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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

A technology of oil and gas pipelines and polyurethane, which is applied in the field of polyurethane node materials and its preparation, which can solve the problems of less than 100% closed cell rate, high water absorption rate of materials, and low compressive strength, and achieve low water absorption rate and low mold temperature , the effect of long flow period

Active Publication Date: 2015-05-20
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 on 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 40-50mgKOH / 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;

[0045] NCO-B, m...

Embodiment 1

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

[0053] Control the temperature of component A to 30°C, add 564.83 parts of NCO-B, quickly stir and evenly degas, and pour it into a mold with a mold temperature of 70°C to obtain the non-foamed polyurethane node 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 embodiment is 5 minutes, and the demolding time is 18 minutes.

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

Embodiment 2

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

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

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

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

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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 insulation of a submarine oil and gas pipeline interface 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 the low temperature under the sea and block the pipelines, causing accidents, oil and gas transportation pipelines must be equipped with a certain thickness of insulation and protection layer. The pipeline is used for transportation, and the protection, insulation and anticorrosion layer of the main body of this kind of pipeline are prefabricated by special equipment in the factory, and the quality of the protection layer and insulation and anticorrosion layer is relatively reliable. Therefore, the protection and filling of interfaces is the key to ensuring the safe operation of submarine pipelines during the laying p...

Claims

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Application Information

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Patent Type & Authority Patents(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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