1=SimSun material ball silicone modified foam adhesive has characteristics of high compressive strength, good thermal insulation, good toughness and elasticity, low moisture content, etc. The series of questions in operation has significant advantages and utilization values. This article takes a steam buried pipeline as an example to analyze the use of ball silicon composite insulation materials.
Number 0.0560.061 sector, compressive strength 4.26.53, maximum operating temperature 850 particle size 100300 claws, wall thickness 2,6 is called, China's density 400500 .2 foaming adhesive polyisocyanurate modified. Unmodified polyisocyanurate foams do not have much practical value. Therefore, oxazolidinone epoxy resin modification was introduced between the polyisocyanurate alicyclic rings. When the epoxy resin modified polyisocyanuric acid fat foam is used, the epoxy group in the epoxy resin reacts with the isocyanate group to form an oxazolidinone, which can be used in a step molding process and can also be formed by a prepolymerization process. The main advantage is that the maximum operating temperature is 150 or more, and the 250 1 has only apparently failed.
1.3 Polyols Polyols Polyurethane rigid foams Polyols Polyether polyols and other hydroxyl-containing compounds, with polyether polyols used most. The structure of the polyol has a great influence on the properties of the resulting rigid foam.
Polyether polyols are resistant to hydrolysis and have good compatibility with other additives in the formulation. The properties of the polyether polyol are closely related to the initiator and are also related to the length and arrangement of the oxygen lean hydrocarbon chains in the molecule.
1.4 Foaming Agents Foaming agents have been mainly used in recent years as chlorofluorocarbons 0, hydrochlorofluorocarbons 0 and carbon oxides.
As a preferred foaming agent, it is widely used in polyurethane rigid foam plastics. It has a boiling point of 23.7, is liquid at room temperature, and is easy to operate. The vaporization heat is small, the foaming process is easy to vaporize, and the thermal conductivity is low, so the resulting rigid foam has low thermal conductivity; 3 is non-flammable; 4 the non-toxic 5 has little effect on the dissolution of the polyurethane substrate.
Rigid foam HCFC blowing agent, 0, 10, ozone depletion potential, 0.15,143 can be replaced, as a foaming agent, thermal conductivity and 0 foam similar.
The foaming method of generating carbon oxides by reacting water with isocyanate is also called water foaming. The thermal conductivity of carbon oxide gas is much higher than that of 0, and it is easy to escape through the foamed conjunctiva from inside the cell, so the resulting rigid foam has a high thermal conductivity. To obtain a carbon oxide foamed rigid foam with a good dimensional stability, it is generally necessary to increase the density. The carbon dioxide is zero, and it is nonflammable and safe to use.
1.5 Catalyst The catalyst is a polyurethane rigid foam molding process, the chemical reaction speed is not only affected by the variety of raw materials and temperature, but also by the catalyst. The catalyst not only affects the process parameters but also affects the properties of the resulting rigid foam. Therefore, the catalyst is a very important raw material. For a variety of rigid foam molding methods, it is necessary to select the appropriate catalyst. The commonly used catalysts are divided into two categories, which are tertiary amine compounds, and the others are organotin compounds. Certain carboxylates also have a defined catalytic activity.
1.6 Surfactant formation into nuclei stabilizes. Therefore, the surfactant and the surfactant do not seem to have an effect on the processing performance of the rigid foam feed material, and the foamed plastic material can also be greatly affected. Commonly used surfactants are polyalkylene octane polyoxyalkylene block copolymers. The copolymer is divided into groups containing silicon-oxygen-carbon bonds, which are stored and used during hydrolysis and stabilization.
Contains 1 carbon bond name, not easily hydrolyzed.
2 Ball Silicon Composite Anticorrosion & Insulation Material Performance The Hill Plant Ball Concrete Composite Anticorrosion & Insulation Material is the cementation of organic matter and inorganic matter, forming the same surface and affinity. it.宥 å¿ å®¥ 宥 æ— æœº æ— æœº æ— æœº æ— æœº æ— æœº 从而 从而 从而 从而 从而 从而 从而 从而 从而 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。.
According to the properties of ball silicon, the internal components of anti-corrosion and heat preservation materials are used to clarify the following points: 0 fly ash floating bead is used as the reinforcing matrix of ball silicon anti-corrosion and heat preservation materials. Drift beads particles can provide the strength of the ball antimony composite anti-corrosion insulation material, and the characteristics of 1 floating beads, so that the thermal conductivity of the ball silicon anti-corrosion insulation to reduce the material to reduce.
The methyl oxime siloxane polyoxyalkylene oxime block copolymer not only functions as a nucleating emulsion, but also functions as a hydrophobic agent, and serves as a modifying agent for the bead particles.
Modified epoxy resin as a ball arsenic composite anticorrosive insulation material additives in addition to some of the necessary to help the curing process 1 outside. Some auxiliaries can change the properties of lanthanum silicon composite anticorrosive and heat-insulating materials, such as the thermal stability of machine tin and Titon Island materials. Advantages and disadvantages of 3-ball silicon compound anticorrosive and heat-insulating material 3.1 Advantages of ball silicon composite heat-insulating material 3.1.1 Thermal conductivity coefficient Ball-land composite anticorrosion and heat insulation material member. The lower thermal conductivity is its outstanding feature. The thermal insulation coefficient of inorganic thermal insulation products with lower thermal conductivity widely used in thermal insulation projects is all at 0.053.62. The thermal insulation coefficient can be good for polyurethane foam, and the thermal conductivity of the material can be achieved. 23 from 1. Spherical silicon composite anticorrosion The thermal conductivity of the insulation was measured at the experimental slaughter and was reduced to 0.053 for example 4 at the site Shiding. In order to ensure low thermal conductivity! . 82 As a result, under the premise of using this tree material to ensure that you set the maximum heat loss, you can use ten straight buried temperature tubes and do not consider the temperature of the outer seven surfaces of the insulation. Reduce the cost of the process, or save it before ensuring the closeness to other insulation materials, reduce the heat loss and improve the operating economy.
32 Compressive strength The compressive strength of the high-silicon composite anticorrosive and heat-insulating material is 4.29 1 and the compressive strength of the insulating material is very low. For example, the compressive strength of the hard inorganic insulating material is only 240.63. This conventional insulating material is flashed, especially the poly. Urethane foamed rock wool and glass products are required to make a good outer protective layer. Even so, in the process of transportation or installation, it is often caused by the damage of the protective layer, the performance of the body's heat preservation and anti-corrosion materials, the strength of the material, and the relatively strong strength, which can effectively prevent external force damage under the above conditions. In addition, the operation of the insulation layer in the mountain buried pipeline will inevitably cause relative displacement of the insulation pipe inside or outside the insulation layer or the soil-producing cattle. This displacement is caused by the thermal expansion of the mountain. The high anti-out strength ensures that the layer will not crack or damage during displacement.
33 Low Water Absorption After detection, the ball-silicon composite anti-corrosion insulation has a water absorption coefficient of 4.34, while the inorganic insulation material has a water absorption rate of 1 wood material value.
In the current use of insulation materials, only the high-density foam polyurethane absorbent water low-butyl materials attached to water, but it does not absorb water this feature is particularly suitable for underground high underground Shanghai Xiao. Insulation of pipelines, such as buried pipelines or beaches along the riverbed. Ball arsenic polymerization anti-corrosion insulation material strength and hydrophobicity, to omit or simplify the conventional insulation of the outer protective layer.
3.1.4 high temperature ball silicon composite anticorrosive insulation material can be made in 30 continuous, its performance will change. This working temperature is much higher than the temperature requirement of the 15% of the central city's high-temperature hot water 15.1. This temperature can also be satisfied under the following conditions, the industry transmission medium for steamed bamboo insulation requirements.
3.1.5 Non-flammable ball The main component of the composite anti-corrosion and heat-insulating material is the special material of the enamel. The proportion of the replenishing agent is very small. Produce cattle in wooden materials. At the same time, additional flame retardant was added, so this material + disc burns and parallels. There is good insulation for pipes and equipments for higher parts, especially suitable for toughness of helium 3.1.6. The micro-mirror observation, the particles of the material squeezing the tough parts to get the ball silicon, together with the anti-corrosion and heat preservation materials The toughness of this material is a flaky, unconstrained twist. This feature of the material ensures that the material will not expand when it is forced to expand in the same way as the insulated tube. = The cracks in the insulating layer are damaged due to the difference in linear expansion coefficient. This point also makes the wood material insulative when subjected to an external force, such as a dent hit by a hand hammer, without brittle crushing.
In addition, the ball-silicon composite anti-corrosion thermal insulation material 51-bit, no contact with the gold, surface no corrosion, 3.2 exist asked 3.2.1 performance indicators are unstable, the data is not regularity in the current strength test is now.
It is difficult to ensure that the indica- tive properties of the floating bead granules are analyzed, and that the bead particles cannot be suspended in the liquid phase. In this way, the distribution of float beads in the product will be extremely uneven. Then, the composite material will be affected by the degree and degree of its strength in terms of strength and heat resistance. The purpose has been effectively solved.
3.2.2 Defects of raw materials The ball arsenic compound anticorrosion and heat preservation materials, such as machinery and equipment, are specially used for foaming materials. They cannot withstand high temperatures. In the warm state, the material is pyrolyzed, and the internal pores of the composite material gradually increase, forming a hollow cavity.
4 ball silicon composite anti-corrosion and heat insulation material is used to improve the steam straightness to the steel foodstuff steel fixed steam buried pipe and plastic foodstuff steel fixed steam pipe in Shiding. And the use of the existing questions, the use of ball broken Ji anti-corrosion insulation of the external fixation method can be solved by the child to ask the interface to deal with. Ball silicon composite anti-corrosion and thermal insulation material with good heat shrinkability 1.22.0 and dynamism, for the absorption of thermal insulation material in the training, in the pipe joints Shimato-machi avoid interface location and pipe insulation due to the lack of integrity caused by insulation The material was badly solved by Jiang, which was difficult to construct. Ball silicon composite anti-corrosion protection, material, with, polyurethane, machine foam characteristics, foaming curing at room temperature can be completed in a short time, construction is convenient, into a plastic work Jie Jie, æ²², the most easy to control quality, very good The solution to steel boring steel internal fixation Shi Ding. Difficult people are slow to ask.
Solve the problem of eccentric steel pipe, ball joint anti-corrosion insulation material has a very high strength, after 3001 into rejection operation, the internal compressive strength of 4 to 351. , Foreign records up to 1.93 or more, claws in the steel food steel fixation and foraging steel external fixation, effectively solve the Dingzuo steel tube eccentric question.
Solve the water and carbonization. Ball silicon anticorrosive insulation materials compressive strength products, low water absorption, close porosity and polyurethane similar, high temperature adhesives on the claws do not from carbonization, so that there is micro-carbonization of the internal discipline, the mountain factory aggregate ball Silicon has formed an indefinite dot-like structure plus the circular arch wall formed by the parent cell and the dome-shaped structure inside the clamshell, to a large extent. Avoid ingress of water and heat preservation 6 Carbonization Ask the development prospect of 5 ball silicon compound anticorrosion and heat preservation materials 5.1 The development prospect of ball baby compound anticorrosion and heat insulation material can be popularized and applied in hot water pipe network. At present, the development of the central heating of Tieling curtain is in its peak period. The heat network and heat source lag behind the development of the load, and the construction fund structure will change. The central heating development and construction funds will become the heat source cooperation, the heat network will be built together, and the current heat price With the investment rate of construction funds changing the current status, there will be an indefinite heat price linked to the investment and income, and the heat price will be prorated, thereby expanding the expansion of the supervisory network and heat source into new competition points and improving the existing heat network. The heat transfer capacity will also become the heat company's important lesson.
Improve the heating capacity of the current right-hand pipe network. There are two ways to increase the flow and solve the heat transfer capacity, but increase the operating cost of the pipe and the electric trust, and the electricity consumption increases, which is not economical. Increasing the water supply temperature can solve the problem, but even with the modification The foam material can only increase the temperature to between 130,1351. The use of a ball-silicon foam compounded anticorrosive and heat-insulating material to bring the temperature of the water supply to the island to 50801 can double the existing heat capacity of the Philosophy network even. The tree material will be developed and improved, and will become the main body of my anti-corrosion and insulation material, thus replacing the market structure of polyamines.
5.2 Environmental Benefits of Ball Silicon Composite Anticorrosion and Insulation Materials The use of mineral fillers in ball-silicon composite anti-corrosion and thermal insulation materials for the use of fly ash floating beads belongs to the island's new technology industry of fly ash, and has considerable potential before development.
Before 1st, all; the coal for power generation for the sector consumed 70% of the expensive fly ash for 7 years to reach 700 million in the next 20 years. Thermal power generation is still an important user of coal, and Qiu will continue to expand. According to statistics, in 987, there were 48.09 million ash removal workers in coal-fired power plants with a capacity of 50 or above in China, and the utilization rate of 4.23 million tons discharged into rivers, lakes, and seas in Suizhong was as low as 20.
Wastes from fly ash and coal resources reuse will seriously pollute the water quality and atmosphere, damage human health, and use large amounts of land to consume funds. On the other hand, due to its physical and chemical properties, Determined it is a very exciting development of mineral resources.
Based on comprehensive utilization of fly ash and technical level, it is divided into ball-and-thick composite anti-corrosion and thermal insulation materials in terms of internal and external use, and it is used in the low-bounded high-tech fly ash ablative utilization industry. Anti-corrosion protection, the market prospects of the material is broad. About Sun Shaoqi 154. Blade, engineer. Chemical Industry Newsletter Address Tiefing City, Xifeng County
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