79results about How to "Guaranteed flame retardant performance" patented technology

The invention discloses an anti-pollution flashover coating with arc durability, which comprises the following components in parts by weight: 100 parts of hydroxyl-terminated polydimethylsiloxane, 10-25 parts of dimethyl silicone oil, 5-15 parts of a phosphorus flame retardant, 8-20 parts of white carbon black, 5-15 parts of modified mica powder, 15-30 parts of modified calcium carbonate, 10-20 parts of modified glass powder, 5-12 parts of aluminum hydroxide, 5-10 parts of 1, 3-butanediol, 5-10 parts of a flame retardant, 1-5 parts of an anti-aging agent, 1-5 parts of an anti-aging agent, and 1-5 parts of an anti-aging agent. The invention discloses a high-temperature-resistant coating which is prepared from the following components in parts by weight: 0.5-2 parts of 1, 2-bis (trimethoxysilyl) ethane, 5-10 parts of potassium titanate whiskers, 2-6 parts of color paste, 50-150 parts of a solvent, 3-10 parts of a cross-linking agent, 2-6 parts of a silane coupling agent and 1-5 parts of a catalyst. The invention also provides a preparation method of the anti-pollution flashover coating with arc durability. By introducing the modified mica powder, the modified glass powder and the modified calcium carbonate with specific particle sizes and reasonable gradation, the proportion of the filler in the base rubber is ensured, so that the modified mica powder, the modified glass powder and the modified calcium carbonate form a compact and firm ceramic high-temperature-resistant and arc-resistant layer after encountering high temperature of an arc; and the purpose of improving the arc durability is achieved.

The invention provides a high-strength blooming-free PVC (polyvinyl chloride) cable material as well as a preparation method and application of the high-strength blooming-free PVC cable material. The environment-friendly bio-based plasticizer, the organic tin and rare earth composite heat stabilizer, the efficient compound antioxidant, the surface treatment modified nanofiller, the multifunctional processing aid, the phosphorus-nitrogen compound flame retardant and the cross-linking accelerant are matched in a specific proportion. The preparation method comprises the steps of raw material drying, mixing plasticizing, granulation forming and the like. The prepared cable material has the excellent properties of high strength, no blooming, low temperature resistance, high salt resistance and the like, is suitable for preparing various high-performance cables, is particularly applied to cables in a high-temperature-resistant and high-salt-resistant environment, and shows a wide application prospect.

The present application relates to the technical field of thermally conductive insulating plastics, in particular to a graphene-modified high thermal conductive plastic and a preparation method thereof. A graphene-modified high thermal conductive plastic is mainly prepared from a nylon matrix resin, a graphene-modified polyaniline resin, a surface-modified aramid fiber, and a nano-high thermal conductive insulating filler; the mass of the surface-modified aramid fiber accounts for 6-8% of the total mass of the high thermal conductive plastic; the mass of the nano-high thermal conductive insulating filler accounts for 24-28% of the total mass of the high thermal conductive plastic; the mass of the graphene-modified polyaniline resin accounts for 28-36% of the total mass of the high thermal conductive plastic; the nylon matrix resin is composed of PA66 and PA612 in a mass ratio of (6-8): (2-4). The high thermal conductive plastic prepared in the present application not only has good thermal conductivity and heat dissipation, but also has good mechanical properties, flame retardancy and anti-electrical breakdown insulation safety, and is suitable for the field of shell materials for thermal runaway protection of power batteries.

The invention relates to the technical field of foamed silicone rubber and production and preparation processes, in particular to high-hardness foamed silicone rubber and a preparation method thereof.The high-hardness foamed silicone rubber is prepared from 1-20 parts of hydrogen-containing polysiloxane, 10-70 parts of hydroxyl-terminated polymethylvinylsiloxane, 1-30 parts of a mechanical reinforcing agent, 10-80 parts of a flame retardant and 0.05-0.3 part of a catalyst; the mechanical reinforcing agent is a mixture which simultaneously uses fumed silica, vinyl MQ silicon resin and surface-treated carbon nanotubes, so that the foamed silicone rubber has high hardness and does not increase the density, and meanwhile, by utilizing the shear thickening gel which is filled and adsorbed in the carbon nanotubes, when the foamed silicone rubber material is pressed, the foam silicone rubber material is not easy to deform. According to the present invention, the carbon nano-tube can rapidly harden, such that the originally soft carbon nano-tube can form the skeleton support on the foamed silicone rubber so as to improve the compressive strength and the permanent deformation property of the foamed silicone rubber, such that the foamed silicone rubber material with characteristics of good hardness, low density, excellent compressive strength and excellent resilience can be used for new energy battery support.

The invention relates to the technical field of flame-retardant nylon materials, and provides a halogen-free flame-retardant nylon material and a preparation method thereof, the halogen-free flame-retardant nylon material comprises the following components by mass: 80-120 parts of nylon, 30-40 parts of modified polyacrylate, 1-10 parts of modified nylon, 20-40 parts of a halogen-free flame retardant, and 0.1-5 parts of an auxiliary agent; the modified polyacrylate is a copolymer of phosphorus pentoxide, hydroxyl acrylate, acrylic acid, acrylate, glass fiber and antimony trioxide; the modified nylon is a copolymer of nylon and acrylate. The components have good affinity, a uniform and stable mixed system can be formed, the mechanical strength and flame retardant property of the nylon composite material can be obviously improved by introducing the components, the product is endowed with more excellent comprehensive performance, harm to the environment and human bodies can be avoided, the ecological friendliness is higher, and the nylon composite material is suitable for industrial production. The problems existing in the prior art are solved, and the method has important significance on development and further popularization of nylon products.

The invention discloses a B2-grade flame-retardant PVC (polyvinyl chloride) cable material and a preparation method thereof, and a high-wear-resistance and high-flame-retardant PVC material and a preparation method thereof. The PVC cable material is prepared from the following raw materials in parts by weight: 20-40 parts of polyvinyl chloride resin A, 40-60 parts of polyvinyl chloride resin B, 20-50 parts of a plasticizer A, 15-35 parts of a plasticizer B, 10-25 parts of calcium carbonate, 30-60 parts of a flame retardant A, 15-25 parts of a flame retardant B, 7-10 parts of a stabilizer, 5-10 parts of a carbon forming modifier A, 3-6 parts of a carbon forming modifier B, 2-8 parts of a flexibilizer and 0.5-1 part of a lubricant. According to the B2-grade flame-retardant PVC cable material, on the basis of meeting all requirements of ST2 sheath materials in GB / T12706-2008, a ZB2-YJV223 * 1208.7 / 15kV cable made of the B2-grade flame-retardant PVC cable material can meet the B2-grade combustion requirement in GB31247-2014, and the B2-grade flame-retardant PVC cable material is suitable for cables with the B2-grade flame-retardant requirement and has the advantages of being low in cost, high in cost performance, convenient to produce and extrude, high in production efficiency and the like.

The invention relates to the technical field of environment-friendly plastics, and particularly discloses an environment-friendly self-repairing flame-retardant plastic and a preparation method thereof. The environment-friendly self-repairing flame-retardant plastic is prepared from the following raw materials in parts by mass: 50 to 100 parts of polypropylene, 10 to 30 parts of polylactic acid, 5 to 15 parts of poly (butylene terephthalate)-adipate, 1 to 3 parts of hydroxy cellulose, 5 to 15 parts of diatomite, 1 to 5 parts of graphene oxide, 1 to 2 parts of sodium alginate, 1 to 2 parts of calcium lactate, 0.05 to 0.45 part of glutaraldehyde, 5 to 10 parts of halogen-free flame retardant, 1 to 3 parts of antioxidant and 0.5 to 1.5 parts of heat stabilizer. The flame-retardant plastic disclosed by the invention has the advantages of easily available raw materials, good environmental protection property, capability of being degraded through compost, excellent mechanical strength and self-repairing performance, good heat-resistant stability and flame retardance, simple preparation process and good biodegradability, is suitable for large-scale popularization and application, and has good economic and environmental benefits.

The invention relates to the technical field of composite films, in particular to a flame-retardant composite film and a preparation method thereof. The composite film is of an ABA type symmetrical three-layer co-extrusion structure, and functional division and synergistic interaction are achieved by concentrating a main flame-retardant function on a core layer (B layer) and distributing hydrolysis resistance and mechanical enhancement functions on a surface layer (A layer). The layer A comprises crystalline polyester, reinforcing master batch and an interface reinforcing agent; the layer B comprises crystalline polyester and composite flame-retardant master batch; the preparation method mainly comprises the following steps: respectively preparing the reinforced master batch and the composite flame-retardant master batch; respectively mixing the raw materials of the layer A and the layer B, drying and melting; co-extruding and casting through a three-layer co-extrusion die head with gradient temperature field control, and quenching a cast sheet; and preheating the cast sheet, and then carrying out synchronous two-way stretching, heat setting and cooling rolling. The film prepared by the invention has excellent halogen-free flame retardance, outstanding damp-heat aging resistance and high mechanical strength, and is suitable for the field with strict requirements on safety and durability.

The invention relates to the technical field of halogen-free phosphorus flame-retardant materials, in particular to a halogen-free phosphorus flame-retardant epoxy resin composition and application thereof in a high-heat-resistance copper-clad plate, and the halogen-free phosphorus flame-retardant epoxy resin composition comprises the following raw materials: novolac epoxy resin, a flame retardant, 2-ethyl-4-methylimidazole, a curing agent, fused silicon dioxide and flaky boron nitride. According to the flame retardant, a polyether amine flexible chain segment in a molecular structure of the flame retardant is compatible with an epoxy resin matrix, so that the possibility of phase separation and interface defects is reduced, and the mechanical property level of an epoxy resin cured product is favorably maintained while the flame retardant property is ensured; the epoxy group at the tail end enables the flame retardant to participate in a curing reaction, and is anchored in an epoxy three-dimensional network through a covalent bond, so that the risk of migration and precipitation of the flame retardant is reduced, and the durability and stability of the flame retardant property are ensured.

This invention discloses a fire-retardant substrate containing biomass fibers, an integrated fireproof door core, and its preparation method, belonging to the field of fireproof doors. The fireproof substrate of this invention introduces cellulose fibers into the adhesive layer of an inorganic filler matrix system of magnesium sulfate, magnesium hydroxide, and calcium hydroxide, and incorporates a specific styrene-acrylate copolymer. Simultaneously, the length of the cellulose fibers and the two key inorganic fillers, magnesium sulfate and magnesium hydroxide, are controlled, allowing the three to form a synergistic compatibility and cross-linking effect in the adhesive layer. This effectively optimizes the distribution of the overall components in the adhesive layer. While ensuring the interlayer bonding and flame-retardant performance of the resulting product, the waterproof effect of the adhesive layer is significantly improved without the need for waterproofing or water-absorbing agents. The fireproof substrate has good interlayer connectivity, high regularity, and strong durability. The product does not experience significant performance degradation even after long-term storage or in humid environments.

The utility model provides an expandable square cabin. The expandable square cabin comprises a main cabin body and an expandable cabin, at least one side wall of the main cabin body is provided with a movable turning plate which can be turned and unfolded in the direction away from the main cabin body. A containing body with an inner space is detachably assembled on the movable turning plate, so that the expansion cabin communicated with the main cabin body is formed. According to the expandable square cabin, the movable turning plate and the containing body are arranged, so that the movable turning plate can be unfolded towards the outside of the main cabin body to serve as the floor of the expansion cabin, the expansion cabin connected with the main cabin body is defined by the movable turning plate and the containing body, the use space of the cabin body of the square cabin is expanded conveniently and rapidly, and the use quality of the square cabin is improved; and good usability is realized.

The utility model discloses an antibacterial flame-retardant non-woven fabric which comprises a polyester fiber skeleton base layer, an isolation breathable layer, an antibacterial layer and a flame-retardant layer, air holes are formed in the polyester fiber skeleton base layer; the isolation breathable layer is arranged on the top surface of the polyester fiber skeleton base layer; the antibacterial layer is arranged on the top surface of the isolation breathable layer; the flame-retardant layer is arranged on the top surface of the antibacterial layer. The antibacterial and flame-retardant fabric has good antibacterial and flame-retardant performance, and meanwhile better air permeability can be guaranteed.

The application is a kind of precise forming method for printing magnesium alloy castings by gradient mixing of flame retardant in freeze casting. First, the components of the flame retardant are proportioned, then the shape and layer thickness of the high flame retardant and low flame retardant sand layer in the gradient sand mold are designed according to the structure characteristics of the typical magnesium alloy castings to be poured, and at the same time, the protection gas pipeline is designed in the low flame retardant sand layer combined with the structure of the castings. Subsequently, the control system sprays water binder onto the laid sand powder bed, layer by layer, to complete the preparation of the gradient sand mold. The printed gradient sand mold is frozen, and before pouring, SF6+CO2 protection gas is introduced through the reserved vent pipe, and after a period of aeration, low-temperature pouring is carried out to obtain magnesium alloy castings. The application can reduce the use of flame retardant, prevent explosion reaction with water vapor, reduce production cost, make the freeze casting technology play a role in the production of complex magnesium alloy castings, and meet the development requirements of green casting.

The utility model provides a compacted strand process steel wire rope, which is characterized in that the periphery of the outer-layer steel wire of the central strand is provided with a concave steel wire cambered surface, and the inner-layer strand is tightly twisted on the steel wire cambered surface, so that the steel wire rope can be more tightly twisted, the torsion resistance of the steel wire rope is improved, the steel wire rope can be kept stable under a high-load condition, and the service life of the steel wire rope is prolonged. The risks of loosening and deformation of the steel wire rope are reduced; gaps between the inner-layer strands and the polyamide resin layer are filled with the triangular strands, so that combination in the steel wire rope strands is tighter, the strength of the steel wire rope is guaranteed, the oil storage strands are arranged, grease can infiltrate among the strands of the steel wire rope in the using process, abrasion and corrosion of the steel wire rope can be effectively reduced, and therefore the service life of the steel wire rope is prolonged. Meanwhile, the arrangement of the polyamide resin layer, the protective net layer and the wear-resistant layer also ensures the flame retardance, corrosion resistance and wear resistance of the steel wire rope. Therefore, the design structure is compact, the torsion resistance is excellent, the service life is prolonged, and the structural stability, safety and reliability are achieved.

The present invention discloses an unbonded prestressed steel strand, comprising a plurality of prestressed steel strand bundles, a protective inner sleeve and a protective outer sleeve; the plurality of prestressed steel strand bundles are all arranged in the protective inner sleeve, and the gaps between the prestressed steel strand bundles are filled with an anti-corrosion layer; a plurality of flame retardant strips are evenly distributed along the longitudinal direction of the outer wall of the protective inner sleeve, and adjacent flame retardant strips are arranged closely in sequence without leaving any gaps; the cross section of the flame retardant strip is in a hemispherical shape; and a protective outer sleeve is provided on the outside of the flame retardant strip. The present invention arranges a plurality of flame retardant strips between the protective inner sleeve and the protective outer sleeve, the flame retardant strips can play a flame retardant role, the plurality of flame retardant strips are arranged closely in sequence, the adjacent flame retardant strips can play a role of isolating combustion, and because the cross section of the flame retardant strip is in a hemispherical shape, the flame retardant strips can better fit the outer wall surface of the protective inner sleeve, and at the same time increase the flame retardant area, thereby ensuring the flame retardant performance.

The utility model discloses a polyvinyl chloride (PVC) flame-retardant plastic floor, which relates to the technical field of plastic floors and comprises a plastic floor, a plurality of groups of concave holes distributed at intervals are arranged on the end face of the plastic floor, a sealing cover is mounted in each concave hole, and a grip assisting the sealing cover in moving is fixed at the top end of each sealing cover. An air cavity is formed in the position, located in the plastic floor, below the concave hole, the top end of the air cavity is provided with an inflation hole used for inflating the air cavity, and the bottom end of the air cavity is provided with a sealing film used for sealing the air cavity. By arranging the flame retardant and the air cavity, a large amount of flame retardant can be released when a fire occurs, so that the flame retardant property of the plastic floor is realized, and the fire is effectively restrained.

The utility model discloses a flame-retardant non-woven fabric which comprises a PET (Polyethylene Terephthalate) fiber skeleton base layer, air holes are formed in the PET fiber skeleton base layer; breathable flame-retardant layers are arranged on the two sides of the PET fiber skeleton base layer; an isolation breathable layer is arranged on the surface of the breathable flame-retardant layer; a melt-blown non-woven fabric dust containing layer is arranged on the surface of the breathable isolation layer. According to the utility model, the flame-retardant performance can be ensured, the air permeability is relatively high, and the applicable application field is relatively wide.

The invention discloses a preparation method of a sericin-based bio-based flame retardant and application of the sericin-based bio-based flame retardant to cellulose fabrics, and belongs to the field of textile assistants. The method comprises the following steps: dissolving waste sericin with hydrochloric acid to prepare a bio-based amino acid solution; a boron-containing monomer pentaerythritol diborate is prepared through an organic synthesis reaction, then the boron-containing monomer pentaerythritol diborate and amino in a bio-based amino acid solution are subjected to a substitution reaction to prepare a bio-based flame retardant, the flame-retardant effect is remarkably enhanced through a boron and nitrogen synergistic flame-retardant mechanism, and the flame-retardant cotton fabric which is environmentally friendly, excellent in flame-retardant performance and good in washing resistance is prepared. The preparation method of the flame retardant is simple, convenient and efficient, cyclic utilization of resources is effectively promoted, and the prepared flame-retardant cellulose fabric has wide application prospects in the fields of vehicle interiors, clothes and furniture.

The utility model discloses a control cable with a good fireproof effect, which comprises an outer sheath, a wear-resistant layer, a flame-retardant layer, an outer fireproof layer, an outer shielding layer, a belting layer and an outer filling layer, and is characterized in that a power cable core and a plurality of control cable cores are arranged in the outer filling layer, and each control cable core comprises a first inner sheath, a first inner shielding layer, a first inner fireproof layer and a first conductor; the power cable core comprises a second inner sheath, an inner filling layer, a second inner shielding layer, a second inner fireproof layer and a second conductor. The control cable is provided with the power cable core and the multiple control cable cores arranged around the power cable core in the circumferential array mode, the power cable core is used for power supply, the control cable cores are used for signal control, the multiple shielding layer structures are arranged, the overall shielding performance of the cable is good, interference of internal and external magnetic fields on signal transmission can be prevented, and the service life of the cable is prolonged. And a multi-layer fireproof layer structure is arranged, so that the overall fireproof effect of the cable is good.

The invention discloses an adhesive formula for a copper-clad plate, and particularly relates to the technical field of adhesives, the adhesive formula comprises the following components by mass: 100-150 parts of epoxy resin; 5-15 parts of an imidazole curing agent; 20-40 parts of carboxyl-terminated liquid nitrile rubber; 1 to 4 parts of 3, 4-diaminodiphenyl sulfone; 5 to 15 parts of bismaleimide; 20 to 40 parts of tetrabromobisphenol A high brominated epoxy resin; 10 to 20 parts of phosphorus-containing novolac epoxy resin; 5-10 parts of aluminum hydroxide; 10 to 15 parts of a phosphazene flame retardant; the tetrabromobisphenol A high-brominated epoxy resin can be decomposed at high temperature to generate hydrogen bromide, and the hydrogen bromide can capture free radicals in a combustion chain reaction, so that the combustion process is interrupted, and the flame-retardant effect is achieved. According to the invention, the flame retardance can be improved in multiple ways, and the flame-retardant effect is ensured, so that the flame-retardant coating has higher stability when encountering a flame or high-temperature environment, the bonding firmness of a copper-clad plate is ensured, and the actual use effect is relatively good.

This invention discloses an anti-aging power metering box cabinet material, relating to the field of organic materials technology. The anti-aging power metering box cabinet material comprises the following raw materials by weight percentage: 25%-35% unsaturated polyester resin, 11%-15% low-shrinkage agent, 0.5%-2% initiator, 2.5-8% additives, 35%-50% organic composite filler, and 15%-25% modified chopped glass fiber. This application adds the prepared modified chopped glass fiber to the unsaturated polyester resin, along with the remaining additives required for preparing the electrical cabinet material, to obtain the cabinet material for use in power metering boxes. The power metering box cabinet material prepared in this application has advantages such as excellent mechanical properties, stable environmental aging resistance, low dielectric loss, and low dielectric constant.

The utility model belongs to the technical field of cases and cabinets, and particularly relates to a case and cabinet convenient to assemble and transport, which comprises a bottom frame, folding plates are mounted on the left side and the right side of the bottom frame, retaining doors are mounted on the front side and the rear side of the bottom frame, hinges are mounted on the bottom edges and the top edges of the folding plates, the hinges on the top edges are connected with a top frame, and the top frame is connected with the folding plates. A hinge on the bottom edge is connected to the bottom frame, a locking hinge is installed in the middle of the folding plate, the folding plate comprises a first frame and a box plate, the bottom frame and the top frame are the same devices, the box plate is a double-layer sandwich plate and comprises an inner lining plate and an anti-collision plate, compression springs are installed between the four corners of the inner lining plate and the four corners of the anti-collision plate, and the inner lining plate and the anti-collision plate are hinged to each other. Heat insulation cotton is installed between the inner lining plate and the anti-collision plate, the inner lining plate and the anti-collision plate are flame-retardant macromolecule polyethylene plates, the blocking door comprises a second frame and a maintenance door, rotating shafts are arranged on the left side and the right side of the bottom edge of the second frame, and the device is simple in structure and convenient to use.

The utility model relates to an environment-friendly splicing plate, which belongs to the technical field of furniture plates and comprises a furniture splicing plate, butt joint grooves are arranged on the left side and the right side of the furniture splicing plate, the furniture splicing plate comprises a base plate, a waterproof layer is fixedly connected to the bottom of the base plate, a middle core plate layer is laid on the top of the base plate, and a waterproof layer is laid on the middle core plate layer. And the top of the middle core plate layer is fixedly connected with a flame-retardant layer. According to the environment-friendly assembled board, the waterproof layer formed by the oriented strand boards is arranged, so that the bottom of the furniture assembled board is waterproof, and then the middle core board layer formed by the finger joint boards and the flame-retardant layer formed by the straw-fragrance boards are adopted, so that the flame retardance of the furniture assembled board is guaranteed; the moisture-proof plate layer formed by the bamboo wood fiber plates can effectively prevent moisture from permeating into the furniture splicing plate, and the oak plate is coated with a layer of transparent resin, so that the outer surface of the furniture splicing plate has solid wood grains and is waterproof, and the environment-friendly splicing plate is waterproof, moisture-proof and more attractive.

The utility model relates to the technical field of insulation boards, and discloses an insulation board with a side seam flame retardant function, which comprises a main board and an auxiliary board, a convex board is fixedly arranged on the side wall of the main board, a butt joint groove is arranged on the side wall of the auxiliary board, the inner wall of the auxiliary board is in threaded connection with a fastening bolt, and the fastening bolt is in threaded connection with the main board and the auxiliary board. A sealing assembly is arranged between the main plate and the auxiliary plate. According to the heat preservation plate with the side seam flame retardant function, by arranging the sealing assembly, a plurality of arc-shaped blocks and arc-shaped grooves, a wavy connecting structure is formed in the filling groove, meanwhile, the sealing blocks are inserted into the sealing grooves in a matched mode, and the splicing stability of the main plate and the auxiliary plate is guaranteed in the vertical direction; after flames enter the filling groove, the situation that the connection structure of the main board and the auxiliary board in a large range is damaged rapidly due to the direct influence of the flames is avoided, and the splicing stability and the flame-retardant effect of the main board and the auxiliary board are guaranteed.

The present invention belongs to the field of functional coatings, and specifically relates to a modified melamine coating for household appliances and a preparation method thereof, wherein the modified melamine coating for household appliances comprises the following raw materials in parts by weight: 20-40 parts of polyester acrylate prepolymer; 15-30 parts of modified melamine monomer; 8-15 parts of UV monomer diluent; 2-5 parts of photoinitiator; 0.1-0.4 parts of leveling agent; residual amount of organic solvent; the total amount of the above components is 100 parts. The modified melamine coating for household appliances is obtained through a paint making process, a coating process, and curing. The modified melamine coating for household appliances of the present invention is designed by formula and matched with a homemade modified melamine monomer, which can effectively improve the deficiencies of the coating used for household appliances in the prior art in terms of antistatic, flame retardant and antibacterial effects.

The preparation method comprises the following steps: dissolving pyrophosphoryl chloride and an alkali catalyst in a solvent, controlling the temperature of a reaction system to be 0 DEG C, dropwise adding hydroxybenzaldehyde under mechanical stirring, keeping the temperature at 0 DEG C, reacting for 2 hours, gradually heating to 30 DEG C, continuously reacting for 8-12 hours, after the reaction is finished, pouring a mixture into petroleum ether, and performing suction filtration, washing and drying to obtain the flame-retardant degradable chain extender. The preparation method comprises the following steps: dissolving a tetrafunctional aldehyde group intermediate into a solvent, precipitating, filtering and washing to obtain a tetrafunctional aldehyde group intermediate, dissolving the tetrafunctional aldehyde group intermediate and glycerol into the solvent, reacting under the action of an acid catalyst, cooling to room temperature, pouring a product into a 5% sodium bicarbonate aqueous solution, filtering, washing and drying in vacuum to obtain the flame-retardant degradable chain extender. The flame-retardant degradable chain extender is introduced into the formula, so that the polyurethane foam has excellent flame retardance and degradability at the same time.

The invention relates to a waterproof fender rear sealing plate part for an automobile and a manufacturing method of the waterproof fender rear sealing plate part. The manufacturing method comprises the following steps that (1) a TPU thin film is fixed to an upper mold body of a mold, and the TPU thin film is fixed to a lower mold body of the mold through vacuum adsorption; (2) after the mold is heated, pouring a raw material obtained by mixing polyol and isocyanate into a mold cavity; (3) the mold is closed, the raw materials are foamed, cured and formed in the mold cavity, and a semi-finished product part is obtained; and (4) punching the semi-finished product part to obtain the waterproof fender rear sealing plate part for the automobile. And (3) after the mold is closed for 20-40 seconds, vacuum adsorption of the lower mold to the TPU film is stopped, and after 40-60 seconds, an upper mold puncture needle is started to puncture for multiple times. Compared with the prior art, the waterproof performance of the part can be improved, and the situation that the part is mildewed is reduced.

The invention discloses bio-based flame-retardant polyether polyol and a synthesis method thereof, and relates to the technical field of new chemical materials and biomass utilization. The bio-based flame-retardant polyether polyol is obtained by carrying out arbuzov reaction on halogenated starch liquefied polyol and phosphorous acid triester, and the halogenated starch liquefied polyol is prepared from bio-based starch, a liquefying agent, a halogenated dihydric alcohol liquefying auxiliary agent and a catalyst. The bio-based flame-retardant polyether polyol disclosed by the invention can be directly used for preparing flame-retardant polyurethane foam, the polyurethane foam can show excellent flame-retardant property under the condition of no additional flame retardant, and meanwhile, the optimization of a network structure in the flame-retardant polyurethane foam is also facilitated, so that the flame-retardant polyurethane foam has excellent flame-retardant property. The flame-retardant polyurethane foam with low apparent density and high compression strength can be obtained, and the light weight and the structural stability of the polyurethane foam are further improved.

The invention provides flame-retardant rubber containing a bismuth-based flame retardant and a preparation method of the flame-retardant rubber, and belongs to the technical field of flame-retardant rubber. Natural rubber, nitrile rubber, butadiene styrene rubber and chloroprene rubber are adopted as main base materials, and at least one of bismuth oxide, bismuth oxychloride, bismuth hydroxide and bismuth subcarbonate is introduced as an environment-friendly flame retardant, so that the flame-retardant effect of the product is ensured; meanwhile, the use of complex solvents and the discharge of potential byproducts are reduced, and the method is an important way for realizing ideal green life. Carbon black, stearic acid, zinc oxide, decabromodiphenyl ethane, aluminum diethylphosphinate, diethyl phthalate, paraffin oil, a coupling agent, insoluble sulfur, an accelerant, an anti-aging agent and other substances are also added, and through multiple times of mixing and banburying, the tensile property of the product is guaranteed, meanwhile, the fireproof performance of the product is effectively improved, ignition is delayed, and the flame propagation speed is reduced; and the use safety of the product is improved.