38results about How to "Good softness at low temperature" patented technology

The invention relates to a transparent medical antibacterial polyvinyl chloride material and a preparing method thereof. The material comprises 100 weight parts of polyvinyl chloride resin serving as basic resin, an antibacterial agent, plasticizer and optional stabilizer. The antibacterial agent is directly added into the carrier material, by means of a blending method, the antibacterial agent is directly added into the carrier material, and the raw material obtains an antibacterial property. The polyvinyl chloride material has the greatest advantage of being easy to process and capable of ensuring durability, as the new antibacterial agent on the inner layer can be exposed even if the material surface is abraded, the antibacterial agent cannot be transferred, and the transparent medical antibacterial polyvinyl chloride material is particularly suitable for serving as a medical macromolecular material.

The invention discloses a PVC / NBR cold-resistant oil-resistant flame retardant thermoplastic elastomer material for a new energy automobile charging pile cable and a preparation method thereof. The elastomer material is prepared from, by weight, 100 parts of polyvinyl chloride resin, 20-40 parts of powder butyronitrile, 30-40 parts of plasticizer A, 20-30 parts of plasticizer B, 20-30 parts of plasticizer C, 5-10 parts of stabilizer, 6-12 parts of flame retardant A, 6-12 parts of flame retardant B, 6-12 parts of flame retardant C, 0.5-1.5 parts of lubricant, 1-2 parts of antioxidant A, 1-2 parts of antioxidant B and 40-70 parts of inorganic filler. The elastomer material is high in mechanical property, good in hydrolysis resistance, strong in oil resistant property and cold resistant property and good in dispersion uniformity and low-temperature flexibility, and therefore the cable is not damaged in multiple times of tow dragging; the PVC / NBR cold-resistant oil-resistant flame retardant thermoplastic elastomer material is good in processing performance, free of particles and smooth in extrusion surface, low in cost, easy to prepare and operate, suitable for occasions on which the elastomer material needs to be frequently bent and scraped at low temperature with oil.

A polycarbonate diol composition containing a polycarbonate diol having a structure represented by general formula (I) and a polycarbonate structure represented by general formula (II), the polycarbonate diol composition having a melt viscosity at 50 DEG C of 1000-10000 mPa * s, and the average value of the number of repetitions (n11) in general formula (I) being 12 or more.

The invention relates to wet-process polyurethane resin for high-density shoe leather. The polyurethane resin is prepared from isocyanate, a polyether polyol mixture, a chain extender and N, N-dimethylformamide serving as an organic solvent. Polyoxytetramethylene-ethylene epoxide copolyether diol and polyoxypropylene diol are taken as macromolecular polylol raw materials for reacting, the raw materials have high hydrolysis resistance and the polyurethane resin can be endowed with high low-temperature flexibility and rebound resilience, so that the prepared high-density shoe leather has finer folds, high durability and high low-temperature adaptability, and recovers quickly. On the aspect of synthesis technology, a special process for stepwise reaction of two polyether polyols is designed,so that a macromolecular structure is more regular, and advantages of the two polyether polyols can be brought into play.

The invention relates to the field of organic high-polymer materials, and particularly provides a low-temperature-resistant high-ductility anti-seepage adhesive, and a preparation method and application thereof. The preparation method comprises the following steps: by using a melamine formaldehyde resin as a main material and polyoxypropylene triol as an NCO prepolymer, carrying out reaction with a polymer (TDI (toluene diisocyanate) and / or MDI (methylenediphenyl diisocyanate)) under the action of a thixotropic agent (silicon dioxide) and a tin catalyst in the presence of polypropylene glycol to form a uniform high-polymer flexible material, and mixing with a filler to obtain the anti-seepage adhesive which has the advantages of no pollution, low specific gravity, high ductility, high deformation adaptability, favorable corrosion resistance, favorable low-temperature resistance, favorable freezing resistance and no water permeability. The anti-seepage adhesive has the characteristics of favorable low-temperature flexibility, no crack at -30 DEG C, no water permeability, high stretching resistance (3.10 MPa) and high elongation percentage (1211%). The anti-seepage adhesive can effectively obstruct seepage of earthfill dams, earth water passages and the like, and is a novel synthetic soil engineering anti-seepage material with wide market prospects.

The invention discloses an ultra-low-temperature-resistant environment-friendly flexible cable, and relates to the technical field of cables. The technical scheme mainly includes that the ultra-low-temperature-resistant environment-friendly flexible cable comprises ultra-fine copper conductors, insulating layers and a protective layer, the insulating layers externally coat a plurality of strandedultra-fine copper conductors to form cable cores, the protective layer coats at least two cable cores, components of the insulating layers are as same as those of the protective layer, and the insulating layers and the protective layer comprise, by weight, 30-60 parts of polyvinyl chloride resin, 20-30 parts of ethylene propylene terpolymer, 15-30 parts of cold-resistant plasticizers, 20-35 partsof low-temperature-resistant modified materials, 10-15 parts of halogen-free flame retardants, 20-35 parts of fillers, 2-6 parts of antioxidant, 5-8 parts of stabilizers, 1-3 parts of lubricants and 2-4 parts of anti-aging agents. The ultra-low-temperature-resistant environment-friendly flexible cable solves the problem that an existing cable is low in torsion resistance and easy to crack in an ultra-low-temperature environment and can generate harmful gas in combustion. By the aid of the cold-resistant plasticizers and the low-temperature-resistant modified materials, the cable is high in torsion resistance and not easy to crack in the ultra-low-temperature environment and is environmentally friendly in combustion.

The invention discloses a one-component reactive polyurethane hot-melt adhesive. The raw material composition includes a polyurethane prepolymer, a chain extender, a tackifying resin, a latent curing agent, and a filler. The polyurethane prepolymer has a molecular weight of 500- 3000 polyol, polyisocyanate and catalyst are polymerized; the raw material composition also includes a plasticizer, and the plasticizer is dioctyl phthalate and / or diethylene glycol dibenzoate. In the component of one-component reactive polyurethane hot-melt adhesive of the present invention, by adding plasticizer, plasticizer is dioctyl phthalate and / or diethylene glycol dibenzoate, and above-mentioned two kinds of materials are for polyurethane The plasticizing efficiency is high, the volatility is low, and it has good low-temperature flexibility. The addition of plasticizers weakens the interaction between the polymer chains and improves the elasticity and flexibility of the polymer material. , Improve the high and low temperature resistance of hot melt adhesives.

The invention belongs to the field of protective films, and discloses a protective film for curved surface elements, which comprises a first polymer resin mixed layer, a second polymer resin mixed layer, an adhesive layer, and a release film from top to bottom, in parts by weight The composition of the first polymer resin mixed layer is: 20-30 parts of TPU, 6-10 parts of filler, 5-10 parts of anti-wear agent, 2-4 parts of dispersant, 4-8 parts of antistatic agent , 0.2 to 0.5 parts of leveling agent; the composition of the second polymer resin mixed layer is: 15 to 25 parts of TPU, 2 to 5 parts of filler, 1 to 2 parts of dispersant, 5 to 8 parts of adhesion promoter , 0.1 to 0.4 parts of wetting agent. The invention also discloses a preparation method of the protective film. The protective film of the present invention can be used on flat and curved display elements, the film is soft, has high elongation, the protective film has good conformability to curved surfaces, and the stretched film is not easy to be stretched, broken and deformed; the protective film is scratch-resistant Good performance, oil resistance, waterproof and dustproof.

The invention relates to the field of electric wire and cable material manufacture, in particular to a polyvinyl chloride / sulfonated cis-butadiene rubber and a preparation method thereof. The polyvinyl chloride / sulfonated cis-butadiene rubber has excellent cold resistance and low temperature flexibility. In the method, the sulfonated cis-butadiene rubber is added to improve the cold resistance and the low temperature flexibility of polyvinyl chloride. The cis-butadiene rubber is the rubber with the best low temperature performance, the brittle point is 110 DEG C below zero which is far lower than that of 35 DEG C below zero of acrylonitrile-butadiene rubber, and the low temperature resilience of the cis-butadiene rubber is the best in conventional rubber. However, the cis-butadiene rubberis non-polar rubber and has poor intermiscibility with the polyvinyl chloride, and sulfonate polar groups are introduced into molecular chains after the sulfonation reaction of the cis-butadiene rubber, so the intermiscibility between the cis-butadiene rubber and the polyvinyl chloride is greatly improved to form an even blending system.