A low-odor acrylate adhesive for spirit level bonding and its preparation method

Abstract

The present invention discloses a low-odor acrylate adhesive for spirit level bonding, which consists of two components A and B. The raw materials of component A include the following parts by weight: monofunctional acrylate monomer 40% - 65%; bifunctional acrylate monomer 1% - 10%; impact-resistant core-shell resin 15% - 30%; elastomer 5% - 15%; initiator 1 - 5%; stabilizer 0.1 - 1%; coupling agent 0.1 - 2%; volatility inhibitor 0.3 - 1%. The raw materials of component B include the following parts by weight: monofunctional acrylate monomer 40% - 65%; bifunctional acrylate monomer 1% - 10%; impact-resistant core-shell resin 15% - 30%; elastomer 5% - 15%; adhesion promoter 1% - 3%; reducing agent 0.1 - 1%; stabilizer 0.1 - 1%; accelerator 0.01 - 1%; volatility inhibitor 0.3 - 3%. The two components A and B are mixed evenly according to a volume ratio of 1:1. The acrylate structural adhesive prepared by the present invention has the characteristics of low odor, environmental friendliness, good low-temperature impact resistance, etc., and has good peel strength and shear strength for plastics and metals.

Description

Technical Field

[0001] The present invention relates to the technical field of two-component acrylate structural adhesives, and particularly relates to a low-odor acrylate adhesive for bonding spirit levels and a preparation method thereof. Background Art

[0002] Two-component acrylate adhesives are widely used in structural bonding in various industries due to their characteristics such as rapid curing at room temperature, high strength, good toughness, and simple process. With the improvement of environmental protection requirements, many factory workers require the use of acrylate structural adhesives that do not contain strong pungent odors (such as methyl methacrylate).

[0003] Instant adhesives have excellent rapid positioning performance, but usually have poor heat resistance, moisture resistance, low peel strength and impact strength, especially almost no impact strength in low-temperature environments.

[0004] Two-component epoxy adhesives have high-temperature resistance and aging resistance characteristics and have strong bonding strength to metals, but their bonding performance to plastics is slightly poor, and their impact resistance is insufficient in low-temperature environments.

[0005] The ambient temperature for using spirit levels is generally -25°C to 85°C. Therefore, the adhesive should have high low-temperature impact resistance and moisture and heat aging resistance, and high bonding strength to plastics and metals.

[0006] At present, most of the bonding of spirit levels uses instant adhesives and two-component epoxy structural adhesives for bonding, and a small part uses acrylate adhesives containing strong pungent monomers for bonding. However, using the above types of adhesives will have some disadvantages and cannot fully meet the usage requirements of spirit levels. Summary of the Invention

[0007] In order to overcome the above-mentioned defects of the prior art, one of the purposes of the present invention is to provide a low-odor acrylate adhesive for bonding spirit levels, which can solve the problems of the existing adhesives being unfriendly to the environment, having poor low-temperature impact resistance, and poor bonding strength to plastics.

[0008] Another purpose of the present invention is to provide a preparation method of a low-odor acrylate adhesive for bonding spirit levels.

[0009] To achieve one of the purposes of the present invention, the technical solution adopted is as follows:

[0010] A low-odor acrylate adhesive for bonding spirit levels is composed of two components, A and B. The raw materials of component A include the following parts by weight:

[0011] Mono-functional acrylate monomer 40% - 65%;

[0012] Di-functional acrylate monomer 1% - 10%;

[0013] Impact-resistant core-shell resin: 15% - 30%;

[0014] Elastomer: 5% - 15%;

[0015] Initiator: 1% - 5%;

[0016] Stabilizer: 0.1% - 1%;

[0017] Coupling agent: 0.1% - 2%;

[0018] Volatile inhibitor: 0.3% - 1%,

[0019] The raw material composition of component B includes the following parts by weight:

[0020] Mono-functional acrylate monomer: 40% - 65%;

[0021] Bi-functional acrylate monomer: 1% - 10%;

[0022] Impact-resistant core-shell resin: 15% - 30%;

[0023] Elastomer: 5% - 15%;

[0024] Adhesion promoter: 1% - 3%;

[0025] Reducing agent: 0.1% - 1%;

[0026] Stabilizer: 0.1% - 1%;

[0027] Accelerator: 0.01% - 1%;

[0028] Volatile inhibitor: 0.3% - 3%;

[0029] The two components A and B are mixed evenly at a volume ratio of 1:1.

[0030] In a preferred embodiment of the present invention, the mono-functional acrylate monomer is any one or a mixture of two or more of 2-hydroxyethyl methacrylate, 2-hydroxypropyl methacrylate, tetrahydrofurfuryl methacrylate, phenoxyethyl methacrylate, isobornyl methacrylate, lauryl methacrylate, methoxypolyethylene glycol monomethacrylate, isooctyl methacrylate, 4-hydroxybutyl methacrylate, stearyl methacrylate, cetyl methacrylate.

[0031] In a preferred embodiment of the present invention, the bi-functional acrylate monomer is any one or a mixture of two or more of polyethylene glycol dimethacrylate, 1,3-butanediol dimethacrylate, ethoxylated bisphenol A dimethacrylate, triethylene glycol dimethacrylate.

[0032] In a preferred embodiment of the present invention, the impact-resistant core-shell resin is MBS resin, preferably MBS resin grades B564 and M511 produced by Kaneka Chemical, and MBS resin grade BTA753 produced by Rohm and Haas.

[0033] In a preferred embodiment of the present invention, the elastomer is any one or a mixture of two or more of nitrile rubber, chlorosulfonated polyethylene, ABS resin, SBS resin, BS resin, and polybutadiene rubber.

[0034] In a preferred embodiment of the present invention, the initiator is any one or a mixture of two or more of tert-butyl peroxyisononanoate, benzoyl peroxide, cumene hydroperoxide, di-tert-butyl peroxide, and dilauroyl peroxide.

[0035] In a preferred embodiment of the present invention, the stabilizer is any one or a mixture of two or more of hydroquinone, benzoquinone, 2,6-di-tert-butyl-p-cresol, 1,4-naphthoquinone, oxalic acid, and sodium salt.

[0036] In a preferred embodiment of the present invention, the coupling agent is any one or a mixture of two or more of γ-aminopropyltriethoxysilane, γ-(2,3-epoxypropoxy)propyltrimethoxysilane, γ-methacryloxypropyltrimethoxysilane, vinyltriethoxysilane, γ-mercaptopropyltrimethylsilane, and vinyltris(2-methoxyethoxy)silane.

[0037] In a preferred embodiment of the present invention, the volatilization inhibitor is paraffin wax.

[0038] In a preferred embodiment of the present invention, the reducing agent is a transition metal salt. Preferably, it is any one or a mixture of two or more of vanadyl acetylacetonate, vanadium acetylacetonate, copper acetylacetonate, and aluminum acetylacetonate.

[0039] In a preferred embodiment of the present invention, the promoter is any one or a mixture of two or more of cobalt isooctanoate, copper isooctanoate, manganese isooctanoate, and copper naphthenate.

[0040] In a preferred embodiment of the present invention, the adhesion promoter is one or a mixture of methacryloxyethyl phosphate and 2-hydroxyethyl methacrylate phosphate.

[0041] To achieve the second object of the present invention, the technical solution adopted is a preparation method of a low-odor acrylate adhesive for spirit level bonding, and the method includes the following steps:

[0042] Preparation of Component A: Put the monofunctional acrylate monomer, difunctional acrylate monomer, impact-resistant resin, elastomer, volatility inhibitor, and stabilizer into the reaction kettle, and stir until the impact-resistant resin and elastomer are completely dissolved; then put the initiator and coupling agent into the reaction kettle and stir for 1 - 2 hours until evenly mixed, and remove the bubbles under vacuum to obtain Component A;

[0043] Preparation of Component B: Put the monofunctional acrylate monomer, difunctional acrylate monomer, impact-resistant resin, elastomer, volatility inhibitor, and stabilizer into the reaction kettle, and stir until the impact-resistant resin and elastomer are completely dissolved; then put the adhesion promoter, reducing agent, and accelerator into the reaction kettle and stir for 1 - 3 hours until evenly mixed, and remove the bubbles under vacuum to obtain Component B;

[0044] Mix Component A and Component B evenly according to the volume ratio of 1:1 and apply the glue.

[0045] The beneficial effects of the present invention are as follows:

[0046] The acrylate structural adhesive prepared by the present invention is a low-odor acrylate adhesive for the bonding of spirit levels, with the characteristics of low odor, environmental friendliness, good low-temperature impact resistance, etc., and has good peel strength and shear strength for plastics and metals. Specific Embodiments

[0047] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments.

[0048] Example 1 and Comparative Example:

[0049] Example 1 and the comparative example are specifically shown in Table 1:

[0050] Table 1

[0051]

[0052]

[0053] Preparation Process:

[0054] Preparation of Component A: Put tetrahydrofuran methyl acrylate, hydroxypropyl methacrylate, hydroxyethyl methacrylate, ethoxylated bisphenol A dimethacrylate, B564, SBS, polybutadiene rubber, paraffin, hydroquinone, and oxalic acid into the reaction kettle, and stir until B564 and SBS are completely dissolved; then put cumene hydroperoxide and KH560 into the reaction kettle and stir for 1 - 2 hours until evenly mixed, and remove the bubbles under vacuum to obtain Component A;

[0055] Preparation of Component B: Tetrahydrofurfuryl methacrylate, hydroxypropyl methacrylate, hydroxyethyl methacrylate, ethoxylated bisphenol A dimethacrylate, B564, SBS, polybutadiene rubber, paraffin, hydroquinone, and oxalic acid were put into a reaction kettle and stirred until B564 and SBS were completely dissolved; then vanadyl acetylacetonate, copper naphthenate, and 2-hydroxyethyl methacrylate phosphate were added to the reaction kettle and stirred until evenly mixed, and the bubbles were removed under vacuum to obtain Component B.

[0056] The Component A and Component B were proportioned for glue coating according to a volume ratio of 1:1.

[0057] Example 2:

[0058] Example 2 is specifically shown in Table 2:

[0059] Table 2

[0060]

[0061]

[0062] The preparation process was the same as that of Example 1.

[0063] Example 3

[0064] Example 3 is specifically shown in Table 3:

[0065] Table 3

[0066]

[0067]

[0068] The preparation process was the same as that of Example 1.

[0069] Performance test:

[0070] The impact strength of the adhesive was tested according to GB / T 6328-1999, the peel strength of the adhesive was tested according to GB / T 2791-1995, the butt tensile strength of the adhesive was tested according to GB / T 6329-1996, and the shear strength of the adhesive was tested according to GB / T 7124-2008. The specific performance results are shown in Table 4:

[0071] Table 4

[0072]

[0073]

[0074] As can be seen from Table 4, the impact strength (KJ / m2), impact strength at -30°C (KJ / m2), butt tensile strength (MPa), shear strength (MPa), and peel strength (N / mm) of Examples 1-3 have all been improved well.

[0075] In the above specific embodiments, the purpose, technical solution, and beneficial effects of the present invention have been further described in detail. However, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A low-odor acrylate adhesive for bonding spirit levels, characterized in that, It consists of two components, A and B. The raw materials of component A include the following parts by weight: Mono-functional acrylate monomer: 40% - 65%; Di-functional acrylate monomer: 1% - 10%; Impact-resistant core-shell resin: 15% - 30%; Elastomer: 5% - 15%; Initiator: 1 - 5%; Stabilizer: 0.1 - 1%; Coupling agent: 0.1 - 2%; Volatile inhibitor: 0.3 - 1%, The raw material composition of component B includes the following parts by weight: Mono-functional acrylate monomer: 40% - 65%; Di-functional acrylate monomer: 1% - 10%; Impact-resistant core-shell resin: 15% - 30%; Elastomer: 5% - 15%; Adhesion promoter: 1% - 3%; Reducing agent: 0.1 - 1%; Stabilizer: 0.1 - 1%; Accelerator: 0.01 - 0.05%; Volatile inhibitor: 0.3 - 3%; Components A and B are mixed evenly in a volume ratio of 1:1; The mono-functional acrylate monomer is a mixture of tetrahydrofurfuryl methacrylate, hydroxypropyl methacrylate, and hydroxyethyl methacrylate, and the mixing ratio is 30:11:19 in component A and 32:11:19 in component B; Or it is a mixture of phenoxyethyl methacrylate, hydroxypropyl methacrylate, and hydroxyethyl methacrylate, and the mixing ratio is 30:11:19 in component A and 32:11:19 in component B; The di-functional acrylate monomer is ethoxylated bisphenol A dimethacrylate; The impact-resistant core-shell resin is MBS resin B564; The elastomer is any one of the mixtures of nitrile rubber and SBS resin, or polybutadiene rubber and SBS resin; The mixing ratio of MBS resin B564, SBS resin, and nitrile rubber is 10:8:10; The mixing ratio of MBS resin B564, SBS resin, and polybutadiene rubber is 10:8:10; The reducing agent is a transition metal salt; The accelerator is any one of cobalt isooctanoate or copper naphthenate; The adhesion promoter is 2-hydroxyethyl methacrylate phosphate; The stabilizer is a mixture of hydroquinone and oxalic acid; The initiator is cumene hydroperoxide; The coupling agent is any one or a mixture of two or more of γ-aminopropyltriethoxysilane, γ-(2,3-epoxypropoxy)propyltrimethoxysilane, γ-methacryloxypropyltrimethoxysilane, vinyltriethoxysilane, γ-mercaptopropyltrimethylsilane, and vinyltris(2-methoxyethoxy)silane; The volatile inhibitor is paraffin wax; The low-odor acrylate adhesive is prepared by the following steps: Preparation of component A: Put the mono-functional acrylate monomer, di-functional acrylate monomer, impact-resistant core-shell resin, elastomer, volatile inhibitor, and stabilizer into a reaction kettle, stir until the impact-resistant core-shell resin and elastomer are completely dissolved; then put the initiator and coupling agent into the reaction kettle and stir for 1 - 2 hours until evenly mixed, and remove air bubbles under vacuum to obtain component A; Preparation of Component B: Put monofunctional acrylate monomer, difunctional acrylate monomer, impact-resistant core-shell resin, elastomer, volatility inhibitor, and stabilizer into a reaction kettle, and stir until the impact-resistant core-shell resin and elastomer are completely dissolved; then put adhesion promoter, reducing agent, and accelerator into the reaction kettle and stir for 1 - 3 hours until evenly mixed, and remove air bubbles under vacuum to obtain Component B; Mix Component A and Component B evenly according to a volume ratio of 1:1 and apply the glue.

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