Current situation and trend of the hottest archite

Current situation and trend of architectural coatings at home and abroad

current situation and trend of architectural coatings at home and abroad

August 22, 2003

at present, the main production areas of architectural coatings in the world are Europe, North America and East Asia, the United States, Japan, Germany, Britain

countries are in a leading position in coating production technology, varieties and development efforts, and the main consumer markets of architectural coatings are in Europe

and Asia Pacific

in 2000, the total output of architectural coatings in the above five countries was about 7.45 million tons, accounting for 49.7% of the world's total output (15million tons). In addition to the above five countries, Britain, the Netherlands, Italy, France and Spain are also important producers and consumers. In recent years, the development of architectural coatings in Thailand, Taiwan Province of China and South Korea is also very serious, and the oil leakage is fast

at present, the medium and high-end products of synthetic resin architectural coatings, inorganic architectural coatings, and inorganic/organic composite architectural coatings in industrial developed countries account for more than 90% of the total amount of architectural coatings. In the recent 6 and 7 years, the annual growth rate of their output has been

1%-3%, and the annual growth rate in China is more than 10%

according to foreign reports, the world trade volume of architectural coatings in 2000 was 650000 tons, accounting for about 4% of the total output, of which the United States exports about 470000 tons and Japan exports about 50000 tons. In 2000, the world trade volume of architectural coatings reached US $1.5 billion, accounting for 4.9% of the total sales

at present, the development of coatings in the world strives to comply with the "4E" principle, namely economy, efficiency, ecology and energy. On the basis of this principle, the product structure of architectural coatings is constantly changing and improving

on the basis of the "4E" principle, reducing the content of VOC is the general trend of the development of architectural coatings in the world

1. High solid coating

this kind of coating has a particularly high solid content, with little solvent emission during construction, and has advantages in protecting the ecological environment. The development of high solid coating is to reduce the molecular weight on the premise of ensuring the performance of the coating, so that the molecular weight can be narrowly divided into

cloth, so as to reduce the viscosity of the resin and reduce the amount of solvent during construction. At present, the focus of foreign research and development is

low temperature or normal temperature curing type and functional group reaction type. Its requirements are high solid

bulk coatings with fast curing, acid and alkali resistance and good abrasion resistance

2. Water based coatings

water based coatings are divided into two categories: water emulsion coatings and water-soluble coatings

at present, water emulsified polyurethane coating, water floating epoxy resin coating and water emulsified silicone coating occupy an increasingly important position in the international market. Water soluble coatings are mainly water-soluble inorganic coatings, The main "varieties are inorganic silicon

acid salt (and modified silicate) And silica sol coating. Inorganic coatings have excellent weather resistance, washing resistance, pollution resistance and other advantages. However, the disadvantages of water-soluble inorganic coatings are poor film-forming property, brittleness and poor flexibility

therefore, foreign countries use various materials and organic resins for modification, so that the coating has the advantages of both inorganic materials and organic materials

3. Powder coating

the advantages of powder coating are no solvent pollution, 100% film formation, lower energy consumption than water-based coating and high solid coating

, and the film has excellent mechanical and corrosion resistance, so it has become one of the development directions of architectural coatings. Powder

architectural coatings are mainly used for the coating of doors and windows, fences and building pipes. Some polyester/polyurethane powder coatings have been widely used in European countries. The development direction of powder coatings is to develop low-temperature curing and rapid curing powder coatings, thin

layer powder coatings, fluororesin powder coatings suitable for high-rise buildings, bridges, highways, low gloss powder coatings, transparent powder coatings, etc

4. Radiation curing coating

this kind of coating is a kind of coating that takes unsaturated resin and monomer as the base material, adds initiator, and cures with sunlight, ultraviolet light and electron beam

. The main advantages are solvent-free and less pollution. At present, unsaturated polyester, poly

ester acrylic acid, epoxy acrylate, polyurethane acrylate, polyether acrylate and other free radical light curing or UV

light curing coatings are used in construction. 2.2.1 selection and characteristics of a/d converters. A/d conversion chips have a wide variety of coatings with different properties and great price differences

5. Super weather resistant coating

super weather resistant coating is represented by fluororesin coating, with artificial aging of more than 4000H and outdoor weather resistance of more than 20

years. It has the advantages of pollution resistance, strong adhesion, heating and curing, and drying at room temperature. Its performance is similar to that of fluororesin, and it can be widely used in various wall surfaces, slate, cement and other substrates. Moreover, the cost of this kind of coating is higher than that of fluororesin coating

6, functional coating

in recent years, foreign functional building coatings have developed rapidly, and many new varieties have been developed for fire prevention, water prevention, insect prevention, mold prevention, corrosion prevention and rust prevention of buildings, However, its development is based on the development of synthetic resin

styrene acrylate copolymer lotion and styrene acrylic emulsion paint are commonly used for exterior wall coatings in China. They have good water resistance, alkali resistance, wiping resistance, weather resistance, adhesion, moderate price and stable preparation process, so they are used as general products for the preparation of exterior wall coatings. Styrene acrylic lotion can also be used to make interior wall coatings, including gloss paint, semi gloss paint and matte paint

during the Tenth Five Year Plan period, China's annual construction area will reach billion cubic meters. It is estimated that in 2001, the sales volume of architectural coatings will reach 1million tons. The architectural coating market will face new opportunities. After joining the WTO, the competition in the coating market will be more intense, and the construction coating enterprises will face the challenges of both international and domestic markets. Opportunities and challenges coexist, and the fittest will be eliminated. The construction coating enterprises and market will develop in a healthy direction