57results about How to "Good resistance to extraction" patented technology

The invention discloses a preparation method for a reactive polyamidoamine dendrime rubber antioxidant. The preparation method comprises the following steps: fully dissolving polyamidoamine in an organic solvent until polyamidoamine is in a uniform state, dropwise adding a reactant pre-dissolved in the organic solvent while stirring, reacting at 10-60 DEG C for 0.5-24 hours, and performing reduced pressure distillation to remove the organic solvent to obtain a reactive polyamidoamine rubber antioxidant with unsaturated double bonds, which is the reactive polyamidoamine dendrime rubber antioxidant, wherein the reactant is unsaturated carboxylic acid, unsaturated carboxylic ester, an epoxy compound containing double bonds or unsaturated anhydride. The antioxidant prepared by the method can be crosslinked with a rubber matrix and has remarkable advantages of good antioxidant effect, high relative molecular weight, good compatibility with a polymer matrix, extraction resistance, good environmental protection and the like.

The invention discloses a polyvinyl chloride sealing strip composition for a refrigerator, belongs to the field of processing and application of macromolecular materials, and mainly relates to a polyvinyl chloride sealing strip composition for a refrigerator. The polyvinyl chloride sealing strip composition is prepared from the following components in parts by weight: 100 parts of polyvinyl chloride, 35-55 parts of a plasticizer, 20-35 parts of modified ethylene vinyl acetate copolymer, 28-42 parts of a thermoplastic polyurethane elastomer, 2-8 parts of a thermal stabilizer, 0.5-1.2 parts of a lubricant, 0.4-0.8 part of an antioxidant and 9-44 parts of a filling agent. A polyvinyl chloride sealing strip, produced from the polyvinyl chloride sealing strip composition, for a refrigerator is cold-resistant and oil-resistant, has good elastic resilience and durability, and is of great significance in energy conservation and consumption reduction.

The invention relates to the field of a polymer type anti-oxidant, and provides a polymer type anti-oxidant, a preparation method thereof, and an application thereof. According to the invention, under the effect of a catalyst dibutyltin dilaurate, hydroxyl-terminated polybutadiene and isophorone diisocyanate are subject to a reaction under a temperature of 30 to 50 DEG C, such that an adduct is synthesized; the adduct is subject to a reaction with a low-molecular bisphenol anti-oxidant under a temperature of 60 to 80 DEG C, such that the polymer type anti-oxidant is prepared. The thermal oxidative aging resistance of the polymer type anti-oxidant is better than that of the corresponding low-molecular bisphenol anti-oxidant. Also, the polymer type anti-oxidant has an excellent extraction resistance. The anti-oxidant can be widely applied in rubber materials.

The invention relates to a preparation method for an epoxy polyester plasticizer, belonging to the technical field of chemical synthesis. The preparation method comprises the following steps of: firstly carrying out reaction on an unsaturated dicarboxylic anhydride and a saturated dibasic alcohol under catalysis action to generate a polyester with a certain molecular weight, and then carrying out epoxidation reaction on the polyester under the conditions of introducing an oxygen source and using formic acid as a carrier to obtain the epoxy polyester plasticizer with a certain epoxide number. The product provided by the invention has the characteristics of light color and luster, low residual iodine value and high heat stability and are basically nontoxic; and the reaction process is short, is easy to operate, is low in energy consumption and cost, and meets pollution-free and clean production process.

The invention discloses a preparation method of glyceryl polyester used as a PVC (Polyvinyl Chloride) plasticizer and belongs to the technical field of chemical synthesis. The preparation method comprises the following steps of: synthesizing by a one-step process under the combined action of a catalyst, an end-capping reagent and a water-carrying agent by using cheap bio-based glycerol, non-orthophthalic binary acid (for example hexahydrophthalic anhydride, adipic acid or the like) as the materials; and carrying out the post-treatment processes including dehydration poly-condensation, reduced pressure distillation and the like to obtain the poly-binary acid glyceride plasticizer. The glyceride plasticizer has a final acid value of 0.7mgKOH.g<-1>-2mgKOH.g<-1>, an esterification rate higher than 97%, relative molecular weight of about 5000, a dispersion coefficient of 1.00-1.13, appropriate viscosity and stable physical and chemical characteristics; the glyceride plasticizer is added to the PVC according to a certain formula to be refined into a PVC plastic test block, so that application performances including heat stability, drawing resistance, tensile performance and the like of the test block are tested; and the test block has good heat stability, tensile performance and excellent mobility resistance. The preparation method of the glyceryl polyester used as the PVC plasticizer is low in material price, simple in preparation process, low in energy consumption, excellent in product performance and good in application prospect.

The invention relates to a rubber compound, a rubber product, a hydraulic rubber hose and a preparation method of the hydraulic rubber hose. The rubber compound comprises (i) hydrogenated butadiene-acrylonitrile rubber, (ii) thermal cracking carbon black and (iii) other selectable matching agents. A rubber material prepared by the rubber compound has excellent oil resistance and temperature resistance.

The invention discloses a new type green environmental protection type plastic plasticizer, which belongs to the technical field of plastic plasticizers and has the chemical name of maleic acid tributyl citrate diester. The invention also discloses a preparation method of the compound. Tributyl citrate and trans-maleic acid chloride are synthesized into a whole by a converging method, thereby effectively preparing a final product of the maleic acid tributyl citrate diester. The Maleic acid tributyl citrate diester as the plastic plasticizer has the advantages of small volatility, high stability, good anti-migration, good anti-extraction performance, good low-temperature flexibility, safety and no toxicity.

The invention relates to a non-toxic environmentally friendly nadic anhydride polyester plasticizer and a preparation method thereof, and relates to the technical field of polyester plasticizers. The non-toxic environmentally friendly nadic anhydride polyester plasticizer comprises nadic acid polymethyl propylene glycol ester, nadic acid poly-1,4-butanediol ester, nadic acid poly-diglycol ester and nadic acid poly-triethylene glycol ester. The preparation method comprises the following steps that: nadic anhydride and diol are subjected to esterification and polycondensation reactions at a temperature of 170 DEG C to 220 DEG C under the conditions that 2-ethylhexanol is used as an end-capping agent, tetra-n-butyl titanate is used as a catalyst and cyclohexane is used as a water-carrying agent; and after the completion of the reactions, excess alcohols and micromolecular esters are removed by reduced pressure distillation to finally obtain a polyester product. The product has an acid value reduced to 0.31-0.53mgKOH . g<-1>, an iodine value of 71.98% - 74.35%, a saponification value of 501.9-593.4mgKOH . g<-1>, viscosity of 801.9-846.5mPa. S, a number average molecular weight of 7052-8612g . mol<-1>, and an esterification rate of 99.68% - 99.81%. The product is non-toxic and environmental friendly, the preparation process is short, the energy consumption is low, 'three wastes' (waste gas, waste water, solid waste) are not generated, and the preparation method meets the green process requirements.

The invention relates to an aqueous PU (Poly Urethane) synthetic leather and a manufacture method thereof. The aqueous PU synthetic leather comprises a base cloth layer, wherein the base cloth layer is coated with an aqueous PU foaming layer. The manufacture method for the aqueous PU synthetic leather comprises the following steps: preparing slurry, and putting the slurry into a foaming machine; regulating the ratio of the slurry and air inflow to determine the size of a required bubble hole; adding the base cloth; and finishing processing the aqueous PU synthetic leather by the working procedures of heating, ironing, loading, sending into an oven. The synthetic leather manufactured with the manufacture method has the advantages of good air permeability, excellent extraction resistance, yellowing resistance, ultraviolet radiation resistance, ageing resistance, mildewing resistance, hydrolysis resistance, cold and bending resistance, high abrasive resistance, simple and clear manufacture technology and obvious energy-saving and consumption reduction effect, and the fire resistance reaches the international advanced standard.

The invention relates to a sealing strip, in particular to a low-VOC polyvinyl chloride/powder nitrile butadiene rubber thermoplastic elastomer sealing strip and a preparation method thereof. The low-smoke zero-halogen flame-retardant sealing strip is prepared from the following raw materials in parts by weight: 100 parts of PVC, 10 to 60 parts of PNBR (powder nitrile butadiene rubber), 10 to 70 parts of plant oil based polyester plasticizer, 5 to 30 parts of epoxidized soybean oil, 10 to 80 parts of calcium carbonate superfine powder, 10 to 30 parts of carbon black, 1 to 5 parts of stearic acid, 2 to 10 parts of zinc oxide, 3 to 8 parts of calcium and zinc composite stabilizer, 0.5 to 3 parts of bis(1-(tert-butylperoxy)-1-methylethyl)-benzene and 0.5 to 2 parts of antiager 4010NA. The low-VOC polyvinyl chloride/powder nitrile butadiene rubber thermoplastic elastomer sealing strip disclosed by the invention has the characteristics of good resilience, low VOC emission, excellent comprehensive performance and the like and is suitable for use in industries of automobiles, buildings, cables, household appliances and the like.

A disclosed anti-ageing shock-resistant modified butyl-rubber cable material comprises the following raw materials: butyl rubber, natural rubber, poly(4-methyl-1-pentene), stearic acid, zinc oxide, 2,5-dimethyl-2,5-di-(benzoyl peroxy)hexane, carbon black, carbon nanotube, modified white carbon black, polyethylene micro powder, 2,4-di-tert-butyl-6-cycloheximide phenol, 3,5-di-tert-butyl-4-hydroxylbenzyl methyl ether, promoter CZ, promoter TMTD, propanediol sebacate polyester, coumarone resin, di-(2-ethylhexyl)4,5-epoxy tetrahydrophthalate, N-[3-(trimethoxysilyl)propyl]ethylenediamine, isopropyl tri(dioctylpyrophosphate) titanate, and calcium stearate. The anti-ageing shock-resistant modified butyl-rubber cable material is fast in curing speed, high in strength, and excellent in ageing resistance and impact resistance.

The invention relates to environment-friendly sealing strips, and in particular to an environment-friendly type high-resilience PVC (Polyvinyl Chloride)/NBR (Nitrile-Butadiene Rubber)/BR (Butadiene Rubber) elastomer sealing strip and a preparation method thereof. The environment-friendly type high-resilience PVC/NBR/BR elastomer sealing strip is mainly prepared from the following raw materials: 100 parts of PVC, 10 to 70 parts of NBR, 10 to 50 parts of modified BR, 10 to 60 parts of a polyester plasticizing agent, 5 to 20 parts of epoxidized soybean oil, 10 to 60 parts of superfine white carbon black, 10 to 40 parts of carbon black, 1 to 3 parts of stearic acid, 2 to 8 parts of zinc oxide, 2 to 6 parts of a calcium-zinc composite stabilizing agent, 1 to 5 parts of ditert-butyl cumene peroxide and 1 to 3 parts of an anti-aging agent 4010NA. The environment-friendly type high-resilience PVC/NBR/BR elastomer sealing strip disclosed by the invention has the characteristics of good resilience, low mobility, good comprehensive performance and the like, and is suitable for industries such as automobiles, buildings, electric wires and cables and household appliances to use.

The invention provides a weather-resistant halogen-free flame-retardant polypropylene material as well as a preparation method and application thereof. The weather-resistant halogen-free flame-retardant polypropylene material is prepared from the following raw materials in parts by mass: 55-75 parts of polypropylene resin, 20-38 parts of halogen-free flame retardant, 1-3 parts of a flame-retardantsynergist, 0.5-0.8 part of a lubricant, 0.5-1.2 parts of an antioxidant and 0.3-1 part of a light stabilizer; wherein the halogen-free flame retardant comprises microcapsule ammonium polyphosphate and a charring agent. The weather-resistant halogen-free combustion-supporting polypropylene material has a high flame retardant performance (UL94 V-0 and UL1694 SC-0 with a thickness of 0.75 mm), and after being soaked in water at 70 DEG C for 7 days, at least 90% of mechanical properties are still maintained. After the material is irradiated by a xenon lamp for 1000 hours, at least 90% of mechanical properties are maintained. In addition, the preparation method is simple and easy to control. The material is applied to a soft core of decorative lighting.

The invention discloses a manufacturing process of a high-weather-resistance reflective film. The reflective film comprises a transparent protective layer, a microprism layer, a packaging layer, a pressure-sensitive adhesive layer and a release layer which are sequentially arranged from top to bottom, the transparent protective layer is prepared from the following raw materials in parts by weight:polyvinyl chloride paste resin, acetyl tributyl citrate, tributyl citrate, di(2ethylhexyl)phthalate, a plasticizer TXIB, a heat stabilizer, epoxidized soybean oil, diatomite, titanium dioxide, lightcalcium carbonate, ground calcium carbonate, a foaming agent, a coupling agent, an impact modifier and zinc oxide. By limiting plasticizers such as acetyl tributyl citrate, tributyl citrate, di(2ethylhexyl) phthalate and a plasticizer TXIB to be matched with polyvinyl chloride paste resin, the transparent protective layer formed on a microprism is high in plasticizing efficiency, low in plasticizer mobility, good in cold resistance and extraction resistance and high in wear resistance, so that the weather resistance of the reflective film is improved, and the service life of the reflective film is prolonged.

The invention belongs to the field of light stabilizers and preparation thereof, and particularly relates to a high-molecular-weight low-alkalinity light stabilizer and preparation and application thereof. The structure of the light stabilizer is shown as a compound I. The light stabilizer has high molecular weight, good extraction resistance, narrow molecular weight distribution and excellent light stability, volatilization and migration in the using process can be effectively prevented, the molecular weight is about 2000-10000, and the molecular weight distribution is below 2.0. The preparation method of the light stabilizer is simple, mild in synthesis condition, easy to operate, high in product yield, free of by-products, clean and environmentally friendly.

The invention discloses a high-rigidity glass fiber reinforced polypropylene material and preparation equipment and a preparation method thereof. The high-rigidity glass fiber reinforced polypropylenematerial consists of the following raw materials: homo-polypropylene, a compatilizer, an antioxidant, a lubricating agent, a nucleating agent and glass fibers. Meanwhile, the invention discloses theequipment for preparing the polypropylene material and a method for preparing the high-rigidity glass fiber reinforced polypropylene material by using the equipment. In addition, the invention furtherdiscloses application of the high-rigidity glass fiber reinforced polypropylene material. The polypropylene material has high bending strength and modulus, is excellent in anti-impact property and good in thermal stability, resists hydrolysis, and can be widely applied to automotive panels, washing machine drums, handles of thermal jugs and the like.

The invention discloses a citrate plasticizer and a preparation method thereof, and the preparation method of citrate comprises the following steps: firstly, citric acid and alcohol react to prepare citric acid triester, and then dianhydride acylation is carried out to prepare carboxyl-containing citric acid triester. After chlorination, the carboxyl-containing citric acid triester and the tris(2-ethoxyl) isocyanurate are subjected to esterification reaction to prepare triester citrate containing the isocyanurate. According to the present invention, the preparation method has characteristics of simple operation, wide raw material source and mild reaction condition, and meets the industrial production, the prepared triester citrate containing isocyanurate has a good plasticizing effect and excellent thermal stability, low-temperature flexibility, solvent extraction resistance, migration resistance and flame retardance, and can be widely applied to plastic rubber plasticizers.

The invention relates to the technical field of research, development and processing of fishing gear and discloses durable PVC (polyvinyl chloride) bionic bait. The bait is prepared from the components as follows: PVC, DHP (dihexyl phthalate), dibutyl sebacate, epoxidized soybean oil, tricresyl phosphate, citrate, diol fatty acid ester, dipentaerythritol, diol benzoate, zinc stearate, calcium stearate, ash calcium powder, talcum powder, an aluminate coupling agent, titanium dioxide and an antibacterial agent, the PVC is used as the main material, the rest components are added to enhance the performance of PVC, the PVC has excellent low-temperature resistance, the brittle temperature of a product can be decreased to subzero 70 DEG C-subzero 30 DEG C, the low-temperature softness is better, the heat resistance and weather resistance are higher, the service life of the bionic bait can be prolonged, the recycling rate is high, and the used inorganic antibacterial agent can be dispersed uniformly in the biotic bait and can play the antibacterial role for a long term.

The invention discloses an intramolecular compound antioxidant and a preparation method thereof. The obtained intramolecular compound antioxidant has good hydrolysis resistance, high oxidation resistance efficiency and dual effects of hindered phenol and phosphite antioxidants, can replace an existing compound system of hindered phenol and phosphite antioxidants and can meet the function requirement for antioxidants during synthesis and processing of ABS resin and polyolefin.