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Adhesive for anticorrosive paint for deep-sea oil-gas delivery steel tube outer walls and preparation method thereof

A technology of anti-corrosion coatings and adhesives, applied in the direction of adhesives, adhesive additives, non-polymer adhesive additives, etc., can solve the problems of poor low-temperature impact of polypropylene, achieve good mechanical properties, long service life, and good processing sexual effect

Inactive Publication Date: 2014-10-08
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an adhesive used for the anti-corrosion coating on the outer wall of deep-sea oil and gas transportation steel pipes, so as to improve the shortcomings of polypropylene itself, which has poor low-temperature impact resistance, and has good mechanical properties and production and processing properties.

Method used

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  • Adhesive for anticorrosive paint for deep-sea oil-gas delivery steel tube outer walls and preparation method thereof

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preparation example Construction

[0056] The preparation method of the adhesive used for the anti-corrosion coating on the outer wall of the steel pipe for deep-sea oil and gas transportation comprises the following steps:

[0057] a. Mix the raw materials and stir evenly, the stirring speed is 650~850 rpm;

[0058]b. Put the fully mixed raw materials in step a into the twin-screw extruder for mixing and plasticization; control the speed of the twin-screw extruder so that the mixture stays in the entire screw for 2 to 3 minutes, and set the temperature of each section in turn Set at 175°C, 180°C, 185°C, 190°C, 200°C, 200°C, 195°C, 185°C and 175°C, and set the speed of the pelletizer at 550~750 rpm during the pelletizing process;

[0059] c. The rod is water-cooled, and the water temperature in the water-cooling tank is set at 35~50°C;

[0060] d. Air-dried and granulated, extruded, granulated and packaged to obtain the adhesive.

Embodiment 1

[0063] (1) Raw materials:

[0064] Polypropylene: PPB4228

[0065] Functional polyolefin: EPDM rubber, ethylene-vinyl acetate copolymer

[0066] Reactive monomer: maleic anhydride

[0067] Graphene

[0068] Nano-CaCO 3

[0069] Initiator: di-tert-butyl peroxide

[0070] Nucleating agent: 1,3,2,4-bis(3-methyl-4-benzyl)sorbitol

[0071] Antioxidant: main antioxidant 1010, auxiliary antioxidant 168

[0072] According to the mass percentage, the ratio of the above raw materials is: 55% polypropylene, 30% functional polyolefin, 6% reactive monomer, 2% graphene, nano-CaCO 3 5%, initiator 0.1%, nucleating agent 0.4%, antioxidant 1.5% (of which the main antioxidant is 1%, and the secondary antioxidant is 0.5%).

[0073] (2) Preparation method:

[0074] 1. Mix the above raw materials and stir evenly, set the stirring speed at 650~850 rpm;

[0075] 2. Put the fully mixed raw materials in step 1 into the twin-screw extruder for mixing and plasticization; control the speed of th...

Embodiment 2

[0079] (1) Raw materials:

[0080] Polypropylene: PPB4228

[0081] Functional polyolefin: EPDM rubber, ethylene-vinyl acetate copolymer

[0082] Reactive monomer: maleic anhydride

[0083] Graphene

[0084] Nano-CaCO 3

[0085] Initiator: dibenzoyl oxide

[0086] Nucleating agent: 1,3,2,4-bis(3-methyl-4-benzyl)sorbitol

[0087] Antioxidant: main antioxidant 1010, auxiliary antioxidant 168

[0088] According to the mass percentage, the ratio of the above raw materials is: 60% polypropylene, 28% functional polyolefin, 4% reactive monomer, 1% graphene, nano-CaCO 3 5%, initiator 0.2%, nucleating agent 0.6%, antioxidant 1.2% (of which the main antioxidant 1010 is 0.8%, and the auxiliary antioxidant 168 is 0.4%).

[0089] (2) Preparation method:

[0090] 1. Mix the raw materials and stir evenly, set the stirring speed at 650~850 rpm;

[0091] 2. Put the fully mixed raw materials in step 1 into the twin-screw extruder for mixing and plasticization; control the speed of the ...

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Abstract

The invention provides an adhesive for an anticorrosive paint for deep-sea oil-gas delivery steel tube outer walls and a preparation method thereof. The adhesive is prepared from the following raw materials in percentage by mass: 55-70% of polypropylene, 20-30% of functional polyolefin, 2-6% of reactive monomer, 1-3% of graphene, 2-5% of nano CaCO3, 0.1-0.6% of initiator, 0.4-0.8% of nucleating agent and 0.1-1.5% of antioxidant. The preparation method comprises the following steps: mixing the raw materials, stirring uniformly, putting in a double screw extruder, carrying out compounding and plastifying, drawing, cooling with water, airing, granulating, extruding for granulation, and packaging to obtain the adhesive. The adhesive has excellent mechanical properties, higher low-temperature impact resistance and wide application range.

Description

technical field [0001] The invention relates to the technical field of anticorrosion of steel pipelines, in particular to a preparation method of a polypropylene adhesive used for anticorrosion coatings on the outer walls of steel pipes for deep-sea oil and gas transportation. Background technique [0002] As an important energy and strategic material of a country, oil and gas resources play a vital role in the fields of modern military, industry and human life. With the depletion of onshore oil and gas resources caused by over-exploitation, the competition, exploitation and utilization of offshore oil and gas have become the focus and focus of military, political, economic and diplomatic concerns of all countries in the world today. At present, the development of offshore oil and gas resources is usually transported by large ships and pipelines. Among them, submarine pipeline transportation has the outstanding advantages of high safety performance and low cost, and has been...

Claims

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Application Information

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IPC IPC(8): C09J123/14C09J123/16C09J123/08C09J11/04C09J11/06
Inventor 姚正军徐丹周金堂李天明刘沛江
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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