Adhesive as well as preparation method and application thereof

Abstract

The invention discloses an adhesive and a preparation method and application thereof, and the adhesive is prepared from the following components in parts by weight: 40-70 parts of natural rubber, 5-10 parts of hydroxyethyl methylacrylate, 2.5-5 parts of an initiator, 10-20 parts of an organic solvent, 10-20 parts of an inorganic filler, 1-2 parts of a curing agent, 1-2 parts of a polymer mildew preventive and 0.5-1 part of a reinforcing agent. Natural rubber is used as a main material, the macromolecular mildew preventive is added to increase the mildew resistance of the adhesive, the situation that the adhesive is mildewed in a humid environment for a long time is avoided, the reinforcing agent and the inorganic filler are added, the strength of the adhesive is enhanced, and the adhesion stability is improved; by adding hydroxyethyl methylacrylate and utilizing active free radicals generated by an initiator, the polarity of the natural rubber is greatly improved, the adhesion and compatibility between the natural rubber and a polar material are improved, and the situation that the adhesive force is too low is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of adhesives, in particular to an adhesive and a preparation method and application thereof. Background Art

[0002] Adhesives are a type of substance used to bond or adhere various objects or materials. They can be used to bond wood, paper, glass, ceramics, metals, plastics, rubber, etc. They are widely used in packaging, printing, shoemaking, clothing, electrical appliances, construction, decoration, automobiles, aviation, furniture, medical treatment, etc. For example, a natural rubber pressure-sensitive adhesive with application number CN202211702132.X (publication number CN115873530A), its preparation process and adhesive tape, the natural rubber pressure-sensitive adhesive includes the following raw material components by weight: 100 parts of natural rubber, 10-30 parts of epoxidized natural rubber, 0.1-0.3 parts of peptizer, 10-100 parts of tackifying resin, 1-10 parts of polyisobutylene, 1-10 parts of plasticizer, 0.1-0.5 parts of antioxidant, 0.1-0.5 parts of light stabilizer, 0.1-1 parts of accelerator, 1-6 parts of cross-linking agent, 1-10 parts of mineral oil and solvent. The natural rubber pressure-sensitive adhesive of the present invention can have both high bio-based content and excellent adhesion.

[0003] However, since the bonding strength of natural rubber is not high and its polarity is relatively small, its bonding performance with polar adherends or other adhesives is poor. It is usually necessary to improve the polarity and adhesion of natural rubber by grafting acrylate monomers to natural rubber and adding some tackifying resins. However, the grafting of acrylate monomers to natural rubber introduces petrochemical raw materials, which is not in line with the development direction of environmental protection. The latter is only a simple physical mixing, and many tackifying resins have a large difference in polarity with natural rubber, which is easy to disperse unevenly, resulting in poor performance stability. Summary of the invention

[0004] The object of the present invention is to provide an adhesive and a preparation method and application thereof to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: an adhesive, comprising the following components: by weight, 40 to 70 parts of natural rubber, 5 to 10 parts of hydroxyethyl methacrylate, 2.5 to 5 parts of initiator, 10 to 20 parts of organic solvent, 10 to 20 parts of inorganic filler, 1 to 2 parts of curing agent, 1 to 2 parts of polymer mildewproof agent and 0.5 to 1 part of reinforcing agent.

[0006] As a preferred technical solution of the present invention, by weight, 40 parts of natural rubber, 10 parts of hydroxyethyl methacrylate, 5 parts of initiator, 20 parts of organic solvent, 20 parts of inorganic filler, 2 parts of curing agent, 2 parts of polymer mildewproof agent and 1 part of reinforcing agent.

[0007] As a preferred technical solution of the present invention, by weight, the following ingredients are used: 70 parts of natural rubber, 5 parts of hydroxyethyl methacrylate, 2.5 parts of initiator, 10 parts of organic solvent, 10 parts of inorganic filler, 1 part of curing agent, 1 part of polymer mildewproof agent and 0.5 part of reinforcing agent.

[0008] As a preferred technical solution of the present invention, by weight, the following ingredients are used: 55 parts of natural rubber, 8 parts of hydroxyethyl methacrylate, 3 parts of initiator, 15 parts of organic solvent, 15 parts of inorganic filler, 1.5 parts of curing agent, 1.5 parts of polymer mildewproofing agent and 1 part of reinforcing agent.

[0009] As a preferred technical solution of the present invention, the initiator is dibenzoyl peroxide, the organic solvent includes one or more mixtures of acetone, butanone, N,N-dimethylformamide, and dichloromethane, the inorganic filler includes one or more mixtures of silicon dioxide, calcium carbonate, calcium silicate, titanium dioxide, and talc, the curing agent is an acid anhydride curing agent, the polymer mildewproof agent is polyethyleneimine, and the reinforcing agent is one or more mixtures of nanocellulose or nano-montmorillonite.

[0010] A method for preparing an adhesive comprises the following steps:

[0011] Step 1: adding natural rubber and hydroxyethyl methacrylate into a reaction kettle according to the weight ratio, heating and stirring for the first time to form a mixture 1; adding an organic solvent and an inorganic filler into the mixture 1 according to the weight ratio, heating and stirring for the second time to form a mixture 2;

[0012] Step 2: adding the initiator to the mixture 2 obtained in step 1 according to the weight ratio, heating and stirring for the third time, standing for a period of time after sufficient reaction, and obtaining a product 1 after reaction;

[0013] Step 3: Add the polymer mildew preventer and the enhancer to the product 1 obtained in step 2 according to the weight ratio, heat and stir for the fourth time, let stand for a period of time after sufficient reaction, and obtain the product 2 after the reaction;

[0014] Step 4: Add the curing agent to the product 2 obtained in step 3 according to the weight ratio, heat and stir for the fifth time, let it stand for a period of time after sufficient reaction, and prepare an adhesive.

[0015] As a preferred technical solution of the present invention, in step one and step two, the heating temperature for the first heating and stirring, the second heating and stirring, and the third heating and stirring is 10-50°C, the stirring time is 30-60 minutes, and the stirring speed is 60-100r / min.

[0016] As a preferred technical solution of the present invention, the heating temperature of the fourth heating and stirring in step three is 20-40°C, the stirring time is 30-60 minutes, the stirring speed is 300r / min, and the standing time is 1-2h.

[0017] As a preferred technical solution of the present invention, the heating temperature of the fifth heating and stirring in step 4 is 20-40°C, the stirring time is 30-60 minutes, the stirring speed is 300r / min, and the standing time is 1-2h. Using natural rubber as the main material, adding a polymer mildew preventer to increase the mildew resistance of the adhesive, avoiding the adhesive from getting moldy in a humid environment for a long time, adding a reinforcing agent to enhance the strength of the adhesive after curing, and improving the adhesion stability

[0018] An application of an adhesive in bonding materials.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: natural rubber is used as the main material, a high molecular mildewproof agent is added to increase the mildewproof performance of the adhesive, and the adhesive is prevented from mildewing in a humid environment for a long time; a reinforcing agent and an inorganic filler are added to enhance the strength of the cured strong adhesive and improve the adhesion stability; hydroxyethyl methacrylate is added and the active free radicals generated by the initiator are used to open and rebond the unsaturated double bonds between the natural rubber and the functional body, thereby realizing double bond grafting; wherein, by introducing strongly polar side groups (such as -OH and -COOH, etc.) into the natural rubber main chain, the polarity of the natural rubber is greatly improved, the adhesion and compatibility between the natural rubber and the polar materials are improved, and the adhesion is avoided to be too low, and the adhesive has strong adhesion and firm adhesion when used in bonding work. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is the preparation diagram of the present invention;

[0021] Figure 2 is a component diagram of Example 1 of the present invention;

[0022] Figure 3 is a component diagram of Example 2 of the present invention;

[0023] Figure 4 is a component diagram of Example 3 of the present invention;

[0024] Figure 5 This is a component diagram of Example 4 of the present invention. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0026] Embodiment 1,

[0027] See also Figure 1 and Figure 2 The present invention provides an adhesive, comprising the following components: by weight, 40 to 70 parts of natural rubber, 5 to 10 parts of hydroxyethyl methacrylate, 2.5 to 5 parts of initiator, 10 to 20 parts of organic solvent, 10 to 20 parts of inorganic filler, 1 to 2 parts of curing agent, 1 to 2 parts of polymer mildewproofing agent and 0.5 to 1 part of reinforcing agent.

[0028] The initiator is dibenzoyl peroxide, the organic solvent includes one or more mixtures of acetone, butanone, N,N-dimethylformamide, and dichloromethane, the inorganic filler includes one or more mixtures of silicon dioxide, calcium carbonate, calcium silicate, titanium dioxide, and talc, the curing agent is an acid anhydride curing agent, the polymer mildewproof agent is polyethyleneimine, and the reinforcing agent is one or more mixtures of nanocellulose or nano-montmorillonite.

[0029] A method for preparing an adhesive comprises the following steps:

[0030] Step 1: adding natural rubber and hydroxyethyl methacrylate into a reaction kettle according to the weight ratio, heating and stirring for the first time to form a mixture 1; adding an organic solvent and an inorganic filler into the mixture 1 according to the weight ratio, heating and stirring for the second time to form a mixture 2;

[0031] Step 2: adding the initiator to the mixture 2 obtained in step 1 according to the weight ratio, heating and stirring for the third time, standing for a period of time after sufficient reaction, and obtaining a product 1 after reaction;

[0032] Step 3: Add the polymer mildew preventer and the enhancer to the product 1 obtained in step 2 according to the weight ratio, heat and stir for the fourth time, let stand for a period of time after sufficient reaction, and obtain the product 2 after the reaction;

[0033] Step 4: Add the curing agent to the product 2 obtained in step 3 according to the weight ratio, heat and stir for the fifth time, let it stand for a period of time after sufficient reaction, and prepare an adhesive.

[0034] In step 1 and step 2, the heating temperature for the first heating and stirring, the second heating and stirring, and the third heating and stirring is 10-50° C., the stirring time is 30-60 minutes, and the stirring speed is 60-100 r / min.

[0035] The heating temperature for the fourth heating and stirring in step 3 is 20-40° C., the stirring time is 30-60 minutes, the stirring speed is 300 r / min, and the standing time is 1-2 h.

[0036] The heating temperature for the fifth heating and stirring in step 4 is 20-40° C., the stirring time is 30-60 minutes, the stirring speed is 300 r / min, and the standing time is 1-2 h.

[0037] An application of an adhesive in bonding materials.

[0038] Embodiment 2,

[0039] See also Figure 1 and Figure 3 The present invention provides an adhesive, comprising the following components: by weight, 40 parts of natural rubber, 10 parts of hydroxyethyl methacrylate, 5 parts of initiator, 20 parts of organic solvent, 20 parts of inorganic filler, 2 parts of curing agent, 2 parts of polymer mildewproof agent and 1 part of reinforcing agent.

[0040] The initiator is dibenzoyl peroxide, the organic solvent includes one or more mixtures of acetone, butanone, N,N-dimethylformamide, and dichloromethane, the inorganic filler includes one or more mixtures of silicon dioxide, calcium carbonate, calcium silicate, titanium dioxide, and talc, the curing agent is an acid anhydride curing agent, the polymer mildewproof agent is polyethyleneimine, and the reinforcing agent is one or more mixtures of nanocellulose or nano-montmorillonite.

[0041] A method for preparing an adhesive comprises the following steps:

[0042] Step 1: adding natural rubber and hydroxyethyl methacrylate into a reaction kettle according to the weight ratio, heating and stirring for the first time to form a mixture 1; adding an organic solvent and an inorganic filler into the mixture 1 according to the weight ratio, heating and stirring for the second time to form a mixture 2;

[0043] Step 2: adding the initiator to the mixture 2 obtained in step 1 according to the weight ratio, heating and stirring for the third time, standing for a period of time after sufficient reaction, and obtaining a product 1 after reaction;

[0044] Step 3: Add the polymer mildew preventer and the enhancer to the product 1 obtained in step 2 according to the weight ratio, heat and stir for the fourth time, let stand for a period of time after sufficient reaction, and obtain the product 2 after the reaction;

[0045] Step 4: Add the curing agent to the product 2 obtained in step 3 according to the weight ratio, heat and stir for the fifth time, let it stand for a period of time after sufficient reaction, and prepare an adhesive.

[0046] In step 1 and step 2, the heating temperature for the first heating and stirring, the second heating and stirring, and the third heating and stirring is 10° C., the stirring time is 60 minutes, and the stirring speed is 100 r / min.

[0047] The heating temperature for the fourth heating and stirring in step 3 is 20° C., the stirring time is 60 minutes, the stirring speed is 300 r / min, and the standing time is 2 hours.

[0048] The heating temperature for the fifth heating and stirring in step 4 is 20° C., the stirring time is 60 minutes, the stirring speed is 300 r / min, and the standing time is 2 hours.

[0049] An application of an adhesive in bonding materials.

[0050] Embodiment 3,

[0051] See also Figure 1 and Figure 4 The present invention provides an adhesive, comprising the following components: by weight, 70 parts of natural rubber, 5 parts of hydroxyethyl methacrylate, 2.5 parts of initiator, 10 parts of organic solvent, 10 parts of inorganic filler, 1 part of curing agent, 1 part of polymer mildewproof agent and 0.5 parts of reinforcing agent.

[0052] The initiator is dibenzoyl peroxide, the organic solvent includes one or more mixtures of acetone, butanone, N,N-dimethylformamide, and dichloromethane, the inorganic filler includes one or more mixtures of silicon dioxide, calcium carbonate, calcium silicate, titanium dioxide, and talc, the curing agent is an acid anhydride curing agent, the polymer mildewproof agent is polyethyleneimine, and the reinforcing agent is one or more mixtures of nanocellulose or nano-montmorillonite.

[0053] A method for preparing an adhesive comprises the following steps:

[0054] Step 1: adding natural rubber and hydroxyethyl methacrylate into a reaction kettle according to the weight ratio, heating and stirring for the first time to form a mixture 1; adding an organic solvent and an inorganic filler into the mixture 1 according to the weight ratio, heating and stirring for the second time to form a mixture 2;

[0055] Step 2: adding the initiator to the mixture 2 obtained in step 1 according to the weight ratio, heating and stirring for the third time, standing for a period of time after sufficient reaction, and obtaining a product 1 after reaction;

[0056] Step 3: Add the polymer mildew preventer and the enhancer to the product 1 obtained in step 2 according to the weight ratio, heat and stir for the fourth time, let stand for a period of time after sufficient reaction, and obtain the product 2 after the reaction;

[0057] Step 4: Add the curing agent to the product 2 obtained in step 3 according to the weight ratio, heat and stir for the fifth time, let it stand for a period of time after sufficient reaction, and prepare an adhesive.

[0058] In step 1 and step 2, the heating temperature for the first heating and stirring, the second heating and stirring, and the third heating and stirring is 40° C., the stirring time is 50 minutes, and the stirring speed is 80 r / min.

[0059] The heating temperature for the fourth heating and stirring in step 3 is 30° C., the stirring time is 40 minutes, the stirring speed is 300 r / min, and the standing time is 2 hours.

[0060] The heating temperature for the fifth heating and stirring in step 4 is 30° C., the stirring time is 50 minutes, the stirring speed is 300 r / min, and the standing time is 2 hours.

[0061] An application of an adhesive in bonding materials.

[0062] Embodiment 4,

[0063] See also Figure 1 and Figure 5 The present invention provides an adhesive, comprising the following components: by weight, 55 parts of natural rubber, 8 parts of hydroxyethyl methacrylate, 3 parts of initiator, 15 parts of organic solvent, 15 parts of inorganic filler, 1.5 parts of curing agent, 1.5 parts of polymer mildewproof agent and 1 part of reinforcing agent.

[0064] The initiator is dibenzoyl peroxide, the organic solvent includes one or more mixtures of acetone, butanone, N,N-dimethylformamide, and dichloromethane, the inorganic filler includes one or more mixtures of silicon dioxide, calcium carbonate, calcium silicate, titanium dioxide, and talc, the curing agent is an acid anhydride curing agent, the polymer mildewproof agent is polyethyleneimine, and the reinforcing agent is one or more mixtures of nanocellulose or nano-montmorillonite.

[0065] A method for preparing an adhesive comprises the following steps:

[0066] Step 1: adding natural rubber and hydroxyethyl methacrylate into a reaction kettle according to the weight ratio, heating and stirring for the first time to form a mixture 1; adding an organic solvent and an inorganic filler into the mixture 1 according to the weight ratio, heating and stirring for the second time to form a mixture 2;

[0067] Step 2: adding the initiator to the mixture 2 obtained in step 1 according to the weight ratio, heating and stirring for the third time, standing for a period of time after sufficient reaction, and obtaining a product 1 after reaction;

[0068] Step 3: Add the polymer mildew preventer and the enhancer to the product 1 obtained in step 2 according to the weight ratio, heat and stir for the fourth time, let stand for a period of time after sufficient reaction, and obtain the product 2 after the reaction;

[0069] Step 4: Add the curing agent to the product 2 obtained in step 3 according to the weight ratio, heat and stir for the fifth time, let it stand for a period of time after sufficient reaction, and prepare an adhesive.

[0070] In step 1 and step 2, the heating temperature for the first heating and stirring, the second heating and stirring, and the third heating and stirring is 50° C., the stirring time is 30 minutes, and the stirring speed is 60 r / min.

[0071] The heating temperature for the fourth heating and stirring in step 3 is 40° C., the stirring time is 30 minutes, the stirring speed is 300 r / min, and the standing time is 2 hours.

[0072] The heating temperature for the fifth heating and stirring in step 4 is 40° C., the stirring time is 30 minutes, the stirring speed is 300 r / min, and the standing time is 2 hours.

[0073] An application of an adhesive in bonding materials.

[0074] In the present invention, the initiator is dibenzoyl peroxide, the organic solvent includes one or more mixtures of acetone, butanone, N,N-dimethylformamide, and dichloromethane, the inorganic filler includes one or more mixtures of silicon dioxide, calcium carbonate, calcium silicate, titanium dioxide, and talc, the curing agent is an acid anhydride curing agent, the polymer mildewproof agent is polyethyleneimine, and the reinforcing agent is one or more mixtures of nanocellulose or nano-montmorillonite;

[0075] Natural rubber is used as the main material, and a high molecular mildewproof agent is added to increase the mildewproof performance of the adhesive to prevent the adhesive from mildewing in a humid environment for a long time. Reinforcers and inorganic fillers are added to enhance the strength of the cured strong adhesive and improve the adhesion stability. Hydroxyethyl methacrylate is added and the active free radicals generated by the initiator are used to open and rebond the unsaturated double bonds between the natural rubber and the functional body to achieve double bond grafting. Among them, by introducing strongly polar side groups (such as -OH and -COOH, etc.) into the natural rubber main chain, the polarity of the natural rubber is greatly improved, and the adhesion and compatibility between the natural rubber and the polar materials are improved to avoid low adhesion. The adhesive has strong viscosity and firm adhesion when used in bonding work.

[0076] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An adhesive, characterized in that: The invention comprises the following components: by weight, 40-70 parts of natural rubber, 5-10 parts of hydroxyethyl methacrylate, 2.5-5 parts of initiator, 10-20 parts of organic solvent, 10-20 parts of inorganic filler, 1-2 parts of curing agent, 1-2 parts of high molecular mildewproof agent and 0.5-1 part of reinforcing agent.

2. An adhesive according to claim 1, characterized in that: By weight, 40 parts of natural rubber, 10 parts of hydroxyethyl methacrylate, 5 parts of initiator, 20 parts of organic solvent, 20 parts of inorganic filler, 2 parts of curing agent, 2 parts of polymer mildewproof agent and 1 part of reinforcing agent.

3. An adhesive according to claim 1, characterized in that: By weight, 70 parts of natural rubber, 5 parts of hydroxyethyl methacrylate, 2.5 parts of initiator, 10 parts of organic solvent, 10 parts of inorganic filler, 1 part of curing agent, 1 part of polymer mildewproof agent and 0.5 parts of reinforcing agent.

4. An adhesive according to claim 1, characterized in that: By weight, the ingredients include 55 parts of natural rubber, 8 parts of hydroxyethyl methacrylate, 3 parts of initiator, 15 parts of organic solvent, 15 parts of inorganic filler, 1.5 parts of curing agent, 1.5 parts of polymer mildewproofing agent and 1 part of reinforcing agent.

5. The adhesive according to claim 1, and its preparation method and use, characterized in that: The initiator is dibenzoyl peroxide, the organic solvent includes one or more mixtures of acetone, butanone, N,N-dimethylformamide and dichloromethane, the inorganic filler includes one or more mixtures of silicon dioxide, calcium carbonate, calcium silicate, titanium dioxide and talc, the curing agent is an acid anhydride curing agent, the polymer mildewproof agent is polyethyleneimine, and the reinforcing agent is one or more mixtures of nanocellulose or nano-montmorillonite.

6. A method for preparing an adhesive according to any one of claims 1 to 5, characterized in that: The following steps are involved: Step 1: adding natural rubber and hydroxyethyl methacrylate into a reaction kettle according to the weight ratio, heating and stirring for the first time to form a mixture 1; adding an organic solvent and an inorganic filler into the mixture 1 according to the weight ratio, heating and stirring for the second time to form a mixture 2; Step 2: adding the initiator to the mixture 2 obtained in step 1 according to the weight ratio, heating and stirring for the third time, standing for a period of time after sufficient reaction, and obtaining a product 1 after reaction; Step 3: Add the polymer mildew preventer and the enhancer to the product 1 obtained in step 2 according to the weight ratio, heat and stir for the fourth time, let stand for a period of time after sufficient reaction, and obtain the product 2 after the reaction; Step 4: Add the curing agent to the product 2 obtained in step 3 according to the weight ratio, heat and stir for the fifth time, let it stand for a period of time after sufficient reaction, and prepare an adhesive.

7. The method for preparing an adhesive according to claim 1, characterized in that: In the step 1 and the step 2, the heating temperature for the first heating and stirring, the second heating and stirring, and the third heating and stirring is 10-50° C., the stirring time is 30-60 minutes, and the stirring speed is 60-100 r / min.

8. The method for preparing an adhesive according to claim 1, characterized in that: The heating temperature of the fourth heating and stirring in step 3 is 20-40° C., the stirring time is 30-60 minutes, the stirring speed is 300 r / min, and the standing time is 1-2 h.

9. The method for preparing an adhesive according to claim 1, characterized in that: The heating temperature for the fifth heating and stirring in step 4 is 20-40° C., the stirring time is 30-60 minutes, the stirring speed is 300 r / min, and the standing time is 1-2 h.

10. Use of an adhesive according to any one of claims 1 to 5 in bonding materials.

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