30results about How to "Migration resistant" patented technology

The invention relates to a preparation method of a mercapto-alkene polymer flame-retardant system. Polysiloxane and a carbon nano tube belong to fire retardants, and have flame retardant property; according to the preparation method provided by the invention, the polysiloxane is grafted on the carbon nano tube through a chemical bond; the flame retardant properties of the polysiloxane and the carbon nano tube are put into a full play due to the synergistic effect generated between the polysiloxane and the carbon nano tube; meanwhile, ethylene on the polysiloxane is also formed in the polysiloxane-grafted carbon nano tube, and then can participate in copolymerization of mercapto-alkene, so as to form a flame-retardant system; the char-forming property and the flame-retardant property of the polymer can be improved by phenyl in the polysiloxane in a combustion process, so that the flame-retardant property of the flame-retardant system is further improved; the prepared flame-retardant system has the advantages of being stable in structure, migration-resistant, friendly to environment and harmless; the overall structure of the flame-retardant system can be regulated and controlled by adjusting the proportions of various reactants, so as to adjust the flame-retardant property of the product according to the requirements.

The invention discloses a polypropylene composite material and a preparation method thereof. The composite material comprises the following raw materials in parts by weight: (1) 35-85 parts of polypropylene; (2) 5-35 parts of a toughening agent; (3) 5-40 parts of a mineral filler; (4) 0.3-15 parts of a composite antistatic agent, wherein the composite antistatic agent is composed of a polymer permanent antistatic agent and an inorganic permanent antistatic agent, and the composite material can also comprise a porous adsorbent, an acid acceptor, an antioxidant and a light stabilizer. Accordingto the invention, the polypropylene composite material disclosed by the invention adopts the composite antistatic agent, has low volume resistivity, and can meet the antistatic and dustproof requirements of automotive trim materials; by adding deodorants with different smell removal mechanisms, the smell of the product is low, so the product can meet the requirements of automotive trim materials for smell; and the polypropylene composite material has characteristics of excellent mechanical properties, simple preparation process, good processability, low cost, and facilitation of large-scale commercial production.

The invention discloses polyurethane-based black polymeric dye, a preparing method and application. The preparing method includes the steps that polymer polyol is heated to 90-110 DEG C and dehydrated for 1-2 h with the vacuum degree smaller than or equal to 0.1 MPa, and nitrogen is introduced for protection; the product is cooled to 60-80 DEG C, and isocyanate and a catalyst are added to react for 1-3 h at the temperature of 60-90 DEG C; micromolecular black dye, solvent and a catalyst are added and react for 3-8 h at the temperature of 60-90 DEG C to prepare a polyurethane prepolymer with black dye; chain extender is added and reacts for 1-3 h at the temperature of 50-90 DEG C; finally, the solvent is removed in vacuum. According to the prepared polyurethane-based black polymeric dye, the micromolecular black dye is directly added into the polyurethane chain, the content of the micromolecular black dye in the polyurethane can be adjusted according to needs, and therefore dye amount is controllable to meet requirements of different dyeing processes. The polyurethane-based black polymeric dye can be mixed with other kinds of dye for color matching and is suitable for various kinds of color and luster dying with a wide color spectrum.

The invention belongs to the technical field of macromolecule materials, and discloses a transparent permanent antistatic PMMA material and a preparation method and application thereof. The material is prepared from, by weight, 50-110 parts of PMMA, 2-45 parts of an antistatic agent, 0-8 parts of a flexibilizer, 0-1 part of a stabilizer and 0.1-1 part of an antioxygen. The prepared transparent permanent antistatic PMMA material has the advantages that preparation is simple, forming and processing performance is good, and the material can be adopted for preparing dust-proof and antistatic workpieces or packing materials through processing forming modes of injection molding, curtain coating and the like.

The invention discloses a polyurethane based fluorescent whitening agent and a preparation method thereof. The preparation method includes the steps that polymer polyalcohol is heated, vacuum dewatering is conducted for 1-2 hours, nitrogen gas is introduced for cooling, and diisocyanate, solvent and a catalyst are added for a reaction; then, an organic small molecular fluorescent whitening agent body is added, a reaction is conducted, and polyurethane prepolymer with the fluorescent whitening agent body is prepared; water-based chain extender is added into the polyurethane prepolymer, and a reaction is conducted; then, solvent is added to dilute the mixture to certain viscosity, a salt-forming agent is added, and a polyurethane ionomer is formed; the polyurethane ionomer is transferred into an emulsification reactor, then emulgator and water are added, then solvent removal is conducted, and water-based polyurethane based fluorescent whitening emulsion is obtained. The polyurethane based fluorescent whitening agent has the advantages of being high in fluorescence quantum yield, resistant to light, resistant to heat, resistant to washing, resistant to wear, resistant to migration, resistant to wet processing, prone to film formation, capable of being processed and the like and further has the advantages of being good in whitening effect, convenient to use, low in cost, free of toxin, environmentally friendly and the like.

The invention provides a HTPB (hydroxy-terminated polybutadiene) based casting mixed explosive formula with improved process property. The HTPB based casting mixed explosive formula is a casting mixedexplosive formula which takes HTPB as a binder, and comprises main explosive, a HTPB binder, an oxidant, metal fuel, an anti-aging agent, a curing catalyst and a curing agent, and further comprises aplasticizer and a process aid; the plasticizer is naphthenic oil, and accounts for 3%-9% of the mixed explosive in percentage by mass; the process aid is mixed from one or two of liquid-state lecithin, dimethylsilicone and a stearate compound, and accounts for 0.1%-1% of the mixed explosive in percentage by mass. The plasticizer provided by the invention reduces viscosity of mixed explosive slurry, and is free of a plasticizer migration phenomenon; and the process acid can effectively moisten explosive crystals, so that surface coating of explosive particles by the binder is promoted and mobility of the explosive slurry is obviously improved, and moreover, the process acid does not need to be removed in a casting process, and mechanical properties of the explosive in the storage process are not affected.

The invention relates to the technical field of macromolecular flame-retardant charring agents applied to polymer materials, and discloses an organic-inorganic hybrid efficient synergistic charring agent and a preparation method thereof, and the structural formula of the organic-inorganic hybrid efficient synergistic charring agent is shown in the specification. According to the charring agent, through nucleophilic substitution, two chlorine atoms on cyanuric chloride are sequentially substituted by p-xylylenediamine at different temperatures to form a linear macromolecular triazine intermediate taking p-xylylenediamine as a chain extender, then the temperature is increased, and the step of substituting chlorine on an upper side group of an intermediate is carried out by nano hydrotalcite and gamma aminopropyltriethoxysilane which are connected through hydroxyl according to the same principle as p-xylylenediamine and cyanuric chloride substitution modes. The charring agent has the characteristics of good charring property, high molecular weight, migration resistance, high temperature resistance and no influence on the mechanical properties of a matrix material, solves the problem that the charring property with good compactness and complete morphology cannot be formed due to the anti-migration property of a triazine derivative as the charring agent, and is applied to thermoplastic polyester elastomers.

The invention discloses a TPU elastomer composition based on a dialkyl dithiohypophosphite composite flame retardant system for electric wires and cables. The TPU elastomer composition comprises 65-90wt% of a TPU matrix material, 9-30wt% of a composite flame retardant system and 0.1-5wt% of an assistant. The composite flame retardant system comprises dialkyl dithiohypophosphite and a carbon-forming component. The dialkyl dithiohypophosphite is shown in the formula (I) and in the formula, R1 and R2 independently represent a linear alkyl group or a branched alkyl group, M represents Mg, Ca, Al,Sb, Sn, Ge, Ti, Fe, Zr, Zn, Ce, Bi, Sr, Mn, Li, Na, K, H or NH4 and m is 1-4. The cable material prepared from the TPU elastomer composition has the characteristics of no molten droplet, high flame retardancy, migration resistance, softness, wear resistance and oil resistance.

The invention belongs to the technical field of medicine, and in particular relates to a PVC flexible pipe for a low-frequency electromagnetic physiotherapy pad, a preparation method of the PVC flexible pipe, and the electromagnetic physiotherapy pad. The PVC flexible pipe comprises the following preparation raw materials in parts by weight: 50 to 100 parts of PVC resin, 0.2 to 1 part of a stabilizer, 1 to 3 parts of hexamethylphosphoramide, 1 to 3 parts of epoxidized soybean oil and 20 to 40 parts of a plasticizer, wherein the plasticizer consists of acetyl-tri-n-butyl citrate and O-methyl acetylricinolate according to a weight ratio of 1:(0.01-0.06). The PVC flexible pipe provided by the invention has excellent mechanical property and chemical property, has the advantages of safety, environmental friendliness, migration resistance and processing and forming simplicity, and is suitable for vigorous popularization and application. The invention also provides the low-frequency electromagnetic physiotherapy pad for pain rehabilitation treatment or thoracic vertebra prevention. The low-frequency electromagnetic physiotherapy pad can regulate the system function and the internal organ function of an organism and completely change the pathological environment in the organism to enable the organism to generate super-ego repairing capability.

The invention relates to a preparation method of a sulfydryl graphene copolymerized mercapto-alkenyl polymer flame-retardant system, which has the advantages of stable structure and migration resistance by virtue of a stable preparation process of starvation-state semi-continuous emulsion polymerization and extremely strong reaction activity of sulfydryl in a modified graphene structure. No precipitation phenomenon occurs after long-term use; moreover, the graphene is a two-dimensional nano carbon material and has good compatibility and dispersity with a matrix, other properties of the matrixare not lost under the existing addition concentration, and the mechanical properties are also improved to a certain extent; according to the prepared flame-retardant system, the mercapto-alkenyl polymer serves as a matrix, mercapto-graphene serves as a flame retardant, the mercapto-alkenyl polymer and the mercapto-grapheneare combined through chemical bonds to form a reaction type flame-retardantsystem, and the graphene flame retardant has excellent heat and oxygen insulation capacity in the combustion process, is extremely high in flame-retardant efficiency and has a very good flame-retardant effect under the condition that the adding amount is 0.2-1 wt%.