427results about How to "Not easy to migrate" patented technology

The invention discloses a method for preparing flame-retardant waterborne polyurethane containing phosphaphenanthrene and/or phenyl phosphate groups. The method is characterized by comprising the following step of reacting dihydric alcohol as a reactant which contains phosphaphenanthrene and/or phenyl phosphate groups and of which the hydroxyl groups are symmetric with diisocyanate, macromolecular dihydric alcohol, anionic or cationic hydrophilic chain extender and the like to synthesize flame-retardant waterborne polyurethane. According to the method, since flame-retardant dihydric alcohol is used as one of chain extenders, flame-retardant dihydric alcohol ca partially or totally substitute other small molecular chain extenders, phosphorus-containing flame-retardant groups are controllable in content and difficult to migrate and are evenly distributed, and the flame-retardant property of waterborne polyurethane can be enduringly retained. According to the structural characteristics of selected flame-retardant dihydric alcohol, by virtue of one and a combination of two or more of flame-retardant groups, phosphorus in the flame-retardant groups can be alone located at a main chain, side chains or simultaneously located at the main chain and the side chains of the polyurethane molecule chain as desired so as to meet the requirements of different flame-retardant properties or other properties such as mechanics, toughness and plasticity.

The invention discloses a carbon-containing metal catalyst, a preparation method and an application thereof. The catalyst uses carbon fiber material as a carrier, and uses sodium borohydride, methanol or glycol as a reducing agent. One or several of chloroplatinic acid, chloroauric acid, and other metal precursors are mixed and then reduced to obtain a metal/carbon nanofiber catalyst for fuel cells, preferably with a metal loading amount being 10-60 wt %. The catalyst is high in initially electrochemically active surface area, and relatively small in current density attenuation during a 120-minute chronoamperometry test, has a current density higher than that of present commercial platinum catalyst/XC72R (40 %) during a whole electrochemical chronoamperometry test, and shows relatively high electrochemical activity, relatively high current density and relatively superior electrochemical stability. The catalyst show extremely high resistance to carbon monoxide toxicity.

The invention discloses a phosphorus-containing and nitrogen-containing expansion type flame-retardant polymer and a preparation method thereof. The preparation method is characterized in that: the phosphorus-containing and nitrogen-containing expansion type flame-retardant polymer is prepared by solution polycondensation reaction or melt polycondensation reaction of diphosphorus acylchloride or diphosphorus acylbromide and a diamine functional group-containing compound. The expansion type flame-retardant polymer comprises phosphorus-containing and nitrogen-containing phosphamide with a structure unit formula shown in the specifications, wherein n is an integer of from 1 to 200; R1 is oxygen or sulphur; and R is alkoxy, alkylthio, aryloxy or arylthio. The product of the invention has high compatibility with a high molecular material matrix, difficult transfer and excellent durability. The preparation method has the advantages of simpleness, easy control, high yield, wide sources of the required raw materials and easy industrialized production. A high polymer with a flame-retardant function can be directly prepared, or the high polymer serving as a flame-retardant additive can be added into various polyesters, polyamide, polyolefin, epoxy resin, polystyrene, high impact polystyrene or acrylonitrile butadiene styrene (ABS) polymer.

The invention discloses a heat-conducting silicone grease composition with low oil separation degree and a preparation method thereof. The heat-conducting silicone grease composition with low oil separation degree includes: by weight, 30-40 parts of vinyl silicone oil, 0.1-1.0 part of hydrogen-containing silicone oil, 0.05-0.1 part of an inhibitor, 0.01-0.05 part of platinum-vinyl siloxane complex, and 100-500 parts of heat-conducting filler. The silicone oil in the heat-conducting silicone grease composition with low oil separation degree is difficult to transfer, and the oil separation degree is less than 0.05% (200 DEG C, 24h, HG/T 2502). The composition has secular stable thermolysis when using in the electron component, and has no harmful effect on the electron component because of the transference of the silicone oil.

The invention relates to the field of high polymer materials, in particular to an antistatic master batch for polyester films and a preparation method of the antistatic master batch. The invention provides the antistatic master batch and the preparation method thereof so as to overcome the defects that the existing antistatic agent is incompatible with polyester materials and is easily precipitated on the surface of a film so that the antistatic effect of the film is reduced, and large adding quantity is required so that the physical performance of the film is affected. The antistatic master batch provided by the invention comprises 100 portions of polyester chip, 5-70 portions of nanometer antistatic agent and 0.1-5 portions of antioxidant. The preparation method of the antistatic master batch provided by the invention comprises the steps of mixing raw materials by melting and then extruding and granulating. The antistatic master batch provided by the invention has the advantages of good compatibility with the film, difficulty in transfer, small adding quantity in the polyester films and good antistatic effect. The preparation method of the antistatic master batch has the advantages of simple process and easiness in operation.

The invention discloses a multilayer compound wick material. The multilayer compound wick material comprises a non-woven fabric layer, wherein the upper surface and the lower surface of the non-woven fabric layer are respectively scattered with a wicking resin to form an upper wicking resin layer and a lower wicking resin layer, the upper wicking resin layer and the lower wicking resin layer are adhered with an upper wicking paper layer and a lower wicking paper layer formed by wicking paper through a hot melt adhesive respectively, and the non-woven fabric layer, the upper wicking resin layer, the lower wicking resin layer, the upper wicking paper layer and the lower wicking paper layer are compound-molded through roll compacting. The multilayer compound wick material has the advantages of high wicking time, small liquid reverse osmosis amount, large liquid storage capacity, lasting liquid storage time, dry and comfortable surface, and no skin dipping; a technology for producing the multilayer compound wick material has the advantages of simple process and less operation; and the multilayer compound wick material can be widely used as a main wicking material in infant and adult diapers and urine pads, a wicking material of women's sanitary wicking pads, and clinical nursing and health articles.

The invention discloses a polypropylene/polylactic acid/starch composite material which is prepared from the following ingredients by weight percent: 15-30% of polypropylene, 35-50% of polylactic acid, 20-35% of diisocyanate modified starch, 5-10% of vegetable oil multi-element alcohol and 5-10% of compatilizer. According to the polypropylene/polylactic acid/starch composite material, polypropylene, polylactic acid, diisocyanate modified starch, the vegetable oil multi-element alcohol and the compatilizer are combined together to generate better interfacial compatibility, and the ingredients bring the synergistic effect into play, so that the polypropylene/polylactic acid/starch composite material has excellent mechanical properties, can be used for preparing a film, disposable tableware and the like, and belongs to degradable biological materials. The invention further discloses a preparation method of the polypropylene/polylactic acid/starch composite material. The preparation method is simple, easy to control, strong in operability, low in production cost and easy for industrial production.

The invention provides an ultraviolet UV resistant polyethylene glycol terephthalate PET film; an UV absorber for absorption of different bands of ultraviolet is mixed into a PET master batch of the PET film, the UV absorber is a mixture including an UV absorber A and an UV absorber B, the UV absorber A is a benzotriazole UV absorber, the UV absorber B is a hindered amine UV absorber, the weight of the UV absorber A is 50%-80% of the weight of the UV absorber B, and the adding amount of the UV absorber A and the UV absorber B accounts for 2.4%-5.1% of the total weight of a base material layer. The PET film can hinder more than 98% of ultraviolet ray with the wavelength of 290nm-400nm, and according to a method, the UV absorber and the PET master batch are mixed for heating and melting, and then the PET film is formed by film pulling, so that the problem that the visual effect is affected for the reason that a PET film in the prior art has color can be solved.

The present invention relates to a thermal stability improved polyformaldehyde resin composition and a preparation method thereof. The preparation method comprises: adding 91.8-96% by weight of a polyformaldehyde resi, 0.6-2% by weight of a hyperbranched polyester, 0.2-0.6% by weight of a main antioxidant, 0.1-0.3% by weight of an secondary antioxidant, 0.1-0.3% by weight of a formic acid absorber, and 3-5% by weight of a lubricant to a high-speed mixer to mix, and adopting an exhaust type co-rotating twin screw extruder to carry out melt mixing and extrusion granulation to prepare the thermal stability improved polyformaldehyde resin composition, wherein a rotation speed of the screw is 210-280 rotation/min, and a material cylinder temperature is 160-190 DEG C. Compared with the composition in the prior art, the composition of the present invention has the following characteristics that: formation of excessive mold scale and formaldehyde gas during a mold molding processing process can be avoided, product discoloration can be inhibited, and excellent thermal stability is provided.

The invention relates to an intumescent flame retardant polypropylene composite material and a preparation method thereof. The preparation method is characterized by comprising the following steps: adding 60-85% of polypropylene and 0-5% of a lubricating agent into a high-speed mixer for dispersing at a high speed for 2-5 minutes so as to obtain a mixture; mixing the mixture with 15-35% of an intumescent flame retardant and 0.1-0.5% of an antioxidant for 5-20 minutes so as to obtain an intumescent flame retardant mixture; and performing extrusion pelletizing on the intumescent flame retardant mixture by using a twin-screw extruder or uniformly mixing by using a double-roller mixer, thereby obtaining the intumescent flame retardant polypropylene composite material. The intumescent flame retardant polypropylene composite material has the advantages that the heat resistance and water resistance of the flame retardant are improved; due to the structural design and adjustment of a char-forming agent, the char-forming agent has a certain beta-crystal nucleation effect, so that a certain beta crystal can be formed by the polypropylene composite material. Therefore, the impact property and bending property of the composite material are improved, and the composite material is low in water solubility and difficult to migrate.

The invention discloses a ferrocene-DOPO biradical polyester type flame retarding and smoke suppressing agent and a preparation method of the ferrocene-DOPO biradical polyester type flame retarding and smoke suppressing agent. The preparation method of the polymer is as follows: putting 10-(2,5-dyhydroxyl phenyl)-9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide into a reactor, adding a solvent,stirring for 5-10 minutes, adding an acid-binding agent; taking R1,R2'-ferrocene oxalyl chloride, adding the solvent, mixing, adding into the reactor dropwise, thermally insulating, stirring and reacting for 1-15 hours at the temperature of 0-50 DEG C under the protection of nitrogen after finishing adding dropwise; pouring a liquid obtained after the reaction into a precipitator while stirring, wherein the volume of the precipitator is 5-10 times that of the liquid, precipitating a yellow solid, carrying out suction filtration, washing a filter cake by using the precipitator, and drying to obtain the ferrocene-DOPO biradical polyester type flame retarding and smoke suppressing agent. The ferrocene-DOPO biradical polyester type flame retarding and smoke suppressing agent can be used to retard flame and suppress smoke of high polymer materials like polyolefins and epoxy resins.

The invention discloses an artificial leather manufacturing method adopting TPU (thermoplastic urethane) to plasticize PVC (polyvinyl chloride) and reducing use of a plasticizer. According to the method, 80-90 parts of PVC powder, 3-5 parts of a stabilizer, 50-60 parts of the plasticizer, 10-20 parts of TPU, 2-3 parts of a foaming agent, 5-10 parts of filler and an appropriate quantity of a colorant are mixed uniformly, and an artificial leather product is prepared with a traditional calendering process. PVC and TPU are all polar macromolecules and have good compatibility; the TPU macromolecules contain both soft segments and hard segments, the elasticity modulus of the TPU macromolecules is between that of plastics and that of rubber, the TPU macromolecules can still keep better elasticity in a relatively wide temperature range and further have good performance of low-temperature resistance, solvent resistance, heat resistance and the like; when the TPU is used for plasticizing PVC, the glass-transition temperature of a PVC/TPU blended material is reduced remarkably, the heat resistance is improved, and 30%-40% of the use quantity of a micromolecular plasticizer can be reduced; TPU adopts the macromolecules, is not easy to transfer and has lasting plasticizing effect; besides, polar groups such as epoxy groups, ester bonds and the like in the plasticizer and urethane groups in the TPU macromolecules can form a hydrogen bond or dipole interaction, and accordingly, the transference resistance of the plasticizer is further improved.

The invention discloses a carbon-carrier precious metal catalyst for fuel cell, a preparation method thereof and an application thereof. The catalyst uses band-shaped nanometer carbon as the carrier, sodium borohydride, methanol or glycol as a reducing agent, and co-reduces the band-shaped nanometer carbon and the precious metal acid or the precious metal salts to obtain the precious metal/band-shaped nanometer carbon catalyst for the fuel cell, preferably a platinum loading amount being 10-60 wt %. The catalyst is high in initial electrochemical active surface area, relatively small in current density attenuation during a chronoamperometry test, and relatively high in current density during an electrochemical timing current test compared with that of present catalysts, and shows relatively high electrochemical activity, relatively high current density and relatively excellent electrochemical stability.

The invention discloses a hybrid filler load type anti-aging agent, and a preparation method and application thereof. The method comprises the following steps that (1) hybrid fillers and a silane coupling agent are mixed; stirring reaction is performed for 10 to 24h at 70 to 90 DEG C; after drying, an intermediate product is obtained; (2) the intermediate product in the step (1) and N-phenyl p-phenylenediamine (RT) are mixed; stirring reaction is performed for 8 to 12h at 50 to 70 DEG C; after drying, the hybrid filler load type anti-aging agent is obtained. The hybrid filler load type anti-aging agent can obviously reduce the volatile migration phenomenon of micromolecule anti-aging agents in a rubber base body, has a better anti-aging effect than that of an ordinary ammonia anti-aging agent 4010NA, and has wide application prospects in the field of rubber.

The invention discloses a preparation method for double-emission waterborne polyurethane capable of emitting fluorescence and phosphorescence synchronously. The preparation method is characterized in that a common small-molecular dihydric alcohol chain extender is replaced with part or all of double-emission dihydric alcohol with a fluorescence and phosphorescence double-emission chromophore, waterborne polyurethane is synthesized, and prepared waterborne polyurethane can perform a fluorescence and phosphorescence double-emission function. Waterborne polyurethane, prepared according to the preparation method, can emit fluorescence and phosphorescence synchronously, is low in cost, easy to process, low in possibility of migration of the double-emission chromophore, and lasting and stable in light emitting performance, and has no harm to environment, the content of the fluorescence and phosphorescence double-emission chromophore in a polyurethane molecular chain can be controlled to be 1-20 wt%, the quantum yield of the fluorescence and phosphorescence double-emission chromophore can reach 81%, and double-emission waterborne polyurethane has a potential application value in the field of organic electroluminesence display, and can be used for further developing a detection device for oxygen and organic solvents.