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Low-temperature 3PE hot melt adhesive and preparation method thereof

A hot-melt adhesive and low-temperature technology, applied in adhesives, adhesive types, mineral oil hydrocarbon copolymer adhesives, etc., can solve problems such as poor adhesion and sealing, low strength, and high brittleness. Achieve excellent adhesion and sealing, low surface treatment requirements, good low temperature flexibility

Inactive Publication Date: 2015-04-08
JIANGSU DASHENG HEAT SHRINKABLE MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 3PE hot-melt adhesives are widely used in pipeline anticorrosion at home and abroad, but ordinary 3PE hot-melt adhesives have poor low temperature resistance, high brittleness in low temperature environments, easy to break, poor adhesion and sealing, and affect the anti-corrosion effect
[0004] Recently, low-temperature-resistant hot-melt adhesives have also come out, but while paying attention to low-temperature resistance, the bonding strength of hot-melt adhesives is not high, the strength is low at room temperature, and there is almost no strength at high temperatures, losing the protective effect on pipelines

Method used

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  • Low-temperature 3PE hot melt adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A low-temperature 3PE hot melt adhesive, which is composed of the following components by weight percentage:

[0025] EVA 10%

[0026] IIR 10%

[0027] EMH 35%

[0028] EPDM 15%

[0029] Polyisobutylene 5%

[0030] Terpene resin 10%

[0031] Rosin pentaerythritol ester 10%

[0032] Light calcium carbonate 4.5%

[0033] Antioxidant 0.5%

[0034] Wherein the melt index of EVA is 150g / 10min, and wherein by weight percentage, vinyl acetate content 28%;

[0035] IIR weight average molecular weight is 30×10 4 ;

[0036] The melt index of EMH is 50 g / 10min, and wherein by weight percentage, maleic anhydride content is 3%;

[0037] The Mooney viscosity of EPDM is 25 at ML125℃1+4;

[0038] The viscosity-average molecular weight of polyisobutylene is 100,000;

[0039] The softening point of terpene resin is 110°C;

[0040] The softening point of rosin pentaerythritol ester is 105°C;

[0041] The antioxidant is pentaerythritol tetrakis(β-(3,5-di-tert-butyl-4-hydroxyp...

Embodiment 2～6

[0045] They are respectively a kind of 3PE hot-melt adhesive, and its components and dosage are shown in Table 1, and the rest including the preparation and use methods are the same as in Example 1.

[0046] Table 1

[0047]

[0048] The hot melt adhesive composition of each embodiment in Table 1 is calculated by weight percentage.

[0049] In Examples 2-6, the melt index of SBS is 2g / 10min. SEBS melt index is 2.5g / 10min. The softening point of C5 petroleum resin is 100°C.

[0050] It can be seen from Table 1 that the embrittlement temperature of the hot melt adhesives in Examples 1-6 all reaches -50°C, and the peel strength is relatively high in low temperature and high temperature environments, and the performance is stable. cm, good adhesion and sealing performance; 50 ℃, 15N / cm for primer steel, and the other two cases are cohesive and broken when peeled off, which can play a very good role in protecting the pipeline and has excellent anti-corrosion effect.

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Abstract

The invention discloses a low-temperature 3PE hot melt adhesive which comprises the following components in parts by weight: 40-80 parts of an elastomer, 10-30 parts of tackifying resin, 0-15 parts of a plasticizer, 0.2-0.5 part of an antioxygen and 0-15 parts of fillers. The 3PE hot melt adhesive for corrosion prevention has good low-temperature resistance, adhesion performance and sealing performance, also has a certain protective capability at a high temperature and is excellent in corrosion effect. The preparation method of the low-temperature 3PE hot melt adhesive is simple in process and has the advantage of reducing energy consumption and is convenient to popularize.

Description

technical field [0001] The invention relates to a 3PE hot melt adhesive and a preparation method thereof. Background technique [0002] Buried pipeline is one of the important facilities of ground engineering as the transmission carrier of medium. It is the link connecting upstream resources and downstream users. Since the pipeline has been buried underground for a long time, as time goes by, affected by factors such as external soil characteristics and topographical settlement, the pipeline will corrode, perforate, and leak, which will bring huge damage to the country. Economic losses, and at the same time will bring serious pollution to the environment. With the country's investment and construction of large and medium-sized long-distance pipelines and urban pipeline networks for residents' daily life, anti-corrosion measures for steel pipelines and ancillary facilities have also become an important research field. 3PE hot melt adhesive is an important part of various an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J123/08C09J153/02C09J123/22C09J123/16C09J145/00C09J157/02C09J193/04C09J123/20C09J11/04C09J11/06F16L58/10
Inventor 杨军伟韦良邹存洋
Owner JIANGSU DASHENG HEAT SHRINKABLE MATERIALS
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