Adhesive for bonding elastomer to glass or metal

Abstract

The invention provides an adhesive for bonding an elastomer and glass or metal, which comprises a component A, a component B and a component C. The component A comprises the following components in percentage by mass: 5-15% of modified chlorinated polypropylene resin; 60%-90% of a solvent; 3%-20% of solvent oil; 0.1%-3% of gaseous silicon; the component B comprises the following components in percentage by weight: 10%-50% of isocyanate; 2%-20% of silane; 30%-88% of a solvent; the component C comprises the following components in percentage by weight: 3%-15% of an anti-rust pigment; 30%-85% of a solvent; 0.5%-5% of gaseous silicon; 0.5%-5% of zinc oxide; 0.2%-15% of an amino curing agent and 0.2%-5% of an amino accelerator. The adhesive disclosed by the invention can achieve the effects that a base material is completely damaged after bonding, good bonding force is kept after aging, the base material is damaged, and meanwhile, the adhesive has the characteristics of high bonding speed and capability of meeting the requirements of an industrial production process.

Description

Technical Field

[0001] The present invention belongs to the technical field of adhesives, and particularly relates to an adhesive for bonding elastomers to glass or metal. Background Art

[0002] In industrial production, bonding of elastomers to glass or metal materials is required for many components. The traditional bonding method mainly is: dissolving modified polypropylene in a solvent, then coating it on the surface of glass or metal materials, and after volatilizing the solvent, a dry coating with a thickness of several micrometers is formed. Then, the elastomer is applied to the surface of the coating by injection molding, hot pressing or other methods to achieve bonding.

[0003] Traditional solvent-based modified polypropylene adhesives can achieve a certain bonding strength, but there are some grades of elastomers whose bonding surfaces cannot meet the requirement of complete substrate failure, and even the bonding strength will decrease significantly or the adhesion will be lost after aging. Summary of the Invention

[0004] The purpose of the present invention is to overcome at least one of the above-mentioned disadvantages in the prior art and provide an adhesive for bonding elastomers to glass or metal.

[0005] To solve the above technical problems, the present invention provides an adhesive for bonding elastomers to glass or metal, which includes component A, component B and component C. By mass ratio,

[0006] Component A includes the following components: modified chlorinated polypropylene resin: 5% - 15%; solvent: 60% - 90%; solvent oil: 3% - 20%; fumed silica: 0.1% - 3%;

[0007] Component B includes the following components: isocyanate: 10% - 50%; silane: 2% - 20%; solvent: 30% - 88%;

[0008] Component C includes the following components: rust-inhibiting pigment: 3% - 15%; solvent: 30% - 85%; fumed silica: 0.5% - 5%; zinc oxide: 0.5% - 5%; amino curing agent: 0.2% - 15%, amino promoter: 0.2% - 5%;

[0009] The amino curing agent is one or a mixture of two or more of 1,2-dimethylimidazole, diethylenetriamine, triethylenetetramine, and tetraethylenepentamine. The amino promoter is 2,4,6-tris(dimethylaminomethyl)phenol (DMP-30) or a mixture of DMP-30 and a tertiary amine. Among them, the tertiary amine can be selected from: 2,4,6-tris(dimethylaminomethyl)phenol (TAP); 2,4,6-tris(dimethylaminomethyl)phenol tris(2-ethylhexanoate); 2,4,6-tris(dimethylaminomethyl)phenol trioleate; benzyldimethylamine; triethylamine; triethanolamine; o-hydroxybenzyldimethylamine, etc.

[0010] Preferably, in the C component, the rust-inhibitive pigment is one or a mixture of aluminum dihydrogen tripolyphosphate, aluminum tripolyphosphate, or modified aluminum tripolyphosphate, and is white.

[0011] Preferably, in the A component, the modified chlorinated polypropylene resin is a maleic anhydride-modified chlorinated polypropylene resin. In the present invention, the maleic anhydride-modified chlorinated polypropylene resin is obtained by using maleic anhydride as a modifying monomer and blending and modifying it with a chlorinated polypropylene resin.

[0012] Preferably, in the A component, the solvent includes 10% - 40% of a first solvent and 50% - 70% of a second solvent. The first solvent is an environmentally friendly solvent, and the second solvent is an alkane solvent; the solvent oil is an aromatic solvent oil; the fumed silica is a solvent-based fumed silica.

[0013] In the B component, the isocyanate is a single PAPI (polymethylene polyphenyl polyisocyanate) or a mixture of PAPI isocyanate and one or more of TDI, HDI, and HXDI binary isocyanates. The dosage range is preferably 5 - 50%. The silane is an epoxy group-containing silane; the solvents are all environmentally friendly solvents.

[0014] In the C component, the solvents are all environmentally friendly solvents; the fumed silica is a solvent-based fumed silica; the zinc oxide is nano-zinc oxide.

[0015] In the solvent oil of the present invention, aromatic solvent oil is preferably used, such as xylene, toluene, p-xylene, turpentine, camphor oil, etc.

[0016] In the A component and C component of the present invention, solvent-based fumed silica is preferably used. Fumed silica, also known as: fumed silica, is in the form of a white fluffy powder at normal temperature and pressure, with a porous structure. Among them, solvent-based fumed silica is fumed silica that can be uniformly dispersed in a solvent, generally referring to hydrophobic fumed silica, and water-based fumed silica is fumed silica that can be uniformly dispersed in water, generally referring to hydrophilic fumed silica. In addition, fumed silica with a specific surface area greater than 100 square meters per gram is preferably used.

[0017] Preferably, the environment-friendly solvent is propylene glycol methyl ether acetate (PMA). For alkane solvents, solvents such as methylcyclohexane, cyclohexane, butylcyclohexane, and cyclopentane can be used.

[0018] Preferably, the components A, B, and C are mixed in a mass ratio of (9-11):(0.5-1.5):(0.5-1.5) to form the adhesive, and the preferred mass ratio is 10:1:1.

[0019] Preferably, the component C is shaken evenly first, and then the components A, B, and C are mixed and shaken evenly according to a preset mass ratio to form the adhesive.

[0020] The adhesive provided by the present invention for bonding elastomers to glass or metal can achieve complete destruction of the substrate after bonding, maintain good bonding force after aging and achieve substrate destruction, and at the same time has the characteristics of fast bonding speed and meeting the requirements of industrial production processes. Detailed implementation mode

[0021] In order to make the technical means, creative features, achieved purposes, and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0022] In the following embodiments, the test methods are all conventional methods unless otherwise specified; the reagents or consumables involved can be obtained through commercial channels unless otherwise specified.

[0023] Example 1

[0024] This Example 1 provides an adhesive for bonding elastomers to glass or metal, which consists of the following components by mass ratio:

[0025] Component A: maleic anhydride modified polypropylene chloride resin: 9%, PMA: 20%, cyclohexane: 60%, C10 mixed aromatic oil: 10%, fumed silica: 1%;

[0026] Component B: PAPI: 15%, silane: 3%, PMA: 82%;

[0027] Component C: aluminum dihydrogen tripolyphosphate: 5%, PMA: 80%, fumed silica: 3%, zinc oxide: 2%, triethylenediamine: 8%, DMP-30: 2%.

[0028] For the preparation method of Component A: Weigh each material accurately and add them into a glass container; use a high-speed dispersion disk to stir at a speed of 150 RPM for 1 - 2 hours while maintaining the solution temperature at 60 ± 2°C; observe that the solution is evenly dispersed without obvious particles, then it is completed. For the preparation methods of Components B and C: Weigh each material accurately and add them into a glass container; use a high-speed dispersion disk to stir at a speed of 300 RPM for 15 - 20 minutes; observe that the solution is evenly dispersed without obvious particles, then it is completed.

[0029] When using the adhesive of Example 1, first shake Component C evenly to ensure that each component is evenly dispersed, then mix the prepared Components A, B, and C in a mass ratio of 10:1:1 and shake evenly, thus forming the adhesive of Example 1.

[0030] Example 2

[0031] Example 2 provides an adhesive for bonding elastomers to glass or metal. By mass ratio, it consists of the following:

[0032] Component A: Maleic anhydride modified polypropylene resin: 7%, PMA: 15%, cyclohexane: 60%, C10 mixed aromatic oil: 15%, fumed silica: 3%;

[0033] Component B: PAPI: 20%, silane: 5%, PMA: 75%;

[0034] Component C: Aluminum dihydrogen tripolyphosphate: 8%, PMA: 85%, fumed silica: 2%, zinc oxide: 1%, 1,2 - dimethylimidazole: 3%, DMP - 30: 1%.

[0035] For the preparation method of Component A: Weigh each material accurately and add them into a glass container; use a high-speed dispersion disk to stir at a speed of 150 RPM for 1 - 2 hours while maintaining the solution temperature at 60 ± 2°C; observe that the solution is evenly dispersed without obvious particles, then it is completed. For the preparation methods of Components B and C: Weigh each material accurately and add them into a glass container; use a high-speed dispersion disk to stir at a speed of 300 RPM for 15 - 20 minutes; observe that the solution is evenly dispersed without obvious particles, then it is completed.

[0036] When using the adhesive of Example 2, first shake Component C evenly to ensure that each component is evenly dispersed, then mix the prepared Components A, B, and C in a mass ratio of 10:1:1 and shake evenly, thus forming the adhesive of Example 2.

[0037] Example 3

[0038] Example 3 provides an adhesive for bonding elastomers to glass or metal. By mass ratio, it consists of the following:

[0039] Component A: Maleic anhydride modified polypropylene resin: 8%, PMA: 15%, cyclohexane: 60%, C10 mixed aromatic oil: 15%, fumed silica: 2%;

[0040] Component B: PAPI: 20%, TDI: 20%, silane: 5%, PMA: 55%;

[0041] Component C: Aluminium dihydrogen tripolyphosphate: 5%, PMA: 85%, fumed silica: 2%, zinc oxide: 1%, tetraethylenepentamine: 5%, DMP-30: 2%.

[0042] For the preparation method of Component A: Weigh each material accurately and add them into a glass container; use a high-speed dispersing disc to stir at a speed of 150 RPM for 1 - 2 hours while keeping the solution temperature at 60 ± 2°C; observe that the solution is evenly dispersed without obvious particles, then it is completed. For the preparation methods of Component B and Component C: Weigh each material accurately and add them into a glass container; use a high-speed dispersing disc to stir at a speed of 300 RPM for 15 - 20 minutes; observe that the solution is evenly dispersed without obvious particles, then it is completed.

[0043] When using the adhesive of Example 3, first shake Component C evenly to ensure that each component is evenly dispersed, then mix the prepared Component A, Component B, and Component C in a mass ratio of 10:1:1 and shake evenly, thus forming the adhesive of Example 3.

[0044] Comparative Example 1

[0045] Provide an adhesive, by mass ratio, consisting of the following:

[0046] PMA: 18%, cyclohexane: 50%, C10 mixed aromatic oil: 20%, fumed silica: 1%, maleic anhydride modified chlorinated polypropylene resin: 11%.

[0047] Its preparation method is: Weigh each material accurately and add them into a glass container; use a high-speed dispersing disc to stir at a speed of 150 RPM for 1 - 2 hours while keeping the solution temperature at 60 ± 2°C; observe that the solution is evenly dispersed without obvious particles, then it is completed.

[0048] Comparative Example 2

[0049] Provide an adhesive, by mass ratio, consisting of the following:

[0050] Component A: Maleic anhydride modified polyvinyl chloride resin: 9%, PMA: 20%, cyclohexane: 60%, C10 mixed aromatic oil: 10%, fumed silica: 1%;

[0051] Component B: PAPI: 15%, silane: 3%, PMA: 82%;

[0052] Component C: Aluminium dihydrogen tripolyphosphate: 5%, PMA: 90%, Fumed silica: 3%, Zinc oxide: 2%.

[0053] For the preparation method of Component A: Weigh each material accurately and add them into a glass container; Use a high-speed dispersion disk to stir at a speed of 150 RPM for 1 - 2 hours while maintaining the solution temperature at 60 ± 2°C; Observe that the solution is evenly dispersed without obvious particles, then it is completed. For the preparation methods of Components B and C: Weigh each material accurately and add them into a glass container; Use a high-speed dispersion disk to stir at a speed of 300 RPM for 15 - 20 minutes; Observe that the solution is evenly dispersed without obvious particles, then it is completed.

[0054] When using the adhesive of Comparative Example 2, first shake Component C evenly to ensure that each component is evenly dispersed, then mix the prepared Components A, B, and C in a mass ratio of 10:1:1 and shake evenly, thus forming the adhesive of Comparative Example 2.

[0055] Comparative Example 3

[0056] Provide an adhesive, by mass ratio, consisting of the following:

[0057] Component A: Maleic anhydride modified chlorinated polypropylene resin: 9%, PMA: 25%, Cyclohexane: 50%, C10 mixed aromatic oil: 15%, Fumed silica: 1%;

[0058] Component B: PAPI: 15%, TDI diisocyanate: 15%, Silane: 3%, PMA: 67%;

[0059] Component C: Aluminium dihydrogen tripolyphosphate: 5%, PMA: 89.9%, Fumed silica: 3%, Zinc oxide: 2%, Triethylenediamine: 0.1%.

[0060] For the preparation method of Component A: Weigh each material accurately and add them into a glass container; Use a high-speed dispersion disk to stir at a speed of 150 RPM for 1 - 2 hours while maintaining the solution temperature at 60 ± 2°C; Observe that the solution is evenly dispersed without obvious particles, then it is completed. For the preparation methods of Components B and C: Weigh each material accurately and add them into a glass container; Use a high-speed dispersion disk to stir at a speed of 300 RPM for 15 - 20 minutes; Observe that the solution is evenly dispersed without obvious particles, then it is completed.

[0061] When using the adhesive of Comparative Example 3, first shake Component C evenly to ensure that each component is evenly dispersed, then mix the prepared Components A, B, and C in a mass ratio of 10:1:1 and shake evenly, thus forming the adhesive of Comparative Example 3.

[0062] Example 4

[0063] Dip a sponge into the mixed adhesives in Examples 1 to 3 and Comparative Examples 1 to 3, and evenly apply them on the surfaces of glass and metal materials (stainless steel, aluminum). Place them at room temperature for more than half an hour to ensure that the solvent volatilizes to form a dry coating. Set the temperature of the injection molding machine to 240 °C and inject elastomers (TPE with a melt index ≥ 20, TPS with a melt index ≥ 15, TPE with a melt index ≤ 2, TPS with a melt index ≤ 2, and the melt indices of the TPE and TPS resins are all tested under the conditions of 230 °C and 2.16 KG) onto the glass and metal surfaces to complete bonding. Injection molding process: 240 °C for 10 seconds. Let the sample stand at room temperature for 24 hours for testing.

[0064] The test method is as follows: Execute according to the method in GBT 7122-1996. 90° peel strength, width 25 mm, peel thickness 3 mm, elastomer thickness 3 mm, tensile speed: 50 mm / min.

[0065] The specific test results are as follows and shown in Table 1:

[0066] After the adhesives in Examples 1 to 3 were tested on the surfaces of glass, stainless steel, and aluminum, all elastomers could break.

[0067] Table 1

[0068]

[0069] In this specification, the present invention has been described with reference to its specific embodiments. However, it is obvious that various modifications and transformations can still be made without departing from the spirit and scope of the present invention. Therefore, the specification should be regarded as illustrative rather than restrictive.

Claims

1. An adhesive for bonding an elastomer to glass or metal, characterized in that: Including component A, component B and component C, calculated by mass ratio, The component A comprises the following ingredients: modified chlorinated polypropylene resin: 5% to 15%; Solvent: 60%~90%; Solvent oil: 3%~20%; Gas silicon: 0.1%~3%; The B component includes the following ingredients: isocyanate: 10% to 50%; Silane: 2% to 20%; Solvent: 30%~88%; The C component includes the following ingredients: anti-rust pigment: 3% to 15%; solvent: 30% to 85%; gas silicon: 0.5% to 5%; Zinc oxide: 0.5% to 5%; amino curing agent: 0.2% to 15%, amino accelerator: 0.2% to 5%; The amino curing agent is one or a mixture of two or more of 1,2-dimethylimidazole, diethylenetriamine, triethylenetetramine, and tetraethylenepentamine; The amino accelerator is 2,4,6-tris(dimethylaminomethyl)phenol or a mixture of 2,4,6-tris(dimethylaminomethyl)phenol and a tertiary amine.

2. The adhesive for bonding an elastomer to glass or metal according to claim 1, characterized in that: In the component C, the anti-rust pigment is a mixture of one or more of dihydrogen aluminum tripolyphosphate, aluminum tripolyphosphate or modified aluminum tripolyphosphate.

3. The adhesive for bonding an elastomer to glass or metal according to claim 1 or 2, characterized in that: In the component A, the modified chlorinated polypropylene resin is maleic anhydride modified chlorinated polypropylene resin.

4. The adhesive for bonding an elastomer to glass or metal according to claim 1, characterized in that: In the component A, the solvent includes 10% to 40% of a first solvent and 50% to 70% of a second solvent, the first solvent is an environmentally friendly solvent, the second solvent is an alkane solvent; the solvent oil is an aromatic solvent oil; the gas silicon is a solvent-type gas silicon; In the B component, the isocyanate is PAPI alone or a mixture of PAPI isocyanate and one or more diisocyanates selected from TDI, HDI, and HXDI; the silane is epoxysilane; and the solvents are all environmentally friendly solvents; In the C component, the solvents are all environmentally friendly solvents; the gas silica is solvent-based gas silica; and the zinc oxide is nano zinc oxide.

5. The adhesive for bonding an elastomer to glass or metal according to claim 4, characterized in that: The environmentally friendly solvent is propylene glycol methyl ether acetate.

6. The adhesive for bonding an elastomer to glass or metal according to claim 4, characterized in that: The component A, component B and component C are mixed in a mass ratio of (9-11):(0.5-1.5):(0.5-1.5) to form the adhesive.

7. The adhesive for bonding an elastomer to glass or metal according to claim 1, characterized in that: First, shake component C evenly, and then mix component A, component B, and component C according to a preset mass ratio and shake evenly to form the adhesive.

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