12 results about "Polycarbonate plastic" patented technology

The invention discloses a method for recovering polycarbonate plastic to obtain an amine high-temperature antioxidant, and belongs to the technical field of plastic recovery. Aromatic amine is used as a nitrogen source, hydroboron and formate are used as in-situ hydrogen donors, and in an inert atmosphere and a heating environment, under the synergistic catalysis of a catalyst and a molecular sieve, the amine high-temperature antioxidant is prepared from polycarbonate based on a one-step method. The reaction path is simple, the selectivity is high, the amine high-temperature antioxidant taking diphenylamine and alkyl diphenylamine as main components can be directly obtained without multi-stage separation and intermediate preparation, and the requirements of simple process flow, low energy consumption and the like are met. The invention provides a high-valued way for polycarbonate recovery, also provides a large-scale raw material source for the field of high-temperature-resistant antioxidants for lubricating oil / fuel / rubber and high polymer materials, and has a wide application prospect.

The invention discloses a lens surface treatment process which sequentially comprises the following steps: carrying out injection molding on polycarbonate plastic to obtain a lens; coating a first optical organic silicon hardening coating on the surface of the lens; performing optical vacuum coating on the lens with the first coating to form a coating layer; carrying out ion bombardment cleaning on the coating layer by using inert gas under vacuum / high vacuum, removing pollutants and generating an activated microstructure so as to improve the adhesive force of a subsequent coating; coating a second optical organic silicon hardening coating on the surface of the bombarded coating layer; and cooling to room temperature to obtain a finished product. The process breaks through the bottleneck that an organic silicon coating cannot be secondarily coated after traditional film coating, a composite protection system is formed, the abrasion resistance and firmness of a lens film layer are remarkably improved, the film layer is prevented from being abraded and faded, the problem of electrostatic reaction of a film coating layer and an electrostatic protection film is solved, the process is suitable for helmet lenses, goggles and the like, and the process is stable and easy to industrialize.

The invention belongs to the technical field of waste polycarbonate recovery, and particularly relates to a method for preparing dihydric alcohol through catalytic hydrogenation recovery of waste polycarbonate. The method comprises the following steps: by taking waste polycarbonate plastic as a raw material, carrying out catalytic hydrogenation reaction in a reaction system of a catalyst, alkali and a solvent in a hydrogen atmosphere, and recovering to prepare dihydric alcohol; the catalyst takes zirconium dioxide as a carrier and is loaded with nickel and palladium. According to the method, carbon-oxygen bonds in a long-chain structure of the waste polycarbonate are efficiently promoted to break through selective catalytic hydrogenation, the waste polycarbonate is converted into dihydric alcohol with a high additional value, the conversion rate of a waste polycarbonate substrate is larger than 80%, the yield of the dihydric alcohol is larger than 85%, recycling of the waste biodegradable CO2-based polycarbonate is effectively achieved, and the method is suitable for industrial production. The emission of CO2 in the polycarbonate degradation process is avoided, and the cycle period of the waste plastic is accelerated; the method is used for upgrading and reproducing the waste plastics. The reaction process is environment-friendly and low in cost, and has higher industrial application potential and high value-added dihydric alcohol.

The application discloses a method for recovering phenol from waste polycarbonate plastic, and belongs to the field of plastic recycling. The method uses a fixed-bed continuous flow reactor and green water as a solvent. Without using a catalyst, the continuous directional rupture of C-O and C-C bonds in waste PC plastic particles is realized by high-temperature steam. Low-molecular chemical substances such as phenol and acetone are effectively recovered. Under optimal conditions, the selectivity of phenol is as high as 95.8%, and high-purity phenol is obtained through rotary evaporation separation and purification. The technology has the advantages of simple operation, low cost, environmental protection and the like, meets the green and sustainable development demand of phenol production, and has a wide application prospect.

This invention discloses a method for detecting the internal stress of polycarbonate plastic products, comprising the following steps: S1. Preparing IS reagent; S2. Preparing N standard polycarbonate samples A; S3. Sorting all standard polycarbonate samples A and setting a test deflection γ for each; S4. Measuring the internal stress σ of each standard polycarbonate sample A at the test deflection γ. 内 And the cracking time T, and the internal stress-cracking time standard curve I was obtained by fitting; S5. The cracking time T of the polycarbonate part B to be tested was measured. B S6. Determine the cracking time T of the polycarbonate part B to be tested on the internal stress-cracking time standard curve I. B The corresponding internal stress value is denoted as σ. 内B Then the internal stress of the polycarbonate part B to be tested is σ. 内B The method for detecting internal stress in polycarbonate plastic products based on the external standard method provided by this invention is a standard working curve method, which provides a new method for quantitative detection of internal stress.

This invention discloses a method for preparing recycled polyarylate from waste polyester and polycarbonate. The recycling and reprocessing method includes the following steps: (1) Under a protective gas atmosphere, polyester and polycarbonate, along with a catalyst, are mixed uniformly in an alcohol solution, heated, and then catalytically alcoholyzed to obtain diester terephthalate and bisphenol A, respectively. (2) The diester terephthalate obtained from the alcoholysis of diester terephthalate is subjected to acyl chloride treatment to obtain the corresponding terephthaloyl chloride. (3) Finally, without separating the end-capping agent from the recycled monomers, terephthaloyl chloride and bisphenol A are co-polymerized and upgraded to polyarylate under mild conditions using interfacial polycondensation technology. This invention eliminates the need for additional purification techniques to remove the end-capping agent from the recycled monomers, simplifies the waste polymer recycling process, and achieves "upgraded recycling" of polyester and polycarbonate plastics, resulting in better economic benefits.

The present application relates to the technical field of polycarbonate, and discloses a preparation method of halogen-free flame-retardant PC plastic material.Polycarbonate and triazine sulfonate-based silicone oil flame retardant are blended in a torque rheometer to obtain the halogen-free flame-retardant PC plastic material.The sulfonate groups in the flame retardant can catalyze the crosslinking of polycarbonate into carbon, and the polysiloxane pyrolyzes to form a Si-C layer on the surface of polycarbonate, and the triazine groups pyrolyze to produce nitrogen and other non-combustible gases, thereby improving the limiting oxygen index, UL94 grade and flame-retardant performance of the polycarbonate plastic material.The triazine sulfonate-based silicone oil flame retardant contains hydroxyl groups and imino groups, has good compatibility with polycarbonate, and has a flexible polysiloxane main chain, so that good toughening effect can be achieved, and the bending strength and impact strength of the polycarbonate material are improved.

The present invention belongs to the technical field of fishing, and specifically relates to a fishing float and a preparation method therefor. The fishing float is composed of the following raw materials: a polymethacrylimide foam material, float stops, a fine metal pin, a hollow cylindrical polycarbonate plastic tube, a gold paint, a fluorescent paint, an epoxy primer, a polyurethane varnish, and a fishing line. In the present invention, the polymethacrylimide foam material is used, and the material has a high strength-to-weight ratio, good durability and high sensitivity; the specially designed grooves and float stops enhance the stability and response speed in water; and the multi-layer paint surface treatment and the fine metal pin structure ensure the uniformity of a paint surface and the structural stability of an assembly, improve the visibility and durability of the float, and make the float adaptive to different environments and convenient for anglers to use.

The application discloses a method for preparing bisphenol A dimethyl ether by directional chemical depolymerization of bisphenol A type polycarbonate plastic. The method adopts a potassium iodide / methanol / dimethyl carbonate synergistic catalytic system, and directional chemical depolymerization is carried out on the bisphenol A type polycarbonate plastic under heating conditions, and an intermediate bisphenol A is in-situ converted into bisphenol A dimethyl ether. The application avoids using expensive and complex synthetic ionic liquids, the catalyst is cheap and easy to obtain and can be recycled and used, the reaction condition is mild, and the product yield can reach 99%. The method is suitable for degradation of real waste PC plastic such as optical discs and buckets and various polyester plastics, and has good substrate universality and industrial application prospect.

The utility model discloses ultra-thin flat-plate large-size television rear shell extrusion manufacturing equipment which comprises a feeding mechanism, a heating material conveying mechanism, a plain end die, an extrusion texture roller set, a trimming mechanism, a stress release transmission mechanism and a cutting mechanism. The heating conveying mechanism, the plain end die, the extrusion texture roller set, the trimming mechanism, the stress release transmission mechanism and the cutting mechanism are sequentially arranged from right to left; according to the utility model, the material without fiber addition is wrapped by the material without fiber addition to form the plate, the plate has certain strength and rigidity due to the glass fiber, so that the strength and the toughness of the large-size television rear shell are improved, and meanwhile, the two side surfaces of the plate are made of the polycarbonate plastics, so that the floating fiber appearance of the glass fiber is avoided, and the service life of the plate is prolonged. And meanwhile, the ductility of the plate can be improved, so that a plurality of texture appearances can be pressed by using a texture roller, and a thinner plate can be formed on the premise of ensuring the strength and the toughness.

The invention discloses a preparation method of a polycarbonate plastic glass slide, which comprises the following preparation steps: S1, selecting polycarbonate glass slides with different sizes and specifications, soaking the polycarbonate glass slides in deionized water before an experiment, cleaning the polycarbonate glass slides for a certain time by an ultrasonic cleaner, and wiping off water stains on the cleaned polycarbonate glass slides by using anti-static dust-free cloth; s2, the polycarbonate glass slide is placed in a constant-temperature drying oven to be dried for a certain time at the constant temperature and then taken out. The polycarbonate plastic glass slide produced by adopting the preparation method has the characteristics of being colorless, transparent, low in cost, simple in production process method, high in production efficiency and the like, and meanwhile, the surface hydrophilic performance of the produced polycarbonate plastic glass slide is controllable; the plastic glass slide effectively solves the problems that the cover glass is broken or the tissue specimen is scratched and falls off due to strong adhesive force between the glass glass slide and the aqueous sample, and the plastic glass slide has the advantages of being simple to recycle and dispose after being used, small in environmental pollution, not easy to damage and the like.

This application relates to the field of composite material processing, specifically disclosing a rapid composite process for thermosetting composite materials and plastic assembly structures. The composite process includes the following steps: applying a primer to the composite surface of a thermosetting carbon fiber resin composite material to obtain a preform; placing the preform in a mold and using insert injection molding to composite the plastic onto the preform to obtain a composite structure; the primer comprises the following components by weight: 15-25 parts epoxy resin, 75-85 parts ethyl acetate, 15-20 parts acetone, and 75-80 parts polyisocyanate; the thermosetting carbon fiber composite material is an epoxy resin-based thermosetting carbon fiber composite material; and the plastic is polycarbonate plastic. This application not only improves the bonding strength of the plastic in the thermosetting carbon fiber composite material but also increases production efficiency.