127results about How to "No migration" patented technology

The invention discloses a flame-retardant polyacrylate emulsion and a preparation method thereof. The flame-retardant polyacrylate emulsion consists of 100 parts of polyacrylate emulsion and 5-35 parts of flame retardant by weight parts, wherein the polyacrylate emulsion consists of ethylhexyl acrylate, butyl acrylate, methyl methacrylate, methacrylic acid, crylic acid, functional monomer, reaction emulsifier, emulsifier OP, ammonium persulfate and deionized water; the flame retardant consists of carbonized catalyst, carbonizer and expanding agent. The preparation method of the flame-retardant polyacrylate emulsion includes: utilizing the combined process of pre-emulsifying and seeding polymerizing and adding expansion flame retardant. The flame-retardant polyacrylate emulsion prepared by the preparation method has excellent flame retardancy, adhesivity, filming ability and stability and excellent waterproofness, and can be widely used in the industries of adhesives and coatings and the like.

The invention relates to the field of halogen-free flame-retardant electric wire cable shield materials, in particular to a flexible halogen-free flame-retardant polyphenyl ether electric wire cable shield material and a preparation method thereof. The flexible halogen-free flame-retardant polyphenyl ether electric wire cable shield material is characterized by comprising the following raw materials in percentage: 10 to 30 percent of polyphenyl ether resin; 15 to 35 percent of styrene elastomer; 5 to 10 percent of polyolefin; 8 to 15 percent of plasticizing agent; 3 to 8 percent of compatilizer; 15 to 25 percent of main flame retardant; 2 to 8 percent of synergistic flame retardant; 2 to 8 percent of smoke suppressant; 0.5 to 1 percent of lubricant; 0.5 to 1 percent of antioxygen; and 2 to 3 percent of masterbatch. The flexible halogen-free flame-retardant polyphenyl ether electric wire cable shield material has favorable mechanical property, flexibleness, flame retardant property, heat resistance and processability.

The invention relates to a halogen-free flame retardant polyurethane elastomer flame retardant and the preparation method. The flame retardant comprises the following components and contents (weight per cent): melamine-formaldehyde coating ammonium phosphate 30 per cent to 70 per cent, triethylol isocyanurate 10 per cent to 35 per cent, melamine cyanurate 5 per cent to 20 per cent, phosphonate 10 per cent to 20 per cent, organic silane coupling agent 0.1 per cent to 0.5 per cent and antioxidant 0.1 per cent to 0.8 per cent. The preparation method of the flame retardant comprises the process steps such as the mixture of the melamine-formaldehyde coating ammonium phosphate. Compared with the prior art, the invention overcomes the defect of harm of halogen flame retardant polyurethane elastomer on the environment and the human body, endows the materials with certain difficult-flammability, has good compatibility with the polyurethane and has no effect on the mechanical properties of the polyurethane.

The invention discloses a polysiloxane leather coating material, prepared of the below components: component A polysiloxane latex, wherein amine value of polysiloxane is 0.21-0.53, viscosity average molecular weight is 25,000-73,000, and solid content is 18-35%; component B polysiloxane-polyurethane copolymerized latex, wherein solid content is 18-35%; the weight ratio of components A to B is 2:1 to 5:1. The invention discloses a process method for preparing this painting material. After used, this painting material of the invention gives a leather warm high smoothness, thickness, silk-like soft handling and has good permanence; the process method of the invention has simple process flow, uses small amount of emulsifier and produces less pollutants.

The invention discloses a halogen-free flame retarding compounded system based on a phosphorus/aluminum compound. The compounded system, on the basis of total weight of 100%, includes 40-90% of diethyl aluminum hypophosphite, 10-50% of organic aluminum phosphite, and 1-10% of a zinc salt thermal stable compound. The organic aluminum phosphite is represented as the structural formula (I), wherein Ris selected from C1-C6 straight-chain saturated aliphatic hydrocarbon groups, C1-C6 straight-chain unsaturated aliphatic hydrocarbon groups or aryl groups. The invention discloses a novel halogen-free flame retarding compounded system based on the phosphorus/aluminum compound; the system has high flame retarding performance, is free of migration and has no corrosion on equipment, can be applied to glass fiber reinforced engineering plastic to produce halogen-free flame-retarding glass fiber reinforced engineering plastic, which is used for manufacturing parts of products in the field of electronics and electric appliances.

The invention discloses a masking tape containing a printing layer and a preparation method thereof. The masking tape comprises a substrate, wherein one side of the substrate is provided with an adhesive layer, and the other side of the substrate is sequentially provided with a printing layer and a release layer; the substrate is masking tape base paper impregnated by a hydroxy butadiene-styrene emulsion; the printing layer is a water-based ink; the adhesive layer is a water-based acrylate pressure-sensitive adhesive; and the release layer is a water-based release agent. All the raw materials are water-based materials, and thus, the production technique is environment-friendly; and the product has the advantages of stable performance, long shelf life, low production cost and high added value.

The invention discloses a halogen-free flame-retardant compounding system coordinated with organic aluminum phosphate. The compounding system comprises the following raw materials: in terms of a totalweight of 100%, 40-90% of aluminum diethylhypophosphite, 10-30% of organic aluminum phosphate, 1-20% of melamine metal phosphate and 1-15% of zinc stannate. The organic aluminum phosphate has a structural formula as shown in a formula (I) which is described in the specification. In the formula, R is selected from a group consisting of a straight-chain fatty acid saturated alkyl group with a carbon number of 1-6, a straight-chain fatty acid unsaturated alkyl group with a carbon number of 1-6 and an aryl group. The invention discloses the novel o halogen-free flame-retardant compounding systemcoordinated with organic aluminum phosphate. The halogen-free flame-retardant compounding system has the characteristics of high flame retardancy, no migration, no corrosion to equipment and the like,and can be applied to glass fiber reinforced engineering plastics to prepare halogen-free flame-retardant glass fiber reinforced engineering plastic materials used for the preparation of parts or products of electronic appliances.

The invention discloses a TPE material magnetic gasket for a refrigerator and a freezer, comprising a TPE elasticity gasket gum cover provided a magnetic strip which passes through the gum cover. The TPE elasticity gasket gum cover mainly comprises the following raw materials according to the parts by weight: 40 to 45 parts of SEBS, 15 to 18 parts of PP, 3 to 5 parts of PE, 25 to 30 parts of vash oil, 5 to 8 parts of CaCO3, 1.3 to 1.5 parts of lubricant, and 0.2 to 0.8 part of antioxidant. The magnetic gasket is applicable to the refrigerator, the freezer and other refrigerating equipment, and has the advantages of environmental protection, insensitiveness to adverse temperature changes, excellent sealing performance and elasticity maintenance, energy consumption, long service life and the like. The invention also provides a method for preparing the TPE material magnetic gasket, which has the advantages of simple process, being applicable to mass production and the like.

The invention relates to an aqueous macromolecular photoinitiator and a preparation method thereof. The general formula of the aqueous macromolecular photoinitiator is (i). The aqueous macromolecular photoinitiator prepared by the method has the photoinitiating efficiency equivalent to a corresponding micro-molecular photoinitiator and has better compatibility with an aqueous light-cured resin; carboxylate ions and sulfosalt ions exist in a molecular chain simultaneously, so the resin has better water solubility than an aqueous macromolecular photoinitiator only containing carboxylate ions; and in addition, the price of an introduced chain extender (4-aminobenzenesulfonic acid) used for sulfonic acid group is lower than that of a conventional aqueous functional monomer (dihydromethylpropionic acid), so that the cost of products is reduced and the industrial production is facilitated. At the same time, in the method, the chain is extended by using the functional monomer with photoinitiating function, so the content of photoinitiating radicals in the resin per gram is improved and the aqueous macromolecular photoinitiator has better photoinitiating efficiency than the aqueous macromolecular photoinitiator taking end radicals as the photoinitiating radicals.

The invention relates to an acrylate emulsion used for vacuum aluminum plating and laser embossing and a preparation method thereof. The emulsion comprises the following components in parts by weight: 1-6 parts of polymerizable carboxylic acid, 18-80 parts of methacrylate, 12-50 parts of acrylate, 5-20 parts of silicon-including cross-linkable monomer, 2-4 parts of polymerizable emulsifier, 0.3-0.7 parts of pH buffer agent, 0.3-0.7 parts of initiator, 0.4-2.5 parts of neutralizer and water, wherein the weight ratio of the water to the total weight of the polymerizable carboxylic acid, the methacrylate, the acrylate, the silicon-including cross-linkable monomer and the polymerizable emulsifier is (1-1.5):1. According to the method provided by the invention, the polymerizable emulsifier is used; the prepared acrylate emulsion does not include a micromolecular emulsifier; the migration of the emulsifier does not exist in a later film forming process; furthermore, polymerizable silane is introduced in a polymerization process; and the degree of cross linking of the acrylate emulsion is improved, so as to give the advantages of high temperature resistance, no migration of the emulsifier, incapability of causing the filling in of a molded blackboard, and the like, to an emulsion film.

The invention discloses a nitrogen-free halogen-free flame-retardant complex system for glass fiber reinforced nylon. The nitrogen-free halogen-free flame-retardant complex system comprises the following raw materials in percentage by weight: 60-90% of diethyl aluminum hypophosphite, 9-30% of aluminophosphite and 1-10% of zinc stannate. According to the nitrogen-free halogen-free flame-retardant complex system for glass fiber reinforced nylon disclosed by the invention, the nitrogen-free halogen-free flame-retardant complex system has the characteristics of being highly flame-retardant, migration-free, non-corrosive to equipment and the like, and the defects of the existing phosphorus and nitrogen complex flame-retardant system based on diethyl aluminum hypophosphite applied to the glass fiber reinforced nylon material are overcome. Moreover, the nitrogen-free halogen-free flame-retardant complex system can well adapt to a glass fiber reinforced nylon material system, and a halogen-free flame-retardant glass fiber reinforced nylon material with excellent overall performance is obtained.

The invention relates to a halogen-free flame-retardant environment-friendly covered polyolefin yarn fabric and a preparation method thereof. The fabric is formed by weaving covered threads and has warp and weft structures; the covered threads comprise polyester fibers and halogen-free flame-retardant environment-friendly polyolefin composite materials covering the surfaces of the polyester fibers; the covered threads are 0.3-0.4 millimeter in diameter, rectangular or square gaps are reserved between the warp structures and the weft structures, and the aperture ratio is 2 to 10 percent; the halogen-free flame-retardant environment-friendly covered polyolefin yarn fabric is 0.55-0.75mm in total thickness and 350-420g/m<2>. The invention also provides a preparation method for the fabric. The fabric has the characteristics of sunshading, ultraviolet resistance, flame retardancy, high color fastness and the like of similar PVC (polyvinyl chloride) substrate fabrics, and also has the advantages of no halogen, environment friendliness, low smoke density during combustion, high self-cleaning property, high chemical stability, light weight, high air permeability and the like.

The invention provides a polymerizable water-soluble benzophenone type photoinitiator and a preparation method thereof. The preparation method comprises the following steps: enabling 3,3',4,4'-benzophenone tetracarboxylic dianhydride to react with an acrylate type monomer containing active hydrogen; introducing polymerizable double bonds into benzophenone molecules; and then adding an alkaline substance to react with carboxylic acid of a product self so as to improve the water solubility, thereby preparing the polymerizable water-soluble photoinitiator. The preparation method is simple to operate and high in product yield, and the obtained photoinitiator is migration-free, good in water solubility and high in initiation efficiency.

The invention relates to a degradable polyethylene modified material and a preparation method thereof. The degradable polyethylene modified material is mainly applied to the production of a disposable degradable plastic bag and is mainly prepared from high-density polyethylene, calcium carbonate, konjac glucomannan, corn starch and a foaming agent. Due to the water retentivity of the konjac glucomannan, the disposable degradable plastic bag prepared from the degradable polyethylene modified material can be maintained in a relative drying state, so that the deterioration and the smelliness of food wastes contained in the disposable degradable plastic bag are difficult to occur. Meanwhile, the disposable degradable plastic bag has stronger toughness due to the addition of the konjac glucomannan, so that the disposable degradable plastic bag is difficult to break. The disposable degradable plastic bag is easy to degrade by taking the konjac glucomannan as a raw material, so that the environment pollution is avoided. The plastic bag commonly used in the existing market is prepared from a single plastic polymer, so that character writing or printing on the plastic bag cannot be carried out. The disposable degradable plastic bag provided by the invention is molded in a blowing manner by using a foaming technique, so that the character writing or the pattern printing on the disposable degradable plastic bag can be carried out.

The invention provides an environment-friendly fireproof material for electrical equipment and a preparation method of the environment-friendly fireproof material, and belongs to the fields of fireproof materials and preparation technologies thereof. The environment-friendly fireproof material for the electrical equipment is characterized by being prepared from the following raw materials in parts by weight: 50 to 60 parts of modified epoxy resin, 30 to 40 parts of fluorocarbon resin, 60 to 90 parts of a fire retardant, 3 to 10 parts of expanded graphite, 3 to 10 parts of alumina silicate fiber and 2 to 8 parts of molecular sieves. The fireproof material provided by the invention is applied to fire protection of the electrical equipment, and is high in crack resistance, water resistance and weather resistance and good in expansion character; meanwhile, the heat release rate of a base material in a burning condition can be obviously reduced, and the quality loss is reduced; moreover, the fireproof material is small in smoke production quantity and good in environmental protection effect.

The invention discloses a proppant and a preparation method thereof, and belongs to the technical field of oil and gas exploitation. The proppant comprises an aggregate and at least two layers of resin coated films coated on the aggregate, wherein the weight ratio of the aggregate to the resin coated film is 100:3-100:13; and the aggregate is quartz sand, ceramsite, glass microspheres, sintered bauxite, sintered aluminum oxide, sintered zirconium oxide or a mixture thereof, and the size of the aggregate is 10-200 meshes, preferably 20-70 meshes. By virtue of a multilayer film coating technology, the sphericity of the proppant can be improved, the density of the proppant can be reduced, and the chemical inertness and strength can be improved. The proppant disclosed by the invention can be widely applied to oil and gas field exploitation, is beneficial to improvement of the sand ratio, reduces the usage of fracturing fluid, eases the embedding of the proppant, improves the water resistance of the proppant, improves the fracture conductivity, and prolongs the effective fracturing period.

The invention provides a halogen-free flame-retardant master batch which comprises the following components in percentage by weight: 15-40% of resin, 50-80% of organic phosphinate, 9-30% of an organicsilicon flame retardant and 1-10% of an inorganic silicon synergist, wherein the sum of the components is 100%. The halogen-free flame-retardant master batch has the advantages of favorable flame-retardant effect, no precipitation and no corrosion on equipment.

The invention discloses a preparation method for odorless regenerated rubber. The preparation method is characterized in that tread rubber powder, an environment-friendly activator, a vegetable oil softener and water are added in the chemical desulfuration process; the environment-friendly activator is prepared from the following components in parts by weight: 3-3.5 parts of persulfate and 7-6.5 parts of aliphatic acid; the amount of the environment-friendly activator is 0.18%-0.29% of the mass of the tread rubber powder; the vegetable oil softener is prepared from cottonseed oil, colophony, pine tar oil, rap oil, drainage oil and olive oil; the amount of the cottonseed oil, the colophony, the pine tar oil, the rap oil, the drainage oil and the olive oil is 3.6%-4.6%, 0.6%-1%, 1.3%-1.9%, 1%-1.5%, 0.8%-1.4% and 0.7%-1.3% of the mass of the tread rubber powder respectively; the added quantity of water is 17%-20% of the mass of the tread rubber powder. According to the invention, products obtained through the preparation method are odorless without containing benzene compounds, are high in tensile strength, great in elongation and moderate in mooney point, and can reach the national-level standard of regenerated rubber; the products such as shoe soles produced from rubber prepared through the preparation method have no color migration.

The invention relates to the medical clinic transfusion field, more particularly, relating to the nuclear track microporous membrane used on a precision medical solution filter and the preparation method. The substrate membrane of the nuclear track microporous membrane used on the precision medical solution filter selects the polycarbonate as the material, and the nuclear track microporous membrane is obtained by high energy charged particle radiation and then sensitized and etching treatment to the substrate membrane, the apertures of the nuclear track microporous membrane are between zero point two micron and ten microns, the density of the nucleopores is that the membrane has five multiply one hundred and five to seven multiply one hundred and five pores per square centimeter. The preparation method of the nuclear track microporous membrane of the invention includes steps of radiation, sensitized treatment, etching and rinsing. The arrangement and application of the precision filter made by the nuclear track microporous membrane of the invention on the terminal of the infusion set of the disposable precision filtering infusion set can effectively filter the insoluble particles in the medical solution, and the filtration rate is more than or equal to ninety five percent, and hold the last pass of the medical solution form entering the human body, thus truly blocking the invasion of the insoluble particles to patients.

The invention discloses a flame-retardant rubber cable material made from a phosphorus-nitrogen expansion type flame retardant without halogen. The rubber cable material comprises the following raw materials in parts by weight: 25-60 parts of natural rubber, 40-75 parts of butadiene-styrene rubber, 70-120 parts of IFR, 5-10 parts of white carbon black, 1-2 parts of ziram, 1-5 parts of vulcanizing agent, 6-8 parts of zinc oxide, 1-3 parts of stearic acids and 1-2 parts of antioxidants. The rubber cable material disclosed by invention has the beneficial effects that the cable material is easy to process, the extruded process is good; the compatibility of the basal body of the obtained flame-retardant rubber cable material made from the phosphorus-nitrogen expansion type flame retardant without halogen and compounding agents such as flame retardant is good, and no compounding agent transport exists; the products have excellent flame retardant property, good mechanical property and good low-temperature flexibility.

The invention discloses a phosphorus-nitrogen halogen-free flame retardant composition capable of improving thermal stability by utilizing inorganic phosphite. The phosphorus-nitrogen halogen-free flame retardant composition is composed of the following raw materials by weight: 40 to 90 wt% of aluminum diethylphosphinate, 20 to 50 wt% of melamine polyphosphate, 0.1 to 10 wt% of a zinc-containing compound and 0.1 to 8 wt% of the inorganic phosphite. The flame retardant system provided by the invention has the characteristics of high flame retardancy, high thermal stability, no migration, no corrosion to equipment, etc. The flame retardant provided by the invention can be applied to glass fiber reinforced thermoplastic engineering plastics; and the halogen-free flame-retardant glass fiber reinforced thermoplastic engineering plastics containing the flame retardant provided by the invention can be used for preparation of parts or products in the fields of electronics and electrical appliances.

The invention discloses a high heat resistance low density high performance auto polypropylene composite and a preparation method thereof. The polypropylene composite comprises the following components in percentage by weight: 50 to 84.5 percent of PP, 5 to 20 percent of flexibilizer, 5 to 15 percent of crystal whisker, 5 to 15 percent of talcpowder, and 0.5 to 2 percent of coupling agent. The preparation method comprises the following steps of: pre-mixing the components of PP and crystal whisker in a high speed mixer; transporting the mixed raw material into a twin screw extruder; and feeding material at the crystal whisker side into the twin screw extruder and performing fusion, extrusion and granulation to obtain the product. The product is characterized in high heat resistance, low density and high performance, and does not produce environmental pollution during manufacturing and use, thereby reducing the pressure on sewage treatment, and reducing energy consumption. Moreover, the composite neither produces the migration of toxic substance nor contains heavy metals. And the product completely meets the ROSH standard.

The invention discloses waterborne polyurethane emulsion for a composite laser coating. The waterborne polyurethane emulsion is prepared by the following steps: performing vacuum dehydration on macromolecular polyhydric alcohol at the temperature of 120-130 DEG C for 1-1.5 hours, reducing the temperature to be 50-60 DEG C, adding diisocyanate and epoxy resin, raising the temperature to be 75-85 DEG C, and reacting for 2.5-3 hours; adding a hydrophilic chain extender and reacting for 1-2 hours; adding an alcohol chain extender and reacting for 2-3 hours, and adding acetone to reduce the viscosity during the period; adding a neutralizer, and carrying out a neutralization reaction at the temperature of 40-50 DEG C for 0.5-1 hour to obtain a neutralization product; adding the neutralization product into water in which an amine chain extender is dissolved, carrying out shearing emulsification at 30-40 DEG C for 0.5-2 hours while controlling the stirring speed to be 2000-4000rpm to obtain primary emulsion, and evaporating to remove acetone under reduced pressure to obtain the emulsion. The emulsion is a self-emulsified system and does not contain small molecular emulsifier, and an emulsifier migration phenomenon is avoided; the waterborne polyurethane emulsion is high in adhesive force with a base material, and interlayer separation is avoided; moreover, the waterborne polyurethane emulsion has high solvent resistance and paint film printability.

The invention discloses a water-based color removing agent and a preparation and use method and application thereof. The water-based color removing agent is prepared from, by mass, 30%-40% of acrylate emulsion, 3%-5% of inorganic thickening agents, 10%-15% of first solvents, 5%-10% of second solvents, 15%-20% of propylene glycol, 0.1%-0.15% of corrosion prevention bactericide, 0.3%-0.5% of wetting agents, 1%-20% of color concentrate and 0%-25% of deionized water or pure water. The water-based color removing agent has the characteristics that product colors are bright and even, and the water-based color removing agent is not prone to layer or coagulate and the like, has water characteristics and has the advantages of being high in transparency, good in permeability, high in retouching performance, excellent in erasing performance, slow in drying and the like, and the water-based color removing agent is not prone to being corroded or breeding bacteria. The water-based color removing agent is used for wooden products, the grain of the wooden products is clear and high in stereoscopic sense, and the good decoration effect on the wood products is achieved.