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Research And Development Trend Of Blue Nitrile Rubber
Dec 21, 2018

High value-added NBR product development

1) carboxyl NBR (XNBR)

Introduction of carboxyl modification into NBR can significantly improve the wear resistance, adhesion and aging resistance of NBR [3]. The product is mainly used to prepare rubber products, adhesives and mechanical parts with higher requirements on strength, oil resistance and wear resistance [4]. It is widely used in aerospace, equipment manufacturing and other fields, and is a special high-performance NBR.

China national petroleum and petrochemical research institute is an early unit engaged in carboxyl NBR research, has developed liquid carboxyl butyronitrile and solid carboxyl NBR technology, the existing lxnbr-40, lxnbr-26 brand liquid carboxyl rubber, mainly for aerospace, national defense enterprises.In the face of increasingly fierce competition, key technologies such as carboxyl copolymerization, low gel control, and carboxyl butyronitrile latex demulsification and condensation will be deeply studied to further develop high-performance carboxyl NBR series products. It is expected that industrial batch production will be carried out in lanzhou petrochemical industry in 2015.

2) hydrogenated NBR (HNBR)

Hydrogenated NBR (HNBR), also known as high saturated NBR, partially or completely hydrogenates the unsaturated double bond on the NBR carbon chain. There are three main preparation methods: hydrogenation of NBR solution, hydrogenation of NBR emulsion and copolymerization of ethylene and acrylonitrile [5].Its main manufacturers are lanxen company (10,000 tons/year) and ruiong chemical company (12,000 tons/year), the world total production capacity of 22,000 tons/year, is the largest amount of special rubber varieties.It is mainly used in the fields of automobile oil seal, fuel system parts, automobile transmission belt, piston for drilling and holding box and mud, rubber roller for printing and textile, liner for tank belt, sealing parts for aerospace, air conditioning sealing products, damping materials, etc. [6-7].

The production and application of HNBR in China are still in the initial stage. In the early stage, only lanzhou petrochemical company built a 30-ton/year production device with the brand lh-9901 and lh-9902.Shanghai zannan technology co., ltd. launched more than 10 brands of HNBR in 2011, combining with the range of nitrile 25% ~ 50%;On the basis of the original research, the research institute of petrochemical industry has achieved breakthroughs in hydrogenation catalyst preparation, heterogeneous hydrogenation and other technologies. It is expected to achieve technological breakthroughs in the industrialization of HNBR in 2015.At the same time, some progress has been made in the processing technology, which lays the foundation for the further promotion and application of petrochina HNBR.

3) butadiene - acrylonitrile - isoprene rubber (NIBR)

Isoprene modified NBR technology (NIBR) is a kind of NBR with high strength, high elasticity, easy to process, is a special high-performance NBR.Mainly used in printing, aerospace and other fields [8].The key points are the sequence structure control of isoprene in copolymerization or grafting reaction, the viscosity control of nitrile and Mooney, and the processing coordination technology.

4) liquid butyronitrile

It mainly develops NBR, a functional liquid with carboxyl terminal, hydroxyl terminal, mercapto terminal, amino terminal and so on [9].The introduction of various groups can improve the adhesion between NBR and the interface and the compatibility between NBR and resin.The products are mainly used as adhesives, modifiers, military and civil material modification and bonding.On the basis of the existing research, China national petroleum and petrochemical research institute further conducts in-depth control and adjustment of molecular weight, precise control of viscosity and sequence structure, and develops serialized liquid NBR products.

5) powder NBR

Powder NBR is special in its excellent processing properties, its yield is about 10% of NBR yield, widely used in the field of resin modification.Lanzhou petrochemical company has a 3000t/year powder rubber device, China petroleum and petrochemical research institute has a very mature rubber powder technology, the next step will focus on the development of serialized, specialized powder rubber brand.

6) other

PVC/NBR co-precipitation adhesive, plasticized NBR, nano modified NBR is also the focus of current research, can effectively enrich the NBR product brand, improve competitiveness.

Lanzhou petrochemical NBR product brand is complete, the performance is stable, will further enhance the product quality and safety, develop low nitrile, ultra high nitrile series products, focus on the development of high value-added NBR products.In recent years, in the old plant modification, new plant construction and new product development has yielded fruitful results, improved production capacity, improve product quality, brand new development NBR products more than 10, enriched the lanzhou petrochemical NBR products brand effectively, improve the ability to resist risks, products are now able to meet different application fields in the domestic market demand for general type, special type NBR.

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