Since the reform and opening up, China's socialist construction has made great progress. Epoxy resin as an important basic material, in all sectors of the national economy to get more and more applications, especially electronics, electrical appliances, transportation, construction and other industrial areas of the large number of high-tech means, the application of new materials, prompting exponential growth in the amount of epoxy resin. 1980 the national epoxy resin consumption of only 6,000 tons/year, and now it is more than 140,000 tons/year, can be seen in its use of The rapid growth, the development momentum of the fierce, have to attract the attention of the people.
As we all know, in recent years, a large number of foreign epoxy resin into the Chinese market, many township enterprises have entered the epoxy industry, so that the epoxy resin market competition is very fierce. In the face of such a situation some factories to rise to the challenge, the development of the factory characteristics of the product, such as Di Ai Sheng Epoxy Co., Ltd. of the high purity epoxy resin is almost in short supply; Huangshan City, Anhui Province, the epoxy hard resin in the market share of the growing share of these factories are currently thriving. And some manufacturers fate is not so good, the closure of the there, quit there, the more most of them are still struggling desperately, their current days are imaginable.
In the first few years, we all know to develop "marketable", "market needs" of the product, as soon as we heard the shortage of epoxy resins, epoxy resins have been on the horse, do not know that there are many varieties of epoxy resins. As a result, bisphenol A-type 6101 or E-44 epoxy resin appeared everywhere, the price fell again and again, making everyone's day is not good. If this responsibility is called entrepreneurs to bear, I think they are very wronged. In fact, engineers and technicians should bear the main responsibility, I see some users of the drawings on the existence of such problems: for example, the technical requirements of the transformer preparation charts only specify the epoxy resin casting, with the general epoxy resin casting line? Another example is the building plans only specify the floor with epoxy resin, and different functions of the floor should be used in different epoxy resin designers know? Why not specify it on the plan? Some in the outdoor use of the setup also only specified with epoxy resin potting, in fact, these epoxy resin have special requirements. It should be noted here that some engineers and technicians are not good either. Their design drawings are made with reference to foreign forms, but they do not understand the difference between the domestic and foreign epoxy industry. This is the "epoxy resin" and "epoxy system" is different. Overseas general-purpose epoxy resin generally refers to 828, 331, 850 and other basic resins, while the domestic 6101, E-44 is the main. Foreign special-purpose epoxy resin and curing agent, active diluent, additives, fillers and other supporting into a special "epoxy system", collectively known as: "Epoxy system". The domestic "Epoxy system" has not yet formed a climate, is still in the "Epoxy resin" stage, which is two different concepts. For this reason, I think the epoxy resin must be product structure adjustment to adapt to the international situation needs.
From the epoxy resin application industry development point of view, such as automobile manufacturing industry, construction industry, chemical industry and household appliances products, the rapid development of paint, laminating materials, adhesives, casting material dosage is growing. One of the industries that use epoxy resin more is the copper-clad laminate production industry. Whether it is automobile, home appliances, computer circuit boards have to use copper cladding board, and the introduction of copper cladding board production line of the country, coupled with the wide range of the original domestic production line, in the area of epoxy resin in the last two years the annual consumption of about 40,000 tons, the main use of epoxy resin grades for the EX-23-A80, EX-48-T60, DER521-A80, DER512-A80, EPN1138A-85, EPN8011A-75 and so on. Secondly, the powder coating industry use epoxy resin is also a large amount, the country has more than 600 large and small powder plant, the introduction of more than 60 production lines, the annual epoxy resin used in this area amounted to more than 20,000 tons, the main use of resin grades for EPO1004, DER663U, YD-014, E-12T, 0194 and so on. In addition, solvent-free, solvent-free, water-based coatings in recent years, the development of faster, especially for automotive electrophoretic coatings, heavy-duty anticorrosive coatings for containers, anti-corrosive coatings for oil and gas pipelines, etc., the use of EPO828, DER331, E-51, 850S, and other grades of resins almost exceeded the original amount of solid epoxy resins used in this area in recent years, the use of epoxy resins nearly 20,000 tons / year. In the last two years, dry-type transformers, transformers, insulators, high-voltage switch to use the amount of epoxy resin to more than 60% of the rate of growth in the country *** counted more than 500 of such production plants, mainly using E-42, E-39D, CT-200, CY-225, EPO-834, YD-134, F, B, EPO828, DER-331, 0164 and other grades of epoxy resin, last year, the use of epoxy resin nearly 20,000 tons / year. Grades of epoxy resin, last year's annual consumption of 20,000 tons. Coupled with the recent development of the rapid development of adhesives, resistive coatings, decorative coatings, floor coatings, automotive ignition, motorcycle ignition, storage batteries, light-emitting diodes and signal lamps, electrical wiring sealing material, etc. in recent years, the amount of use has also increased significantly. The development of these industries, the epoxy resin used is no longer 6101 or E-44 epoxy resin as the main body. And China's existing more than 140 epoxy resin production plants, most of the production of 6101, E-44 products, which is how to keep up with the development of the situation? From this point of view that the epoxy resin is also necessary for product structure adjustment.
China's epoxy resin production plant, can be said to be the world's first! This is not a good phenomenon. Not to mention the small amount of its wide range of sources of pollution, waste of resources, low production efficiency, high cost shortcomings. The main thing is that this is not in line with the strategic policy of sustainable development, the long term must be a dead end, many small chemical plants have proved the fact that the closure of this. Then why not restructure the existing product base? In order to be invincible in the fierce competition in the market. I believe that many astute entrepreneurs have thought of this, but also want to do this in practice, only to be limited by certain conditions and did not have time to do. I'm not an entrepreneur, but I understand a truth: "Things happen to people". Someone has to do the work, to explain the pros and cons, and to strive for the understanding of all parties. As long as it is beneficial to the country and the people, governments at all levels will support it, the people will embrace it, and the greatest difficulties can be overcome.
Here I just stand in the technical point of view to put forward some ideas on the adjustment of epoxy resin product structure for your reference.
1, change the 6101-based product ideas
For a long time, China's epoxy resin production are 6101 (or E-44) as the main product. And the basic resin 618 (or E-51) production is very little, which is the fact that our country in the past the production of glass fiber reinforced plastic by hand. Nowadays, although hand operation still exists, such as large storage tank lining FRP corrosion layer, large area lining glass cloth flooring, etc., these occasions can not be automated operation is still to be used, but most of the applications have been automated operation of the assembly line, a lot of imported technology has been used to produce foreign countries, which require low viscosity, good operating performance of the epoxy system products. 6101 has been unable to meet the requirements. Such requirements. For this reason, we can not hold on to 6101 this product, but should expand the idea of production of solvent-free, low-viscosity, or modified new products.
If we must produce 6101 epoxy resin, we must also try to improve the original production process, reduce consumption, reduce costs and improve quality. For example, the preparation of mica board insulation materials must be this raw material, such as making features, into a special resin system is also very vital.
2, the development of the current shortage of epoxy resin system products
Currently, China's annual use of epoxy resin has reached about 140,000 tons, two-thirds of which rely on imports. Domestic epoxy resin to bisphenol A-based, and curing agent, active diluent, additives, etc., supporting incomplete, not a system. Now more than 140 production of epoxy resins, most of the factory in the bisphenol A-type epoxy resin whirling runway, and some of the prospects for good runway are let to foreigners really do not understand! For example, heat-resistant series, flame-retardant series, water-soluble series, high purity series of products, few domestic manufacturers. In fact, phenolic epoxy, o-cresol formaldehyde epoxy, bisphenol F epoxy, alicyclic epoxy, phosphorus-containing epoxy and other modified epoxy are currently optimistic about the product. Why don't domestic manufacturers look at them?
I asked some entrepreneurs this way, and the entrepreneurs asked me a question: who wants to produce these? This question is indeed difficult for me. Because there are products do not see all can be sold out, sold out sold out a lot of factors, both quality issues, and price issues, and public relations issues ....... I also do not know how foreign manufacturers can sell tons of these products in the Chinese market every year, which is their trade secrets ah! But this problem can be solved by the entrepreneurs themselves: a feasibility study should be conducted before the start of the project.
3, the development of new products conducive to environmental protection
All walks of life are now very much focused on environmental protection, the market appeared a lot of "green" products, for the use of raw materials also put forward in this regard. For example, the production of copper cladding boards in the production of a large number of brominated epoxy resin, flame retardant electrical castables are also a large number of brominated epoxy resin, and the use of bromide will destroy the structure of the ozone layer of the atmosphere, and has been subjected to certain restrictions. Although now brominated epoxy is very good sales, but such days will not last, the production of non-halogenated flame retardant epoxy resin has long been on the agenda. Who is not in the morning is who took the initiative?
There is the paint industry, in order to reduce solvent pollution of the atmosphere, put forward no solvent or less solvent, water solvent, high solids content, light curing direction of development. This requires epoxy resins also to meet such conditions, the development of appropriate products to occupy this market.
In environmental protection work, in fact, epoxy resin system can play a big role, such as the use of its excellent adhesive properties and good mechanical strength, will be some of the waste (broken glass, fiberglass, residue, etc.) bonded into useful materials. In the transformation of desert areas epoxy resin as a desert building materials more drama to sing. I think the sand film area is characterized by more sand and gravel, less water. Desert building materials should be based on this feature to think. According to my thirty years of experience in the production and application of epoxy resin, I think the development of synthetic materials, "desert building materials" is the most ideal. First, this kind of material molding does not need water, second, this kind of material used in sand, stone can be local materials, third, this kind of material physical and mechanical strength is very high. (Specific data, preparation methods can be seen: "China Epoxy Network" self-leveling flooring content.) There are also raw materials such as epoxy resin, curing agent, etc. in our country has a lot of factory production, supply is not a problem. Of course, according to the specific requirements of building materials can also be used as raw materials for other types of synthetic materials. There is also the transformation of the desert need to use some other corrosion-resistant pipeline, sand and sand measures, equipment, such as in the local preparation should minimize the use of cement, because the desert water is very valuable! For this epoxy resin and other synthetic materials is a good choice. Transformation of the desert this is the biggest contribution to environmental protection work, in these uses on the quality of epoxy resin requirements are different from electrical appliances, coatings, so strict, if the development of inexpensive and beautiful products for the environmental protection work to make a big contribution is also possible.
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