Polyurethane, the full name of polyurethane, is a general term for macromolecular compounds containing repeating urethane groups on the main chain. MDI and TDI are important raw materials for polyurethane. Polyurethane is mainly used for thermal insulation, waterproofing, anti-corrosion, etc. In recent years, with the rapid development of my country’s building energy-saving market, polyurethane rigid foam has been widely used in the field of building insulation and waterproofing, and has become one of the leading thermal insulation and energy-saving products in the market.
Compared with other single-function insulation or waterproof materials, polyurethane rigid foam has obvious advantages:
1. Polyurethane rigid foam has the function of multiple uses, and also has many functions such as thermal insulation, waterproofing, sound insulation, vibration absorption, etc.;;
2. It has excellent thermal insulation performance. It is the thermal insulation material with the lowest thermal conductivity (≤0.024, green and environmentally friendly fluorine-free foaming technology) and the highest thermal resistance among all domestic building materials. The thermal conductivity is only half that of EPS foam board;;
3. The continuous and dense skin of the rigid polyurethane foam and nearly 100% high-strength interconnected wall closed cells have ideal water impermeability. The spraying method is used for construction to achieve a continuous and seamless waterproof insulation layer, forming a seamless roof and an overall exterior wall insulation shell with excellent waterproof and impermeability performance;
4. Super self-adhesive performance (no need for any intermediate bonding material), strong bonding with roofs and exterior walls, good wind resistance and negative wind pressure resistance ;
5. The overall spraying construction completely eliminates “hot spots” and “cold bridges”. The flexible gradient technology can effectively prevent the waterproof layer from cracking;
6. Mechanized operation, automatic batching, uniform quality, fast construction and short cycle;
7. Stable chemical properties, long service life, and no pollution to the surrounding environment;
8. The open flame is self-extinguishing, and only chars without dripping when burning. The size and shape of the charring layer remain basically unchanged, which can effectively cut off the entry of air and prevent the spread of fire. , good fire safety performance.
Building energy conservation has become an important driving force for the rapid development of China’s polyurethane industry. Polyurethane rigid foam has superior thermal insulation properties, excellent mechanical properties, waterproof properties and fire protection properties. It is an indispensable building insulation material to achieve the national building energy-saving goals. Calculated based on the annual increase of 2 billion square meters of construction area in China’s construction market and the annual energy-saving renovation of 2 billion square meters of existing buildings. In the next few years, China’s building energy-saving field will require about 2 million tons of polyurethane rigid foam insulation materials every year. Polyurethane rigid foam The building energy-saving market has huge potential.
(www.gsiyuan.com ) is deeply involved in the segmented industry of polyurethane raw materials – amine catalysts; it develops and manufactures various types of amine catalysts; main products: ZF-22|ZF-20|CS90|DMDEE|BDMAEE| DMEA|DMAEE|DMACetc., suitable for sponge, molding, high rebound, self-skinning, PU toys and various hard foam and semi- Rigid foam and other end products.
