Phenyl isocyanate Accidental Release Measures and Handling and Storage

Phenyl isocyanate in the ventilation area of leak or spill, Remove all sources of ignition. Wear appropriate personal protective equipment as specified in Section 8. Isolate hazard area. Keep unnecessary and unprotected personnel from entering. Contain and recover liquid when possible. Use non-sparking tools and equipment. Collect liquid in an appropriate container or absorb with an inert material (eg, vermiculite, dry sand, earth), and place in a chemical waste container. Do not use combustible materials, such as saw dust. Do not flush to sewer ! If a leak or spill has not ignited, use water spray to disperse the vapors, to protect personnel attempting to stop leak, and to fulsh spills away from exposures.Protect against physical damage.Phenyl isocyanate must Store in a cool, dry well- ventilated location, away from any area where the fire hazard may be acute. Outside or detached storage is preferred.Phenyl isocyanate also must Separate from incompatibles. Containers should be bonded and grounded for transfers to avoid static sparks. Storage and use areas should be No Smoking areas. Use non-sparking type tools and equipment, including explosion proof ventilation. Containers of this material may be hazardous when empty since they retain product residues (vapors, liquid); observe all warnings and precautions listed for the product. Do Not attempt to clean empty containers since residue is difficult to remove. Do notpressurize, cut, weld, braze, solder, drill, grind or expose such containers to heat, sparks, flame, static electricity or other sources of ignition: they may explode and cause injury or death.
Read more：http://www.chemical-chem.com/Phosgenation-chemicals/Phenyl-isocyanate/

Cycloheptanone 's Uses and reactions

Cycloheptanone has no direct applications, but is a precursor to other compounds. Bencyclane, a spasmolytic agent and vasodilator is produced from it, for example. Pimelic acid is produced by the oxidative cleavage of cycloheptanone. Dicarboxylic acids such as pimelic acid are useful for the preparation of fragrances and certain polymers.
Several microorganisms, including Mucor plumbeus, Mucor racemosus, and Penicillium chrysogenum, have been found to reduce cycloheptanone to cycloheptanol. These microorganisms have been investigated for use in certain stereospecific enzymatic reactions.Read more：http://www.chemical-chem.com/Fine-Chemical-Products/Cycloheptanone/

Performance of Colloidal Silica

Colloidal Silica products are basic structural units ofColloidal Silica  chain consisting of the side chain of Colloidal Silica atoms through a variety of organic groups with other connected. Therefore, the structure of silicone products contain both "organic groups", but also contain "inorganic structure", this particular set of composition and molecular structure of organic matter it's features and functionality in an inorganic. Compared with other polymer materials, silicone products, silicone
The most outstanding performance are: 1. Temperature characteristics of silicone products based on silicon - oxygen (Si-O) bond as the main chain structure, C-C bond energy of 82.6 kcal / mole, Si-O bond in silicone for 121 kcal / mole, so the  Colloidal Silicaproducts high thermal stability, high temperature (or radiation) molecular bond is not broken, do not break down. Silicone not only temperature, but also low temperature, in a wide temperature range. Both physical and mechanical properties or chemical properties, with the temperature changes are small. 2. Weathering products of Colloidal Silica main chain-Si-O-, unparalleled key exists, it can not easily be decomposed by UV light and ozone.Colloidal Silica  polymer material better than other thermal stability and resistance to radiation and weathering capabilities. Silicone in the life of the natural environment of up to several decades.Read more：http://www.chemical-chem.com/Papermaking-chemicals/Colloidal-Silica/

Classification of inorganic Colloidal Silica

Colloidal Silica according to the size of its aperture is divided into: a large pore silica gel, wide pore Colloidal Silica ,B-type silica gel, porous Colloidal Silica. Because the different pore structure, so they have their own characteristics of adsorption. Coarse-pored silica gel in the case of high relative humidity with high adsorption capacity, pore  Colloidal Silicain the case of low relative humidity adsorption capacity than coarse-pored Colloidal Silica, Colloidal Silica as the B-type pore structure between the coarse and fine hole between the amount of adsorption between the thick, between the pore. Inorganic silica gel according to their uses, but also can be divided into beer silica gel, silicone PSA, medical silicone, ,Colloidal Silicadesiccant, silica gel opening agent, toothpaste with silica gel. Pore  Colloidal Silicafor drying, moisture-proof, rust-proof. Prevent the equipment, instruments, weapons, ammunition, electrical equipment, pharmaceuticals, food, textiles and other types of packaging materials exposed to moisture, can also be used as catalyst carrier and refined organic compounds dehydration. Because of its high packing density and low humidity, moisture absorption obvious characteristics that can be used as air-purifying agent to control the air temperature. In the sea on the way there are a wide range of applications, since the goods in transit often large and moisture deterioration due to temperature, the product can be an effective desiccant moisture, so the quality of goods is guaranteed. Pore Colloidal Silica is also commonly used between two parallel plates sealed windows dehumidification, two layers of glass can maintain brightly lit degree.
Also known as C-type coarse-pored  Colloidal Silica is a gel, is a highly active adsorption material, is a coarse-pored silica gel
Amorphous material, its chemical formula is mSiO2 · nH2O. Insoluble in water and any solvent, non-toxic, odorless, chemically stable, in addition to alkali, hydrofluoric acid does not react with any substance. Coarse-pored  Colloidal Silicachemical components and physical structure, determines that it has many other features too difficult to replace similar materials: adsorption properties, thermal stability, chemical stability, high mechanical strength. The appearance of coarse-pored  Colloidal Silicais white, there are massive, spherical and spherical micro-three categories of products. Coarse pore silica gel is mainly used for gas purification, desiccant and acid agents in addition to insulating oil; coarse pore Colloidal Silica is mainly used for bulk catalyst, desiccant, gas and liquid cleaning agent.Read more：http://www.chemical-chem.com/Papermaking-chemicals/Colloidal-Silica/

Phenyl chloroformate Fire Hazard

Phenyl chloroformate is Colourless or slightly yellowish liquid. Emits fumes containing Phenyl chloroformate in moist air. Decomposes in water to formPhenyl chloroformate . Phenyl chloroformate is Combustible material: may burn but does not ignite readily. Substance will react with water (some violently) releasing flammable, toxic or corrosive gases and runoff. When heated, vapors may form explosive mixtures with air: indoors, outdoors and sewers explosion hazards. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapors may travel to source of ignition and flash back. Contact with metals may evolve flammable hydrogen

Read more：http://www.chemical-chem.com/Phosgenation-chemicals/Phenyl-chloroformate/

Benzyl chloroformate accidental release measure and storage

Benzyl chloroformate release, Use proper personal protective equipment
Benzyl chloroformate Spills / Leaks: using inert material, such as, vermiculite, sand or earth to absorb spill. Then place in suitable container. Clean up spills immediately,observing precautions in the Protective Equipment section. Scoop up with a nonsparking tool, then place into a suitable container for disposal.
Wash thoroughly after handling. Wash hands before eating. Remove contaminated clothing and wash before reuse. Use only in a well-ventilated area. Do not get in eyes, on skin, or on clothing.Avoid contact with heat, sparks and flame. Do not ingest or inhale.Benzyl chloroformate Storage: Keep away from heat, sparks, and flame. Keep away from sources ofignition. Store in a cool, dry place. Keep refrigerated

Read more：http://www.chemical-chem.com/Phosgenation-chemicals/Benzyl-chloroformate/

isopropyl chlorocarbonate method of packaging and transport

isopropyl chlorocarbonate should open with a small steel drum; threaded glass Lid pressure bottles, plastic bottles or metal (cans) outside the ordinary wooden box; threaded bottles, plastic bottles or tinplate barrel (LP), full floor grille boxes, fibreboard or plywood box.isopropyl chlorocarbonate transport transport vehicles should be equipped with appropriate variety and quantity of fire-fighting equipment and emergency equipment leakage. The best summer morning and evening transportation. Transportation used in tank (tank) cars should be grounded chain, tank can be installed to reduce the partition hole static electricity shocks. Strictly prohibited and oxidants, bases, food chemicals, etc. mixed mixed operation. Transit should be anti-exposure, rain, high temperature. Stopovers should be away from fire, heat, high temperature zone. isopropyl chlorocarbonate shipment of the goods vehicle exhaust pipe must be equipped with fire retardant devices, prohibit the use of easy to produce sparks of mechanical handling equipment and tools. According to the provisions of road transport routes, not in residential areas and densely populated areas. Railway transportation to prohibit the slide release. Forbidden to use wooden, cement and bulk transport.

Read more：http://www.chemical-chem.com/Phosgenation-chemicals/Isopropyl-chlorocarbonate/

isopropyl chlorocarbonate emergency and spill contingency

isopropyl chlorocarbonate leak, rapid withdrawal from air leakage personnel to a safe area, and immediately quarantine 150m, and strictly limit access. Cut off the fire source. Recommended emergency personnel wearing self-Pressurized respirators to wear protective clothing. Do not spill direct contact. Possible cut off the source of leakage. Prevent from entering sewers, flood discharge trench so restrictive space. isopropyl chlorocarbonate A small leak: sand or other non-combustible material to absorb. You can also use non-flammable dispersant made of latex, wash, lotion diluted Add Water Wastewater System. isopropyl chlorocarbonate Large leak: to build a causeway or trenching asylum. Ex pump used to transfer tankers or exclusive collector, recycling or shipped to the waste disposal sites.isopropyl chlorocarbonate nature of waste disposal methods of waste: Disposal in state and local regulations. Proposed incineration disposal. And fuel mix, and then burned. Incinerators emit hydrogen halide through the acid scrubber to remove.
Read more：http://www.chemical-chem.com/Phosgenation-chemicals/Isopropyl-chlorocarbonate/

n-butyl chloroformate Emergency treatment and disposal methods

n-butyl chloroformate spill emergency, rapid withdrawal from air leakage personnel to a safe area, and immediately isolate small leakage isolation 150m, a large leakage isolation 300m, strict restrictions on access. Cut off the fire source. Recommended emergency personnel wearing self-Pressurized respirators to wear protective clothing. Do not cut off the source of leakage directly as to prevent access to sewers, flood discharge trench so restrictive space. n-butyl chloroformate A small leak: sand or other noncombustible material attached to or absorbed lessons. n-butyl chloroformate Large leak: to build a causeway or trenching asylum. Covered with foam to reduce vapors disasters. With the transfer pump to tankers or exclusive collector, recycling or shipped to the waste disposal sites.

Read more：http://www.chemical-chem.com/Phosgenation-chemicals/n-Butyl-chloroformate/

Colloidal Silicaproduction process characteristics and industrial applications

Acid concentration is moderate. Acid concentration is too high, a larger  Colloidal Silica particles , gathered at a coarse pore Colloidal Silica, Ifn I gel solution in a concentration large particles that gel network structure tightness increases, together Shiyou vulnerable to pore, a person has a tendency to cancel each other out. Furthermore, high concentrations of acid, the gel solution viscosity increases, to a certain degree of difficulty of granulation, in addition, the size of the acid concentration is also subject to the gel particle size, structure and production design capacity constraints . Acid-base temperature. Acid-base reaction too fast. Ifu wood body acid-base reaction is exothermic reaction time together and when the exothermic particles r, therefore, making either a particle r has been great. "Granulation speed slowed down. is bound to exceed the technical requirements range of granulation negative; acid-base temperature is too low. a grain r decreases. easy to form pores, but the mountain "a few Colloidal Silica solution temperature is too low, the viscosity increased also to manipulate the negative particles. Therefore, the temperature should be moderate pH. Gel time gel granulation granulation process is another critical process parameters. Mixed acid-base reaction is from the beginning to the size of the gel formation time experienced so far, including gel time and granulation time. Gel granulation time is short. You can make the Colloidal Silica solution reaction is not adequate or inadequate uniformity, making an uneven distribution of the concentration of particles r the formation of local accumulation of gel or partially close. This leads to the granulation process in the bubble glue pieces of rubber or plastic ball strong enough and so on. This was also the internal structure of particles caused by rubber ball disorder. Large range of pore size distribution is a major cause. Therefore, in the production practice. On "a few air granulation in the process allows the range. Large rubber particles. Time to as long as possible. Small plastic particles. Shorter time may be appropriate. Several Colloidal Silica in the reactor tank special fine grain silicone ball. Will have a longer time. _ To increase mixing head.
Read more：http://www.chemical-chem.com/Papermaking-chemicals/Colloidal-Silica/

Polyacrylamide is a Soil Conditioner and its Stability

The primary functions of Polyacrylamide Soil Conditioners are to increase soil tilth, aeration, and porosity and reduce compaction, dustiness and water run-off. Secondary functions are to increase plant vigor, color, appearance, rooting depth and emergence of seeds while decreasing water requirements , diseases, erosion and maintenance expenses.
In dilute aqueous solution, such as is commonly used for Enhanced Oil Recovery applications, polyacrylamide polymers are susceptible to chemical, thermal, and mechanical degradation. Chemical degradation occurs when the labile amine moiety hydrolyzes at elevated temperature or pH, resulting in the evolution of ammonia and a remaining carboxyl group. Thus, the degree of anionicity of the molecule increases. Thermal degradation of the vinyl backbone can occur through several possible radical mechanisms, including the autooxidation of small amounts of iron and reactions between oxygen and residual impurities from polymerization at elevated temperature. Mechanical degradation can also be an issue at the high shear rates experienced in the near-wellbore region. However, cross-linked variants of polyacrylamide have shown greater resistance to all of these methods of degradation, and have proved much more stable.
Read more ：http://www.chemical-chem.com/Papermaking-chemicals/Polyscrylamide/

Colloidal Silica can reproduce

After Colloidal Silica  water adsorption, thermal desorption method by removing the moisture, heat in different ways, such as electric stoves, flue waste heat such as heating and hot air drying.
Desorption temperature control in heating 120 - 180 ℃ is appropriate, for the blue Colloidal Silica indicator, Colloidal Silica ， DL type blue Colloidal Silica  is controlled at 100 - 120 ℃ appropriate. Variety of industrial Colloidal Silica  regeneration, the maximum temperature should not exceed the following limits: coarse pore Colloidal Silica  shall not exceed 600 ℃; pore Colloidal Silica  shall not exceed 200 ℃; blue gel indicator agent (or silica gel) shall not exceed 120 ℃; Alumina plastic shall not exceed 350 ℃. Regenerated Colloidal Silica  , the water is generally below 2% can control back into use.

Colloidal Silica adsorption machine impurities regeneration methods: ⒈ roasting method for coarse-pored Colloidal Silica, can be placed inside the roaster is gradually warming up to 500 - 600 ℃, after about 6-8 hours to Colloidal Silica  Particles can be white or brown. Of the pore Colloidal Silica  , calcination temperature can not exceed 200 ℃. ⒉ rinsing method, the Colloidal Silica in saturated water vapor adsorption reached saturation, heat water for rinsing, and combined with detergent to remove oil or other organic impurities, and then by water washing after drying dehydration.

⒊ solvent washing method, according to the Colloidal Silica adsorption of organic species, choose the appropriate solvent adsorbed on the silica dissolution in organic matter, and then removing the solvent by heating the Colloidal Silica.
Read more：http://www.chemical-chem.com/Papermaking-chemicals/Colloidal-Silica/

surface sizing agent Use methods U

surface sizing agent PH adjustment, starch gelatinization glue with aluminium after completely solution as PH in 3.0. (general tons with aluminium liquid 6-8 kg), the gluing additives used to join .Responding to join dosage: according to the pulp and paper tons of different dosage 0.5-250 kg. Responding to join method: A, intermittent, join the starch gelatinization diluted liquid temperature below 60 degrees Celsius, measuring goodsurface sizing agent , and start to stir, agitate backup, B, continuous to join, according to the paper machine speed calculation according to the production output and consumption of starch calculation tons of paper glue and additives on the flow of starch adhesive before the machine with metering pump for joining. Continuous adding requirements of starch glue tank level automatic control. Responding to starch pasting must fully, uniform, starch liquid viscosity indexes of concentration, stable, Responding to use, add vitriolic starch. Responding to control starch liquid temperature drop to 60 degrees Celsius, just can join our product, continuous join temperature can relax appropriately,

Read more :http://www.chemical-chem.com/Papermaking-chemicals/Surface-Sizing-Agent/

Phenyl isocyanate Handling and Storage

Protect against physical damage.Phenyl isocyanate Store in a cool, dry well-ventilated location, away from any area where the fire Phenyl isocyanate hazard may be acute. Outside or detached storage is preferred. Separate from incompatibles. Containers should bebonded and grounded for transfers to avoid static sparks. Storage and use areas should be No Smoking areas. Use non-sparking type tools and equipment, including explosion proof ventilation. Containers of this material may be hazardous when empty since they retain product residues (vapors , liquid); observe all warnings and precautions listed for the product. Do Not attempt to clean empty containers since residue is difficult to remove. Do not pressurize, cut, weld, braze, solder, drill, grind or expose such containers to heat, sparks, flame, static electricityor other sources of ignition: they may explode and cause injury or death.
Read more :http://www.chemical-chem.com/Phosgenation-chemicals/Phenyl-isocyanate/

Methacrylic anhydride’s First Aid

Methacrylic anhydride’s Note: No information on specific clinical effects of exposure was available.Signs and Symptoms of Methacrylic Anhydride Exposure: Signs and symptoms of acute exposure to methacrylic anhydride may include headache, dizziness, weakness, and nausea. May cause irritation of the eyes, skin, and respiratory tract. Esophageal or gastrointestinal tract irritation or burns may also be noted.Emergency Life-Support Procedures: Acute exposure to methacrylic anhydride may require decontamination and life support for the victims. Emergency personnel should wear protective clothing appropriate to the type and degree of contamination. Air-purifying or supplied-air respiratory equipment should also be worn, as necessary. Rescue vehicles should carry supplies such as plastic sheeting and disposable plastic bags to assist in preventing spread of contamination.

Read more :http://www.chemical-chem.com/Fine-Chemical-Products/Methacrylic-anhydride/

Dry Strength Agent Usage

Dilute (usually in 15-30 times) with clean water. (Please do not use the water with a lot of impurity such as white water etc.) Please add into the pulp as evenly dispersed as possible.

The add position must be the place where the product and the pulp can mix evenly. Generally, Dry Strength Agent is added in stork porportioner or proportioning box.  

The container and piping which we recommend are FRP, PVC, PE, Please not use the container and piping made by iron. Iron container will cause corrosion and sticky, do not use Dry Strength Agent.

 Do not be used with other chemicals.

The storage time is 3 months, the quality of expired products may be declined. Please note that.

 Being acidic, please flush with running water in case of the skin contact Flush and get medical attention in case of eye contact. Spit it out and get medical attention in case of mis-drinking.

Read more :http://www.chemical-chem.com/Papermaking-chemicals/Dry-Strength-Agent/

Surface Sizing Agent ‘sUse methods

Surface Sizing Agent ‘sUse methods. First the starch pasting, oxidation process.Responding to starch pasting process:Will starch pasting tank into half pot (70%) water, and then the blender filled tank slowly, slowly starch through steam heating to 60 degrees Celsius, starch gelatinization, begin to slightly stick-slip emulsion. Stop and join after 15 minutes, stirring amino acid. 50 ° c, heat temperature for 10 minutes, then slowly open the oxidation reaction heat, steam valve continued for pasting temperature, reaction process about 85-90 degrees to transparent plastic starch emulsion liquid. Close valve, continue to stir, steam heat preservation 20 minutes. Add water dilute, temperature in 65-70 ° c.Adopts feeding process ratio:Starch: sulfuric acid amine = 10:4.Responding to starch pasting concentration of 10-15%, 8-12. Use concentration

Read more :http://www.chemical-chem.com/Papermaking-chemicals/Surface-Sizing-Agent/

AKD wax for sale

This product is alkyl ketene dimmer after taking acylation and dehydrochlorination from higher fatty acid. This product can be considered as crude materials of AKD wax and neutral sizing agent and be used to produce emulsified liquid of paper pulp neutral sizing agent.This product is packed with plastic woven inner liner plastic bags. Net weight per bag is 25kg or packing according to customers’ need. Please avoiding sunshine, rain and knocking during transporting. Be careful when moving. Storing in dry and dark conditions, and the temperature is below 35^oC . Pay more attention to fire. Guarantee period from production date is eight months

Read more :http://www.chemical-chem.com/Papermaking-chemicals/AKD-Wax/

Colloidal Silica gel is an organic silicone compounds are those containing a Si-C bond, and at least one organic base is directly connected with the silicon atoms of compounds, often used on those by oxygen, sulfur, nitrogen, etc. so that the organic base connected with the silicon atoms of compounds are also used as organic silicon compounds. Among them, the silicon-oxygen bond (-Si-O-Si-) consisting of polysiloxane as the backbone, is the largest number of organic silicon compounds, research the deepest, the most widely used class of about 90% of the total volume of .Colloidal Silica  Is a highly active adsorption material is amorphous material, its chemical formula is mSiO2 · nH2O. Colloidal Silica is insoluble in water and any solvent, non-toxic, odorless, chemically stable, in addition to alkali, hydrofluoric acid does not react with any substance.
Read more :http://www.chemical-chem.com/Papermaking-chemicals/Colloidal-Silica/

Methacrylic Anhydride’s Protection and Respirators

         

 Suitable protective clothing & self-contained resp protective apparatus should be available for use of those who may have to rescue persons overcome by fumes. Acrylic acid & derivatives. Use NIOSH/MSHA approved respirator appropriate for exposure of concern. Methacrylic Anhydride Small spills/leaks  (Non-Specific -- Methacrylic Acid) Do not touch spilled material; stop leak if you can do so without risk. For small spills, absorb with sand or other noncombustible absorbent material and place into containers for later disposal. For large spills, dike far ahead of spill for later disposal. Stability，No data. Reacts exothermically with water Incompatible with acids, strong oxidizing agents, alcohols, amines, and bases.

Read more :http://www.chemical-chem.com/Fine-Chemical-Products/Methacrylic-anhydride/

Dry Strength Agent for sale

Paper strength is affected by many factors, first of all into the paper fibers depends on the combination of force and strength of fiber itself, and the arrangement of fibers in paper and distribution. The most important is the inter-fiber bonding, fiber bonding generally have four: chemical bonds, hydrogen bonds, van der Waals force and woven fiber surface. Which hydrogen bonding is the bonding strength of paper generated by the main way, a considerable number of cellulose hydroxyl molecules by the formation of numerous micro-fiber hydrogen bonding between them is a great force, which is the main causes of dry strength. Dry strength agent is characterized by its molecular structure point of view are mostly multi-hydroxyl containing polymer, which is formed with the hydrogen bonding between cellulose molecules based, dry-strength agent molecules to form hydrogen bonds with the fiber surface groups hydroxyl form hydrogen bonds. Such as starch, glucose-free cellulose fiber surface hydroxyl groups involved in the formation of molecular hydrogen bond, so the starch to increase the internal fiber bonding, between the two beams of natural fiber surface increased with the number of hydrogen bonds. Dry strength agent while on the sheet forming process has a certain role in improving the dry strength agent at this time onwards the role of effective dispersant, the slurry or dry strength agent in the fiber distribution is more uniform, provide more fiber and between fibers and high molecules, thereby improving the dry strength.

Read more :http://www.chemical-chem.com/Papermaking-chemicals/Dry-Strength-Agent/

Cycloheptanone preparation and packing

Cycloheptanone is colorless oily liquid. Boiling point 179-180 ℃, relative density 0.9508 (20 ℃), refractive index of 1.4608, flash point 55 ℃. Soluble in alcohol and ether, almost insoluble in water, mint odor.
Cyclohexanone and by the addition of nitromethane, reduction, diazotization, ring expansion derived. Process as follows: methanol, nitromethane, cyclohexanone 11:50 in mixing, dropping lye in 5-10 ℃, -4 ℃ cold response to 1h, filter out sediment, dissolved in water, acidified with acetic acid to pH = 4-5, and then heated to dissolve, put it aside, get a reservoir was methyl cyclohexanol nitrate crude oil; then crude oil with iron reduction, amine a cyclohexanol was still liquid; sodium nitrite solution, in 0-8 ℃ diazotization, heated to 25 ℃ stirring 1.5h, and then heated to 85 ℃, and then steam distillation, distillate put it aside, get a reservoir vacuum distillation, collecting 60 ℃ (1.87kPa) fractions , was finished Cycloheptanone
Cycloheptanone use ampoules, ampoule outside the ordinary wooden box; threaded glass Lid pressure bottles, plastic bottles or metal (cans) outside the ordinary wooden box; threaded bottles, plastic bottles or tin thin steel barrel (LP), full floor grille boxes, fibreboard or plywood box
Read more :http://www.chemical-materials.net/plus/search/index.asp

Colloidal silica preparation method

Inorganic polymer coating of silica sol preparation process no special difference between the other coating, but should be slowly added Colloidal silica, or paint will change in nature. You can take off work the following preparation: the film-forming additives (often made with the use of zinc oxide, silicic acid ester, butyl acetate, methyl-sodium) added to the reaction kettle, add water, mixing quantitative and turn adding surfactant (benzene sulfonate), thickeners (hydroxyethyl cellulose, CMC, etc.), dispersant (sodium side door), defoamer (TBP) and other additives; and then slowly adding Colloidal silica, pigment, color paste. Sanding machine or a colloid mill with a small study, need to join the middle points can be coarse aggregates. PH value of the coating needs of 8.510 between. Colloidal silica  inorganic polymer coating formulation: greater shrinkage during sol film, coating easy to crack, to overcome this drawback, in addition to adding the inorganic fibrous filler coating, while also adding water-soluble emulsion as a supplement to membrane material, so that organic matter fill in "-Si-O-Si-", network structure to reduce the film shrinkage and expansion and contraction caused by temperature changes. Into a coating that has excellent weather resistance of inorganic, organic coatings, as they have excellent decoration, stability and construction of the organic compound coating. This test can usually filter: in the inorganic material film accounted for 50% to 90%, 10% and 50% organic matter. When added in with the polyvinyl acetate emulsion; to add external benzene - acrylic emulsion, the first use of rutile titanium dioxide, the volume concentration of 5%, and mixed with a lot of pigment, the total volume concentration of 60% 70% speculation

Read more :http://www.chemical-materials.net/plus/search/index.asp

Polyacrylamide using the methods and precautions

you can through a small test to determine the best model, and the optimal dosage of the product. 2, the product prepared as 0.1% (mean solid content) concentration of aqueous solution of neutral salt to the water not suitable. 3, dissolved in water, it will even be thrown into the mix this product in water, appropriate heating (<60 ℃) can accelerate into a solution. 4, the solid product with polypropylene woven bag lined with plastic bag, 25kg, colloid plastic drum lined with plastic bag, barrel, 50kg or 200kg. 5, the products are hygroscopic, should be sealed and stored in a cool dry place, the temperature is lower than 35 ℃. 6, the solid product to avoid the spread on the ground to prevent moisture absorption after the product to become slippery. 7, the preparation of PAM aqueous solution should be in the enamel, galvanized, aluminum or plastic drums for, not in the preparation and storage of iron within the container 8, dissolved, should pay attention to the product evenly and slowly added with stirring and heating measures dissolver, solid knot should be avoided, the solution prepared in the appropriate temperature, and should avoid prolonged drastic mechanical shear is recommended agitator 60-200 turn / min, otherwise it will lead to polymer degradation, affect the results . 9, PAM aqueous solution should be done now with the existing, when dissolved in liquid for a long time to place, its performance will depend on the circumstances of decreased water quality 10, adding flocculant in the suspension solution, if heated long to stir, it will undermine the already formed floc physicochemical properties of polyacrylamide

Read more :http://www.chemical-materials.net/plus/search/index.asp

Colloidal Silica’sMethod of preparation

Inorganic polymer coating of silica sol preparation process no special difference between the other coating, but should be slowly added silica, or paint will change in nature. You can take off work the following preparation: the film-forming additives (often made with the use of zinc oxide, silicic acid ester, butyl acetate, methyl-sodium) added to the reaction kettle, add water, mixing quantitative and turn adding surfactant (benzene sulfonate), thickeners (hydroxyethyl cellulose, CMC, etc.), dispersant (sodium side door), defoamer (TBP) and other additives; and then slowly adding silica sol, pigment, color paste. Sanding machine or a colloid mill with a small study, need to join the middle points can be coarse aggregates. PH value of the coating needs of 8.510 between. Silica inorganic polymer coating formulation: greater shrinkage during sol film, coating easy to crack, to overcome this drawback, in addition to adding the inorganic fibrous filler coating, while also adding water-soluble emulsion as a supplement to membrane material, so that organic matter fill in "-Si-O-Si-", network structure to reduce the film shrinkage and expansion and contraction caused by temperature changes. Into a coating that has excellent weather resistance of inorganic, organic coatings, as they have excellent decoration, stability and construction of the organic compound coating. This test can usually filter: in the inorganic material film accounted for 50% to 90%, 10% and 50% organic matter. When added in with the polyvinyl acetate emulsion; to add external benzene - acrylic emulsion, the first use of rutile titanium dioxide, the volume concentration of 5%, and mixed with a lot of pigment, the total volume concentration of 60% 70% speculation.

Read more :http://www.chemical-materials.net/plus/search/index.asp