35results about How to "Low modulus" patented technology

The invention provides a wide-temperature-range heat-resistant bi-component polyurethane heat-conducting structural adhesive for a power battery PACK as well as a preparation method and application of the wide-temperature-range heat-resistant bi-component polyurethane heat-conducting structural adhesive. The bi-component polyurethane heat-conducting structural adhesive comprises a component A and a component B. The component A comprises the following components: bio-based polyol, polyol resin A, polyol resin B, a heat-conducting filler, a thixotropic agent, a moisture scavenger A and a catalyst; and the component B comprises the following components: an isocyanate-terminated polyurethane prepolymer, a heat-conducting filler, a thixotropic agent, a moisture scavenger B and a coupling agent. The polyurethane heat-conducting structural adhesive disclosed by the invention has the advantages that the damp-heat aging resistance and the high and low temperature resistance are greatly improved, the combination of flexibility, heat resistance and aging resistance is realized, and the polyurethane heat-conducting structural adhesive has wide temperature range applicability and is suitable for being applied to power battery PACK heat management and structural bonding.

The present invention belongs to the technical field of polyethylene preparation, and specifically relates to a cross-linked polyethylene insulated cable and a preparation method thereof. The cross-linked polyethylene insulated cable is composed of material A and material B, and the weight ratio of material A to material B is 95:5; material A is composed of the following raw materials: modified linear low-density polyethylene, 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane, di-tert-butylperoxyisopropylbenzene, vinyl tri(2-methoxyethoxy)silane, 1,2-polybutadiene; material B is composed of the following raw materials: linear low-density polyethylene, dibutyltin dilaurate, and antioxidant. In the cross-linked polyethylene insulated cable of the present invention, material A interacts with material B, so that the finally prepared cross-linked polyethylene insulated cable has excellent mechanical properties, chemical stability, and heat aging resistance.

The present invention relates to a polyurethane resin composition including an isocyanate group-terminated urethane prepolymer (E) and a neutralizer (F). The isocyanate group-terminated urethane prepolymer (E) contains a reaction product of a polyol (A) containing a polycarbonate polyol (B) having an average number of hydroxyl functional groups exceeding 2, an organic acid (C), and a polyisocyanate (D), in which a total content of urea groups in the polyurethane resin composition is 0.01 to 0.80 mmol / g with respect to a sum of a mass of the isocyanate group-terminated urethane prepolymer (E) and a mass of the chain extender (G), and the polycarbonate polyol (B) has a deemed average number of functional groups of 2.0 to 3.90.

The utility model provides a panel supporting structure and a display device.The panel supporting structure is used for being arranged on the non-display side of a display panel so as to support the display panel; the panel supporting structure comprises a supporting back plate which is provided with a bendable area, and the bendable area comprises an opening area and a non-opening area; the covering film at least covers one side, deviating from the display panel, of the bendable area; wherein at least one of the supporting back plate and the covering film is internally provided with a shear thickening material layer, and at least part of the shear thickening material layer is arranged at the position corresponding to the opening area. According to the panel supporting structure and the display device, the mechanical strength of the display device can be improved.

The invention discloses a piezoelectric film with bionic textures and a preparation method and application thereof, the piezoelectric film is formed by directionally stacking and depositing fibers with core-shell structures, the piezoelectric film has a gully-bulge alternating bionic morphology imitating human skin surface textures, and the aperture of the piezoelectric film is gradually increased from an attachment surface in the thickness direction; the fiber having the core-shell structure comprises: a core layer having a porous structure and containing modified molybdenum disulfide and polyester; the shell layer wraps the core layer, and the shell layer contains collagen; the piezoelectric film comprises a sensing unit area and a flexible connection area, the collagen crosslinking degree of the sensing unit area is larger than 75%, and the collagen crosslinking degree of the flexible connection area is 40%-55%. Under the synergistic effect of materials and structures, the piezoelectric film not only has a high piezoelectric constant, but also shows excellent mechanical properties, air permeability and moisture penetrability, and has wide application prospects in the fields of electronic skin, health monitoring and the like.

The invention discloses low-modulus anti-fatigue composite hydrogel as well as a preparation method and application thereof. According to the composite hydrogel, low-modulus hydrogel is used as a soft matrix layer, and stretchable fabric is used as a reinforced knitted fabric layer; the preparation method comprises the following steps: putting the stretchable fabric into a hydrogel pre-polymerization solution, and forming a three-dimensional polymer network through a circulating freeze-thaw treatment method. And then putting the hydrogel into a drying oven, and carrying out drying and annealing treatment to form the annealed composite hydrogel. And finally, immersing the annealed composite hydrogel in deionized water until the composite hydrogel is completely swelled to form the required composite hydrogel. The invention also discloses application of the composite hydrogel as an artificial heart valve prosthesis. The composite hydrogel has the advantages of biological tissue-like stress-strain behavior, low modulus, high fatigue threshold value and the like.

This invention discloses a five-layer electrodeposited high-sealing corrugated pipe based on ultrasound assistance and its preparation method, belonging to the technical field of metal corrugated pipe manufacturing. It aims to solve the problem that in multi-layer electrodeposited corrugated pipes, it is difficult to effectively coordinate current density, surface quality, and interfacial bonding strength, leading to insufficient densification of the deposited layer, unstable interlayer bonding, poor wall thickness uniformity, and failure to meet airtightness standards, ultimately resulting in poor overall performance stability. This invention includes a five-layer composite structure in which the pipe wall is composed of alternating nickel-cobalt alloy and copper layers. Each layer of the five-layer composite structure undergoes ultrasonic vibration treatment during deposition. The corrugated pipe prepared by this invention has a uniform and dense deposited layer with good interlayer bonding. The five-layer alternating deposition layer composite structure not only achieves uniform stress transmission and dispersion, effectively delaying crack propagation and interfacial penetration, but also improves the uniformity of wall thickness distribution, enabling the corrugated pipe to exhibit higher structural stability and long-term reliability in a sealed environment.

The present application relates to a kind of high ductility silicon hydrogel, which is prepared by polymerization reaction of polymerizable composition containing thiol with functionality greater than or equal to 3, and the elongation of the high ductility silicon hydrogel is 285%-439%.The present application also relates to a kind of high ductility contact lens and its preparation method.By adding thiol with functionality greater than or equal to 3 as crosslinking agent in the formula of silicon hydrogel, the formed silicon hydrogel polymer network is more regular, more full and more stretchy, so that the prepared contact lens has good ductility, and the contact lens has high water content and low modulus.In addition, compared with the contact lens formed without adding thiol with functionality greater than or equal to 3, the size change of the contact lens formed after adding thiol with functionality greater than or equal to 3 is less than 5%.

The invention discloses a porous fusion cage and a design device and method. The porous fusion cage design device comprises a three-dimensional model acquisition module, a mechanical calculation module, a finite element module and a fusion cage parameter generation module. The three-dimensional model acquisition module is used for acquiring a three-dimensional model of a target area of a target object; the mechanical calculation module is used for calculating muscle and ligament load data of a target area of a target object; the finite element module is used for determining a finite element analysis result according to the three-dimensional model, the fusion cage model and the muscle and ligament load data; and the fusion cage parameter generation module is used for determining the design parameters of the porous fusion cage according to the finite element analysis result. According to the porous fusion cage design device, the overall biomechanical condition of the adjacent vertebral bodies can be comprehensively considered, and the designed porous fusion cage better meets the actual use requirement of a patient.

The utility model belongs to the technical field of self-adhesive labels, in particular to a flexible self-adhesive label suitable for curved surface adhesion, which comprises an outer layer, and a printing layer and a protective layer are sequentially coated on the upper surface of the outer layer from bottom to top. According to the flexible self-adhesive label suitable for curved surface pasting, the flexible self-adhesive label suitable for curved surface pasting is arranged and can adapt to curved surface pasting, the middle layer is made of silicon rubber, and controllable and local deformation (such as groove widening / deepening) can be generated when the label is subjected to bending or stretching stress through the stress release groove microstructure; therefore, stress is efficiently absorbed and dissipated, failure caused by the fact that the stress is transmitted to the edge of the label or the interface of the bonding layer is prevented, the stressed stress can be dispersed through the wave grooves, and the situation that the middle layer of the label is broken after being bent multiple times due to stress concentration is avoided.

The invention relates to an all-silicon-carbide low-temperature lens, a manufacturing method and application of the all-silicon-carbide low-temperature lens to a coaxial four-mirror optical infrared camera. The all-silicon carbide low-temperature lens comprises a primary lens, a secondary lens, a third lens and a fourth lens. The primary mirror and the fourth mirror are arranged in a back-to-back manner and structurally form an integrated structure of the primary mirror and the fourth mirror, namely, the primary mirror and the fourth mirror; the main fourth mirror and the third mirror are respectively connected to two ends of a lens bearing cylinder, and the secondary mirror is connected with one end, provided with the main fourth mirror, of the lens bearing cylinder through a secondary mirror supporting rod assembly; the main fourth mirror, the secondary mirror, the third mirror, the secondary mirror supporting rod assembly and the lens bearing cylinder are made of silicon carbide materials. The whole silicon carbide lens structure shrinks integrally in a low-temperature environment, athermalization design of a lens light machine is achieved, and low-temperature stability and adaptability of the lens are improved. The lens bearing cylinder improves the structural rigidity and stability of the lens, serves as a low-temperature cold shield, inhibits external stray light, and improves the signal-to-noise ratio of the lens.

This invention relates to the field of advanced semiconductor packaging materials technology, and particularly to a low-modulus, high-strength, and low-moisture-absorbing epoxy resin composition and its preparation method. By weight, the epoxy resin composition comprises: 20-60 parts of MAR-type epoxy resin base material one, 15-40 parts of modified masterbatch, 0.01-5 parts of a first catalyst, 30-700 parts of silicon powder, 0-30 parts of additives, and 25-60 parts of curing agent; the modified masterbatch is prepared from: MAR-type epoxy resin base material two, a second catalyst, and HTPB; the curing agent is MAR-type phenolic resin. This invention introduces HTPB into the MAR-type resin system to create a synergistic effect, resulting in a packaging material with low modulus, high strength, and low moisture absorption. The obtained composition can achieve a moisture sensitivity level of MSL1, meeting the high reliability packaging requirements of DFN / QFN and other packaging forms.

The invention belongs to the technical field of adhesives, and particularly relates to a low-modulus high-thermal-conductivity acrylate-based chip mounting adhesive and a preparation method thereof.The low-modulus high-thermal-conductivity acrylate-based chip mounting adhesive is prepared by taking acrylate as a base material and taking modified diamond and the like as additives through mixing, the flexible polymer chain segment structure contains a large amount of hydroxyl substituent groups generated by ring-opening reaction, so that the flexible polymer chain segment structure can participate in the subsequent curing process of the acrylate mounting adhesive, and the diamond and the acrylate mounting adhesive can generate a good interface effect, so that a dispersing agent is more uniformly added into acrylate, and the purposes of adding a small amount of the dispersing agent and adding a small amount of the dispersing agent are achieved. In addition, in the curing process, the flexible macromolecular chain segment is introduced into the acrylate structure, and the modulus of the mounting adhesive can be effectively reduced by utilizing the flexibility of the flexible macromolecular chain segment.

The application discloses an antibacterial bio-based polyamide elastomer and a preparation method thereof. The preparation method comprises the following steps: preparing a polyamide prepolymer containing a tertiary amine structure through ring-opening polymerization reaction of caprolactam, N-diethyl-aminocaprolactam and sebacic acid, then reacting with polytetramethylene ether glycol to form a polyamide-polyether block copolymer elastomer, and further modifying the polyamide-polyether block copolymer elastomer through reaction with a halogenated hydrocarbon to realize quaternary ammonium modification, so that the quaternary ammonium salt antibacterial group is stably introduced into the polymer molecular structure in a covalent manner. The bio-based polyamide elastomer prepared by the application has excellent elastic properties and persistent and stable quaternary ammonium antibacterial properties, the antibacterial components are not easy to migrate and lose, the preparation process is simple and controllable, is suitable for the field of functional materials, and has a good application prospect.

There is provided a polyphenylene sulfide resin composition obtained by blending a (A) polyphenylene sulfide resin, an (B) amino group-containing resin, an (C) epoxy group-containing elastomer, and (X) at least one compound having a molecular weight of 1000 or less and selected from among carboxylic acids and carboxylic anhydrides, in which, when the total amount of the component (A), the component (B), and the component (C) is set to 100% by mass, the amount of the component (A) is 20% by mass or more and 60% by mass or less, and in the morphology of a molded article made of the polyphenylene sulfide resin composition as observed with a transmission electron microscope, the (A) polyphenylene sulfide resin forms a continuous phase, and the (B) amino group-containing resin and the (C) epoxy group-containing elastomer form a dispersed phase. The present invention makes it possible to obtain a polyphenylene sulfide resin composition that has high flexibility, high toughness, heat aging resistance, and chemical resistance, and is excellent in molding processability, and a molded article using the same.

The invention relates to a metallic glass flake, a preparation method thereof and application of the metallic glass flake in heavy-duty anticorrosive paint, and belongs to the technical field of amorphous alloy. The metal glass flake is a flaky amorphous alloy with an irregular shape on the edge, and comprises the following components: Fe, Cr, P, MA and MB, mA is at least one of B, C and Si; mB is at least one of Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Td, Dy, Ho, Er, Tm, Yb and Lu; the molar percentages of Fe, Cr, P, MA and MB in the metallic glass flakes are respectively 40%-80%, 1%-40%, 1%-20%, 1%-10% and 0%-5%; the radius-thickness ratio of the metal glass flakes is larger than or equal to 3. The metal glass flakes can endow the heavy anti-corrosion coating with good wear resistance and adhesive force and excellent corrosion resistance.

The invention relates to an attached photoelectric health monitoring device and method based on a photoelectric detector, and the device comprises an ultrathin flexible substrate which is made of Parylene-C; the S-shaped interconnection electrode is formed on the ultrathin flexible substrate; the perovskite photoelectric detection layer with the two-dimensional Ruddlesden-Popper structure is regionally deposited on the snakelike interconnected electrode, and the general formula of the perovskite photoelectric detection layer is (PEA) 2 (MA) < n > < 1 > Pb < n > I < 3 > < n > < 1 >; the LED light source is arranged on the ultrathin flexible substrate, and the LED light source and the two-dimensional Ruddlesden-Popper structure perovskite photoelectric detection layer are located on the same plane to form a reflective detection mode; and the packaging layer covers the two-dimensional Ruddlesden-Popper structure perovskite photoelectric detection layer and the LED light source, the material of the packaging layer is Parylene-C, and the packaging layer and the ultrathin flexible substrate jointly form a symmetrical double-layer packaging structure. Compared with the prior art, the invention has the advantages of high fitness and comfort, high sensitivity, quick response, high environmental stability and mechanical durability, low power consumption, high signal-to-noise ratio, high signal quality and detection precision and the like.

The invention relates to a polyurethane sealant for a power battery. The polyurethane sealant is prepared from the following components in parts by weight: 30 to 50 parts of self-made silicon modified diol, 10 to 20 parts of polyether diol, 10 to 20 parts of polyester diol, 12 to 25 parts of polyisocyanate and 4 to 8 parts of gaseous silicon. The polyurethane sealant prepared by the method provided by the invention has good high and low temperature resistance, has low storage modulus in a range of-30 DEG C to 60 DEG C, greatly reduces the occurrence of glue failure and other phenomena caused by temperature change, can form effective adhesion to different materials, and meets the requirement of no obvious strength attenuation for 1000 hours in a double-85 test; and the vehicle use requirements under most working conditions can be met.

The invention relates to the technical field of manufacturing of magnetic materials and flexible electronic devices, in particular to a flexible magnetic sheet, a preparation method of the flexible magnetic sheet, a magnetic attraction assembly and wearable equipment. The preparation method of the flexible magnetic sheet comprises the following steps: mixing anisotropic magnetic powder treated by a coupling agent with liquid silicone rubber and a catalyst to form slurry, then carrying out hot press molding by a press with a pressing orientation device to enable the magnetic powder to be directionally arranged, and finally, carrying out post-treatment to obtain the flexible magnetic sheet. According to the method, the magnetic sheet with high residual magnetism, high attraction, extremely low modulus and high flexibility is successfully prepared through cooperation of magnetic powder type selection and orientation processes and optimization of the content of key components, and the problem that magnetic performance and elasticity of a traditional magnetic sheet are difficult to consider at the same time is solved.

The invention discloses a high-durability gradient reinforced composite material for an aircraft tire and a tire bead structure of the aircraft tire. The Shore A hardness of the high-durability gradient reinforced composite material is 50-75 degrees, the 100%-300% stress at definite elongation is larger than or equal to 5 MPa, the tensile strength is larger than or equal to 20 MPa, and the elongation at break is larger than or equal to 450%. In the thickness direction, the high-durability gradient reinforced composite material has a hardness gradient and / or a modulus gradient. Tire bead reinforcing rubber is arranged between tire bead rubber and the rim edge of the tire bead structure of the aircraft tire, the tire bead reinforcing rubber adopts the high-durability gradient reinforced composite material, the hardness of the tire bead reinforcing rubber is gradually increased and / or the modulus is gradually increased in the direction from the tire bead rubber to the rim edge, the concentration phenomenon of dynamic strain is effectively reduced, the heat generation amount is reduced, and the service life of the tire bead structure is prolonged. Material aging and performance degradation caused by high temperature are avoided, the durability and fatigue resistance of the tire bead structure are remarkably improved, and the use requirements of aircraft tires under high-load and high-frequency strain working conditions are met.

The application provides a preparation method of a low-density high-modulus high-strength magnesium alloy, comprising the following steps: a) according to the target alloy composition, magnesium ingot, intermediate alloy and pure metal are weighed and put into a smelting furnace, argon is introduced into the smelting furnace until the oxygen content is less than 200 ppm, and heating is performed; after the alloy is melted, when the temperature reaches 730-760 DEG C, degassing refining is started to obtain a degassed high-purity magnesium alloy melt; the target alloy composition is: 4-7 wt% of Gd, 1.5-4 wt% of Y, 1.5-3 wt% of Si, 2-6 wt% of Li, 3-8 wt% of Al, 1-3 wt% of Zn, 1.5-2.5 wt% of Nb, 0.3-0.8% of Zr, and the balance of Mg; b) the degassed high-purity magnesium alloy melt obtained in step a) is sequentially subjected to casting, homogenization, forging and aging to obtain a low-density high-modulus high-strength magnesium alloy. The low-density high-modulus high-strength magnesium alloy prepared by the preparation method has the performance indexes of: the elastic modulus is greater than or equal to 57 GPa, the tensile strength is greater than or equal to 390 MPa, the elongation after fracture is greater than or equal to 6%, and the density is less than or equal to 1.86 g / cm 3 , which meets the demand of lightweight of aerospace vehicles.

The invention discloses a preparation method and a use method of a hydrogel vascular embolism material, and belongs to the technical field of vascular embolism materials. A low-temperature dispersion mode is adopted in the preparation process of the hydrogel vascular embolism material, the thixotropic agent can be uniformly dispersed in water to form turbid liquid, agglomeration and caking are avoided, the thixotropic agent is dissolved in water to form uniform gel in the subsequent stirring process, small gel blocks do not exist in the obtained hydrogel vascular embolism material, and the hydrogel vascular embolism material has good biocompatibility. Smaller blood vessels can be entered; in addition, the hydrogel vascular embolism material is further sheared, mixed and dispersed during clinical use, the viscosity and dispersion performance of the hydrogel vascular embolism material can be adjusted at any time according to the state of a patient and the actual situation, and in the process, a medicine-loaded solution can be mixed with the hydrogel vascular embolism material; the dispersibility of the medicine can be improved, the dosage and the variety of the medicine are accurately controlled, and the failure of the medicine due to advanced loading in long-term storage is effectively avoided.

The application discloses a kind of low modulus silicone rubber based on topological network regulation and its preparation method and application, belong to room temperature vulcanized silicone rubber technical field.It includes component A, component B and component C;The A component, by weight fraction, includes tetraethenyl terminated polysiloxane 100 parts, white carbon black 10-50 parts, platinum catalyst 0.01-0.5 parts;The B component, by weight fraction, includes end hydrogen silicone oil 3-50 parts, tetraethenyl terminated polysiloxane 50-97 parts, white carbon black 10-50 parts, inhibitor 0.01-0.5 parts;The C component, by weight fraction, includes hydrogen-containing silicone resin 0-30 parts.The application controls the topological network of silicone rubber, reduces its modulus at the same time, makes it have better mechanical properties and damping performance, realizes the synergistic optimization of comprehensive performance.

The application provides a variable dihedral angle inflatable folding wing based on an electric response shape memory polymer and a control method, which comprises a wing shell, a control system and a pump; the wing shell comprises a framework, an elastic body electrothermal layer and a flexible skin, the framework comprises a wing rib and a spar, and the spar is provided with an electric response shape memory polymer; an upper air bag and a lower air bag which are not conductive to each other are symmetrically installed inside the wing contour between adjacent wing ribs; adjacent upper air bags are connected to each other, and adjacent lower air bags are connected to each other; the upper air bag and the lower air bag at one end of the wing contour are connected with the pump respectively; the control system controls the electric response shape memory polymer to conduct electricity, so that the spar generates thermal deformation; and the control system controls the pump to make the upper air bag or the lower air bag negative pressure, so as to change the upper or lower dihedral angle of the wing. The application can realize variable dihedral angle under different flight requirements.

The invention relates to a preparation method and application of a low-modulus low-water-absorption polyurethane micro-channel mattress, and belongs to the technical field of vibration and noise reduction of rail transit. According to the polyurethane micro-channel mattress with the density of 200 kg / m < 3 > to 300 kg / m < 3 >, the static foundation modulus can be as low as 0.012 + / -10% N / mm < 3 >, meanwhile, the dynamic and static stiffness ratio does not exceed 1.35, the polyurethane micro-channel mattress is a closed-cell system, the mass water absorption change rate is smaller than 12%, the water-resistant strength change rate is smaller than 10%, and the water-resistant elongation at break is smaller than 15%. The polyurethane micro-channel mattress disclosed by the invention has the advantages of good creep resistance, lower compression-resistant inherent frequency and higher vibration isolation efficiency.

The invention discloses a preparation method of a light-weight low-tensile high-modulus polyester industrial yarn, which comprises the following steps of: tackifying a high-viscosity polyester chip by a solid-phase tackifying device, melting and extruding by a screw extruder, entering a spinning manifold, distributing the melt in the spinning manifold by a spinning component, and pressing into a porous spinneret plate to form a tow, sequentially cooling, oiling, drafting, heat setting and winding to obtain the low-stretch high-modulus polyester industrial yarn. The intrinsic viscosity of the high-viscosity polyester chip is 1.10-1.16 dL / g, the melting point is 257-265 DEG C, the specification of the chip is 2.35 + / -0.50 g / 100, the number of holes of a spinneret plate is 280f, the hole pitch of the spinneret plate is 0.96 cm, and the hole diameter is 0.8-0.99 mm. The industrial yarn produced by the method shows excellent characteristics of light weight, low stretching and high modulus, and completely meets the requirements of high-end rubber framework materials such as radial tires and the like on high-performance fibers.

The invention discloses an OCA (Optical Clear Adhesive) full-lamination optical adhesive and a preparation method thereof, belongs to the technical field of optical adhesives, and aims to provide an optical adhesive with high optical performance, excellent flexibility and self-repairing capability. The optical cement is prepared by single-sided ultraviolet light gradient initiation curing of a prepolymer system consisting of a soft monomer, a hard monomer, a functional monomer, a dynamic cross-linking agent, a photoinitiator, an ultraviolet light absorber and a silane coupling agent. Through a light intensity depth attenuation effect caused by competitive light absorption of the ultraviolet light absorber, a gradient network structure of which the crosslinking density is continuously decreased progressively along the thickness direction is formed in situ in a single adhesive layer; a disulfide bond is introduced into a polymer network through a dynamic cross-linking agent, so that the material is endowed with self-repairing and stress relaxation functions.

This invention relates to a salt spray resistant and anti-aging curing coating and its preparation method, belonging to the field of coating technology. The coating includes modified epoxy resin, ternary nanocomposite filler, composite light stabilizer, hydrophobic eutectic solvent, polysiloxane-modified aromatic amine curing agent, and bio-based polyurethane curing agent. The modified epoxy resin is prepared by reacting bisphenol F epoxy resin, KH-560 silane coupling agent, and tetrabutylammonium bromide, followed by the addition of bi-terminated epoxy silicone oil, 3,3'-dithiodipropionic acid, and p-toluenesulfonic acid, and then by adding pentaerythritol phosphate and antioxidant 1010. The polysiloxane-modified aromatic amine curing agent is prepared by reacting m-phenylenediamine as a matrix, KH-560 silane coupling agent, diphenylsilanediol, and dibutyltin dilaurate. The bio-based polyurethane curing agent is prepared by reacting castor oil-modified polyol, isophorone diisocyanate, dibutyltin dilaurate, dimethylolpropionic acid, and trimethylolpropane.

The invention relates to a multilayer thermosetting film which comprises a reinforcing layer and a bonding layer, and the reinforcing layer comprises the following raw materials in parts by weight: 5-15 parts of polyfunctional epoxy resin, 1-10 parts of amine curing agent, 1-5 parts of special interface resin, 1-5 parts of assistant combination, 50-100 parts of filler and 10-100 parts of solvent; the bonding layer is prepared from the following raw materials in parts by weight: 1 to 40 parts of epoxy resin, 1 to 40 parts of latent curing agent, 1 to 40 parts of vinyl resin combination, 30 to 80 parts of flexible reactive resin, 0.01 part of accelerant, 0.05 part of initiator, 10 to 100 parts of solvent and 1 to 5 parts of assistant combination. The bonding layer has good flowability and cohesiveness and plays a role in bonding.

A colored optical fiber comprises a bare optical fiber, a primary layer formed of a first ultraviolet curing resin covering the bare optical fiber, and a secondary layer formed of a second ultraviolet curing resin covering the primary layer, wherein a Young's modulus of the primary layer is smaller than 70% with respect to a saturated Young's modulus of the primary layer, and wherein the saturated Young's modulus of the primary layer is smaller than or equal to 0.85 MPa.