36 results about "Halogen free" patented technology

The utility model relates to high polymer material processing equipment technical field, concretely relates to a kind of efficient mixing device of halogen-free engineering plastics carbon black, including double-screw extruder main body and the die head of being installed in the output end of double-screw extruder main body, channel is opened in die head and is communicated with the extrusion cavity of double-screw extruder main body, the top and bottom of die head are all penetrated channel and are equipped with jack, two jacks are jointly inserted with the mounting plate that can slide up and down, several square holes that are equally spaced distribution are penetrated and equipped on the mounting plate, several square holes are all detachably installed with filter screen, several filter screens are all vertical and filled with entire flow channel, by lifting electric cylinder drive mounting plate up and down sliding, different filter screen can be switched in non-stop state, avoid the cumbersome operation of traditional screen change and need to stop die head disassembly, improve production efficiency, multiple square filter screens are vertically arranged, increase filtration area, extend jamming time, suitable for high-filled carbon black formula.

The invention discloses high-temperature halogen-free soldering flux, solder paste and a preparation method. The high-temperature halogen-free soldering flux comprises 30%-50% of a high-boiling-point solvent, 30%-40% of rosin, 1%-8% of modified thermoplastic resin, 5%-10% of an active agent, 0.5%-1.0% of a modified surfactant, 4%-8% of a thixotropic agent, 0.5%-3% of metal salt and 3%-5% of an antioxidant. The solder paste comprises 85%-88% of lead-free metal alloy powder and 12%-15% of high-temperature halogen-free scaling powder. Weighing an organic solvent, adding into a container, and heating to 80-95 DEG C; adding the thixotropic agent and uniformly stirring; the temperature is reduced to 60-70 DEG C, rosin, modified thermoplastic resin, an active agent, metal salt, an antioxidant and a modified surfactant are weighed and added, constant-temperature stirring is conducted till dissolution is achieved, bubbles in the scaling powder are discharged, the scaling powder is taken out and cooled into paste, the materials are ground, and the high-temperature halogen-free scaling powder is obtained.

There is provided a technique that includes: supplying a film formation inhibition gas to the substrate, which includes a first base and a second base on a surface of the substrate, to form a film formation inhibition layer on a surface of the first base; supplying a film-forming gas to the substrate after forming the film formation inhibition layer on the surface of the first base, to form a film on a surface of the second base; and supplying a halogen-free substance, which chemically reacts with the film formation inhibition layer and the film, to the substrate after forming the film on the surface of the second base, in a non-plasma atmosphere.

The invention relates to the field of flame-retardant modified polyolefin master batch materials, in particular to a halogen-free flame-retardant master batch as well as a preparation method and application thereof. The halogen-free flame-retardant master batch is prepared from carrier resin, a halogen-free flame-retardant system, a coupling-dispersing composite additive, a small amount of antioxidant, a small amount of lubricant and a small amount of nucleating agent, and the creativity of the halogen-free flame-retardant master batch can be expanded and highlighted through the synthesis direction of epoxy acrylic resin. A halogen-free flame-retardant system formed by surface activation of aluminum diethylhypophosphite, coating of ammonium polyphosphate microcapsules, nano layered barrier modification of montmorillonite and matching of melamine polyphosphate can be uniformly distributed in carrier resin, and the flame-retardant protection performance of a plastic product can be effectively improved under the condition of low filling amount; the method is simple in process, low in energy consumption and suitable for flame-retardant modification of films, fibers, injection molding products and extruded products.

The invention discloses an epoxy adhesive for an IC (integrated circuit) packaging box dam and a preparation method of the epoxy adhesive. The epoxy adhesive comprises the following raw material components in percentage by mass: 7.5-10% of epoxy resin; 10 to 15% of polycarbonate polyol; 10-15% of an active epoxy toughening agent; 0.5-1.0% of a curing agent; 1-3% of a silane coupling agent; 1-3% of an inorganic thixotropic agent; and 60-70% of a spherical silicon dioxide filler. By adopting the raw material components with specific types and contents, the adhesive with higher Tg and lower CTE can be obtained, and the adhesive is suitable for high-frequency / high-temperature application (such as an automobile radar chip); the halogen-free and low-volatility (VOC) formula conforms to the European Union RoHS / REACH regulations; moreover, the adhesive can meet the properties of high adhesion, low stress, rapid curing and the like, and can meet the long-term aging property (such as 85 DEG C / 85% RH (Ruhrstahl Heraeus) test).

The utility model relates to the technical field of synthetic leather, and discloses flame-retardant environment-friendly synthetic leather, which comprises synthetic leather base cloth, a water-based flame retardant coating, a solvent-free polyurethane layer, a polyurethane middle layer and a polyurethane surface layer, the solvent-free polyurethane layer is attached to the upper end face of the water-based flame retardant coating, the polyurethane middle layer is smeared on the upper end face of the solvent-free polyurethane layer, and the polyurethane surface layer is arranged on the upper end face of the polyurethane middle layer in a blade coating mode. According to the flame-retardant environment-friendly synthetic leather, the addition of organic solvents is greatly reduced from the raw materials and the formula, so that the harm of the organic solvents to the health of workers in the production process is reduced, almost half of human resources are saved, and the used flame retardant is also an environment-friendly halogen-free flame retardant, so that the harm to human bodies is smaller, and the flame-retardant effect is better.

This invention provides a method for preparing a halogen-free PETG label film, belonging to the field of label film preparation technology. The method includes: corona treatment of a PETG substrate layer; coating the substrate surface with a halogen-free functional coating liquid containing waterborne polyurethane acrylic composite resin, nano-inorganic modifier, and crosslinking agent; bonding the coated substrate layer and the halogen-free adhesive layer together and then sending them into a curing oven, where the functional coating and the interlayer bonding with the adhesive layer are simultaneously completed under segmented programmed temperature rise conditions, resulting in physical entanglement and chemical crosslinking at the interface; and finally, cooling and shaping to obtain the label film. This invention significantly enhances the interlayer bonding strength through a simultaneous curing and composite process. The resulting product has a light transmittance ≥91%, haze ≤2.5%, peel strength ≥8N / 25mm, and performance retention ≥90% after damp heat aging. Furthermore, the chlorine and bromine content are both ≤900ppm, meeting the halogen-free standard.

Currently, due to their inherent flammability, polyurethane reinforcement grouting materials for coal mines typically incorporate halogen-containing flame retardants during their preparation to enhance their flame-retardant properties. However, polyurethane materials containing these flame retardants remain in the finished coal, potentially causing catalyst poisoning in coal chemical production. Furthermore, halogen-containing flame retardants exhibit high smoke production and highly toxic fumes when exposed to open flames, posing a significant risk of injury to personnel. This invention addresses these drawbacks by adding our company's DMMP microcapsules and powder dispersant to the system and adjusting the formulation, thus preparing a halogen-free polyurethane reinforcement material for reinforcing coal and rock masses in coal mines. This material overcomes the aforementioned drawbacks and possesses significant practical application value.

The invention discloses a fireproof shielding instrument cable and a production process thereof, and belongs to the technical field of cable manufacturing, and the cable comprises a conductor layer, a fireproof layer, an insulating layer, a sub-shielding layer, a cabling filling layer, a total shielding layer and an outer sheath layer from inside to outside; the conductor layer is a carbon nanotube copper alloy conductor, the fireproof layer is a double-sided plastic-coated water glass calcined mica tape, the sub-shielding layer and the total shielding layer are of a composite structure of weaving, a fireproof coating and a copper tape, and the outer sheath layer is of a ceramic silicone rubber and modified polyether-ether-ketone double-sheath structure. The production process comprises the steps of conductor preparation, sequential forming of each layer, cabling filling, shielding, sheath extrusion and the like. The cable can resist the temperature of 1000-1200 DEG C, has a multi-layer fireproof shielding effect, is high in structural reliability, is halogen-free from all materials, has the service life exceeding 30 years, is suitable for instrument signal transmission and power transmission in fireproof places, and solves the problem that the existing cable is easy to lose efficacy in an extreme environment.

The invention discloses an epoxy asphalt reaction type phosphorus-silicon flame retardant, epoxy asphalt concrete and a preparation method of the epoxy asphalt reaction type phosphorus-silicon flame retardant. The epoxy asphalt reactive phosphorus-silicon flame retardant contains a diepoxy group and a phosphorus-silicon synergistic skeleton, so that the limit oxygen index of epoxy asphalt can be greatly improved, meanwhile, good mechanical properties are kept, and the migration rate of the flame retardant is reduced. Compared with the existing reaction type phosphorus-silicon flame retardant, the phosphorus-silicon flame retardant has better flame retardant property, is used for preparing epoxy asphalt concrete, not only improves the flame retardant property, but also can further improve the mechanical property and pavement performance of the asphalt concrete, and is suitable for traffic infrastructure, building municipal engineering, special industrial facilities and other key scenes. According to the method, the silane coupling agent hydrolysate and the alkyl phosphate are subjected to phosphorylation reaction, then epoxy chloropropane is used for blocking, the preparation process is simple, no halogen or heavy metal participates in the preparation process, and the method conforms to European Union REACH regulations and domestic low-toxicity and low-harm building material standards.

The invention discloses a halogen-free flame-retardant bio-based polyhydroxy compound, a preparation method of the halogen-free flame-retardant bio-based polyhydroxy compound and application of a grounding anti-corrosion coating, and belongs to the technical field of grounding anti-corrosion materials. A P-containing structure in the polyhydroxy compound and an N element can form a synergistic flame-retardant effect, so that the polyhydroxy compound can be added into an epoxy resin system as a flame retardant. In addition, the epoxy resin system with flame-retardant, conductive and anti-corrosion properties provided by the invention comprises the following components: epoxy resin, polyaniline modified epoxy resin, a diluent, pretreated graphene, a curing agent, a flame retardant and simethicone, the flame retardant comprises the halogen-free flame-retardant bio-based polyhydroxy compound. The system has good flame-retardant, conductive and anti-corrosion performance when being applied to a grounding body of an electric power system.

The application discloses an epoxy asphalt reactive phosphorus-silicon flame retardant, an epoxy asphalt concrete and a preparation method thereof. The epoxy asphalt reactive phosphorus-silicon flame retardant contains a double epoxy group and a phosphorus-silicon synergistic skeleton, can greatly improve the limiting oxygen index of the epoxy asphalt, maintains good mechanical properties, and reduces the migration rate of the flame retardant. Compared with existing reactive phosphorus-silicon flame retardants, the epoxy asphalt reactive phosphorus-silicon flame retardant has better flame retardant performance, is used for preparing the epoxy asphalt concrete, improves the flame retardant performance of the epoxy asphalt concrete, and further improves the mechanical properties and road performance of the asphalt concrete, and is suitable for key scenes such as traffic infrastructure, building municipal engineering and special industrial facilities. The epoxy asphalt reactive phosphorus-silicon flame retardant is prepared through a phosphorylation reaction of a silane coupling agent hydrolysis product and an alkyl phosphate, and then end-capped by epoxy chloropropane, the preparation process is simple, no halogen and heavy metal are involved, and the epoxy asphalt reactive phosphorus-silicon flame retardant meets the EU REACH regulation and the domestic 'low toxicity and low harm' building material standard.

The application relates to the technical field of catalyst preparation, and particularly discloses a preparation method of a high-crosslinking polymer / SiO2 aerogel composite material and application thereof. A kind of aluminum-doped silica aerogel is synthesized by selecting solid waste coal gangue as a silicon source and adopting a sol-gel method. Further, in the presence of SiO2 aerogel, a high-crosslinking polymer is in-situ loaded through a Friedel-Crafts alkylation reaction to obtain a high-crosslinking polymer / SiO2 aerogel composite material. The prepared HCPs@SiO2 composite material has the characteristics of halogen-free, large specific surface area, wide pore size distribution and the like. As a halogen-free catalyst, the composite material exhibits excellent catalytic activity and cycle stability in the cycloaddition reaction of CO2 and epoxide, the environmental-friendly characteristics avoid the toxicity residue and corrosion risk of a traditional halogen-containing system, meanwhile, the product post-processing process is simplified, and the composite material shows significant potential in industrial-scale application.

Embodiments in accordance with the present invention encompass compositions containing a polymer blend formed from a high molecular weight polymer and a low molecular weight polymer where the polymers are formed from a variety of polycycloolefinic monomers at least one of which polymer is formed from a monomer containing an epoxy functional group, melamine, fillers such as hexagonal boron nitride or silica, a crosslinker, a free radical initiator, a tackifier and one or more suitable additives. The compositions of this invention can be formed into a variety of three-dimensional insulating articles upon exposure to suitable high temperature, such as for example films. The objects formed from the compositions of this invention exhibit hitherto unattainable low dielectric constant and low-loss properties, fire-retardancy and very high thermal properties. The compositions of this invention are useful in various applications, including as insulating materials in millimeter wave radar antennas, among others. The films formed from the compositions of this invention exhibit a UL-94 rating of at least V-1, dielectric constant (Dk) less than 2.8 and dielectric dissipation factor (Df) of less than 0.002.

A composition and method for reducing the coefficient of friction and required pulling force of a wire or cable are provided. A composition of aqueous emulsion is provided that is environmentally friendly, halogen free and solvent free. The composition is compatible with various types of insulating materials and may be applied after the wire or cable is cooled and also by spraying or submerging the wire or cable in a bath. The composition contains lubricating agents that provide lower coefficient of friction for wire or cable installation and continuous wire or cable surface lubrication thereafter.

The present invention relates to a process for producing rigid polyurethane foams or rigid polyisocyanurate foams, comprising the reaction of at least one polyisocyanate (A) and a specific polyol component, wherein the flame retardants used are selected such that the phosphorus content, based on the sum of the components used, is less than or equal to 1% by weight. The present invention further relates to the polyol component as described and to rigid polyurethane foams or rigid polyisocyanurate foams obtainable or obtained by a process of the invention, and to the use of a rigid polyurethane foam or rigid polyisocyanurate foam of the invention for production of sandwich elements.

This invention relates to polyamide compositions, methods for manufacturing the same, and molded articles. The invention provides a polyamide composition capable of producing molded articles containing a halogen-free flame retardant and exhibiting good flame retardancy and long-term heat resistance, as well as a method for manufacturing the same. A polyamide composition comprises (A) a polyamide, (B) a phosphorus-containing flame retardant, and (C) a styrene copolymer, wherein the content of the (C) styrene copolymer is 0.1% by mass or more and 7.0% by mass or less relative to the total mass of the (A) polyamide, the (B) phosphorus-containing flame retardant, and the (C) styrene copolymer. The method for manufacturing the polyamide composition is a method for manufacturing the above-mentioned polyamide composition, wherein the raw material components containing the (A) polyamide, the (B) phosphorus-containing flame retardant, and the (C) styrene copolymer are melt-blended.

Embodiments in accordance with the present invention encompass compositions containing the polymer formed from a variety of polycycloolefinic monomers at least one of which monomer contains an additional unpolymerized ethylenic bond, melamine, fillers such as hexagonal boron nitride or silica, a crosslinker, a free radical initiator, a tackifier and one or more suitable additives. The compositions of this invention can be formed into a variety of three-dimensional insulating articles upon exposure to suitable high temperature, such as for example films. The objects formed from the compositions of this invention exhibit hitherto unattainable low dielectric constant and low-loss properties, fire-retardancy and very high thermal properties. The compositions of this invention are useful in various applications, including as insulating materials in millimeter wave radar antennas, among others. The films formed from the compositions of this invention exhibit a UL-94 rating of at least V-1, dielectric constant (Dk) less than 2.8 and dielectric dissipation factor (Df) of less than 0.002.

The present disclosure relates to a halogen-free flame retardant composition including (A) at least 65 wt.% of an aromatic polycarbonate, (B) at least 0.07 wt.% of a sulfonated phosphazene, and (C) optionally a siloxane. The halogen-free flame retardant composition may be used to form various articles with improved retardancy properties.

The present invention relates to a hollow cathode plasma polymerization process applied to a textile substrate, in particular to a process for applying to a textile substrate a halogen-free, in particular fluorine-free, water repellent polymer coating, in particular a durable water repellent coating, and to products obtainable by such processes and systems.

This invention discloses a ventilated, intumescent fireproof material, its preparation method, and its application. The material comprises component A and component B. Component A includes 80-120 parts hydroxyl silicone oil, 40-80 parts sodium silicate, 0.5-1.5 parts sodium bicarbonate, 2-10 parts expanded graphite, 10-25 parts magnesium hydroxide, 10-15 parts ammonium polyphosphate, 5-10 parts reinforcing filler, and 10-15 parts dimethyl silicone oil. Component B includes 5-10 parts curing agent, 1-4 parts silane coupling agent, and 0.03-0.07 parts organotin catalyst. This material can precisely initiate expansion at 100-110℃ while maintaining good ventilation and heat dissipation performance under normal conditions. It also possesses radiation resistance, DBA test resistance, halogen-free properties, and long lifespan, meeting the requirements for fire integrity, ventilation, heat dissipation, and long-term stability in nuclear power plant cable tray covering and fireproofing systems.

The present invention provides a novel halogen-free flame retardant (HFFR) post consumer recovery (PCR) derived polymer composition suitable for use in a flame retardant layer of an electric wire or cable, preferably as a flame retardant sheath layer, comprising 10.0 to 45.0 wt% of a specific thermoplastic PCR polymer comprising a high density polyethylene (HDPE) polymer, and excellent mechanical performance, flame retardance and safety performance are shown.

The invention discloses a high-reliability water-based low-solid soldering flux for electronic welding and a preparation method of the high-reliability water-based low-solid soldering flux. The soldering flux is prepared from the following raw materials: 1.80 to 4.00 w percent of organic acid, 0.50 to 0.80 w percent of organic amine, 0.13 to 0.22 w percent of halogen-containing activity enhancer, 0.40 to 0.80 w percent of halogen-free activity enhancer, 0.10 to 0.20 w percent of surfactant, 0.50 to 0.80 w percent of film-forming agent, 0.30 to 0.50 w percent of antioxidant, 0.20 to 0.50 w percent of corrosion inhibitor, 6.00 to 10.00 w percent of cosolvent and the balance of deionized water. The soldering flux has the characteristics of high reliability, low solid content, no halogen and low corrosion, has the characteristics of high welding activity, bright welding spots, no halogen residue, low solid content and extremely few residues after welding and does not need to be cleaned, and is particularly suitable for welding scenes with extremely high requirements on cleanliness and reliability.

The utility model relates to the technical field of power cables, and discloses a medium-voltage cross-linked polyethylene insulated anti-termite low-smoke halogen-free sheath nylon protection layer power cable, which comprises a conductor, a conductor shield is fixedly arranged on the outer side of the conductor, an insulator is fixedly arranged on the outer side of the conductor shield, an insulation shield is fixedly arranged on the outer side of the insulator, and a nylon protection layer is fixedly arranged on the outer side of the insulation shield. The semi-conductive nylon tape is fixedly arranged on the outer side of the insulation shield, the metal shield is fixedly arranged on the outer side of the semi-conductive nylon tape, the halogen-free low-smoke wrapping tape is fixedly arranged on the outer side of the metal shield, the inner sheath is fixedly arranged on the outer side of the halogen-free low-smoke wrapping tape, and the aluminum wire armor is fixedly arranged on the outer side of the inner sheath. According to the medium-voltage cross-linked polyethylene insulated anti-termite low-smoke halogen-free sheath nylon protection layer power cable and the production equipment, through the unique cable structure design, such as the arrangement of the outer nylon sheath and the semi-conductive nylon tape, the biting of animals such as termites and the like is effectively prevented, and the durability of the cable in a complex environment is improved.

A semiconductor processing method may include providing a hydrogen-containing precursor to a processing area in a semiconductor processing chamber. A substrate may be placed on a substrate support within the processing area. A layer of a material containing silicon and nitrogen may be placed on the substrate. The method may include forming a plasma emission of the hydrogen-containing precursor. The method may include bringing the layer of the silicon and nitrogen-containing material into contact with the plasma emission of the hydrogen-containing precursor. This contact may etch a portion of the layer of the silicon and nitrogen-containing material.

The invention provides halogen-free conductive silver paste special for touch screen laser etching and a preparation method of the halogen-free conductive silver paste, and relates to the technical field of electronic paste. The halogen-free conductive silver paste special for touch screen laser etching comprises the following raw materials in parts by weight: 75-85 parts of conductive silver powder, 8-12 parts of a polymer bonding substance, 4-7 parts of a solvent, 1.5-3 parts of a curing agent, 1-3 parts of an auxiliary agent and 0.1-0.3 part of a laser absorbent. Halogen-containing resin is replaced by bisphenol A epoxy resin, acrylic resin and aldehyde ketone resin, and halogen-free design is adopted; through the synergistic effect of the nano silver powder and the laser absorbent, the laser absorbent effectively absorbs laser energy and converts the laser energy into energy of other forms, the edge burr rate is obviously reduced, and the etching line width is enabled to be lt; the square resistance value fluctuation of the line after laser etching is lt; and 5%, the high-precision requirement of the touch screen is met.

The application discloses a kind of halogen-free bio-based flame-retardant polyester polyols, by sik and monobasic acid, dibasic acid mixed preparation, using the cyclic structure of sik and its three functional degree hydroxyl structure can prepare the crosslinking degree moderate polyester polyols, the flame-retardant polyester polyols prepared in V-0 grade flame-retardant test shows excellent, also reduce the dependence on toxic flame retardant;In addition, the cyclic structure of sik and high nitrogen content help material form more dense crosslinking network after forming, give material better tensile strength and heat resistance, mechanical properties and flame-retardant effect are considered simultaneously.Part of trimethylolpropane can be used to replace sik, and cost and performance are considered.The application also provides an application of halogen-free bio-based flame-retardant polyester polyols, which is mixed with isocyanate to prepare polyurethane material.

The invention relates to a flame-retardant polypropylene composition comprising (A) 40-60 wt% of a polypropylene-based polymer, (B) 20-40 wt% of an intumescent halogen free flame retardant, and (C) 11-30 wt% of an uncoated mineral filler with a particle size of 5 µm or more, a process for the preparation of said polypropylene composition, and an article comprising said polypropylene composition.

The present disclosure relates to a halogen-free flame retardant composition including (A) at least 5 wt.% of a linear aromatic polycarbonate, (B) at least 0.01 wt.% of a sulfonated phosphazene, (C) at least 1.0 wt.% of a branched aromatic polycarbonate, and optionally, (D) a siloxane where the wt.% is based on the total weight of the halogen-free flame retardant composition. The halogen- free flame retardant composition may be used to form different articles with improved flame retardancy and anti-drip performance.