Pipeline repaired mouth anti-corrosive primer coating having high adhesive bonding ability with thermal contraction belt

An anti-corrosion primer and heat-shrinking technology, used in anti-corrosion coatings, pipeline anti-corrosion/anti-rust protection, pipeline protection, etc., can solve problems such as corrosion, easy leakage and water penetration, and achieve good storage stability, construction conditions, and curing. fast effect

Active Publication Date: 2008-12-24
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can overcome the corrosion problem caused by the leakage and water penetration of the existing pipeline filling technology

Method used

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  • Pipeline repaired mouth anti-corrosive primer coating having high adhesive bonding ability with thermal contraction belt
  • Pipeline repaired mouth anti-corrosive primer coating having high adhesive bonding ability with thermal contraction belt
  • Pipeline repaired mouth anti-corrosive primer coating having high adhesive bonding ability with thermal contraction belt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1: the preparation process of the pipeline joint anticorrosion primer coating with high bonding capacity with heat shrinkage:

[0016] ①Preparation of polyurethane modified epoxy resin: In a stainless steel reaction kettle, add 1 weight part of polyether polyol, heat to 80°C under stirring, add 0.0005 weight part of dibutyltin dilaurate, dropwise add 0.25 weight part of Isocyanate MDI-50, after reacting for 2 hours, add 2.1 parts by weight of bisphenol A epoxy resin in batches, continue stirring for 4 hours, stop stirring, and discharge to obtain polyurethane modified epoxy resin. The hydroxyl value of polyether polyol is 56, the functional group is 3, and the molecular weight is 5000.

[0017] ②Preparation of agent A: In a stainless steel bucket, add 1 part by weight of polyurethane modified epoxy resin, 0.15 parts by weight of neopentyl glycol diglycidyl ether, and 0.10 parts of polycarboxylic acid polymer (TEGO 610S ), 0.01 part of acrylate polymer (BYK-1...

Embodiment 2

[0023] ①Preparation of polyurethane-modified epoxy resin: In a stainless steel reaction kettle, add 1 weight part of polyether polyol, heat to 80°C under stirring, drop 0.25 weight part of isocyanate MDI-50, add in batches after 4 hours of reaction 2.8 parts by weight of bisphenol F-type epoxy resin, continue to stir for 6 hours, stop stirring, and discharge to obtain polyurethane modified epoxy resin. The hydroxyl value of polyether polyol is between 50, the functional group is between 4, and the molecular weight is about 4000.

[0024] ②Preparation of Agent A: In a stainless steel bucket, add various components in sequence according to the component ratio of Example 1, stir at high speed for 0.25h, grind with a sand mill for 0.5h, and discharge to obtain Agent A in the coating;

[0025] ③Preparation of Agent B: Add 1 part by weight of modified alicyclic amine and 0.01 part by weight of polyamide wax in a stainless steel tank in sequence, and stir at high speed for 0.5 h to o...

Embodiment 3

[0030] ①Preparation of polyurethane modified epoxy resin: In a stainless steel reaction kettle, add 1 weight part of polyether polyol, heat to 80°C under stirring, add 0.0005 weight part of dibutyltin dilaurate, dropwise add 0.25 weight part of Isocyanate MDI-50, after reacting for 2 hours, add 2.1 parts by weight of bisphenol AD ​​epoxy resin in batches, continue stirring for 4 hours, stop stirring, and discharge to obtain polyurethane modified epoxy resin.

[0031] ② Preparation of Agent A: In a stainless steel bucket, add 1 part by weight of polyurethane modified epoxy resin, 0.20 part by weight of 2-diol diglycidyl ether, and 0.05 part of polycarboxylic acid polymer (TEGO 610S ), 0.01 part of acrylate polymer (BYK-110), 0.01 part of polysiloxane (BYK-080), 0.02 part of polyether siloxane copolymer (BYK-330), 0.015 part of urethane Ester polymer (TEGO 710), control the temperature at 30°C, mix and stir at high speed, add 0.02 parts by weight of fumed silica, 0.24 parts by w...

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Abstract

Pipeline joint coating anticorrosion primer paint with high adhesive bonding capability to a thermal contraction belt is applied to the pipeline paint technical field. The primer paint consists of an agent A and an agent B, wherein the agent A comprises the following compositions of polyurethane modified epoxy resin, neopentylene glycol diglycid ether, a polyocarboxy acid polymer, an acrylic ester polymer, a polysiloxane, a polyether siloxane copolymer, a carbamate polymer, a gas phase silicone dioxide, precipitated barium sulphate, mica powder, quartz powder and chromium oxide green, and the agent B comprises the following compositions of modified aliphatic ring amine and polyamide wax. The primer paint has the advantages that: the primer paint has higher adhesive bonding capacity to the thermal contraction belt with one-shot paint film thickness of more than 200 mu m and high curing speed, thereby greatly shortening a construction cycle. The paint film meets the joint coating anticorrosion requirements with resistance to corrosion. The primer paint is safe and environmentally friendly without a solvent and with good storage stability.

Description

technical field [0001] The invention relates to the technical field of pipeline coatings, in particular to a solvent-free epoxy polyurethane coating for pipeline jointing with good adhesion performance to heat shrinkage and corrosion resistance. Background technique [0002] During the use of long-distance pipelines with external anti-corrosion coatings, it is found that the joints are the most prone to problems. For the primer + heat-shrinkable tape structure of long-distance pipeline joints, the main function of the primer is to bond the heat-shrinkable tape and improve the resistance to cathodic stripping of the heat-shrinkable tape. Generally, it does not have anti-corrosion function or poor anti-corrosion function. , If the shrinkage belt leaks into water, the epoxy primer is easy to foam and fall off, and the steel pipe will corrode. The main reason for the above-mentioned water seepage corrosion is that the sealing primer currently used requires coating the heat shri...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D5/12F16L58/04C09D167/00C09D133/08C09D183/12
Inventor 邵怀启解蓓蓓徐忠苹韩文礼张其滨
Owner BC P INC CHINA NAT PETROLEUM CORP
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