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Preparation method and product of high-temperature anaerobic adhesive

An adhesive, high-performance technology, used in adhesives, non-polymer adhesive additives, adhesive types, etc., can solve the problems of low unsaturated double bond activity, affecting modification efficiency, and declining mechanical properties. The effect of strong comprehensive performance, improved modification efficiency and low cost

Inactive Publication Date: 2017-05-24
杭州得力科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low activity of the unsaturated double bonds in the molecular structure of nitrile rubber, it is difficult or rarely participate in the crosslinking and curing reaction during the rapid crosslinking and curing of the adhesive. Rubber (CTBN) is modified, but it also plays a limited role in the free radical-dominated cross-linking curing reaction, so that most of the liquid nitrile rubber polymers only act as "inert fillers" in the adhesive layer, and cannot be combined with Other acrylate monomers or prepolymers form a three-dimensional network structure, and the polymer system will inevitably appear phase separation phenomenon, which affects the modification efficiency of liquid nitrile rubber to various acrylic adhesives, resulting in a decline in some of its mechanical properties

Method used

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  • Preparation method and product of high-temperature anaerobic adhesive
  • Preparation method and product of high-temperature anaerobic adhesive
  • Preparation method and product of high-temperature anaerobic adhesive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] First, add 300.00 kg of hydroxyl-terminated nitrile rubber (molecular weight 2000-3000, hydroxyl value 0.4-0.5 mmol / g), 315.00 kg of toluene, and 9.85 kg of methacrylic acid into a reaction kettle with a condenser and a water separator. , hydroquinone 158.00g, 37% hydrochloric acid 4.80kg, start the agitator, heat to the reaction system reflux phenomenon, and maintain the reaction at this temperature; when the reaction is until most of the theoretical water output is evaporated, stop heating , to end the reaction, lower the temperature to 55.0°C, vacuum out and recover the solvent toluene, and then discharge the material when the temperature is lowered to below 40°C to obtain methacrylic-terminated nitrile rubber for use.

[0035] Then, prepare the anaerobic adhesive:

[0036] 300.00kg of terminal methacrylic acid-based nitrile rubber prepared above, 290.00kg of E51 epoxy methacrylate, 60.00kg of methacrylic acid, 300.00kg of methyl methacrylate, 0.50kg of 4-tert-butylc...

Embodiment 2

[0039]First, in the reaction kettle with condenser and water trap, add 448.00kg hydroxy-terminated nitrile rubber, 200.00kg benzene, 8.56kg methacrylic acid, p-benzoquinone 66.00g, 37% hydrochloric acid 4.03kg, start the agitator, Heating until reflux occurs in the reaction system, and maintaining the reaction at this temperature; when the reaction reaches the point where most of the theoretical water output is evaporated, stop heating, end the reaction, lower the temperature to 50.0°C, vacuum out and recover the solvent benzene, and then When the temperature is lowered to below 40°C, the material can be discharged to obtain methacrylate-terminated nitrile rubber for later use.

[0040] Then, prepare the anaerobic adhesive:

[0041] 200.00kg of terminal methacrylic acid group nitrile rubber prepared above, polyethylene glycol (400) methacrylate 300.00kg, methacrylic acid 80.00kg, methyl methacrylate 250.00kg, hydroxyethyl methacrylate 50.00kg kg, p-hydroxyanisole 0.10kg, diet...

Embodiment 3

[0044] First, in a reactor with a condenser and a water separator, add 390.00kg of hydroxy-terminated nitrile rubber, 265.00kg of xylene mixed solvent, 10.55kg of methacrylic acid, 190.00g of hydroquinone, 4.88kg of 37% hydrochloric acid, Start the agitator, heat until the reaction system refluxes, and maintain the reaction at this temperature; when the reaction reaches the point where most of the theoretical water output is evaporated, stop heating, end the reaction, lower the temperature to 50.0°C, vacuum out and recover The solvent is xylene, and then the material can be discharged when the temperature is lowered to below 40°C to obtain methacrylic-terminated nitrile rubber for later use.

[0045] Then, prepare the anaerobic adhesive:

[0046] 100.00kg of terminal methacrylic acid group nitrile rubber prepared above, polyethylene glycol (200) methacrylate 300.00kg, methacrylic acid 60.00kg, methyl methacrylate 300.00kg, p-hydroxyanisole 0.10kg , 0.20kg of hydroquinone, 2.0...

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Abstract

The invention discloses a preparation method and a product of a high-temperature anaerobic adhesive. The method comprises the following steps of: firstly, taking a self-made active telechelic polymer, namely end methyl acrylate nitrile butadiene rubber, as a modified elastomer; and compounding a methacrylic acid monomer or prepolymer, a polymerization inhibitor, inorganic filling, a thixotropic agent, an accelerant and an initiator to prepare an acrylic acid series anaerobic adhesive product. The preparation method and the product have the characteristics of convenient raw material source, simple manufacturing process, long storage time, simple and convenient sizing technology, no solvent and environmental friendliness, capability of being rapidly cured at a room temperature, good toughness of an adhesive layer, high adhering strength, good comprehensive performances and the like.

Description

technical field [0001] The invention belongs to the field of room-temperature fast-curing single-component acrylic adhesives, and in particular relates to a preparation method and a product of a high-performance anaerobic adhesive. Background technique [0002] Anaerobic adhesives, also known as anaerobic adhesives and anaerobic adhesives, are one-component room temperature curing adhesives. In 1953, GE Company of the United States first discovered the anaerobic curing properties of diester methacrylate, and then sold acrylic anaerobic adhesives made by Loctite Company of the United States in the mid-1960s. Once the product was released, it was characterized by its simple composition and long storage time. , fast curing at room temperature, simple sizing process, solvent-free and environmental protection, etc. have attracted people's attention, and can be widely used in various fields such as aerospace, transportation, vehicles and ships, machinery and electronics, and chemi...

Claims

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Application Information

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IPC IPC(8): C09J151/04C09J11/04C08C19/28C08C19/38C08F279/02C08F220/32C08F220/06C08F220/14C08F220/28
CPCC09J11/04C09J151/04C08C19/28C08C19/38C08F279/02C08K3/30C08K3/346C08K3/36C08K9/04C08L91/00C08K5/098C08F220/286C08F220/281C08F220/32
Inventor 沈良岑建根王杰
Owner 杭州得力科技股份有限公司
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