Adhesive with anti-corrosion function

Abstract

The invention discloses an adhesive with an anti-corrosion function, which is characterized by comprising the following raw materials in parts by weight: 80-150 parts of mixed epoxy resins, 20-40 parts of polyurethane prepolymers, 10-25 parts of curing agents, 2-5 parts of accelerants, 10-20 parts of fillers, 1-3 parts of deoxidants and 4-8 parts of preservatives, wherein the mixed epoxy resin comprises at least two of glycidyl ethers, glycidyl esters and alicyclic epoxy resin; the polyurethane prepolymer is prepared by carrying out a prepolymerization reaction on oligomer polyol and isocyanate, and the mass ratio of the oligomer polyol to the isocyanate is 1: (1-3). The adhesive has strong adhesiveness and corrosion resistance, and is especially suitable for metal surfaces which are easyto oxidize and corrode.

Description

technical field

[0001] The invention relates to the technical field of adhesives, in particular to an adhesive with anti-corrosion function. Background technique

[0002] Adhesive is a substance with good adhesive properties, which acts to connect objects by bonding surfaces through adhesion and cohesion. Adhesives are divided into natural polymer compounds (such as starch, animal skin glue, bone glue and natural rubber, etc.), synthetic polymer compounds (such as epoxy resin, phenolic resin, urea-formaldehyde resin, polyurethane and other thermosetting resins and polyvinyl acetal, superglue, etc.) thermoplastic resins such as vinyl chloride resin or synthetic rubber, etc.), or inorganic compounds (such as silicates, phosphates, etc.). Among them, in industrial production, synthetic polymer adhesives are more commonly used.

[0003] Epoxy resin adhesives have a series of excellent properties, such as: good adhesion, wide bonding range, excellent mechanical properties, smal...

Examples

preparation example Construction

[0028] 1. Preparation of polyurethane prepolymer: dehydrate polyethylene glycol 3000 (10 parts by weight of raw materials) at 110°C for 2 hours under a vacuum of 0.1MPa, and then mix with the prepared amount at 80°C Good diphenylmethane diisocyanate (20 parts by weight of raw materials) was reacted to form a low molecular weight prepolymer, and the reaction time was 2 hours to obtain a polyurethane prepolymer, which was stored under anhydrous conditions for use.

[0029] 2. Preparation of mixed epoxy resin: mix 40 parts of bisphenol A epoxy resin and 60 parts of 4-vinylcyclohexene (in parts by weight of raw materials), and mix them uniformly for later use.

[0030] 3. Other raw material components are commercially purchased. The main raw materials used in the examples of the present invention and comparative examples are as follows: bisphenol A epoxy resin: E-44; curing agent: N-aminoethylpiperazine; Accelerator: calcium carboxylate; filler: microsilica; oxygen scavenger: dihydr...

Embodiment 1

[0032] A kind of adhesive with anticorrosion function, its raw material composition is as shown in table 1 below:

[0033] Table 1. Adhesive preparation raw materials

[0034] components parts by mass Hybrid Epoxy 100 Polyurethane prepolymer 30 Hardener 20 Accelerator 3 filler 15 Oxygen scavenger 2 preservative 6

[0035] A method for preparing and using an adhesive with anti-corrosion function, comprising the steps of:

[0036] S1. Add the mixed epoxy resin, accelerator, filler, oxygen scavenger and preservative into the stirring tank in order, and mix the raw materials evenly through the mixer;

[0037] S2. Add polyurethane prepolymer and curing agent sequentially to the above raw materials, stir for 10 minutes and heat to 80°C to prepare an adhesive;

[0038] S3. Coating the adhesive between the two layers of galvanized sheets and curing it for 1 hour to obtain a galvanized sheet product bonded by the adhesive.

Embodiment 2

[0040] A kind of adhesive with anticorrosion function, its raw material composition is as shown in table 2 below:

[0041] Table 2. Adhesive preparation raw materials

[0042] components parts by mass Hybrid Epoxy 80 Polyurethane prepolymer 30 Hardener 20 Accelerator 3 filler 15 Oxygen scavenger 2 preservative 6

[0043] Compared with Example 1, the amount of mixed epoxy resin in this example is 80 parts, and the ratio of mixed epoxy resin to polyurethane prepolymer is 8:3. The preparation method is the same as in Example 1.

technical field

[0001] The invention relates to the technical field of adhesives, in particular to an adhesive with anti-corrosion function. Background technique

[0002] Adhesive is a substance with good adhesive properties, which acts to connect objects by bonding surfaces through adhesion and cohesion. Adhesives are divided into natural polymer compounds (such as starch, animal skin glue, bone glue and natural rubber, etc.), synthetic polymer compounds (such as epoxy resin, phenolic resin, urea-formaldehyde resin, polyurethane and other thermosetting resins and polyvinyl acetal, superglue, etc.) thermoplastic resins such as vinyl chloride resin or synthetic rubber, etc.), or inorganic compounds (such as silicates, phosphates, etc.). Among them, in industrial production, synthetic polymer adhesives are more commonly used.

[0003] Epoxy resin adhesives have a series of excellent properties, such as: good adhesion, wide bonding range, excellent mechanical properties, smal...

Examples

preparation example Construction

[0028] 1. Preparation of polyurethane prepolymer: dehydrate polyethylene glycol 3000 (10 parts by weight of raw materials) at 110°C for 2 hours under a vacuum of 0.1MPa, and then mix with the prepared amount at 80°C Good diphenylmethane diisocyanate (20 parts by weight of raw materials) was reacted to form a low molecular weight prepolymer, and the reaction time was 2 hours to obtain a polyurethane prepolymer, which was stored under anhydrous conditions for use.

[0029] 2. Preparation of mixed epoxy resin: mix 40 parts of bisphenol A epoxy resin and 60 parts of 4-vinylcyclohexene (in parts by weight of raw materials), and mix them uniformly for later use.

[0030] 3. Other raw material components are commercially purchased. The main raw materials used in the examples of the present invention and comparative examples are as follows: bisphenol A epoxy resin: E-44; curing agent: N-aminoethylpiperazine; Accelerator: calcium carboxylate; filler: microsilica; oxygen scavenger: dihydr...

Embodiment 1

[0032] A kind of adhesive with anticorrosion function, its raw material composition is as shown in table 1 below:

[0033] Table 1. Adhesive preparation raw materials

[0034] components parts by mass Hybrid Epoxy 100 Polyurethane prepolymer 30 Hardener 20 Accelerator 3 filler 15 Oxygen scavenger 2 preservative 6

[0035] A method for preparing and using an adhesive with anti-corrosion function, comprising the steps of:

[0036] S1. Add the mixed epoxy resin, accelerator, filler, oxygen scavenger and preservative into the stirring tank in order, and mix the raw materials evenly through the mixer;

[0037] S2. Add polyurethane prepolymer and curing agent sequentially to the above raw materials, stir for 10 minutes and heat to 80°C to prepare an adhesive;

[0038] S3. Coating the adhesive between the two layers of galvanized sheets and curing it for 1 hour to obtain a galvanized sheet product bonded by the adhesive.

Embodiment 2

[0040] A kind of adhesive with anticorrosion function, its raw material composition is as shown in table 2 below:

[0041] Table 2. Adhesive preparation raw materials

[0042] components parts by mass Hybrid Epoxy 80 Polyurethane prepolymer 30 Hardener 20 Accelerator 3 filler 15 Oxygen scavenger 2 preservative 6

[0043] Compared with Example 1, the amount of mixed epoxy resin in this example is 80 parts, and the ratio of mixed epoxy resin to polyurethane prepolymer is 8:3. The preparation method is the same as in Example 1.