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A kind of anaerobic adhesive for sealing plastic parts and preparation method thereof

A technology for anaerobic adhesives and plastic parts, applied in the field of anaerobic adhesives, which can solve the problems of affecting the sealing effect, low cohesive strength, plastic deformation, etc., and achieve the effects of reducing uneven force, reducing stress, and large torque

Active Publication Date: 2019-12-20
山东禹王和天下新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the anaerobic adhesive will shrink during the transition from liquid to solid when it is cured, stress concentration will occur when the shrinkage is uneven, and when the stress exceeds the cohesive strength of the plastic, it will crack the plastic and affect the sealing effect
The cohesive strength of metal is relatively high, and the stress concentration generated during the curing process is not enough to exceed its cohesive strength, but the cohesive strength of some plastics (such as PVC, ABS and PC, etc.) is low. When the stress exceeds its cohesive strength, The plastic will be deformed or even cracked, which will affect the sealing effect

Method used

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  • A kind of anaerobic adhesive for sealing plastic parts and preparation method thereof
  • A kind of anaerobic adhesive for sealing plastic parts and preparation method thereof
  • A kind of anaerobic adhesive for sealing plastic parts and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0039] A kind of anaerobic glue that is used for plastic parts sealing, the proportion by weight of this anaerobic glue component is as shown in table 1 below:

[0040] Table 1

[0041] Example 1 Example 2 Example 3 raw material name parts by weight parts by weight parts by weight polyurethane methacrylate 48 48 48 1,4-Butanediol dimethacrylate 35 30 25 poly(1,2-propylene glycol adipate) 10 15 20 Acetyl phenylhydrazine 1.0 1.0 1.0 ascorbic acid 0.6 0.6 0.6 Hollow glass beads 3 3 3 Cumene Hydroperoxide 2.1 2.1 2.1 Tetrasodium EDTA 0.25 0.25 0.25 p-benzoquinone 0.05 0.05 0.05

[0042] Preparation:

[0043] (1), add polyurethane methacrylate, 1,4-butanediol dimethacrylate, poly-1,2-propylene glycol adipate and tetrasodium ethylenediaminetetraacetic acid into the reaction flask according to the proportion, Stirring at 20-40°C for 1.5 hours to prepare a mixed solution;

[0044] (...

experiment example

[0060] Performance Testing:

[0061] 1. Stability: Put the one-component anaerobic adhesive in a 5ml glass test tube and place it in a water bath at 82°C for 2 hours. If it does not gel, it can be stored at room temperature for 2 years;

[0062] 2. Positioning time: use two Rp3 / 4 and Rp with lengths of 0.112 meters 1 3 / 4 ABS pipe, Rp3 / 4 pipe thread coated with anaerobic adhesive, and then R 1 3 / 4 is put on, record the positioning time from when the pipe is put on to when the two pipes cannot be twisted;

[0063] 3. Air tightness test: According to the standard BS EN 1054 1996, use the above-mentioned ABS pipe, fix it with anaerobic glue and place it for two days to test the air tightness of the interface;

[0064] 4. Stress resistance test: Use the above-mentioned ABS pipe, fix it with anaerobic adhesive, and record the stress failure phenomenon at the interface of each anaerobic adhesive after 3 days.

[0065] Test the stability, positioning time, air tightness, and stress r...

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Abstract

The invention relates to an anaerobic adhesive used for sealing plastic members, and a preparation method thereof. The anaerobic adhesive comprises polyurethane methacrylate, a methacrylate monomer, a plasticizer, a promoter, a promoter aid, a strengthening agent, an initiator, a polymerization inhibitor and a chelating agent. The anaerobic adhesive used for sealing plastic members has the advantages of very good sealing effect, fast positioning time, no stress damages to the plastic members, and good stability, and can be preserved at normal temperature for at least two years.

Description

technical field [0001] The invention relates to an anaerobic adhesive for industrial use, in particular to an anaerobic adhesive for sealing plastic parts and a preparation method thereof. Background technique [0002] Anaerobic adhesives are widely used in metal thread locking, metal pipe sealing, metal cylinder holding, metal plane sealing and metal plane bonding, etc. US03988299 etc. all have introduction. But for the bonding of plastic parts, mainly the sealing of plastic parts, anaerobic adhesives are generally not used. Because the anaerobic adhesive will shrink during the transition from liquid to solid when it is cured, stress concentration will occur when the shrinkage is uneven, and when the stress exceeds the cohesive strength of the plastic, it will crack the plastic and affect the sealing effect. The cohesive strength of metal is relatively high, and the stress concentration generated during the curing process is not enough to exceed its cohesive strength, but...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J175/14C09J11/04C09J11/06C09J11/08
CPCC09J11/04C09J11/06C09J11/08C09J175/14C08L71/00C08K13/04C08K7/28
Inventor 甄广亮
Owner 山东禹王和天下新材料有限公司
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