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Low-temperature 3PE dry film hot melt adhesive for pipeline joint coating and corrosion prevention and preparation method of low-temperature 3PE dry film hot melt adhesive

A low-temperature, hot-melt adhesive technology, used in adhesives, adhesive types, grafted polymer adhesives, etc. Good, affect the anti-corrosion effect and other issues, to achieve the effect of ensuring uniform thickness and integrity, excellent bonding effect, excellent adhesion and sealing

Inactive Publication Date: 2019-07-19
江苏达胜热缩防护用品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

3PE wet film construction hot melt adhesive used to be the main hot melt adhesive for pipeline joint anticorrosion heat shrinkable tape, but the wet film construction method has certain technical weaknesses and cannot guarantee the uniform thickness and integrity of the epoxy coating
[0004] The application of 3PE dry film hot melt adhesives in the field of pipeline anticorrosion joints has received more and more attention and application. However, ordinary 3PE dry film hot melt adhesives have poor low temperature resistance and are brittle and easy to break in low temperature environments. Poor sealing, affecting anti-corrosion effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A low-temperature type 3PE dry film hot melt adhesive for pipeline joint anticorrosion, which is prepared from the following raw material components:

[0027] IIR 30%

[0028] EPDM 15%

[0029] EVA-g-MAH 10%

[0030] EMH 15%

[0031] Terpene resin 10%

[0032] Rosin Glycerides 10%

[0033] Polyisobutylene 5%

[0034] Antioxidant 0.5%

[0035] Light calcium carbonate 4.5%.

[0036] Both IIR and EPDM are rubber-like elastomers with good toughness and certain elasticity at low temperature; among them: IIR is butyl rubber, and its weight average molecular weight is 300,000; EPDM is EPDM rubber, and its Mooney viscosity is ML125℃1 +4 is 25.

[0037] Both EVA-g-MAH and EMH are bonding resins, which are used to increase the bonding strength of hot melt adhesives to polar materials; among them: EVA-g-MAH is the maleic anhydride grafted modified material of ethylene-vinyl acetate , under the conditions of 190°C and 2.16kg, the melt index is 25g / 10min, the content of vin...

Embodiment 2

[0049] A low-temperature type 3PE dry film hot melt adhesive for pipeline joint anticorrosion, which is prepared from the following raw material components:

[0050] IIR 25%

[0051]EPDM 15%

[0052] EMH 30%

[0053] Terpene resin 10%

[0054] C5 petroleum resin 5%

[0055] Glycerides of Rosin 5%

[0056] Polyisobutylene 5%

[0057] Antioxidant 0.2%

[0058] Light calcium carbonate 4.8%.

[0059] Both IIR and EPDM are rubber-like elastomers with good toughness and certain elasticity at low temperature; among them: IIR is butyl rubber, and its weight average molecular weight is 250,000; EPDM is EPDM rubber, and its Mooney viscosity is ML125℃1 +4 is 60.

[0060] EMH is a bonding resin, which is used to increase the bonding strength of hot melt adhesives to polar materials; EMH is ethylene-acrylate-maleic anhydride terpolymer, and its melt index is 190°C and 2.16kg. 100 g / 10min, maleic anhydride content is 5wt%.

[0061] Terpene resin, C5 petroleum resin, and rosin glyc...

Embodiment 3

[0072] A low-temperature type 3PE dry film hot melt adhesive for pipeline joint anticorrosion, which is prepared from the following raw material components:

[0073] SIS 10%

[0074] SEBS 5%

[0075] EPDM 15%

[0076] EVA-g-MAH 15%

[0077] EMH 20%

[0078] C5 petroleum resin 10%

[0079] Rosin Glycerides 14%

[0080] Naphthenic oil 5%

[0081] Antioxidant 0.3%

[0082] Light calcium carbonate 5.7%.

[0083] SIS, SEBS, and EPDM are all rubber-like elastomers with good toughness and certain elasticity at low temperatures; among them: SIS is styrene-isoprene-styrene block copolymer, which can be used at 190°C and 2.16kg The melt index is 2g / 10min; SEBS is styrene-ethylene-butylene-styrene block copolymer, which has a melt index of 5g / 10min under the conditions of 190°C and 2.16kg; EPDM is ethylene-propylene-diene Rubber, its Mooney viscosity ML125 ℃ 1+4 is 35.

[0084] Both EVA-g-MAH and EMH are bonding resins, which are used to increase the bonding strength of hot mel...

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Abstract

The invention relates to a low-temperature 3PE dry film hot melt adhesive for pipeline joint coating and corrosion prevention. The low-temperature 3PE dry film hot melt adhesive is prepared by kneading a rubber elastomer, bonding resin, tackifying resin, a plasticizer, an antioxidant and a filler and conducting extruding, wherein the rubber elastomer is two or more of a styrene-isoprene-styrene block copolymer, a styrene-ethylene-butene-styrene block copolymer, butyl rubber and ethylene propylene diene monomer; the bonding resin is one or two of an ethylene-vinyl acetate maleic anhydride grafted modified material and an ethylene-acrylate-maleic anhydride terpolymer; the tackifying resin is one or more of terpene resin, C5 petroleum resin and rosin glyceride; and the plasticizer is polyisobutene or naphthenic oil. The low-temperature dry film hot melt adhesive disclosed by the invention is used for pipeline joint coating and corrosion prevention, meets the construction requirements in an extremely cold environment, and meets the pipeline joint coating and corrosion prevention construction requirements in cold regions; and the adhesive has the advantages of excellent adhesion and sealing property, good low-temperature flexibility, higher peel strength and stable performance.

Description

technical field [0001] The invention relates to the field of dry-film hot-melt adhesives, in particular to a low-temperature 3PE dry-film hot-melt adhesive for pipe joint anticorrosion and a preparation method thereof. Background technique [0002] As the transmission carrier of the medium, the buried pipeline is one of the important facilities of the surface engineering, and it is the link connecting the upstream resources and the downstream users. Since the pipeline has been buried underground for a long time, with the passage of time, affected by factors such as external soil characteristics and topographical settlement, the pipeline, especially the pipeline interface, will be corroded, perforated, and leaked, which will bring huge economic losses to the country. Bring serious pollution to the environment. With the country's investment in and construction of large and medium-sized long-distance pipelines and urban pipeline networks used by residents, anti-corrosion measu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J123/22C09J123/16C09J151/06C09J127/06C09J145/00C09J193/04C09J11/04C09J11/08C09J11/06
CPCC08K2003/265C08L2205/035C09J11/04C09J11/06C09J11/08C09J123/22C08L23/16C08L51/06C08L27/06C08L45/00C08L93/04C08K5/1345C08K3/26
Inventor 杨军伟韦良张志强张徐文於维伟
Owner 江苏达胜热缩防护用品有限公司
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