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High-temperature-resistant butyl pressure sensitive adhesive and preparation method

A high-temperature-resistant, pressure-sensitive adhesive technology, applied in adhesives, non-polymer adhesive additives, adhesive types, etc., can solve the heat resistance, soil stress and shear resistance of asphalt modified butyl pressure-sensitive adhesives Poor cutting ability, wrinkling and sagging, affecting the anti-corrosion service life of cold-wound tapes, etc., to achieve the effects of improving cohesive strength and soil shear resistance, improving aging resistance, and good heat resistance

Active Publication Date: 2019-10-22
廊坊市中油嘉昱防腐技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, under the influence of heat and other factors, polyethylene cold-wound tape is prone to wrinkle and sag. The heat resistance, soil stress resistance and shear resistance of asphalt-modified butyl pressure-sensitive adhesive are poor, which seriously affects the cold-wrap tape. Anti-corrosion service life

Method used

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  • High-temperature-resistant butyl pressure sensitive adhesive and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A kind of high temperature resistant butyl pressure-sensitive adhesive, its preparation process is as follows:

[0025] 1) In parts by weight, 20 parts of butyl rubber, 10 parts of polyisobutylene with a molecular weight of 70,000 to 100,000 and 39.5 parts of filler are put into a double-roll mill for mixing, and after mixing evenly, a film is produced;

[0026] 2) Add 15 parts of tackifying resin and 5 parts of SEBS into the kneader and stir, and gradually heat to 140-150°C, melt and mix the tackifying resin and SEBS to obtain mixture A;

[0027] 3) Add 10 parts of polyisobutylene with a molecular weight of 30,000 to 60,000 to the mixture A obtained in step 2), and further melt and mix it evenly at 140-150° C. to obtain mixture B;

[0028] 4) To the mixture B obtained in step 3), add the raw rubber sheet kneaded in step 1) and 0.5 parts of antioxidant in turn, stir at 140-150°C for 1 hour and discharge to obtain high temperature resistant butyl pressure sensitive glue...

Embodiment 2

[0031] A kind of high temperature resistant butyl pressure-sensitive adhesive, its preparation process is as follows:

[0032] 1) In parts by weight, 20 parts of butyl rubber, 12 parts of polyisobutylene with a molecular weight of 70,000-100,000 and 25 parts of fillers are put into a double-roll mill for mixing, and after mixing evenly, a film is produced;

[0033] 2) Add 20 parts of tackifying resin and 10 parts of SEBS into the kneader and stir, and gradually heat to 140-150°C, melt and mix the tackifying resin and SEBS to obtain mixture A;

[0034] 3) Add 12 parts of polyisobutylene with a molecular weight of 30,000 to 60,000 to the mixture A obtained in step 2), and further melt and stir at 140-150°C to obtain mixture B;

[0035] 4) To the mixture B obtained in step 3), add the raw rubber sheet kneaded in step 1) and 1 part of antioxidant in turn, stir at 140-150°C for 1 hour and discharge to obtain high temperature resistant butyl pressure sensitive glue.

[0036] Speci...

Embodiment 3

[0038] A kind of high temperature resistant butyl pressure-sensitive adhesive, its preparation process is as follows:

[0039] 1) In parts by weight, 20 parts of butyl rubber, 10 parts of polyisobutylene with a molecular weight of 70,000 to 100,000 and 20 parts of filler are put into a double-roll mill for mixing, and after mixing evenly, a film is produced;

[0040] 2) Add 20 parts of tackifying resin and 15 parts of SEBS into the kneader and stir, and gradually heat to 140-150°C, melt and mix the tackifying resin and SEBS to obtain mixture A;

[0041] 3) Add 13.5 parts of polyisobutylene with a molecular weight of 30,000 to 60,000 to the mixture A obtained in step 2), and further melt, stir and mix evenly at 140-150°C to obtain mixture B;

[0042] 4) To the mixture B obtained in step 3), add the raw rubber sheet kneaded in step 1) and 1.5 parts of antioxidant in turn, stir at 140-150°C for 1 hour and discharge to obtain high temperature resistant butyl pressure sensitive gl...

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Abstract

The application provides a high-temperature-resistant butyl pressure sensitive adhesive and a preparation method, wherein the high-temperature-resistant butyl pressure sensitive adhesive comprises thefollowing raw materials by weight: 20-30% of butyl rubber, 5-15% of SEBS, 10-15% of polyisobutylene with a molecular weight of 70000-100000, 10-15% of polyisobutylene with a molecular weight of 30000-60000, 15-25% of a tackifying resin, 20-40% of a filler, and 0.5-1.5% of an antioxidant. According to the present invention, the high-temperature-resistant butyl pressure sensitive adhesive does notcontain asphalt components, has good heat resistance, and has excellent adhesion under normal temperature and high temperature conditions; by using SEBS with high hard section glass transition temperature and high mechanical property, the shear strength of the butyl pressure sensitive adhesive at a high temperature is improved while the aging resistance and the corrosion resistance of the butyl pressure sensitive adhesive are improved; and the used inorganic filler has reinforcing effect so as to improve the cohesive strength and the soil shear resistance of the butyl pressure sensitive adhesive.

Description

technical field [0001] The present application relates to the technical field of butyl pressure-sensitive adhesives, in particular to a high-temperature-resistant butyl pressure-sensitive adhesive and a preparation method thereof. Background technique [0002] 3PE and heat-shrinkable joint joint structure is the preferred structure for the external anti-corrosion layer of buried steel pipelines in China, and it has been used in China for nearly 20 years. With the passage of time, a considerable part of oil and gas pipelines (including stations) in China have entered the middle-aged and old age, the pipeline anti-corrosion layer has aged and failed, and the failure of the external anti-corrosion layer of buried pipelines has gradually increased. In recent years, many 3PE anti-corrosion layers have been discovered The problem of peeling failure, severe metal substrates and even corrosion have brought hidden dangers to the safe and stable operation of pipeline oil and gas produ...

Claims

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Application Information

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IPC IPC(8): C09J123/22C09J153/02C09J123/20C09J145/00C09J157/02C09J11/04C09J11/06
CPCC09J123/22C09J157/02C09J11/04C09J11/06C08K2003/3045C08L2205/035C08L2201/08C08L2205/025C08L23/22C08L45/00C08L53/025C08L57/02C08K5/1345C08K3/346C08K3/30C08K13/02
Inventor 刘强蔺东顺杨国富吴俊峰于小东
Owner 廊坊市中油嘉昱防腐技术有限公司
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