Qilu Petrochemical Company metallocene polyethylene roll plastic mPEER335HL

General situation of metallocene polyethylene at home and abroad

Metallocene catalyst is a new type of catalytic system after ZN catalytic system.
It usually consists of metallocene compound as main catalyst and a Lewis acid as co-catalyst.
It has the same single active site and can obtain products with narrow molecular weight distribution.
The comonomer distribution can also be uniformly controlled
.
The research and development of metallocene polyethylene (mPE) has greatly promoted the differentiation and upgrading of polyethylene products
.
At present, the world's major polyethylene producers, such as Exxon Mobil Corporation, DOW Chemical Corporation, Mitsui Chemicals, Total Corporation, South Korea's Daelim Corporation, Chevron Phillips Corporation, etc.
, have invested considerable human, material and financial resources to accelerate metallocene production.
The speed of catalyst development and industrial application has produced a variety of metallocene polyethylene products with high added value and excellent performance
.

Most domestic metallocene polyolefin products rely on imports.
ExxonMobil, Mitsui Chemicals, and Dow are the most important suppliers in the Chinese market
.
In recent years, a group of domestic scientific research units represented by Beijing Research Institute of Chemical Industry, PetroChina Lanzhou Petrochemical Research Institute, and Institute of Chemistry, Chinese Academy of Sciences have continuously increased their research investment in metallocene-related products and technologies, and have achieved the stage of metallocene catalyst research.
sexual outcomes
.
In recent years, Sinopec Qilu Branch has successfully developed special resins for mPE in the fields of pipes, films, and rotational molding, breaking the monopoly of foreign companies in the mPE field
.

The development process of Qilu metallocene plastic mPE R335HL

Relying on the rich experience accumulated in the production of rolling plastics for many years, Qilu Branch adopts the metallocene catalyst system independently developed by Sinopec, and uses 1-hexene as the comonomer.
Through reasonable molecular chain structure design, on the basis of pilot development, With the effective regulation technology in the industry, in October 2013, the special resin mPE R335HL for rotomolding diesel tanks for large vehicles was developed on the Unipol gas phase process polymerization device of the plastic factory of Qilu Branch, and the production process is stable
.
The resin has extremely high impact strength, environmental stress crack resistance and good processing fluidity, and is suitable for rotational molding of large diesel tanks, military packaging boxes, storage tanks and other products that require high impact performance
.

Since its development in 2013, mPE R335HL has been scheduled for many times, with production and sales of nearly 3,000 tons
.
Through extensive collection of user information, it has continuously expanded its application fields.
In addition to rotomolding various diesel tank products, it has also achieved good results in the fields of auto parts, packaging boxes, large amusement facilities, rotomolded boats and large storage tanks.
application
.
At present, the excellent performance of mPE R335HL has attracted the attention of many rotational molding companies, and great progress has been made in market promotion
.

Performance characteristics of Qilu metallocene plastic mPE R335HL

The physical and mechanical properties of two batches of metallocene rotomolding mPE R335HL in March and September 2016 were evaluated, and several common rotomolding grades on the market were collected for comparison.
The data are shown in Table 1
.

mPE R335HL is a hexene copolymer rotomolding resin produced by metallocene catalyst.
It has extremely high impact strength, environmental stress crack resistance and good processing fluidity.
It is suitable for rotomolding large diesel tanks, military packaging boxes, storage tanks, etc.
Products with higher impact performance requirements
.

DNDB7151U is a butene copolymer rotomolding resin with good physical and mechanical properties and processability.
It is widely used in large amusement facilities, car fenders, tractor roofs and other fields
.

UR6X4 is a butene copolymer rotomolding grade resin of a Korean company.
Because of its stable quality and excellent comprehensive performance, it has long occupied the domestic high-end rotomolding field.
It is mainly used in large amusement facilities, storage tanks, storage tanks and other fields.
Its sales price High for a long time
.

84X6.
21 is a butene copolymer rotomolding grade resin from American company E.
It has good comprehensive performance and affordable price.
It is also widely used in the field of general rotomolding
.

63X9U is a hexene copolymer rotomolding grade resin produced by British M Company.
It is mainly used in the rotomolding production of large storage tanks in Ningbo area.
Its MFR is low, and it is not suitable for forming rotomolding products with complex structures, and its use is relatively simple
.