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Compositions for protecting objects from corrosion

一种组合物、物品的技术，应用在包括金属,金属合金,金属组合物和/或混凝土的物品领域，能够解决有限可加工性等问题

Active Publication Date: 2020-09-08
FRANS NOOREN AFDICHTINGSSYSTN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compositions according to US 5.898.044, US 7.608.343 and US 2010 / 0051199 have the disadvantage that they are viscous at ambient temperature and thus have limited handleability
Additionally, they are viscous materials and thus have limited processability

Method used

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  • Compositions for protecting objects from corrosion
  • Compositions for protecting objects from corrosion
  • Compositions for protecting objects from corrosion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0147] A filler-free mixture was prepared by mixing polyisobutene (Oppanol B10 from BASF), hydrocarbon wax (microcrystalline wax MMP from Shell) and optional antioxidant at high temperature (about 140°C). The composition is shown in Table 1.

[0148] Table 1

[0149]

[0150]

[0151] Oppanol B10 has an M of 40000 v , Staudinger index J 0 =27.5-31.2cm 3 / g, M w =36000, molar mass distribution=3.0, dynamic viscosity at 150°C=40,000, glass transition temperature T g = -65°C (BASF brochure, January 2009 " Type B" (B10 to B15); incorporated by reference).

[0152] According to ASTM D 938 (Product Data Sheet, November 2009; incorporated by reference), Microcrystalline Wax MMP has a freezing point of 70-76°C.

[0153] All mixtures were non-tacky at ambient temperature. All mixtures adhered very well to stainless steel surfaces over a temperature range of -20°C to 65°C. The adhesion strength is similar to that of pure polyisobutylene. All mixtures were still handleab...

Embodiment 2

[0156] The mixture with filler (quartz sand) was prepared by mixing polyisobutylene (Oppanol B10 from BASF), hydrocarbon wax (microcrystalline wax MMP from Shell) and optional antioxidant and high temperature (about 135°C). Compositions are shown in Table 2.

[0157] Table 2

[0158]

[0159]

[0160] All mixtures were non-tacky at ambient temperature. All mixtures adhered very well to stainless steel surfaces over a temperature range of -20°C to 65°C. The adhesion strength is similar to that of pure polyisobutylene. All mixtures were still handleable at -48°C.

[0161] Mixes No. 4 and No. 5 can be treated by spraying at about 55°C.

Embodiment 3

[0163] Cathodic disbondment test

[0164] The cathodic disbondment test is a well known and generally accepted laboratory test for pipeline coatings (see e.g. www.nace.org and E. Broesder, "Coatings and Cathodic Disbondment - The True Story" )”, full paper presented at CEOCOR Annual Meeting, Lucerne (Switzerland), May 2012)).

[0165] In this test, an artificial defect is created in the coating up to the bare steel of the pipeline (the diameter of the defect depends on the standard used). Bare steel in damage is brought into contact with the electrolyte by attaching a battery containing the electrolyte to the defect. An inert counter electrode (anode) and reference electrode are also immersed in the electrolyte. Connect the test sample and counter electrode to a power source. Turn on the power and adjust until the potential measured between the reference electrode and the test sample reaches the desired value. The applied potential must be frequently adjusted, and the curr...

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Abstract

The present invention relates to a composition for protecting an article from corrosion, wherein the composition comprises a blend comprising from about 50 wt.% to about 99 wt.% of an amorphous polymer based on the total weight of the blend and about 1 wt.% to about 50 wt.% of hydrocarbon wax, the composition comprising at least 30 wt.% of said blend based on the total weight of the composition, wherein the amorphous polymer has a glass of less than about -20°C Transformation temperature T g and the hydrocarbon wax has a melting point of from about 35°C to about 130°C. The invention also relates to wrapping tapes comprising a backing layer and a layer comprising the composition.

Description

technical field [0001] The present invention relates to compositions comprising amorphous polymers and waxes and their use to protect objects from corrosion, in particular objects comprising metals, metal alloys, metal compositions and / or concrete. These compositions are particularly useful for sealing and insulating items that come into contact with salt, moisture, water and other corrosive substances. Formed articles can be selected from oil lines, oil pipes, gas lines, gas pipes, man hole covers, tanks, welded joints, flanges , crane hooks, thermite welding and T-joints. Items can be located underground or above ground. Where appropriate, the composition can be applied to the exterior or interior surfaces of the article. Background technique [0002] Compositions based on amorphous polymers for protecting objects from corrosion are known in the art. [0003] US 5.898.044, incorporated by reference, discloses a composition comprising a filler and having a glass transit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D123/22C09D7/61C09D7/63C09D7/65
CPCC09D123/22C08L91/06C09D7/61C09D7/63C09D7/65C09J7/20C09D5/08C09D5/20C09J9/00C09J11/04C09J11/06C09J11/08C09J123/22C09J2423/00C09J2491/00
Inventor 简·弗雷德里克·多德玛雅各布斯·约翰内斯·艾贝林
Owner FRANS NOOREN AFDICHTINGSSYSTN
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