64results about How to "Improve processing fluidity" patented technology

The invention provides a polyester-based composite functional master batch as well as a preparation method and application thereof. The polyester-based composite functional master batch is prepared from the following components in parts by weight: 54 to 100 parts of polyethylene glycol terephthalate-1, 4-cyclohexanedimethanol ester, 4 to 27 parts of a lubricating agent, 0.5 to 2 parts of a compatilizer, 0.5 to 10 parts of a light diffusion agent, 1 to 8 parts of a dispersing agent and 4 to 10 parts of tackifying resin. The polyester-based composite functional master batch provided by the invention is added in the process of processing and forming a polyethylene glycol terephthalate-1, 4-cyclohexanedimethanol ester-based light diffusion plate, so that the flowability and the demolding property can be improved, and the prepared product has excellent light transmittance and haze at the same time.

The invention relates to the field of antistatic PVC (polyvinyl chloride) materials, in particular to a preparation method, a product and application of an antistatic pre-dispersion for a PVC film. The antistatic pre-dispersion for the PVC film is prepared by preparing an antistatic agent from an aminated ionic liquid-CNT compound and carboxylated Mxene, and mixing the antistatic agent with a plasticizer, an auxiliary dispersant and a hyperbranched flow improver. PVC resin and the like can be further combined to prepare a coating, and the coating and base cloth are prepared into a PVC film structure material to serve as an antistatic PVC material. The antistatic pre-dispersion prepared by the invention has good dispersibility in PVC resin, is slightly influenced by environmental temperature / humidity, and has a lasting antistatic effect. Meanwhile, the PVC film structure material prepared by using the antistatic pre-dispersion disclosed by the invention is good in wear resistance, not easy to migrate, stable in performance and relatively long in service life.

The invention discloses a mineral casting prepared based on modified epoxy resin. Diacid is used for modifying epoxy resin to enhance the temperature resistance of the epoxy resin. The compressive strength of the mineral casting and the bonding strength between the epoxy resin and the aggregate are enhanced in a manner of combining the curing agent and post-curing treatment; by adding the dispersed nano silicon dioxide into the epoxy resin, the damping ratio of the mineral casting is effectively improved, and the shock absorption performance of the mineral casting is enhanced.

The invention discloses a flame-retardant antistatic rubber material for a conveying belt and a preparation method of the flame-retardant antistatic rubber material, and relates to the technical field of rubber materials. The rubber material is prepared from the following components: 40-80 parts of chloroprene rubber, 10-40 parts of butadiene rubber, 10-30 parts of high styrene rubber, 20-40 parts of a reinforcing agent, 15-30 parts of an antistatic agent, 10-30 parts of aluminum hydroxide, 10-20 parts of a modified flame retardant, 5-10 parts of polyethylene fibers, 5-10 parts of zinc stearate, 3-6 parts of a coupling agent, 4-8 parts of a vulcanizing agent, 1-3 parts of an accelerant and 1-3 parts of an anti-aging agent. Basic performance is provided through a compounding system of three kinds of rubber, the mechanical performance is improved by adopting an attapulgite-carbon black compounding reinforcing system, and the antistatic and flame-retardant functions are achieved in combination with the antistatic agent and the specially-made modified flame retardant.

The invention discloses extrusion-head in-situ rapid high-crosslinking low-compression permanent deformation conductive silicone rubber and a preparation method thereof. The conductive silicone rubber is prepared from the following raw materials in parts by mass: 100 parts of high vinyl silicone rubber, 2-10 parts of high vinyl silicone oil, 10-30 parts of white carbon black, 150-250 parts of coupling agent modified conductive powder, 2-5 parts of a vulcanizing agent and 1-3 parts of an assistant vulcanizing agent. The plunger type extruder is adopted, the raw materials are extruded and then subjected to in-situ rapid vulcanization forming, the formed conductive silicone rubber is high in crosslinking density and low in compression set, the problem that rubber strips of special-shaped complex structures are prone to collapse and deformation is solved, and the extruded conductive rubber strips do not need to be fed into a vulcanization channel for secondary vulcanization. The conductive rubber strip prepared by the invention has excellent electrical property and electromagnetic shielding effectiveness, and is high in mechanical property, good in rebound resilience and good in processability.

The invention discloses a modified resin composition for a high-pressure-resistant and high-wear-resistant PVC (polyvinyl chloride) hose, and belongs to the technical field of PVC pipes. The sisal fibers are subjected to alkali treatment, impurities are removed and active sites are increased through insertion modification and alkali treatment of the magnesium aluminate spinel fibers, the magnesium aluminate spinel fibers improve the performance of the pipe due to the high length-diameter ratio and other characteristics of the magnesium aluminate spinel fibers, a stable enhanced network structure is formed in a PVC matrix, the surface hardness and wear resistance are improved, the pressure is shared, and the pressure resistance is improved. A bicyclo [2.2. 2] octane structure contained in the long-chain graft modifier disclosed by the invention has rigidity and steric hindrance effect, can uniformly disperse pressure to avoid breakage or excessive deformation of a molecular chain, and is coupled with an amino silane coupling agent to form a three-dimensional structure to improve pressure resistance and wear resistance. After sulfonic groups and a long-chain grafting modifier are introduced to the surfaces of the interspersed modified sisal fibers, the hydrophobic and oleophylic properties of the sisal fibers are improved, the compatibility with PVC is enhanced, agglomeration is avoided, friction is effectively resisted, and the processing fluidity of the material is improved.

The invention provides superfine ground calcium carbonate for a PVC (polyvinyl chloride) cable as well as a preparation method and application thereof, and belongs to the technical field of mineral fillers. The preparation method comprises the following steps: sequentially carrying out primary crushing and secondary crushing on calcite raw ore, carrying out ring roller grinding and primary grading on the obtained crushed material, carrying out ball milling on the obtained ground calcium carbonate powder, a grinding aid, a silane coupling agent and stearic acid, and carrying out secondary grading to obtain the superfine ground calcium carbonate for the PVC cable. The obtained superfine heavy calcium carbonate is small in fineness, high in oil absorption value, high in activation degree and good in processing fluidity and dispersity in the PVC cable preparation process, and the mechanical property and the surface brightness of the prepared PVC cable are improved.

The invention relates to the technical field of environment-friendly materials, in particular to a modified regenerated polyphenyl plastic material and a preparation method thereof. The material is composed of a plurality of novel formula components such as regenerated polyphenyl plastic, hydrogenated SBS, PET-PBS, nano titanium dioxide, an antioxidant 1010, calcium stearate and a phosphorus-containing benzoxazine prepolymer. The preparation method comprises the following steps: synthesizing the novel component, pretreating the regenerated polyphenyl plastic, proportioning, mixing, and carrying out extrusion molding to obtain the product. Through a unique formula and a preparation process, the tensile strength, the impact strength, the thermal deformation temperature, the thermal stability, the flame retardance, the antibacterial property, the fluorescence property and the like of the modified regenerated polyphenyl plastic material are remarkably improved.

The application belongs to the technical field of functional polymer materials, and particularly relates to an antistatic water-absorbing polypropylene-based material and a preparation method and application thereof. The antistatic water-absorbing polypropylene-based material comprises, in mass fraction, 24-33% of polypropylene (PP), 5-20% of a PP-g-X graft copolymer, and 56-63% of a molecular sieve, wherein the molecular sieve is dispersed in a continuous phase composed of the PP and the PP-g-X; X in the PP-g-X graft copolymer represents a polyethylene glycol derivative graft segment, and a grafting rate is 0.2%-0.7%; and the average particle size of the molecular sieve is 1-10 microns. Compared with the prior art, the polyethylene glycol segment in the application has strong hygroscopicity, can actively absorb and fix trace water vapor in the package, has a similar "self-drying" effect, and reduces the internal equilibrium relative humidity of the package; the physical adsorption cavity provided by the molecular sieve and the chemical water absorption of the PP-g-X produce a synergistic effect, provide an ion conduction path for static charges, and improve the antistatic performance.

The invention relates to the technical field of high-performance polymer materials, in particular to low-dielectric and high-temperature-resistant modified cyanate ester resin and a preparation method thereof. Advantages and characteristics of bisphenol A type cyanate ester monomers and bisphenol M type cyanate ester monomers are combined, and the dielectric property and the thermal stability are remarkably improved. Diallyl bisphenol A is introduced as a network structure modifier, the phenolic hydroxyl group of the diallyl bisphenol A adjusts the curing reaction rate, and the allyl and bisphenol A structures of the diallyl bisphenol A finely regulate and control the rigid-flexible balance of a cross-linked network through chemical copolymerization, so that the curing process is controllable and the final network structure is optimized. Meanwhile, a toughening system is innovatively designed, epoxy-terminated liquid nitrile rubber is adopted for toughening, stable micron-scale rubber particles are formed in a resin matrix in a chemical bonding mode, and the fracture toughness is improved. The modified resin has excellent dielectric properties, high heat resistance and a wide process window, and meets the strict requirements of a new generation of low observability aircrafts on a bearing-stealth integrated composite material matrix.

The invention discloses natural cereal and coarse cereal composite nutritional flour and a preparation method thereof, and relates to the technical field of flour preparation, the natural cereal and coarse cereal composite nutritional flour comprises the following raw materials: wheat flour, modified oat flour, modified corn flour, auxiliary coarse cereal flour and silicon dioxide; according to the invention, the modified oat flour is added, and through triple synergistic modification, the solubility and bioavailability of beta-glucan in oat are greatly improved, the water binding capacity and thermal stability of the composite flour are also enhanced, starch retrogradation is effectively inhibited, and the shelf life of a finished product is prolonged; pure physical modification does not have chemical residues, so that the composite flour is suitable for special crowds with diabetes, celiac disease and the like, and the defect that common coarse cereal composite flour is insufficient in functionality is overcome; the modified corn flour is added, the problems that common corn flour is low in dietary fiber solubility and poor in dough stability can be solved, a compact network is formed through synergy of natural polysaccharides, the water holding capacity and processing fluidity of the composite flour are improved, and water loss and caking in the cooking or baking process are reduced.

The invention provides a low-water-absorption glass bead modified PBT (polybutylene terephthalate) material and a preparation method thereof. The low-water-absorption glass bead modified PBT material comprises the following components in parts by weight: 70-100 parts of PBT resin; 0 to 30 parts of solid glass beads; 0-5 parts of a toughening agent; 0-2 parts of an antioxidant; 0-2 parts of a lubricant; 0-2 parts of black color master batch; 0-2 parts of a coupling agent; 0-5 parts of polytetrafluoroethylene wax; wherein the average particle size of the solid glass beads is 1-50 [mu] m; the average particle size of the polytetrafluoroethylene wax is 3-15 [mu] m, and the weight-average molecular weight of the polytetrafluoroethylene wax is 10000-30000 g / mol; the weight ratio of the solid glass beads to the polytetrafluoroethylene wax is (5-10): 1. According to the invention, the polytetrafluoroethylene wax is added into the solid glass bead modified PBT material, so that the shrinkage difference between the material flow direction and the vertical flow direction is effectively reduced, the water absorption rate of the material is remarkably reduced, the preparation process is simple, and the production process is easy to control.

The application discloses an ultrahigh-molecular-weight polyethylene silicon nano wear-resistant composite pipe and a preparation method thereof, and relates to the technical field of ultrahigh-molecular-weight polyethylene composite pipes. The ultrahigh-molecular-weight polyethylene silicon nano wear-resistant composite pipe is prepared from the following raw materials in parts by mass: 70-85 parts of ultrahigh-molecular-weight polyethylene, 5-15 parts of silicon nano particles, 3-6 parts of maleic anhydride grafted polyethylene, 0.1-1.2 parts of a silane coupling agent, 1-3 parts of a wear-resistant reinforcing agent, 0.3-1.5 parts of a lubricant and 0.3-1 part of an antioxidant. The surface of the silicon nano particles is modified by using a specific silane coupling agent, and the silicon nano particles are effectively combined with the ultrahigh-molecular-weight polyethylene matrix, so that the dispersibility of the nano particles in the polymer matrix is solved, and the wear resistance and the mechanical properties of the pipe are remarkably improved.

The invention relates to the technical field of automobile parts, and particularly discloses an anti-oxidation corrosion-resistant automobile air-inlet grille and an electroplating process thereof.The anti-oxidation corrosion-resistant automobile air-inlet grille is prepared from phenoxy-terminated siloxane modified polycarbonate, ABS resin, a modified LDHs antioxidant, a compatilizer ABS-g-MAH and a lubricant ethylene bis stearamide through melt blending, extrusion granulation and injection molding. And a copper layer, a nickel-phosphorus layer and a cobalt-chromium layer are further electroplated and deposited on the automobile air-inlet grille, and the anti-oxidation and corrosion-resistant automobile air-inlet grille is formed.

The invention discloses a weather-resistant and toughened ABS edge banding masterbatch and a preparation method and application thereof. The weather-resistant and toughened ABS edge banding masterbatch comprises the following raw materials in parts by weight: 60-75 parts of chlorinated polyethylene resin; 3-8 parts of stabilizer; 2-5 parts of antioxidant; 2-6 parts of lubricant; 5-15 parts of maleic anhydride grafted EPDM; the stabilizer is composed of a calcium zinc composite stabilizer and a light stabilizer; the lubricant is composed of N,N'ethylene bis stearamide, oxidized polyethylene wax, and stearic acid. The ABS edge banding masterbatch of the invention uses chlorinated polyethylene resin and maleic anhydride grafted EPDM in combination, combined with specific lubricants, stabilizers, and antioxidants to synergistically improve the toughness and weather resistance of the ABS edge banding, so that the modified ABS edge banding has good toughness and good weather resistance.

The application relates to the technical field of high-molecular heat-conducting composite materials, and particularly discloses a low-thermal-resistance grafted modified polyethylene material and a preparation method thereof.The low-thermal-resistance grafted modified polyethylene material comprises polyethylene resin, alpha-olefin ethylene copolymer, polar grafting monomer, initiator, modified sheet-shaped heat-conducting filler, spherical heat-conducting filler, composite antioxidant and functional additive.The modified sheet-shaped heat-conducting filler and the functional additive are compounded and added into a polyethylene matrix through a specific formula, the components interact with each other, the filler agglomeration is effectively inhibited, and the interface combination is strengthened, so that the heat transfer efficiency in the resin is significantly improved under the premise of not excessively increasing the filler amount, the obtained grafted modified polyethylene material successfully breaks through the bottleneck that traditional heat-conducting polyethylene is difficult to simultaneously consider heat conduction, mechanics and processing performance, and finally exhibits the comprehensive characteristics of high heat conductivity, excellent mechanical strength and good melt flowability.

The application belongs to the technical field of polymer composites, and discloses a reversible cross-linking high-thermal-conductivity high-strength flame-retardant PC composite material and a preparation method thereof.The composite material contains, by weight, 100 parts of polycarbonate (PC) resin, 5-25 parts of borate-modified boron nitride (BN), 0.1-1 part of an antioxidant, and 0.1-1 part of an anti-dripping agent, wherein the borate-modified BN is obtained by organic modification of the surface of BN with a borate cross-linking agent.The above raw materials are melt-blended and extruded, and a reversible borate cross-linking network structure is formed through an ester exchange reaction between an o-diol and phenylboronic acid.The thermal conductivity of the composite material is greater than or equal to 1.2 W / (m·K), the vertical burning level is UL94 V-0 (3.2 mm), the tensile strength is greater than or equal to 55 MPa, the bending strength is greater than or equal to 85 MPa, the melt flow rate is greater than or equal to 10 g / 10 min, and the dynamic cross-linking bond is reversible under heating conditions, the material can be recycled and reprocessed, and the green and cyclic manufacturing concept is met, so the composite material is suitable for heat dissipation components in the fields of LED lighting, power adapters, new energy vehicles, 5G communication, etc.

The invention discloses a method for preparing ultra-high molecular weight polyethylene fiber, comprising the following steps: step A: dispersing ultra-high molecular weight polyethylene powder and processing aid in a solvent to obtain a mixed raw material; step B: preheating the mixed raw material and sending it into a twin-screw extruder for spinning to obtain a polyethylene sol colloidal filament bundle; step C: placing the polyethylene sol colloidal filament bundle in cold water for cooling and squeezing out water to obtain a frozen gel filament; step D: pre-stretching the frozen gel filament, placing it in an extractant for extraction at room temperature, and washing, evaporating and drying in sequence after the extraction to obtain an ultra-high molecular weight polyethylene fiber precursor; step E: stretching the ultra-high molecular weight polyethylene fiber precursor to obtain an ultra-high molecular weight polyethylene fiber. The invention can solve the problem of poor fluidity during the current ultra-high molecular weight polyethylene processing, and prepare polyethylene fibers with excellent creep resistance and ideal mechanical properties.

The invention discloses a high-transparency TPU (thermoplastic polyurethane) hot melt adhesive film composition and a production process thereof, and belongs to the technical field of high polymer materials. The composition comprises a TPU matrix, a polymer modifier and the like. The production process comprises the following steps: synthesis of a four-arm star-shaped polymer modifier, vacuum dehydration of raw materials, high-speed mixing, gradient temperature control extrusion granulation, and gradient melting-rapid cooling curtain coating film formation under nitrogen protection. In order to overcome the defects that an existing TPU hot melt adhesive film is insufficient in transparency, poor in bonding durability and prone to migration of a modifier, star topology modifier design and a dual covalent cross-linking synergistic scheme are provided, molecular-level compatibility of the modifier and TPU is achieved, and finally the hot melt adhesive film high in transparency, high in bonding stability and excellent in processing performance is obtained. The method is suitable for high-end scenes such as optical device fitting.

The invention belongs to the technical field of road and bridge paving materials, and discloses an anti-rutting epoxy asphalt toughening additive. The formula comprises the following components in parts by weight: 40 parts of solid epoxy resin, 35 parts of a latent polyester curing agent, 5 parts of an ultra-high molecular weight epoxy toughening agent, 20 parts of a water damage resistant improver, 100 parts of hard asphalt particles, 2 parts of an antioxidant, 5.5 parts of a silane coupling agent, 6 parts of nano silicon dioxide, 0.1 part of a curing accelerator, 0.5 part of a light stabilizer and 1 part of a lubricating separant. In the formula, solid epoxy reacts with a latent polyester curing agent to form a three-dimensional rigid structure, and the three-dimensional rigid structure is matched with oxidized asphalt particles and nano silicon dioxide, so that the high-temperature stability and the pressure resistance are remarkably improved, and ruts are inhibited from the source; the ultra-high molecular weight epoxy flexibilizer can prolong the molecular chain segment of a cross-linking point, and is combined with the curing accelerator to regulate and control the reaction rate, so that the low-temperature crack resistance and fatigue resistance are enhanced while the strength is ensured.

This invention provides a flame-retardant, high-transmittance, and weather-resistant composite material for LED lampshades and its preparation method. By weight, the raw materials include: 80-95 parts bisphenol A type polycarbonate, 4-10 parts phenyl-containing polysiloxane microspheres, 1-4 parts mesoporous silica phosphorus-loaded microspheres, 0.3-0.8 parts silane coupling agent, 0.3-0.8 parts flame retardant, 2-5 parts organic nano-montmorillonite, 0.2-0.6 parts polycarbodiimide, 0.3-0.8 parts antioxidant, 0.3-0.7 parts light stabilizer, and 0.3-1.0 parts lubricant. The flame-retardant, high-transmittance, and weather-resistant composite material for LED lampshades provided by this invention possesses comprehensive properties of high light transmittance, high toughness, and heat resistance.

This invention relates to a biodegradable anti-stick film and its preparation method. The biodegradable anti-stick film comprises a top layer, a middle layer, and a bottom layer arranged sequentially. The top layer comprises polyadipate, polylactic acid, polybutylene butyrate, a compatibilizer, a chain extender, and a dual-antibiotic masterbatch. The middle layer comprises polyadipate, polyglycolic acid, polybutylene butyrate, a compatibilizer, a chain extender, and a dual-antibiotic masterbatch. The bottom layer comprises polyadipate, polylactic acid, polybutylene butyrate, a compatibilizer, a chain extender, and a dual-antibiotic masterbatch. Its advantages lie in the following: adding a compatibilizer to each layer improves the compatibility of the raw materials, thereby reducing the brittleness of the biodegradable anti-stick film; adding PBAT-carrier dual-antibiotic masterbatch to each layer controls the degradation rate of the biodegradable anti-stick film; adjusting the blending ratio of each layer component improves the mechanical properties, processing flowability, and biodegradability of the biodegradable anti-stick film; and coating the top layer with a UV-curable release coating ensures the application requirements of the biodegradable anti-stick film.

This invention relates to the field of polymer materials technology, and discloses a high-elasticity rubber-plastic insulated cable composite material and its preparation method. The high-elasticity rubber-plastic insulation material comprises, by weight, 40-50 parts of EPDM rubber, 20-25 parts of polyolefin elastomer, 30-35 parts of modified calcined kaolin, 3-5 parts of composite antioxidant, 2-3 parts of silane coupling agent, and 1.5-2 parts of vulcanizing agent. During preparation, EPDM rubber and polyolefin elastomer are kneaded for 5-8 minutes, then modified calcined kaolin and silane coupling agent are added and kneaded for another 8-12 minutes, followed by the addition of composite antioxidant and vulcanizing agent and kneading for 3-5 minutes. Finally, the mixture is vulcanized in stages. The first stage vulcanization temperature is 155-160℃, and the second stage vulcanization temperature is 165-170℃. The insulating material prepared by this invention has excellent elasticity, outstanding resistance to flexural fatigue, stable insulation performance, high volume resistivity, excellent aging resistance, and tight interfacial bonding. It is suitable for use in high-voltage cable insulation layers, effectively extending the service life and stability of the cable.

The invention discloses a preparation method of a toughened cellulose / polylactic acid composite material, and belongs to the technical field of polylactic acid toughening, and a toughening agent comprises polylactic acid, maleic anhydride, polyurethane and a bio-based plasticizer. According to the invention, maleic anhydride grafted polylactic acid is used as a composite material flexibilizer main body, a polyurethane polylactic acid block polymer is used as a composite material auxiliary flexibilizer, the flexibility of the composite material is increased through a bio-based plasticizer, and the ductility and processing fluidity of the composite material are improved; therefore, the flexibilizer can be in full contact with cellulose and polylactic acid in the melt blending process, and the toughening effect is improved. The compatibility of cellulose and polylactic acid in the prepared composite material is greatly improved, the problems that the cellulose / polylactic acid composite material is insufficient in toughness and ductility are solved, and the method is simple in preparation process, low in cost and wide in application prospect.

The invention belongs to the technical field of high polymer material modification, and particularly relates to a flame-retardant reinforced plastic tray special material, in particular to a flame-retardant reinforced plastic tray special material for preparing a plastic tray through an injection molding process, and discloses a preparation method of the flame-retardant reinforced plastic tray special material. The invention relates to a special flame-retardant enhanced material for a plastic tray. The special flame-retardant enhanced material is prepared from HDPE (high-density polyethylene) resin, a flame retardant master batch, a polyethylene grafting material, thermosetting epoxy resin, a high-temperature curing agent, a normal-temperature curing agent, a curing accelerator, petroleum resin, talcum powder, a lubricant, an antioxidant and a light stabilizer as raw material systems through melt extrusion and granulation. The special material for the flame-retardant reinforced plastic tray not only has flame retardance, but also has good rigidity and toughness, especially has high elongation at break, and improves the bearing capacity and the application range of a common tray.

The invention relates to the technical field of high polymer materials, in particular to a preparation method of a chlorinated polyvinyl chloride modified material, which is prepared by chlorination of polyvinyl chloride by a chemical grafting method, block of 2-ethylhexyl acrylate and grafting of dodecenyl succinic anhydride. Net-shaped cross-linked block chlorinated polyvinyl chloride prepared by cross-linking acrylonitrile fibers and poly-alpha-methyl styrene through a physical blending method is used, and long-chain fatty acid ester containing active proton pellet groups is grafted on chlorinated paraffin to serve as a main stabilizer. The molecular structure of the obtained chlorinated polyvinyl chloride modified material is more excellent, and the strength, the thermal stability and the heat resistance of the chlorinated polyvinyl chloride modified material are greatly improved; the impact-resistant chlorinated polyvinyl chloride improves the self-defect of poor impact resistance of chlorinated polyvinyl chloride, obviously improves the plasticity, widens the application range, and is especially suitable for preparation of heat-resistant and impact-resistant high polymer material products.

The invention discloses thermoplastic polyamide as well as a preparation method and application thereof, and the preparation method comprises the following steps: mixing a carboxyl monomer, a hydroxyl monomer, 3, 6-dioxa-1, 8-octane dithiol, a catalyst and a solvent, carrying out sulfydryl-olefin click reaction under the protection of inert gas, and carrying out post-treatment to obtain the thermoplastic polyamide, wherein the structural formula of the carboxyl monomer is shown in the specification, and the structural formula of the hydroxyl monomer is shown in the specification; the mass ratio of the carboxyl monomer to the hydroxyl monomer to the 3, 6-dioxa-1, 8-octane dithiol is (9.7 to 14.2) to (1.3 to 5.2) to 5.5. The invention provides high molecular weight bio-based functional polyamide prepared through mercapto click polymerization, the polyamide has reactive side groups including carboxyl and hydroxyl, so that new chemical covalent bonds are formed in the high-temperature processing process, a polymer network is converted from a linear type to a cross-linked type, and further the cementing performance is enhanced.

This invention discloses an organo-bentonite flame retardant synergist and its preparation method, belonging to the field of flame retardant materials technology. The preparation method includes: preparing calcium-based bentonite into a slurry, adding sodium carbonate for sodium purification; subjecting the purified slurry to high-pressure homogenization and flake removal; adding an organic modifier composed of octadecyl quaternary ammonium salt and dioctadecyl quaternary ammonium salt to the flaked slurry for intercalation modification, drying and dispersing; and adding end-functionalized polysiloxane to the organo-bentonite powder for surface coating treatment, thus obtaining the final product. The organo-bentonite flame retardant synergist prepared by this invention has a nanoscale layered structure and excellent compatibility with polyolefin matrices. When this synergist is combined with aluminum hydroxide for use in polyolefin composites, it can reduce processing torque, increase tensile strength, improve the limiting oxygen index to achieve UL-94V-0 rating, and simultaneously promote the formation of a continuous and dense expanded char layer, effectively inhibiting dripping.

This invention relates to the field of cable material technology, and in particular to an antimicrobial adhesion underwater cable sheath material and its preparation and modification process. It comprises the following components in parts by weight: 60-65 parts LLDPE; 10-15 parts PP; 8-12 parts PVDF; 8-12 parts EVA; 0.3-0.5 parts mixed antioxidant; and 0.1-0.3 parts mixed lubricant. This invention utilizes a quaternary blend system of LLDPE, PP, low molecular weight PVDF, and EVA, combined with a highly efficient antioxidant and lubricant, to give the sheath material excellent water resistance, aging resistance, and antimicrobial adhesion properties. After activation by 360° annular plasma under constant pressure, a hydrophilic hydration layer of HEMA and NVP is grafted onto the sheath surface, which effectively inhibits microbial adhesion and biofilm formation, significantly extending the service life of underwater cables.

The invention discloses sec-ethyl phosphate as well as a preparation method and application thereof, and belongs to the technical field of synthesis of flame retardants. Tri (2-ethoxyl) isocyanurate, phosphorus oxychloride and an alcohol compound are used as raw materials, the cyan phosphate is prepared through three-step reaction of preparing phosphoryl chloride diester, refining the phosphoryl chloride diester and synthesizing the cyan phosphate, the molecular structure contains a phosphate group and a triazine ring conjugated structure, and a carbon source, a gas source and an acid source are integrated. The thermal decomposition temperature of the sec phosphate is greater than or equal to 320 DEG C, the UL94V-0 level flame retardant standard can be reached by adding 12%-15% of sec phosphate into a high polymer material, and the sec phosphate has the characteristics of high flame retardant efficiency, good compatibility, strong migration resistance, excellent thermal stability, environmental protection and low toxicity; the synthetic preparation method is stable in process, easy in condition control and high in product purity, can be widely applied to flame-retardant modification of high polymer materials such as polyvinyl chloride, polyurethane and epoxy resin, and has important industrial application value.