method disclosed by the invention has high flame-retardant grade as high as V-0 grade, is high in ageing resistance through the addition of the composite anti-aging agent, can be used for enhancing the tensile strength and the bending strength through the addition of the toughening agent, has the advantages of high anti-impact strength, good processing flowability, high glossiness of a finished product, stability in thermal deformation property, high char yield after combustion and no melting dropping and is greatly enhanced in flame retardance without being influenced in mechanical property. The preparation method disclosed by the invention has the advantages of high ABS purity, few impurities and simple preparation process of the obtained ABS recycling material and excellent property and easiness for industrialization realization of reclaimed ABS.