Method for preparing powder paint polyesters by discarded polyester decomposing and reclamation

The invention discloses a method of preparing the polyester used for powder paint by decomposing and recycling the waste polyethylene terephthalate; wherein, the waste polyethylene terephthalate, dihydric alcohol and zinc acetate catalyst are put into a reactor in proper proportion, and are mixed evenly by an electric mixer at the rate of 30 to 500 r/min, and then put into an infra-red heating container and heated for 0 to 1 hour under the temperature of 190 DEG C to 260 DEG C and then put into a micro-wave oven, and heated for 0 to 15 minutes under the power of 500 to 2000 W; subsequently, such polyatomic acids as adipic acid or terephthalic acid as well as esterifying catalyst antimony trioxide are added in the depolymerized products according to the proportion and esterification polycondensation is conducted in the micro-wave oven for 0 to 10 minutes to generate the polyester used for powder paint. By making use of waste polyester to prepare the polyster used for powder paint, the invention ...

Medical micro porouse chitoglycan asymmetric film and preparation method thereof

The present invention relates to a medical microporous chitosan unsymmetrical membrane with micropores which can be passed through said membranous layer, and formed into cone form on both surfaces ofsaid membrane, and their pore sizes are different. Said membrane contains (wt%) 85-95% of chitosan and 5-15% of glycerine, and its preparation method includes 1). dissolving chitosan in 2% acetic acid solution to obtain chitosan acetic acid solution whose concentration is 1-2%, adding glycerine, filtering, standing still and defoaming, and injecting said solution into mould; 2). making anhydrous alcohol, glycerine and sodium hydroxide according to the ratio of 1000:50-100:10-20 into solidifying liquor, placing the mould in solidifying liquor to make solidification, taking out and obtaining a white gel; and 3). drying the gel in over with 50-70 deg.C.

Environment-friendly flame-resistant ABS resin

The invention discloses an environment-friendly flame-resistant ABS resin, which comprises the following components by weight percentage: 72 percent to 84 percent of ABS resin granules, 15 percent to 22 percent of PDSPB expanding type flame retardant, 0.7 percent to 4.5 percent of montmorillonite, 0.1 percent to 0.5 percent of anti-oxidant agent, 0.1 percent to 0.5 percent of anti-dripping agent and 0.1 percent to 0.5 percent of lubricant. The flame-resistant ABS resin does not contain harmful substances of lead, mercury, cadmium, hexavalent chrome, polybrominated biphenyls, polybrominated diphenyl ethers and the like, and meets the requirements of RoHS instruction about innocuity and environmental protection. The montmorillonite/PDSPB synergistic flame-resistant ABS resin not only can guarantee the flame-resistant performance, but also can keep good mechanical performance, can completely or partially replace the flame-resistant ABS resin of the traditional halogenated flame retardant and ...

Nano clay compounded flame-retardant ABS resin

The invention discloses nano clay compounded flame-retardant ABS resin, which is prepared by blending the following components in part by weight: 40 to 60 parts of acrylonitrile butadiene-styrene (ABS), 20 to 30 parts of compound flame retardant, 1 to 5 parts of nano clay, 3 to 10 parts of compatilizer, 10 to 30 parts of toughening agent and 0.1 to 2 parts of antioxidant. A preparation method comprises the following steps of: weighing the raw materials according to a ratio in the formula, premixing the ABS and the nano clay in a medium speed mixer for 2 to 5 minutes, adding other raw materials, and mixing for 5 to 10 minutes; and putting the mixed raw materials into a double screw extrusion machine, performing melt extrusion and granulation to obtain the nano clay compounded flame-retardant ABS resin. The resin can reach UL94-V0 class, has stable machinability and mechanical properties, ensures that the micromolecular flame retardant does not seep in the using process, is environment-friendly ...

Flame retardant polypropylene composite compounded by layered thermometal hydroxide and intumescent flame retardant and preparation method of flame retardant polypropylene composite

The invention discloses a flame retardant polypropylene composite compounded by layered thermometal hydroxide and an intumescent flame retardant and a preparation method of the flame retardant polypropylene composite. The flame retardant polypropylene composite comprises the following components in percentage by weight: 60-73 percent of polypropylene, 23-33 percent of intumescent flame retardant, 1-2 percent of layered thermometal hydroxide and 3-7 percent of bulking agent. The flame retardant polypropylene composite compounded by the layered thermometal hydroxide and the intumescent flame retardant is excellent in heat stability, does not contain harmful substances such as lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyl and polyborminated diphenyl ethers, is low in calorific value and fuming value in the combustion process, is harmless to the environment and a human body and also has good physical and mechanical properties and processability.

Polymer grafted carbon nano-tubes and preparing method thereof

The invention discloses polymer grafted carbon nano-tubes and a preparing method thereof. The method comprises the steps that: monomer vinyl phosphoric acid and carbon nano-tubes are added into dimethylacetamide, and ultrasonic treatment is performed; under the protection of nitrogen, azodiisobutyronitrile is added for initiating reactions, and the ultrasonic treatment is continuously performed; a reaction device is transferred into oil bath, and the temperature is controlled until the reaction is finished, so that polymer grafted carbon nano-tubes are obtained. The preparing method provided by the invention has the advantages of reasonable process and simple reaction operation, and is capable of obviously improving the dispersity of carbon nano-tubes in water. The polymer grafted carbon nanometer tube has a structure defined in the description.

Filtering device, cone calorimeter and method for analyzing flue gas particles

The invention provides a filtering device, a cone calorimeter and a method for analyzing flue gas particles, the filtering device is used for selectively filtering the flue gas particles released by material combustion in the testing process of the cone calorimeter, and the filtering device is installed between a sampler and a filter in a flue gas pipeline of the cone calorimeter; the filtering device comprises a filtering barrel, and a first filtering structure and a second filtering structure which are arranged on the filtering barrel; flue gas particles are filtered through the first filtering structure and the second filtering structure in sequence. Wherein the first filtering structure is used for filtering flue gas particles with the diameter larger than the first diameter in the flue gas particles; the second filtering structure is used for filtering smoke particles with the smoke particle diameter not smaller than the second diameter, and the second diameter is smaller than the ...

一种高韧性聚苯乙烯合金及制备工艺

... 本发明公开了一种高韧性聚苯乙烯合金及制备工艺。采用聚苯乙烯、乙烯共聚物、增容剂、稳定剂、加工助剂、填料为原料，按配比将原料用高速搅拌机搅拌10min左右直至混匀，后转入双螺杆挤出机中熔融挤出，料筒温度为：后段160-180℃，中段170-200℃，前段180-205℃；模头温度190-205℃，机头压力：3-6MPa，挤出后冷却、造粒即可制得乳白色圆柱状颗粒的产品。本发明的合金材料制备方法简单、成本低廉、综合性能优良，其中韧性远高于HIPS，可以完全或部分替代HIPS和ABS，适于工业化，具有广泛的市场前景。 ...

Safety type sealed venous detaining needle

The invention relates to a safe sealed vein needle, which engages the puncture needle tube with the retrain tube, wherein, the tail of retrain tube is connected with the tube base. The invention is characterized in that the tail chamber of retrain tube contains a safe device, comprising a needle sharp safe cap whose inner side contacts the puncture needle tube, a bottom plate sliding sheathed on the puncture needle tube while its circumference contacts the inner side of tube, a flexible arm in suspended state while its front end is connected with the outer side of safe cap and the flexible arm functions on the safe cap whose retrain force is toward to the puncture needle tube when the tail uses bottom plate as base, a bottom plate anti-drop clamper at the front of puncture needle tube while relative to the position that the bottom plate at the anti-drop clamper the puncture needle is clamped into the safe cap. The invention can automatically protect the puncture needle tube when the puncture ...

Compounds containing phosphorus, nitrogen and transition metal elements, and preparation method thereof

The invention discloses compounds containing phosphorus, nitrogen and transition metal elements. The compounds with the structure also contain transition metal with a catalytic flame-retardant effect besides phosphorus and nitrogen elements required in the traditional flame retardant. A method for preparing the compounds with the structure is simple; and the obtained product has higher yield, does not contain halogen, is environment-friendly, has high thermal decomposition temperature, and can be used for flame-retardant engineering plastic. A general structural formula of the compounds is shown in the following formula (I).

CNT(carbon nano tube)-bridged rare-earth phenylphosphonate compounded decabromodiphenylethane flame-retardant polyethylene and preparation method thereof

The invention discloses a kind of CNT(carbon nano tube)-bridged rare-earth phenylphosphonate compounded decabromodiphenylethane flame-retardant polyethylene and a preparation method thereof. The CNT-bridged rare-earth phenylphosphonate compounded decabromodiphenylethane flame-retardant polyethylene is characterized by being prepared from the following components in parts by weight: 60-100 parts of polyethylene, 5-15 parts of a bromine-series flame retardant, and 1-5 parts of CNT-bridged rare-earth phenylphosphonate. A CNT-bridged rare-earth phenylphosphonate hybrid prepared according to the invention simultaneously has lamellar and tubular structures, a CNT achieves an effect of connecting a rare-earth phenylphosphonate lamella, and the CNT and the rare-earth phenylphosphonate lamella are dispersed relatively uniformly and have no obvious clustering phenomenon; the flame retardant property of the material can be obviously improved just through adding a small amount of a bridging hybrid, ...

High-density polycthylene grafted acryhic material and preparation method thereof

The present invention discloses a high-density polyethylene grafted acrylic acid material, and its preparation method. Said preparation method includes the following steps: adopting high-density polyethylene (HDPE), acrylic acid (AA) and initiator according to a certain mixing ratio, using Haake rheometer to comix them for 20 min. at 160 deg.C, its screw rotating speed is 60 rpm, after the above-mentioned materials are molten and comixed, the invented polyethylene graft acrylic acid can be obtained.

Nano clay compounded flame-retardant ABS resin

The invention discloses nano clay compounded flame-retardant ABS resin, which is prepared by blending the following components in part by weight: 40 to 60 parts of acrylonitrile butadiene-styrene (ABS), 20 to 30 parts of compound flame retardant, 1 to 5 parts of nano clay, 3 to 10 parts of compatilizer, 10 to 30 parts of toughening agent and 0.1 to 2 parts of antioxidant. A preparation method comprises the following steps of: weighing the raw materials according to a ratio in the formula, premixing the ABS and the nano clay in a medium speed mixer for 2 to 5 minutes, adding other raw materials, and mixing for 5 to 10 minutes; and putting the mixed raw materials into a double screw extrusion machine, performing melt extrusion and granulation to obtain the nano clay compounded flame-retardant ABS resin. The resin can reach UL94-V0 class, has stable machinability and mechanical properties, ensures that the micromolecular flame retardant does not seep in the using process, is environment-friendly ...

Preparation method for buckling flame retardant containing phosphor-nitrogen macromolecule

The invention relates to a macromolecular intumescent flame retardant with phosphorus and nitrogen, which is characterized in that: the chemical composition is poly (2, 6 and 7-trioxy-1-phosphorous dicyclic-[2, 2 and 2]-octane-1-anisyl) organic phosphate 4 and 4'-diaminodiphenylmethane; the preparation process is that: 2, 6 and 7-trioxy-1-phosphorous dicyclic-[2, 2 and 2]-octane-1-anisyl is put into the solvent of acetonitrile and dissolved after heating and stirring, and then diamine compound and catalyst are added into the solution, and a temperature reaction is processed under the protection of nitrogen; the solution is filtered when reaction is over to obtain the filter mass after being rinsed and dried. The macromolecular intumescent flame retardant with phosphorus and nitrogen has the advantages of being halogen-free and environment-friendly, big molecular weight, basically solving transplantation, separation, volatilization or other problems on the machineshaping of the flame retardant ...

THREE-CAVITY FLUSHABLE FISH MOUTH LARYNGEAL MASK AIRWAY CATHETER

Disclosed is a three-cavity flushable fish mouth laryngeal mask airway catheter, including a cover, the cover is provided with a respiratory chamber for communicating with a respiratory tract and a digestive chamber for communicating with a digestive tract; the digestive chamber is provided with a digestive opening for communicating the digestive chamber and the digestive tract; a peripheral wall of the digestive chamber is tapered from an end away from the digestive opening to the digestive opening; an edge of the digestive opening includes a plurality of protrusions; and the plurality of protrusions are configured to be close to each other due to a squeezing force during a process of inserting the three-cavity flushable fish mouth laryngeal mask airway catheter into a throat to narrow the digestive opening.

Method for preparing aromatic-aliphatic copolyester

The invention relates to a method for preparing aromatic-aliphatic copolyester. In the method, aromatic binary acid, dihydric alcohol and aliphatic hydroxy acid are used as a copolymerization system to prepare the aromatic-aliphatic copolyester by direct melt polycondensation under the action of a catalyst, wherein the dihydric alcohol is one or both of aliphatic dihydric alcohol and cyclized aliphatic dihydric alcohol. The method overcomes the defect of the generation of poisonous methanol in the prior ester exchange process. By the random copolymerization, a polylactic acid chain segment can be introduced to an aromatic polyester chain segment, and the sequence length of an aromatic component is reduced, thereby improving the degradation property of the copolyester and keeping better mechanical behavior; moreover, the method also has the advantages of simple synthesis process, easy reaction operation and low-priced and easily obtained materials, and the obtained copolyester has certain ...

Preparation method and application of water-based bionic super-hydrophobic-super-oleophylic sponge

The invention relates to a preparation method and application of a water-based bionic super-hydrophobic-super-oleophylic sponge. The preparation method comprises the following steps: stirring a silane coupling agent in water at a high speed; adding alkali liquor to promote hydrolysis of the silane coupling agent in water, and performing polycondensation under high-speed stirring to form hydrophobic silicon dioxide; adding dopamine into the solution and stirring; cutting the melamine sponge, immersing the melamine sponge into a solution containing a silane coupling agent, alkali liquor and dopamine, and then taking out and drying the melamine sponge; the preparation method comprises the following steps: annealing dried melamine sponge containing hydrophobic silicon dioxide and polydopamine at high temperature to obtain the bionic super-hydrophobic-super-oleophylic sponge. The contact angle between the surface of the prepared sponge and water in air is larger than 150 degrees, and the contact ...

Method for preparing degradable organic-inorganic nanometer hybrid material containing POSS (Polyhedral Oligomeric Silsesquioxanes)

The invention discloses a method for preparing a degradable organic-inorganic nanometer hybrid material containing POSS (Polyhedral Oligomeric Silsesquioxanes), comprising the following steps of: (1) firstly, preparing a difunctional POSS derivative (II) by carrying out the addition reaction of amino POSS (I) and 2-hydroxyethyl acrylate through Michael; and (2) secondly, forming an etherified product by carrying out the esterification reaction of aromatic dibasic acid and aliphatic dihydric alcohol and preparing the degradable organic-inorganic nanometer hybrid material containing the difunctional POSS through the melt polycondensation reaction of the difunctional POSS derivative (II) and aliphatic chydroxy oligomer with the etherified product. The preparation method has the advantages ofuniform dispersion and difficult agglomeration of POSS in the hybrid material during preparation, effective improvement on the performances of degradable copolyester composite material, simple operation ...

Naphthalene ring and ester bond structure-containing bismaleimide type compound and preparation method thereof

The invention discloses a naphthalene ring and ester bond structure-containing bismaleimide type compound and a preparation method thereof. The compound of the invention is one bismaleimide type compound, wherein the molecular structure of the compound contains a phthalimide structure; and the compound has the characteristics of high toughness and heat resistance. The preparation method of the naphthalene ring and ester bond structure-containing bismaleimide type compound of the invention has the advantages of high yield, purity, repeatability and the like; the operation process is simple and the reaction equipment investment is small; the reaction process is performed under normal pressure without high-pressure equipment; and the reaction raw material has convenient source and low cost and contributes to further popularization and application.

High-toughness polystyrene alloy and its preparation process

The invention opens a kind of high tenacity polystyrene alloy and the manufacturing method. It uses polystyrene, ethene polymer, volume increasing agent, stabilizer, processing assistant agent and fillers as raw materials, said materials are blended to be even in high-speed blender about 10 minutes, rotates double screw machine extrudes them, the temperature of materials barrel is: rear segment 160-180 deg.C, middle segment 170-220 deg.C, front segment 180-205 deg.C, temperature of mold head 19-205 deg.C, pressure of handpiece: 3-6 MPa, extruded products are cooled and formed in particles, the ivory cylinder particles are obtained.

Irradiation cross-linking low smoke halogen-free fire retardant polyolefin cable material

The invention discloses a halogen-free cable material which is irradiation cross-linked, has less smoke and can retard the inflaming of polyolefine, and consists of the following components by mass: 30 to 50 percent of ethylene-vinyl acetate copolymer, 0 to 20 percent of high-density polyethylene, 30 to 60 percent of magnesium hydrate, 0 to 10 percent of red phosphorus, 1 to 5 percent of resin acceptor, 0.1 to 1.5 percent of cross linker, 1 to 5 percent of compatilizer, 0.1 to 1.5 percent of antioxidizer and 0.1 to 1.5 percent of lubricating agent. The halogen-free cable material which is irradiation cross-linked, has less smoke and can retard the inflaming of polyolefine overcomes the harm to the environment and the human bodies when retarding the inflaming of polyolefine material by using traditional halogen-containing flame retardants, has less smoke, innoxiousness, green and environment protection, and can ensure good mechanical performance, flame retarding performance and processing ...

Long-chain type metal coordination intumescent flame retardant and preparation method thereof

The invention discloses a long-chain type metal coordination intumescent flame retardant and a preparation method thereof. The preparation method comprises the following steps of: synthesizing a long-chain type intermediate product simultaneously containing phosphorus and nitrogen elements by using polyethyleneimine, formaldehyde and phosphorous acid as raw materials; performing coordination reaction on the long-chain type intermediate product and metal acetate to obtain the long-chain type metal coordination intumescent flame retardant. The synthesis method is simple in process, easy for reaction operation and suitable for industrial production, and has low-cost and easily-available raw materials; the flame retardant does not contain halogen and belongs to the green environment-friendly flame retardant; the structural formula is shown as the formula (I) in the specification.

Nano composite material of polyethylene/montorillonite clay in high density and preparation method thereof

The present invention discloses a high-density polyethylene/montmorillonite nano composite material and its preparation method. Said invention adopts high density polyethylene (HDPE), acrylic acid (AA), initiator and organic montmorillonite (OMMT) according to a certain mixing ratio, and utilizes Haake rheometer to mx them for 15-20 min, at 160 deg.C under the condition of screw rotating speed of 60 rpm so as to obtain the invented product.

Nano-clay and nitrogen phosphorus flame retardant synergistic flame retardant polypropylene material and preparation method thereof

The invention discloses a nano-clay and nitrogen phosphorus flame retardant synergistic flame retardant polypropylene material and a preparation method thereof. The nano-clay and nitrogen phosphorus flame retardant synergistic flame retardant polypropylene material comprises the following components: by weight, 62%-71% of polypropylene, 25% - 30% of a nitrogen and phosphorus flame retardant, 1%-3% of nano-clay and 3%-5% of a compatibilizer. The nano-clay and nitrogen phosphorus flame retardant synergistic flame retardant polypropylene material does not contain lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls and poly brominated diphenyl ethers and other harmful substances, is low in heat producing quantity and producing smoke quantity in the process of burning, is less in damages to the environment and the human body, the nano-clay is dispersed evenly in the material, and while improvement of flame retardant properties, physical and mechanical properties and processability ...

Method for preparing aromatic-aliphatic copolyester

The invention relates to a method for preparing aromatic-aliphatic copolyester. In the method, aromatic binary acid, dihydric alcohol and aliphatic hydroxy acid are used as a copolymerization system to prepare the aromatic-aliphatic copolyester by direct melt polycondensation under the action of a catalyst, wherein the dihydric alcohol is one or both of aliphatic dihydric alcohol and cyclized aliphatic dihydric alcohol. The method overcomes the defect of the generation of poisonous methanol in the prior ester exchange process. By the random copolymerization, a polylactic acid chain segment can be introduced to an aromatic polyester chain segment, and the sequence length of an aromatic component is reduced, thereby improving the degradation property of the copolyester and keeping better mechanical behavior; moreover, the method also has the advantages of simple synthesis process, easy reaction operation and low-priced and easily obtained materials, and the obtained copolyester has certain ...

Method for preparing powder paint polyesters by discarded polyester decomposing reclamation

Environment-friendly flame-resistant ABS resin

The invention discloses an environment-friendly flame-resistant ABS resin, which comprises the following components by weight percentage: 72 percent to 84 percent of ABS resin granules, 15 percent to 22 percent of PDSPB expanding type flame retardant, 0.7 percent to 4.5 percent of montmorillonite, 0.1 percent to 0.5 percent of anti-oxidant agent, 0.1 percent to 0.5 percent of anti-dripping agent and 0.1 percent to 0.5 percent of lubricant. The flame-resistant ABS resin does not contain harmful substances of lead, mercury, cadmium, hexavalent chrome, polybrominated biphenyls, polybrominated diphenyl ethers and the like, and meets the requirements of RoHS instruction about innocuity and environmental protection. The montmorillonite/PDSPB synergistic flame-resistant ABS resin not only can guarantee the flame-resistant performance, but also can keep good mechanical performance, can completely or partially replace the flame-resistant ABS resin of the traditional halogenated flame retardantand ...

Method for preparing degradable organic-inorganic nanometer hybrid material containing POSS (Polyhedral Oligomeric Silsesquioxanes)

The invention discloses a method for preparing a degradable organic-inorganic nanometer hybrid material containing POSS (Polyhedral Oligomeric Silsesquioxanes), comprising the following steps of: (1) firstly, preparing a difunctional POSS derivative (II) by carrying out the addition reaction of amino POSS (I) and 2-hydroxyethyl acrylate through Michael; and (2) secondly, forming an etherified product by carrying out the esterification reaction of aromatic dibasic acid and aliphatic dihydric alcohol and preparing the degradable organic-inorganic nanometer hybrid material containing the difunctional POSS through the melt polycondensation reaction of the difunctional POSS derivative (II) and aliphatic chydroxy oligomer with the etherified product. The preparation method has the advantages of uniform dispersion and difficult agglomeration of POSS in the hybrid material during preparation, effective improvement on the performances of degradable copolyester composite material, simple operation ...

Co-catalysis compatibilization modified polystyrene alloy material and preparation method thereof

The invention discloses a co-catalysis compatibilization modified polystyrene alloy material and a preparation method thereof. The preparation method comprises the following steps of: mixing raw materials of polystyrene, an ethylene-octylene copolymer, a co-catalysis system, an antioxidant and a lubricating agent in proportion and stirring evenly for about 5-10 min by using a stirring machine; placing into a double-screw extruder for melt extrusion, wherein the temperature of a feed cylinder is 150-170 DEG C in a feeding region, 165-185 DEG C in a melting region and 170-190 DEG C in a reaction region, the die orifice temperature is 160-180 DEG C, the handpiece pressure is 3-6 Mpa, and the screw speed is 60-90 rpm; and extruding the material, cooling and granulating to prepare a product of cylindrical particles with colors from light green, dark green to dark brown according to different proportions. The alloy material has simple preparation method, low cost, excellent comprehensive performance ...

Sulfuric silane coupling agent and its synthesis process

Buckling flame retardant containing phosphor-nitrogen macromolecule and preparation method thereof

The invention relates to a macromolecular intumescent flame retardant with phosphorus and nitrogen, which is characterized in that: the chemical composition is poly (2, 6 and 7-trioxy-1-phosphorous dicyclic-[2, 2 and 2]-octane-1-anisyl) organic phosphate 4 and 4'-diaminodiphenylmethane; the preparation process is that: 2, 6 and 7-trioxy-1-phosphorous dicyclic-[2, 2 and 2]-octane-1-anisyl is put into the solvent of acetonitrile and dissolved after heating and stirring, and then diamine compound and catalyst are added into the solution, and a temperature reaction is processed under the protection of nitrogen; the solution is filtered when reaction is over to obtain the filter mass after being rinsed and dried. The macromolecular intumescent flame retardant with phosphorus and nitrogen has the advantages of being halogen-free and environment-friendly, big molecular weight, basically solving transplantation, separation, volatilization or other problems on the machineshaping of the flame retardant ...