On the MBS impact modifier of the main properties and applications

Abstract: This paper describes the MBS impact modifier of the main properties, such as excellent transparency, good wear resistance, and summarizes the application of its international and domestic consumption are reflected MBS resins have good market prospects.

Keywords: MBS, performance, application

MBS (Methylmetharylate-Butadiene-Styrene) is a concept in particle design a new polymer materials synthesized by methyl methacrylate (M), butadiene (B) and styrene (S) by emulsion graft polymerization from. submicroscopic morphology of the typical core-shell structure, the core is a 10nm ~ 100mm diameter rubber phase spherical nucleus, the external is composed of styrene and methyl methacrylate shell. As methyl methacrylate and polyvinyl chloride (PVC) of the solubility parameter similar to that in the PVC resin and rubber adhesive interface between the particles play a role in the PVC processing with the formation of homogeneous mixing process, I and the products superior impact resistance. Dang PVC, adding 5% -10% of the MBS ��֬ time, can improve the impact strength of products 4 times -15 times, but also improve the cold tolerance of products and processing flow, the refractive index index is similar to PVC with MBS impact modifier for PVC will not affect the transparency of PVC. MBS is to improve PVC impact resistance, the best material to produce a transparent product, almost all of the transparent PVC products are used as erosion modifier. Therefore, MBS resin, PVC resin as impact modifier has a broad application prospects.


1 MBS impact modifier of the main performance

MBS impact modifier has excellent transparency, good abrasion resistance, color and more general low temperature properties. The refractive index is similar to PVC, is used for PVC transparent products modified to produce the best material. In general, MBS and PVC in the blend compatibility when appropriate, and to the stability of the blends can be improved. MBS glass transition temperature is relatively low, so low in a certain extent to enhance the impact resistance of PVC . to improve the toughness of PVC and processing performance is another important performance of MBS, which increase the friction of the particles to promote disintegration of PVC gel and further shorten the melting time, reduce the residence time, to prevent decomposition, and ultimately improve the processing performance.


2 and consumption of international application

Since the specific circumstances of different countries around the world, PVC products, different product mix, processing habits, consumption of various types of impact modifier structure were quite different. North America ACR impact modifier is based, total consumption of 54 %, followed by MBS, 34% of total consumption. Western Europe to MBS based impact modifier, and its consumption of 54% of total consumption, followed by the ACR, 38%. The Japanese impact modifier MBS is based, 34% of total consumption, followed by the EPT (ethylene - propylene - diene terpolymer), accounting for 33%. the three regions CPE consumption volume below 6%. now MBS world consumption of more than 280 kt. PVC products because the structure of various countries and regions, the processing of different formulations. MBS consumption structure is also different. which the United States each year MBS impact modifiers for PVC's 40kt above, mainly used in transparent PVC bottles, rigid film, sheet, etc.. MBS in France, Italy and Spain and other European countries, mainly used in bottles, mainly used in PVC in Germany sheet, film and other fields. In Japan, MBS's annual PVC impact modifier at about 20 kt, mainly used for sheet, film, 65% of total consumption, accounting for 15% with a blow bottle, profile areas such as accounting for 20%. MBS resin as rigid PVC The impact modifier, the demand in Japan has become saturated. In this case, the Japanese companies are weathering resistance of acrylic ester as the development focus of abrasion enhancer. Meanwhile, as the special modification of engineering plastics agent is continuously strengthened. such as Japan, Kaneka developed KaneAce M is designed to enhance the development of engineering plastics resins, engineering plastics can greatly improve the low temperature strength and processing properties, the Japanese company Kureha Chemical enhancer in terms of engineering plastics are constantly developing new products, Mitsubishi Rayon Company is also committed to PVC impact modifier resin other than study, has been developed for PBT and PC modifiers and other new varieties. With the growing proportion of rigid PVC products improved impact modifier increasing demand, but the growth ratio was also different. North America, Europe, demand for MBS about 1% to 3% growth rate in Japan partly because of PVC transparent PET bottles and replace the PS product, which reduction in the amount of MBS. estimated that by 2010 the United States, Europe and Japan and other major consumer countries and regions the demand for MBS will reach 310 kt, average annual growth of about 1.7%.

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At present, the total output of MBS resin is about 30,000 t, the total demand of about 40,000 t, demand gap larger. By 2010 the total demand will reach about 5.5 million t, the average annual growth rate of demand than 7.0%. mainly in the following aspects: First, the rapid development of China's PVC products industry, stimulated the development of impact modifier .2004 apparent consumption of PVC in China was 7.09 million t, 2006 ��increased to 9,191,000 t, is expected to more than 10 million in 2010 t, as PVC impact modifier species commonly used one, the demand will increase. Second, as the product structure of impact modifier adjustment, MBS impact modifier resin will become the main species. At present, the impact modifier in the processing is still at the development stage, yield, variety, quality, function and so modified the larger the gap with foreign countries. The main varieties of foreign output sort is by ACR, MBS resin and EVA, which is sort of the CPE, ACR and MBS resins. in which the production of inefficient excess capacity CPE products, with excellent overall performance of the ACR and MBS modifier Resin development is relatively slow, particularly less MBS resin production. Third, MBS resin applications continue to expand. In recent years, the world's MBS resin consumption has gradually shifted from the original hardware products covered by the semi-hard products and soft products , MBS resin modified with PVC pipe can be made of impact resistant, transparent sheet and the hardware and software products, transparent bottles made from abroad to fill with mineral water, cooking oil and cosmetics containers, is gradually replacing glass products and polyester products. Japan, Germany, semi-rigid food packaging and film materials in the field of MBS resin consumption has accounted for a large proportion of the area of ​​the U.S. MBS resin exterior wall coating applications have begun to dramatically increase. But in our country , MBS Shuzhi only for PVC transparent sheet, film, transparent bottles fields. There are small for the plates and tubes, other areas of consumption are to be further developed, so, MBS resins have good market prospects in China . Links http://www.hi138.com Research Papers Download