Wet and dry joint-coating primer for heat shrinkable tape and manufacturing method thereof

A heat-shrinkable tape, wet and dry dual-use technology, applied in coatings, anti-corrosion coatings, epoxy resin coatings, etc. Function is not prominent and other problems, to achieve the effect of excellent storage stability, excellent constructability, excellent corrosion resistance

Active Publication Date: 2011-01-12
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

[0002] At present, the structure of primer + heat-shrinkable tape is mostly used for pipe joint joints. The main function of the primer is to improve the resistance of the heat-shrinkable tape to cathodic disbonding, and its anti-corrosion function is not outstanding; The quality of baking bonding is difficult to guarantee, and the result is that once the shrinkage tape leaks into the water, the steel pipe has no barrier
Moreover, the epoxy primer currently used requires coating the heat shrinkable tape in the dry state of the primer, mainly because the current epoxy primer is based on the reaction activity in the dry state and the hot melt adhesive in the molten state. Reaction, to achieve the effect of fusion bonding, but after hard drying, it cannot produce effective fusion bonding with hot melt adhesive, resulting in unqualified joints

Method used

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  • Wet and dry joint-coating primer for heat shrinkable tape and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The invention discloses a manufacturing method of a heat-shrinkable sealing primer that can be used in both dry and wet conditions. In a stainless steel bucket, add 0.7 parts of bisphenol A epoxy resin, 0.3 parts of novolac epoxy resin, 0.06 parts of long-chain polyamine amide and polar acidic ester sodium salt, 0.015 parts of high molecular weight polycarboxylic acid Amine derivative solution, 0.012 parts of polyether-modified polydimethylsiloxane solution, 0.015 parts of alkyl-aryl modified dimethylsiloxane solution, heated and controlled at 25°C, Mix and stir at high speed, add 0.03 parts of fumed silica powder, 0.005 parts of carbon black, 0.12 parts of precipitated barium sulfate, 0.15 parts of mica powder, and 0.12 parts of talc powder while stirring, and stir at high speed for 0.25h Finally, use a sand mill to grind for 0.5-1h, then add 0.03 parts of γ-aminopropyltriethoxysilane solution, 0.15 parts of glass flakes and 0.04 parts of activated polyamide wax while ...

Embodiment 2

[0019] Add 0.01 part of long-chain polyamine amide and polar acidic ester sodium salt, 0.005 part of derivatization of high molecular weight polycarboxylate amine in 0.5 part of bisphenol A epoxy resin, 0.2 part of novolak epoxy resin by weight solution, 0.005 parts of polyether-modified polydimethylsiloxane solution, and 0.005 parts of alkyl-aryl-modified dimethylsiloxane solution, heated and controlled the temperature at 25 ° C, mixed, Stir at high speed, add 0.01 part of fumed silica powder, 0.002 part of carbon black, 0.05 part of precipitated barium sulfate, 0.05 part of mica powder, 0.05 part of talcum powder under the condition of stirring, stir at high speed for 0.25h and use sand Grind in a mill for 0.5 to 1 hour, then add 0.01 part of γ-aminopropyltriethoxysilane solution, 0.1 part of glass flakes and 0.01 part of activated polyamide wax under stirring, and stir at high speed for 0.25 hours to make the Liquid A in the coating; the modified alicyclic amine is liquid B...

Embodiment 3

[0022]In 0.8 part of bisphenol A epoxy resin, 0.5 part of novolac epoxy resin, add 0.1 part of long-chain polyamine amide and polar acidic ester sodium salt, 0.05 part of derivatization of high molecular weight polycarboxylate amine by weight solution, 0.05 parts of polyether-modified polydimethylsiloxane solution, and 0.05 parts of alkyl-aryl-modified dimethylsiloxane solution, heated and controlled the temperature at 25 ° C, mixed, Stir at high speed, add 0.05 parts of fumed silica powder, 0.006 parts of carbon black, 0.3 parts of precipitated barium sulfate, 0.4 parts of mica powder, 0.2 parts of talc powder under the condition of stirring, stir at high speed for 0.25h and use sand Grind in a mill for 0.5 to 1 hour, then add 0.05 parts of γ-aminopropyltriethoxysilane solution, 0.5 parts of glass flakes and 0.1 part of activated polyamide wax while stirring, and stir at high speed for 0.25 hours to make the Liquid A in the paint; 1 part by weight of modified cycloaliphatic a...

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Abstract

The invention relates to a wet and dry joint-coating primer for a heat shrinkable tape and a manufacturing method thereof. The joint-coating primer comprises a liquid A and a liquid B, wherein the liquid A is prepared from bisphenol A epoxy resin, novolac epoxy resin, long-chain polyamine amide, polar acid ester sodium salt, a high molecular weight amine polycarboxylate derivate solution, a polyether modified dimethyl polysiloxane solution, an alkyl-aryl modified dimethyl siloxane solution, a gamma-amino propyltriethoxysilane solution, carbon black, precipitated barium sulfate, mica powder, talcum powder, gas-phase silicon oxide, glass flake and activated polyamide wax, and the liquid B is prepared from modified alicyclic amine and phenolic aldehyde amine. In use, the liquid A and the liquid B are mixed and cured into a coating which has fine corrosion resistance and high curing speed. Besides, no matter whether the coating is dry or not, the coating has high bonding power up to 100N/cm with the heat shrinkable tape, enables the coated joint to have fine sealability, impermeability and chemical corrosion resistance, has the advantage of convenient on-site construction and ensures the joint-coating quality.

Description

technical field [0001] The present invention relates to a heat-shrinkable sealing primer with excellent corrosion resistance and a high adhesion force between the coating and the heat-shrinkable coating regardless of whether it is dry or not, and a manufacturing method thereof. . technical background [0002] At present, the structure of primer + heat-shrinkable tape is mostly used for pipe joint joints. The main function of the primer is to improve the resistance of the heat-shrinkable tape to cathodic disbonding, and its anti-corrosion function is not outstanding; The quality of baked bonding is difficult to guarantee, and the result is that once the shrinkage tape leaks into the water, the steel pipe has no barrier. Moreover, the epoxy primer currently used requires coating the heat shrinkable tape in the dry state of the primer, mainly because the current epoxy primer is based on the reaction activity in the dry state and the hot melt adhesive in the molten state. reac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/02C09D7/12C09D5/08
Inventor 解蓓蓓李爱贵韩文礼张其滨邵怀启黄桂柏
Owner BC P INC CHINA NAT PETROLEUM CORP
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