Wet type polyurethane joint material for thermal insulation for seabed oil and gas pipeline interface and preparation method of wet type polyurethane joint material

An oil and gas pipeline and polyurethane technology, applied in the field of polyurethane node materials and their preparation, can solve the problems of less than 100% closed cell rate, high water absorption rate of materials, low thermal conductivity, etc., and achieve low water absorption rate, low mold temperature, The effect of short production cycle

Active Publication Date: 2013-07-24
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are few patents published on the preparation of non-foamed polyurethane node materials for the on-site interface of submarine pipelines. Patent 201210258634.8 discloses a full-water open-cell rigid polyurethane foam for submarine pipeline joints. The thermal conductivity of polyurethane foam is low and the insulation effect is low. Good, but the closed cell rate cannot reach 100%, resulting in high water absorption and low compressive strength of the material, which is not suitable for the protection application of deep-sea wet-type thermal insulation pipeline joints

Method used

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  • Wet type polyurethane joint material for thermal insulation for seabed oil and gas pipeline interface and preparation method of wet type polyurethane joint material
  • Wet type polyurethane joint material for thermal insulation for seabed oil and gas pipeline interface and preparation method of wet type polyurethane joint material

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preparation example Construction

[0036] The following examples are used to further illustrate the preparation and application details of the present invention, and do not constitute a limitation to the spirit and scope of the present invention.

[0037] The experimental methods used in the following examples are conventional methods unless otherwise specified.

[0038] The materials and reagents used in the following examples can be obtained from commercial sources unless otherwise specified.

[0039] The raw materials used in the following examples are as follows:

[0040] Hydroxyl-terminated polysiloxane DS-3, with a hydroxyl value of 40-50 mgKOH / g, from Rhodia, France;

[0041] Polypropylene glycol (PPG-1), hydroxyl value 50-60mgKOH / g, Shandong Bluestar Dongda Company;

[0042] Polyether polyol GE-2, hydroxyl value 160-175mgKOH / g, Shanghai Gaoqiao Petrochemical;

[0043] 1,4-Butanediol (BDO), Diethylene Glycol (DEG), Shanghai Lingfeng Chemical Co., Ltd.;

[0044] Catalyst CT-2X, Aladdin reagent company...

Embodiment 1

[0052] In a reactor with a vacuum and heating device, mix DS-3 (52.5 parts), PPG-1 (192.5 parts) and GE-2 (105 parts) evenly and dry them under vacuum at 95°C for 2.5h, then cool slowly After cooling down to 60°C, add dried BDO (85.17 parts) and catalyst CT-2X (2.85 parts), mix and stir for 15 minutes, and vacuum degas to obtain component A.

[0053] Control the temperature of component A to 30°C, add 564.83 parts of NCO-B, stir quickly and evenly degas, pour it into a mold with a mold temperature of 70°C, and obtain the non-foaming polyurethane joint for the submarine pipeline field interface of the present invention Material.

[0054] The gel time of the non-foamed polyurethane node material prepared in this example is 5 minutes, and the demoulding time is 18 minutes.

[0055] After testing, the initial tensile strength of the node material prepared in this example is 3.22MPa, the hardness (Shore A) is 70, the tensile strength after post-curing is 18.22MPa, and the elongati...

Embodiment 2

[0057] In a reaction kettle with a vacuum and heating device, mix DS-3 (17.5 parts), PPG-1 (210.0 parts), GE-2 (122.5 parts) evenly and vacuum dry at 95°C for 2.5h, then cool slowly After cooling down to 50°C, add dried BDO (83.70 parts) and catalyst CT-2X (2.85 parts), mix and stir for 15 minutes, and vacuum degas to obtain component A.

[0058] Control the temperature of component A to 30°C, add 566.30 parts of NCO-B, stir quickly and evenly degas, pour it into a mold with a mold temperature of 70°C, and obtain the non-foaming polyurethane joint for the submarine pipeline field interface of the present invention Material.

[0059] The gel time of the non-foamed polyurethane node material prepared in this example is 4 minutes, and the demoulding time is 16 minutes.

[0060] After testing, the initial strength of the node material prepared in this example is 4.13MPa, the hardness (Shore A) is 78, the tensile strength after post-curing is 14.46MPa, and the elongation at break ...

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Abstract

The invention discloses a wet type polyurethane joint material for thermal insulation for a seabed oil and gas pipeline interface. The polyurethane joint material comprises a component A and a component B, wherein the component A comprises polyether polyol, polysiloxane polyhydric alcohol, a chain extender and a catalyst; the component B is modified isocyanate or a derivate of the modified isocyanate; the component B comprises 10 to 30% of NCO (Isocyanate Group) based on mass percent; and the mass ratio of the component A to the component B is 0.25 to 4:1. The wet type polyurethane joint material has the beneficial effects as shown in follows: 1, the adopted catalyst is mercury-free, environment-friendly, long in flowing period and fast to cure in later period; 2, the production cycle is short, a die is at low temperature, and the offshore in-situ casting work can be conveniently carried out; and 3, a product is a silicon-containing material and has relatively low water absorption and is resistant to seawater corrosion.

Description

technical field [0001] The invention relates to a polyurethane node material for wet heat preservation of seabed oil and gas pipeline joints and a preparation method thereof. Background technique [0002] In the exploitation of marine energy, especially oil and natural gas, in order to prevent the formation of natural gas hydrates and petroleum waxes caused by low temperature in the sea from clogging pipelines and causing accidents, oil and gas transmission pipelines must adopt insulation protection layers with a certain thickness. The pipeline is used for transportation, and the protection, insulation and anti-corrosion layers of the main body of such pipelines are prefabricated by special equipment in the factory, and the quality of the protection layer and the insulation and anti-corrosion layer is relatively reliable. Therefore, in the process of offshore laying, the protection and filling of the interface is the key to ensure the safe operation of the submarine pipeline...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/61
Inventor 曹静周巍伟张晓灵沙勇杨加栋李新仲谢彬张杰李丽玮霍娜丽吴文通周长江杜宝银
Owner CHINA NAT OFFSHORE OIL CORP
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