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What is Yichang's production of polyurethane

Release time: 2020-02-09 02:36:17

Chlorinated paraffin 70 is a resin-like powder, white or light yellow, with a relative density of 1.65 (25/4 ° C).

The oligomer polyols commonly used in the preparation of water-based polyurethane resins are mostly polyether diols and polyester diols. Sometimes they are also used.

Polyurethane insulation boards that have only appeared in recent years are a big savior for these problems in construction projects. However, in addition to the two functions mentioned above, which are most needed in engineering, polyurethane insulation boards. It can even provide sound insulation and vibration absorption, and these excellent properties are unmatched by previous traditional materials. It also has super strong adhesiveness, and there is no need to add additional adhesive during use. This can not only save costs but also reduce the environmental impact of the project. The long service life also saves engineering. A lot of late costs.

Hard polyurethane has low thermal conductivity and good thermal performance. When the rigid polyurethane bulk density is 38-45㎏ / m, the thermal conductivity is only 0.018g-0.023w / (mk), which is equivalent to about half of EPS, which is the lowest thermal conductivity of all thermal insulation materials.

Polyether can be used as a crude oil demulsifier, L64, F68 can effectively prevent the formation of hard scale in oil pipelines, and for the recovery of secondary oil.

Polyurethane material has a stable porosity structure, which is basically a closed-cell structure. It not only has excellent thermal insulation performance, but also has good freeze-thaw resistance and sound absorption. The average life of rigid foam polyurethane insulation structure can reach more than 30 years under the conditions of normal use and maintenance. Under normal use conditions of the structure's life, it can not be damaged under the influence of external factors such as the growth of insects, fungi or algae, or the damage of rodents.

The characteristics of polyurethane insulation pipes: The service life of polyurethane insulation pipes can reach 30-50 years. Correct installation and use can make the maintenance cost of the pipe network extremely low. Polyurethane insulation pipes also have good corrosion resistance and impact resistance under low temperature conditions, and can be directly buried in frozen ground. An alarm system can be set up to automatically detect leakage faults in the pipe network, accurately indicate the location of the fault and automatically alarm. Polyurethane insulation pipes have good insulation performance, and the heat loss is only 25% of traditional pipes. Long-term operation can save a lot of energy and significantly reduce energy costs. It has strong waterproof and anti-corrosion ability, no need to attach a pipe trench, and polyurethane insulation pipes can be directly buried in the ground or water. The construction is simple and fast, and the overall cost is low.

Construction materials—In developed countries in Europe and the United States, rigid polyurethane foam used in construction accounts for about 70% of the total consumption of rigid foam, which is more than double the amount of rigid foam used in refrigerators and freezers. In China, the application of rigid foam in the construction industry has not yet As common as developed western countries, the potential for development is very large;

Polyurethane composite board has superior thermal insulation performance and product characteristics. It is officially used in the construction industry. Metal sandwich panels are widely used as walls. Metal sandwich panels are filled with flame-retardant polyurethane in the middle of two metal panels. The external wall insulation composite board is compounded. The polyurethane external wall thermal insulation composite board reaction mixture is directly injected into the cavity between the inner and outer walls, the material foams in the cavity, and the foam is combined with the wall to form a whole.

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