An adhesive solution, its preparation method and application

Abstract

The present invention provides an adhesive solution, a preparation method and an application thereof, belonging to the technical field of adhesion between rubber and fabric. The adhesive solution provided by the present invention comprises the following components: resorcinol, rubber adhesive A, boron-containing compound and solvent; the mass ratio of resorcinol to rubber adhesive A is 1:0.5-2; the mass ratio of resorcinol to boron-containing compound is 1:0.5-5; the mass ratio of resorcinol to solvent is 1:10-500. On the basis of resorcinol and rubber adhesive A, the present invention introduces a boron-containing compound as an auxiliary for the migration of silicone rubber molecules, improves the fluidity of silicone rubber, enables silicone rubber molecules to better penetrate into the gaps of the fabric, thereby improving the bonding strength. Moreover, the adhesive of the present invention exists in the form of a solution, and the proportion of each component is adjusted so that the adhesive can better penetrate into the fine gaps of the fabric, increasing the bonding strength between silicone rubber and fabric.

Description

Technical Field

[0001] The present invention belongs to the technical field of the adhesion between rubber and skeleton materials, and particularly relates to an adhesive solution, a preparation method thereof and an application thereof. Background Art

[0002] In the silicone rubber industry, the adhesion between silicone rubber and skeleton materials is often encountered, and the adhesion between fabric materials and silicone rubber is more common. The usual practice is to add an adhesive to the silicone rubber compound, or to prepare a glue slurry for coating, and make them combine together through vulcanization crosslinking. The general adhesives are mostly the resorcinol-formaldehyde-silica (RFS) system prepared from resorcinol, methyl donor and silica, but the RFS system is not easy to disperse, and the silicone rubber compound has too strong fluidity during vulcanization, and it cannot well penetrate into the gaps of the fabric by means of vulcanization pressure, resulting in low bonding strength between the silicone rubber and the fabric. Summary of the Invention

[0003] The purpose of the present invention is to provide an adhesive solution, a preparation method thereof and an application thereof, and when the adhesive solution of the present invention is used for the bonding between silicone rubber and fabric, the bonding strength between the two is high.

[0004] The present invention provides an adhesive solution, which comprises the following components: resorcinol, rubber adhesive A, boron-containing compound and solvent;

[0005] The mass ratio of the resorcinol to the rubber adhesive A is 1:0.5 - 2;

[0006] The mass ratio of the resorcinol to the boron-containing compound is 1:0.5 - 5;

[0007] The mass ratio of the resorcinol to the solvent is 1:10 - 500.

[0008] Preferably, the mass ratio of the resorcinol to the rubber adhesive A is 1:0.8 - 1.5.

[0009] Preferably, the mass ratio of the resorcinol to the boron-containing compound is 1:1 - 4.

[0010] Preferably, the boron-containing compound includes one or more of borate esters, boric acid, borate salts, cobalt borate and silicon boron tackifiers.

[0011] Preferably, the borate esters include one or more of trimethyl borate, triethyl borate, tripropyl borate and tributyl borate.

[0012] Preferably, the borate salts include sodium borate and / or potassium borate.

[0013] Preferably, the mass ratio of the resorcinol to the solvent is 1:100 - 400.

[0014] Preferably, the solvent includes one or more of water, ethanol, methanol, ether, ethyl acetate, acetone, chloroform, dichloromethane, benzene, toluene, and xylene.

[0015] The present invention also provides a method for preparing the binder solution described in the above solution, including the following steps:

[0016] Dissolve resorcinol, rubber binder A, and boron-containing compound in the solvent to obtain the binder solution.

[0017] The present invention also provides the application of the binder solution described in the above solution or the binder solution prepared by the preparation method described in the above solution in the bonding of silicone rubber and fabric.

[0018] The present invention provides a binder solution, including the following components: resorcinol, rubber binder A, boron-containing compound, and solvent; the mass ratio of resorcinol to rubber binder A is 1:0.5 - 2; the mass ratio of resorcinol to boron-containing compound is 1:0.5 - 5; the mass ratio of resorcinol to solvent is 1:10 - 500. In the present invention, the boron-containing compound is used as an auxiliary agent for the migration of silicone rubber molecules, which improves the fluidity of silicone rubber, enables silicone rubber molecules to better penetrate into the gaps of the fabric, thereby improving the bonding strength. And the binder of the present invention exists in the form of a solution, enabling the adhesive to better penetrate into the fine gaps of the fabric and increasing the bonding strength between silicone rubber and fabric. The results of the examples show that when the binder of the present invention is used for the bonding of silicone rubber and fabric, the bonding strength is 4.5 - 5.3 N / mm.

[0019] In addition, in the prior art, when preparing the resorcinol-formaldehyde white system glue paste, there are restrictions on the addition order and mixing temperature. Compared with the prior art, the preparation method of the present invention is simple. There is no restriction on the addition order of raw materials during the preparation of the binder solution, and it can be prepared at room temperature. Detailed Embodiments

[0020] The present invention provides a binder solution, including the following components: resorcinol, rubber binder A, boron-containing compound, and solvent;

[0021] The mass ratio of resorcinol to rubber binder A is 1:0.5 - 2;

[0022] The mass ratio of resorcinol to boron-containing compound is 1:0.5 - 5;

[0023] The mass ratio of resorcinol to solvent is 1:10 - 500.

[0024] In the present invention, the mass ratio of resorcinol to rubber adhesive A is 1:0.5 to 2, preferably 1:0.8 to 1.5, and more preferably 1:1 to 1.2. In the present invention, the rubber adhesive A is preferably purchased from JiaCheng Industry (Shanghai) Co., Ltd.

[0025] In the present invention, the mass ratio of resorcinol to the boron-containing compound is 1:0.5 to 5, preferably 1:1 to 4, and more preferably 1:2 to 3. In the present invention, the boron-containing compound includes one or more of borate esters, boric acid, borates, cobalt borate, and silicon-boron tackifiers; the borate esters include one or more of trimethyl borate, triethyl borate, tripropyl borate, and tributyl borate; the borates include sodium borate and / or potassium borate. In the present invention, the silicon-boron tackifier is preferably purchased from Jiangxi Naeen New Materials Co., Ltd. In the present invention, a boron-containing compound is introduced as an auxiliary for the migration of silicone rubber molecules on the basis of resorcinol and rubber adhesive A, which improves the fluidity of the silicone rubber, enabling the silicone rubber molecules to better penetrate into the gaps of the fabric, thereby improving the bonding strength.

[0026] In the present invention, the mass ratio of resorcinol to the solvent is 1:10 to 500, preferably 1:100 to 400, and more preferably 1:200 to 300. In the present invention, the solvent preferably includes one or more of water, ethanol, methanol, ether, ethyl acetate, acetone, chloroform, dichloromethane, benzene, toluene, and xylene. In the present invention, by adding a suitable solvent to dissolve resorcinol and rubber adhesive A and adjusting the proportions of the components to make the components disperse evenly, the adhesive can better penetrate into the fine gaps of the fabric, thereby further increasing the bonding strength between the silicone rubber and the fabric.

[0027] The present invention also provides a preparation method of the binder described in the above solution, including the following steps:

[0028] Mix the resorcinol, rubber adhesive A, boron-containing compound, and solvent to obtain the binder.

[0029] The present invention has no special limitation on the mixing, and it can be mixed according to the methods well-known to those skilled in the art until there are no insoluble substances. The preparation method of the present invention is simple. There is no restriction on the order of adding raw materials during the preparation of the binder solution, and it can be prepared at room temperature, which is convenient to use and reduces the trouble in the use process.

[0030] The present invention also provides the application of the binder solution described in the above solution or the binder solution prepared by the preparation method described in the above solution in the bonding of silicone rubber and fabric. In the present invention, the bonding method of the silicone rubber and the fabric preferably includes the following steps:

[0031] Apply the binder solution to the fabric surface. After drying, calender the silicone rubber compound onto the bonding surface of the fabric, and then carry out standing and vulcanization in sequence.

[0032] In the present invention, the fabric preferably includes 507 nylon plain silk; the calendering pressure is preferably 0.6 - 0.8 MPa; the standing time is preferably 24 - 72 h, more preferably 48 - 64 h; the vulcanization temperature is preferably 170 - 180 °C, more preferably 175 - 178 °C; the pressure is preferably 10 - 15 MPa, more preferably 12 - 13 MPa; the time is preferably 30 - 60 min, more preferably 40 - 50 min.

[0033] To further illustrate the present invention, the following describes in detail a binder solution provided by the present invention, its preparation method and application in conjunction with embodiments, but they cannot be understood as limiting the protection scope of the present invention.

[0034] In the examples and comparative examples of the present invention, the rubber binder A was purchased from Jia Cheng Industry (Shanghai) Co., Ltd.

[0035] Example 1

[0036] The weight part ratio of raw materials is: resorcinol: rubber binder A: triethyl borate: ethanol = 1:1.2:1:20; add resorcinol, rubber binder A, triethyl borate and ethanol into the container respectively, stir at room temperature until there are no more insoluble substances, stand still, and package and store.

[0037] Application Example 1

[0038] Uniformly coat 20 g of the binder in Example 1 on 507 nylon plain silk with an area of 1 m 2 After drying, calender the silicone rubber compound on the fabric surface on a calender (the calendering pressure is 0.6 MPa), then stand for 24 h, and vulcanize at 170 °C and 15 MPa pressure for 30 min. The bonding strength between the silicone rubber and the fabric is measured to be 4.5 N / mm.

[0039] Example 2

[0040] The weight part ratio of raw materials is: resorcinol: rubber binder A: boric acid: ethanol = 1:1.2:1:50; add resorcinol, rubber binder A, boric acid and ethanol into the container respectively, stir at room temperature until there are no more insoluble substances, stand still, and package and store.

[0041] Application Example 2

[0042] Uniformly coat 20 g of the binder in Example 2 on 507 nylon plain silk with an area of 1 m 2For the 507 nylon taffeta, after drying, the silicone rubber compound is calendered onto the fabric surface on a calender (the calendering pressure is 0.6 MPa), and then left to stand for 24 h in sequence. After that, it is vulcanized at 170 °C and 15 MPa for 30 min. The adhesion strength between the silicone rubber and the fabric is 4.7 N / mm.

[0043] Example 3

[0044] The weight ratio of raw materials is: resorcinol: rubber binder A: triethyl borate: ethanol = 1:1.2:1:30; Resorcinol, rubber binder A, triethyl borate and ethanol are added to the container respectively, stirred at room temperature until there are no more insoluble substances, left to stand, and then packaged and stored.

[0045] Application Example 3

[0046] 20 g of the binder from Example 3 is evenly coated on 507 nylon taffeta with an area of 1 m 2 After drying, the silicone rubber compound is calendered onto the fabric surface on a calender (the calendering pressure is 0.6 MPa), and then left to stand for 24 h in sequence. After that, it is vulcanized at 170 °C and 15 MPa for 30 min. The adhesion strength between the silicone rubber and the fabric is 5.3 N / mm.

[0047] Comparative Example 1

[0048] The weight ratio of raw materials is: resorcinol: rubber binder A: ethanol = 1:1.2:20; Resorcinol, rubber binder A and ethanol are added to the container respectively, stirred at room temperature until there are no more insoluble substances, left to stand, and then packaged and stored.

[0049] Comparative Application Example 1

[0050] 20 g of the binder from Comparative Example 1 is evenly coated on 507 nylon taffeta with an area of 1 m 2 After drying, the silicone rubber compound is calendered onto the fabric surface on a calender (the calendering pressure is 0.6 MPa), and then left to stand for 24 h in sequence. After that, it is vulcanized at 170 °C and 15 MPa for 30 min. The adhesion strength between the silicone rubber and the fabric is 2.4 N / mm.

[0051] Comparative Example 2

[0052] The weight ratio of raw materials is: resorcinol: rubber binder A: methyl vinyl silicone rubber 110-2: xylene = 1:1.2:10:30; Resorcinol, rubber binder A, methyl vinyl silicone rubber 110-2 and xylene are added to the container respectively, stirred at room temperature until there are no more insoluble substances, left to stand, and then packaged and stored.

[0053] Comparative Application Example 2

[0054] Apply 40 g of the binder in Comparative Example 2 evenly on 507 nylon plain silk with an area of 1 m 2 . After drying, calender the silicone rubber compound on the fabric surface on a calender (the calendering pressure is 0.6 MPa). Then, after standing for 24 h in sequence, vulcanize for 30 min at 170 °C and a pressure of 15 MPa. The adhesion strength between the silicone rubber and the fabric is 2.5 N / mm.

[0055] In the preparation of protective clothing, the adhesion strength requirement between the rubber compound and 507 nylon plain silk is above 1.8 N / mm. The adhesion strength of the traditional resorcinol - formaldehyde - hexamethylenetetramine system is between 2.0 N / mm and 2.5 N / mm, and the adhesion strength of the binders in Examples 1 - 3 of the present invention is all above 4.0 N / mm.

[0056] Although the above - mentioned embodiments have described the present invention in detail, they are only a part of the embodiments of the present invention, not all of them. Other embodiments can also be obtained based on these embodiments without creative efforts, and these embodiments all fall within the protection scope of the present invention.

Claims

1. A binder solution, characterized in that the components are: resorcinol, rubber binder A, boron-containing compound and solvent; the mass ratio of the resorcinol to the rubber binder A is 1:0.5 - 2; the mass ratio of the resorcinol to the boron-containing compound is 1:0.5 - 5; the mass ratio of the resorcinol to the solvent is 1:10 - 500; the boron-containing compound is one or both of borate ester and boric acid.

2. The binder solution according to claim 1, characterized in that the mass ratio of the resorcinol to the rubber binder A is 1:0.8 - 1.

5.

3. The binder solution according to claim 1, characterized in that the mass ratio of the resorcinol to the boron-containing compound is 1:1 - 4.

4. The binder solution according to claim 1, characterized in that the borate ester includes one or more of trimethyl borate, triethyl borate, tripropyl borate and tributyl borate.

5. The binder solution according to claim 1, characterized in that the mass ratio of the resorcinol to the solvent is 1:100 - 400.

6. The binder solution according to claim 1 or 5, characterized in that the solvent includes one or more of water, ethanol, methanol, ether, ethyl acetate, acetone, chloroform, dichloromethane, benzene, toluene and xylene.

7. A method for preparing the binder solution according to any one of claims 1 - 6, characterized in that it includes the following steps: Dissolve resorcinol, rubber binder A and boron-containing compound in the solvent to obtain the binder solution.

8. Application of the binder solution according to any one of claims 1 - 6 or the binder solution prepared by the preparation method according to claim 7 in the adhesion between silicone rubber and fabric.