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A special blow molding material for automobile plastic fuel tank and its preparation method

A fuel tank and plastic technology, applied in the field of blow molding materials, can solve the problems of difficulty in supplying imported fuel tank materials, high price of automobile plastic fuel tanks, and high cost of automobile plastic fuel tanks, and achieve excellent environmental stress cracking resistance. Excellent toughness balance and reasonable molecular weight distribution

Active Publication Date: 2018-05-29
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, due to the constraints of the production process, the domestic HDPE production equipment is difficult to produce special materials for automotive plastic fuel tanks that meet the requirements and can be applied to six-layer fuel tanks. Moreover, the safety performance requirements of fuel tank materials are high, which needs to be subject to the safety performance of the automotive industry. With many certification tests, the localization of automotive plastic fuel tanks has become a difficult problem to solve
Special materials for automobile fuel tanks have to rely heavily on imports, and the raw materials are expensive. The price of imported HDPE fuel tank materials is 14,500 to 18,000 yuan per ton, and it is difficult to guarantee the supply of imported fuel tank materials, which leads to high manufacturing costs of automobile plastic fuel tanks. box is very expensive

Method used

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  • A special blow molding material for automobile plastic fuel tank and its preparation method
  • A special blow molding material for automobile plastic fuel tank and its preparation method
  • A special blow molding material for automobile plastic fuel tank and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Raw materials for ethylene-hexene copolymerized polyethylene resin:

[0051] 1) The feed rate of polymer grade ethylene is 28t / h

[0052] Ethylene: purity ≥99.20% C 2 h 2 ≤5×10 -6 CO≤1×10 -6

[0053] o 2 ≤2×10 -6 h 2 O≤1×10 -6 COS≤0.02×10 -6 .

[0054] 2) Catalyst: NTR-973 dosage 250kg / h

[0055] 3) The amount of 1-hexene added is 504kg / h

[0056] 1-Hexene: Purity ≥98.5% H 2 O≤20×10 -6 CO≤5×1O -6

[0057] Mono-olefins≥98.5% Isomerized alpha-olefins≤1% Normal non-alpha-olefins≤1%

[0058] Normal alpha olefin≥96% Peroxide≤1×10 -6 Sulfur≤1×10 -6 .

[0059] 4) diluent isobutane 36kg / h

[0060] Isobutane: Purity≥95.0% Acetylene≤2×10 -6 Total sulfur≤1×10 -6

[0061] Total olefins≤100×10 -6 Water≤20×10 -6 o 2 ≤5×10 -6 .

[0062] The preparation method of ethylene-hexene copolymerized polyethylene:

[0063] The diluent isobutane is always in a circulating state. The ethylene and hexene are respectively injected into the loop reactor, and the...

Embodiment 2

[0072] Raw materials for ethylene-hexene copolymerized polyethylene resin:

[0073] 1) The feed rate of polymer grade ethylene is 36.2t / h

[0074] Ethylene: purity≥99.20% CO≤1×10 -6 o 2 ≤2×10 -6 h 2 O≤1×10 -6 .

[0075] 2) Catalyst: NTR-973 dosage 249kg / h

[0076] 3) The amount of 1-hexene added is 513kg / h

[0077] 1-Hexene: Purity ≥98.5% H 2 O≤20×10 -6 CO≤5×1O -6 Isomerized alpha olefins ≤ 1%.

[0078] 4) diluent isobutane 34.8kg / h

[0079] Isobutane: Purity≥95.0% Acetylene≤2×10 -6 Total sulfur≤1×10 -6

[0080] Total olefins≤100×10 -6 Water≤20×10 -6 o 2 ≤5×10 -6 .

[0081] The preparation method of ethylene-hexene copolymerized polyethylene resin:

[0082] The diluent isobutane is always in a circulating state. The ethylene and hexene are injected into the loop reactor respectively, and the catalyst is added to carry out the synthesis reaction. The reaction temperature in the reactor is controlled at 90.2°C, and the ethylene feed rate is 36.2t / h. -...

Embodiment 3

[0091] Raw materials for ethylene-hexene copolymerized polyethylene resin:

[0092] 1) The feed rate of polymer grade ethylene is 36.5t / h

[0093] Ethylene: purity ≥99.20% C 2 h 2 ≤5×10 -6 CO≤1×10 -6

[0094] o 2 ≤2×10 -6 h 2 O≤1×10 -6 COS≤0.02×10 -6 .

[0095] 2) Catalyst: NTR-973 dosage 143kg / h

[0096] 3) The amount of 1-hexene added is 293.7kg / h

[0097] 1-Hexene: Purity ≥98.5% H 2 O≤20×10 -6 CO≤5×1O -6

[0098] Mono-olefins≥98.5% Isomerized alpha-olefins≤1% Normal non-alpha-olefins≤1%

[0099] Normal alpha olefin≥96% Peroxide≤1×10 -6 Sulfur≤1×10 -6 .

[0100] 4) diluent isobutane 35.8kg / h

[0101] Isobutane: Purity≥95.0% Acetylene≤2×10 -6 Total sulfur≤1×10 -6

[0102] Total olefins≤100×10 -6 Water≤20×10 -6 o 2 ≤5×10 -6 .

[0103] The preparation method of ethylene-hexene copolymerized polyethylene resin:

[0104] The diluent isobutane is always in a circulating state. The ethylene and hexene are injected into the loop reactor respectivel...

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Abstract

The present invention discloses a special blow-molding material for vehicle plastic fuel tanks, wherein the special blow-molding material comprises the following raw materials by weight: 99.50-99.90 parts of an ethylene-hexene copolymerization polyethylene resin, 0.05-0.35 parts of an antioxidant, and 0.03-0.15 part of an auxiliary antioxidant. The present invention further discloses a preparation method of the special blow-molding material. According to the present invention, the special blow-molding material is suitable for processing molding of the single-layer and multi-layer vehicle plastic fuel tank, and further has characteristics of excellent rigid-tough balance property and good chemical resistance.

Description

technical field [0001] The invention relates to blow molding materials, in particular to a special blow molding material for automobile plastic fuel tanks. The invention also relates to a method for preparing the blow molding material. Background technique [0002] The plasticization of fuel tanks is an important direction of modern automobile plasticization. With the requirements of automobile lightweight and the continuous development of high-density polyethylene material properties, plastics are more and more widely used in automobiles, and the application of automobile plastics is even greater. It has become one of the symbols to measure the level of automobile production technology and the level of new material research and development. [0003] Compared with metal fuel tanks, automotive plastic fuel tanks are light in weight, can be integrally formed, have flexible shape design, good anti-seepage and corrosion resistance, simple production process, high efficiency and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/08C08K5/134C08K5/526C08F210/16
Inventor 岑静芸蔡伟肖树萌杜刚梁戈苏和跃张玮苏肖群梁胜彪许敏马宇罡
Owner CHINA PETROLEUM & CHEM CORP
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