LED is widely used in lighting, display, backlight and many other fields due to its high efficiency, energy saving and environmental protection. With the continuous improvement of brightness and power, high power has put forward higher requirements on the aging resistance, refractive index and transmittance of packaging materials. Conventional epoxy resin encapsulants cannot meet the requirements of high-power packaging materials due to problems such as aging, large internal stress, and poor thermal stability. They are gradually being replaced by silicone materials, but the heat resistance and refractive index of organic cassia materials are still To be further improved, the main work of this paper is as follows: The structure of phenyl hydrogen and vinyl hydrazine synthesized by metal induced salt formation and chlorosilane was characterized by infrared spectroscopy, nuclear magnetic resonance spectroscopy and gel permeation chromatography. The effects of water, coordination metal ions and solvents on the product of metal polysiloxane oxy-combustion complexes during the synthesis were investigated. The silicone resin with annular network structure was prepared by hydrogenation of phenyl hydrogen with vinyl silicon hydrogen. The test results showed that the initial decomposition temperature of silicone resin was 484 °C, and the mass residual ratio was 79.6% at 1000 °C. Has excellent heat resistance.
Introduction of organic silicone packaging materials
The main chain of the organic silicon material is a bond structure, and the molecular chain is arranged in a spiral shape. This special hetero-chain molecular structure gives the organic silicon material many excellent properties: (the bond length and the bond bond angle are relatively large, and the opposite side of the bond The rotatory resistance of the base rotation is small, the segment is very compliant, and has good low temperature resistance; (the bond energy is relatively high, such as the bond energy of the bond, and the bond energy of the bond is high, which enables it to have good thermal stability. And weather resistance, can be used in a wide temperature range (working; (the surface energy of organic laurel materials is low, so that it has good hydrophobicity, low surface tension and flexibility can greatly increase the permeability of the polymer. The organic silicon has high light transmittance, good thermal stability, excellent ultraviolet light resistance, small internal stress and low hygroscopicity, and its performance is obviously superior to that of epoxy resin, which is an ideal packaging material. Material market.
As shown in the figure, the organic Gui industry chain shows the coarse Guiyuan, which is made up of cinnamon powder and chlorinated kiln in the upstream. After steaming, it obtains a few industrially valuable monomers such as dimethyl chloride shoe last, and then it is made into organic organic industry. The most critical intermediate between upstream and downstream - polyoxygen. Downstream is the use of polycreamite to synthesize cassia oil, cassia rubber and other products. The company can also directly prepare cassia resin, cassia coupling agent and other products. The organic laurel monomer has a long production process, complex process, high technical content, and investment. Larger, currently there are mainly foreign Corning, Momentive, Wacker, Shin-Etsu, which have been sold to Bluestar five companies to produce organic cassia monomer on a large scale. Domestically, there are mainly Blue Star Fire, Xin'an Chemical, Shandong Dongyue and other organic gui Monomer manufacturer.
In 2009, the supply and demand situation of World Organic Gui is shown in the table. According to the calculation of 100% Juuiyuan Hospital, the total consumption of polysiloxane in the world in 2009 reached 1.414 million tons, of which China accounted for 30.2%, the largest consumption, followed by Western Europe, North America. In recent years, the Asia-Pacific region has experienced rapid economic growth and high-tech production in some developed countries in Europe and America.
The shift to the region has stimulated the consumption of organic baby. The consumption of poly-waxy hospitals in the Asia-Pacific region reached 667,000 tons, which has promoted the rapid development of the global organic industry.
Affected by the economic crisis, the global chemical market demand has shrunk sharply in 2009. The sales and profits of most companies have declined. The organic market is also affected by economic deterioration. In addition to Bluestar Organic, the sales of several large organic companies in the world. There are different degrees of decline. Table 1.2 lists the sales of the organic organic company in the company. It can be seen from the table that Dow Corning, Momentive, Wacker and Shin-Etsu are the four organic companies in the world. The share of the organic baby market, in which Dow Corning accounts for 82% of the global market, far ahead of other companies.
Research progress on organic packaging materials
Organic laurel materials can be divided into low refractive index and high refractive index according to different refractive indexes. The low refractive index is mainly composed of methyl organic laurel materials, the refractive index is about 1.41, and the high refractive index is phenyl type. The organic silicon material is mainly composed, and the refractive index is about 1.53. At present, there are many patent documents in foreign countries that report organic silicon materials for LED encapsulation. Almost all patent documents use two-component encapsulation materials, and use an oxygen-containing polyoxygenate and an organic bond containing unsaturated bonds. The hydrogen hydrogen addition reaction is carried out under the action of a catalyst. The solidification method does not foam, has no by-products, has small shrinkage, and is easy to control, and is widely used for the synthesis of organic silicon packaging materials.
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