CN102732201A - Wear-resistant and weather-resistant epoxy resin coating adhesive and its preparation method - Google Patents

Abstract

The invention relates to a wear-resistant and weather-resistant epoxy resin coating adhesive and a preparation method thereof, belonging to the technical field of adhesives. It consists of A component and B component. Component A; cycloaliphatic glycidyl ether epoxy resin; 6-16 parts, novolac epoxy resin; 15-25 parts, epoxy reactive diluent; 4-6 parts, reactive toughening agent 4-6 parts, Coupling agent; 0.5-1.2 parts, organic bentonite 0.4-0.8 parts, antioxidant; 0.3-0.5 parts, ultraviolet absorber 0.4-0.8 parts, white corundum powder 40-45 parts, filler powder; 3-5 parts, short 4-6 parts of cut glass fiber, 5 parts of yellow paste, 1-2 parts of white carbon black; component B; alicyclic amine; 15-25 parts, isophorone diamine; 10-15 parts, aminoethyl Piperazine; 6-9 parts, curing accelerator; 2-3 parts, white corundum powder; 40-45 parts, chopped glass fiber; 4-6 parts, filler powder; 4-6 parts, white carbon black; 3- 5 parts; the preparation method is divided into the preparation method of yellow color paste, the preparation method of A component and the preparation method of B component. Compared with the prior art, the mechanical strength and wear resistance of the present invention are significantly improved.

Description

Wear-resistant, weather-resistant epoxy resin coating adhesive and preparation method thereof

Technical field:

The invention relates to a wear-resistant and weather-resistant epoxy resin coating adhesive and a preparation method thereof, belonging to the technical field of adhesives.

technical background:

Epoxy resin has good adhesion to most materials, and the cured epoxy resin has the characteristics of high bonding strength, heat resistance, chemical resistance, good dielectric property, and low shrinkage; it is used in bonding and protective coatings. On the one hand, liquid bisphenol A glycidyl ether type epoxy resin is widely used, but because it contains benzene ring, its ultraviolet radiation resistance and aging resistance are poor, and it will gradually change color and pulverize in outdoor environments, making the bonding and protection failure. In addition, when the liquid bisphenol A epoxy resin is cured, the cohesive stress is large, the cured product is hard and brittle, and the acid and alkali resistance and humidity resistance are poor, so it is used to prepare a protective coating that is wear-resistant, weather-resistant, and impact-resistant. limited. Moreover, the viscosity of liquid bisphenol A epoxy resin is relatively high (such as: the viscosity index of E-51 epoxy resin is 10000-15000mpa.s), and the prior art mostly uses epoxy resin diluent to prepare low-viscosity protective coating glue , although the viscosity is reduced, the crosslinking density of the curing reaction is also reduced, which reduces the performance of the protective coating, and epoxy diluents often have certain toxicity and emission problems.

The use of low-viscosity heterocyclic epoxy resins, aliphatic epoxy resins, etc. to prepare protective coatings is either expensive or difficult to cure at room temperature, and is rarely used in outdoor protective coatings.

The cured product of novolac polyglycidyl ether type epoxy resin has high crosslinking density, good heat resistance, weather resistance and acid and alkali corrosion resistance, but it is also hard and brittle, with poor toughness and low viscosity. It is not suitable for the preparation of low-viscosity coating glue; the molecular structure of alicyclic epoxy resin does not contain benzene rings and hydroxyl groups, so it has better resistance to ultraviolet radiation and weather resistance, and has a lower viscosity; but its reactivity is relatively low. Low, it is difficult to react with common amine curing agents at room temperature, which also limits its application.

Invention content:

The purpose of the present invention is to solve technical problems such as poor wear resistance, weather resistance, aging resistance and poor workability of epoxy resin protective coatings in the prior art, and to provide a wear-resistant and weather-resistant epoxy resin coating glue and the preparation method thereof, the epoxy protective coating obtained in this way has low viscosity, normal temperature curing, high strength, high wear resistance, and has good impact toughness, light resistance, weather resistance, aging resistance and thermal stability Excellent performance.

Another object of the present invention is to provide a preparation method of the wear-resistant and weather-resistant epoxy resin coating glue.

In order to achieve the above object, this wear-resistant, weather-resistant epoxy resin coating glue of the present invention is realized like this: by following epoxy resin component (hereinafter referred to as: A component) and curing agent component (hereinafter referred to as : B component) Composition:

Component A: cycloaliphatic glycidyl ether epoxy resin: 6-16 parts, novolac epoxy resin: 15-25 parts, epoxy reactive diluent: 4-6 parts, reactive toughening agent 4-6 parts, Coupling agent: 0.5-1.2 parts, organic bentonite 0.4-0.8 parts, antioxidant: 0.3-0.5 parts, ultraviolet absorber 0.4-0.8 parts, white corundum powder 40-45 parts, filler powder: 3-5 parts, short Cut glass fiber 4-6 parts, yellow color paste 5 parts, white carbon black 1-2 parts;

Component B: alicyclic amine: 15-25 parts, isophorone diamine: 10-15 parts, aminoethylpiperazine: 6-9 parts, curing accelerator: 2-3 parts, white corundum powder: 40 parts -45 parts, chopped glass fiber: 4-6 parts, filler powder: 4-6 parts, white carbon black: 3-5 parts;

The weight ratio of the epoxy resin component to the curing agent component is: 100:18-22.

The novolac epoxy resin is characterized by a novolac polyglycidyl ether, a liquid novolak epoxy resin with an epoxy equivalent of 165-175g/eq and a viscosity of 9500-12000mPa.s, such as PNE172.

The alicyclic glycidyl ether is characterized by a saturated alicyclic structure containing two epoxy groups, and one of the epoxy values of 0.45-0.55, such as: CER-170 and the like.

The reactive toughening agent refers to CYH-277 with branched structure and multi-active end groups or QS-BN that is solidified and phase-separated into a dispersed phase of elastic particles.

The reactive diluent for epoxy resin can be 1,2-cyclohexanediol diglycidyl ether with an epoxy value of 0.50～0.60eq/100g, such as: CD-1180 (the comparison example is 1,6- Hexylene glycol diglycidyl ether epoxy diluent, epoxy value 0.65～0.70eq/100g).

The coupling agent is characterized in that it refers to commercially available silane coupling agents containing epoxy functional groups, such as: γ-glycidyl etheroxypropyl trimethoxysilane (KH560) or γ-methacryloxy One of Propyltrimethoxysilane (KH570).

The organic bentonite refers to commercially available 200 mesh organic bentonite dry powder treated with surface activity.

The antioxidant refers to hindered phenols 2,6-tri-tert-butyl-4-methylphenol (antioxidant 264) or tetrakis[methyl-β-(3,5-di-tert-butyl-4 -Hydroxyphenyl)propionate]one of pentaerythritol esters (antioxidant 1010).

Described yellow color paste refers to the alicyclic glycidyl ether epoxy resin color paste (component A in the present invention) that chrome yellow pigment in the 200 mesh coating is pre-made into chrome yellow 20% in the coating before use. Use 5 parts of yellow color paste, which contains 4 parts of cycloaliphatic epoxy resin and 1 part of chrome yellow pigment in the coating).

The ultraviolet absorber refers to benzotriazoles, such as: 2-(2'-hydroxyl-3', 5'-di-tert-phenyl)-5-chlorinated benzotriazole, such as: UV327.

Described cycloaliphatic amine, can be that active hydrogen equivalent is 35.5g/Eq hydrogenated m-xylylenediamine (H-MXDA) or has the same active hydrogen equivalent 1,4-bis(aminomethyl)cyclohexane ( 1,4-BAC).

Described isophorone diamine refers to the alicyclic amine whose active hydrogen equivalent is 42.6g/Eq.

The aminoethylpiperazine refers to the alicyclic amine (N-AEP) whose active hydrogen equivalent is 15g/Eq.

The curing accelerator is a tertiary amine accelerator 2,4,6-tris(dimethylaminomethyl)phenol, such as DMP-30.

The white corundum powder is a commercially available abrasive grade 1000# white corundum powder with a trigonal crystal system.

The filler powder refers to 1000-mesh calcined α-AL ₂ O ₃ powder or 3000-mesh calcined kaolin, the common feature of which is that the surface of the powder is activated by a coupling agent and well dispersed in the resin and curing components.

The chopped glass fiber refers to chopped glass fiber powder with a fiber diameter of 8-12um and a length of less than 0.5mm.

The white carbon black refers to fumed silica with a specific surface area of 200M ² /g.

The preparation method of the wear-resistant and weather-resistant epoxy resin coating adhesive of the present invention is divided into: a preparation method of yellow color paste, a preparation method of component A and a preparation method of component B:

Preparation of yellow paste:

Weigh alicyclic glycidyl ether epoxy resin and chrome yellow pigment in the coating, mix and moisten with a shovel; adjust the gap between the sticks of the three-roll mill, and pass the mixture three times to obtain a yellow color paste.

Preparation of component A:

Put novolac epoxy resin, cycloaliphatic glycidyl ether epoxy resin, and reactive toughening agent in a planetary disperser, heat the glue to a temperature of 70°C, add epoxy resin reactive diluent, organic bentonite and stir to disperse for 30 Minutes; add filler powder, white corundum powder and stir at high speed for 30 minutes; add chopped glass fiber, stir and disperse for 10 minutes, cool down to 40°C and control the temperature, add coupling agent, antioxidant, UV absorber and stir for 15 minutes, Add yellow color paste and white carbon black, stir at high speed to disperse for 20 minutes; vacuumize and stir at low speed for 30 minutes, filter and discharge.

Preparation of component B:

Put alicyclic amine, isophorone diamine, aminoethylpiperazine, and curing accelerator in a planetary disperser, stir and disperse for 10 minutes; add organic bentonite, stir and disperse for 30 minutes; control temperature at 50°C, add filler Powder, white corundum powder, stir and disperse for 20 minutes; add chopped glass fiber, stir and disperse for 10 minutes; add white carbon black, stir and disperse for 20 minutes, vacuumize and stir at low speed for 30 minutes, filter and discharge.

Use of adhesive: Use an electric mixer to stir component A for 3 minutes, weigh components A and B according to a weight ratio of 100:18~22, stir for 5 minutes with an electric mixer (or mix with a shovel), and let stand for 5 minutes ; Put the uniformly mixed glue on the sizing surface, scrape it with a toothed scraper suitable for the thickness of the coating, and cure it at room temperature for more than 24 hours.

Compared with the prior art, the wear-resistant and weather-resistant epoxy resin coating glue of the present invention has remarkable characteristics and substantial progress:

1. Adopt novolac glycidyl ether epoxy resin with more than 2 epoxy groups. It has high reactivity with amine curing agent at room temperature. After curing, it has high crosslinking density, high glass transition temperature, and is resistant to Good acid and alkali and water corrosion, high bonding strength.

2. Adopt cycloaliphatic glycidyl ether epoxy resin, which does not contain benzene ring and has a saturated alicyclic structure, so its cured product has good resistance to ultraviolet radiation and weather resistance, and can be used outdoors for a long time; the molecular structure contains ether bonds and other polarities bonds and hydroxyl groups, etc., so it has good adhesion and mechanical strength; low viscosity (<100mpa.s&25°C), can be used as an epoxy resin diluent, can be cured at room temperature, and has good weather resistance and heat resistance after curing performance and aging resistance.

3. Cyclohexanediol diglycidyl ether is used as the diluent, which has high dilution and good reactivity. The cured product has excellent light resistance and weather resistance, and has low toxicity and no VOC emissions.

4. Using a reactive toughening agent, using internal cavities in the molecule to cause shear deformation of the cured product to dissipate the impact energy, or using the sea-island effect generated by curing phase separation to attenuate the impact energy, effectively improving the toughness of the cured product and coating impact strength.

5. The coated chrome yellow pigment is used to improve the light fastness of the colored coating.

6. Using 1000 mesh white corundum powder as the wear-resistant aggregate of the coating, while ensuring good dispersion, taking into account the anti-settling property to ensure the wear resistance of the coating.

7. Use hindered phenolic antioxidants to capture free radicals generated by degradation; use resin-specific UV absorbers to convert UV energy, heat sublimation resistance, improve thermal oxygen stability of the coating, reduce photodegradation, and improve the protective coating system Excellent anti-ultraviolet radiation, aging resistance and yellowing resistance.

8. Chopped glass fiber is used to ensure high tensile strength and shear impact strength of the coating.

9. Suspended thixotropic agent organic bentonite and white carbon black are used to ensure good dispersion, anti-sedimentation, moderate thixotropy and anti-sag performance of the adhesive.

10. The alicyclic amine curing agent with high activity can be used to cure the alicyclic epoxy resin with low reactivity at room temperature; Adhesive strength, impact resistance, wear resistance, corrosion resistance are outstanding, and the glass transition temperature is high.

11. No complicated equipment is needed, and the preparation process is simple.

12. Easy to use, suitable pot life and good construction performance.

Compared with the prior art, the wear-resistant and weather-resistant epoxy resin coating glue prepared by the present invention has significantly improved mechanical strength and wear resistance of the wear-resistant protective coating, with a shear strength of 27.5MPa and a body tensile strength of 27.5 MPa. The strength reaches 72.6MPa, and the glass transition temperature (Tg) reaches 118.6°C; in the ultraviolet light weather resistance artificial accelerated aging test and relative wear resistance of the control group, the test sample of the present invention has significant advantages.

Detailed ways

The essence and features of the present invention will be described below in conjunction with the examples and comparative examples. The given examples are only used to explain the present invention and are not intended to limit the scope of the present invention.

Example 1:

Preparation of yellow color paste: Weigh 800g of alicyclic glycidyl ether epoxy resin CER-170, 200g of chrome yellow pigment in the coating, mix and moisten with a shovel; adjust the gap between the sticks of the three-roll mill, and pass the mixture three times , to obtain a yellow paste.

Preparation of component A:

Weigh phenolic epoxy resin PNE-172250g, cycloaliphatic glycidyl ether epoxy resin CER-17060g, epoxy resin toughening agent CYH-27750g, add to the 2L planetary disperser, heat to the glue temperature while stirring Stir at medium speed for 15 minutes at 70°C, add epoxy diluent 1,2-hexanediol diglycidyl ether CD-118050g, add 4g of organic bentonite, stir and disperse for 30 minutes; add 50g of 3000 mesh activated kaolin; add 1000 mesh white 400g of corundum powder, stirred at high speed for 30 minutes; added 50g of chopped glass fiber, stirred at medium speed for 10 minutes, cooled to 40°C and controlled the temperature, added 10g of coupling agent KH560, 3g of antioxidant, 5g of ultraviolet absorber, medium Stir at high speed for 15 minutes; add 50g of yellow paste (including 40g of CER-170, the same below), 18g of white carbon black, and disperse with high-speed stirring for 20 minutes; vacuumize and stir at low speed for 30 minutes, filter and discharge (total amount 1Kg).

Preparation of component B:

Weigh 200g of cycloaliphatic amine, 150g of isophorone diamine, 90g of aminoethylpiperazine, 20g of 2,4,6-tris(dimethylaminomethyl)phenol, 6g of organobentonite in 2L biscuit Planetary power mixing kettle, stir at medium speed for 30 minutes; add 44g of 3000 mesh kaolin, 400g of 1000 mesh white corundum, and stir at high speed for 15 minutes; add 50g of chopped glass fiber, stir at medium speed for 10 minutes, add 40g of white carbon black, and stir at high speed for 20 hours ; Vacuumize and stir at a low speed for 30 minutes, discharging (total amount 1Kg);

Adhesive use:

Use an electric mixer to stir component A for 3 minutes, weigh in proportion, weigh components A and B in a ratio of 100:18, mix with the mixer for 5 minutes (or mix evenly with a shovel), and place it on the sizing surface. The toothed scraper of corresponding specifications is selected for the thickness, the scraping is smooth, and it is cured at room temperature for more than 24 hours.

Example 2:

Preparation of yellow color paste: (with embodiment 1)

Preparation of component A:

Weigh 200g of phenolic epoxy resin PNE-172, 120g of cycloaliphatic glycidyl ether epoxy resin CER-170, and 40g of epoxy resin toughening agent CYH-277, and add them to a 2L planetary disperser, and heat until glued together while stirring. Liquid temperature is 70°C, stirring at medium speed for 15 minutes, adding epoxy diluent 1,2-hexanediol diglycidyl ether CD-1180 40g, adding organic bentonite 6g, stirring and dispersing for 30 minutes; adding 3000 mesh active treatment kaolin 30g; Add 439g of 1000 mesh white corundum powder, stir and disperse at high speed for 30 minutes; add 40g of chopped glass fiber, stir and disperse at medium speed for 10 minutes, cool down to 40°C and control the temperature, add 12g of coupling agent KH560, 4g of antioxidant, and UV absorber 4g, stir at medium speed for 15 minutes; add 50g of yellow paste and 15g of white carbon black, stir and disperse at high speed for 20 minutes; vacuumize and stir at low speed for 30 minutes, filter and discharge (total amount 1Kg).

B component preparation:

Weigh 250g of alicyclic amine, 100g of isophorone diamine, 60g of aminoethylpiperazine, 26g of 2,4,6-tris(dimethylaminomethyl)phenol, 4g of organic bentonite in 2L biscuit Planetary power mixing kettle, stirring at medium speed for 30 minutes; adding 40g of 3000 mesh kaolin, 420g of 1000 mesh white corundum, stirring at high speed for 15 minutes; adding 50g of chopped glass fiber, stirring at medium speed for 10 minutes, adding 50g of white carbon black, stirring at high speed for 20 hours ; Vacuumize and stir at a low speed for 30 minutes, discharging (total amount 1Kg);

Adhesive use:

Use an electric mixer to stir component A for 3 minutes, weigh in proportion, weigh components A and B in a ratio of 100:21, mix with the mixer for 5 minutes (or mix evenly with a shovel), and place it on the sizing surface. The toothed scraper of corresponding specifications is selected for the thickness, the scraping is smooth, and it is cured at room temperature for more than 24 hours.

Example 3:

Preparation of yellow color paste: (with embodiment 1)

A component preparation:

Weigh 150g of phenolic epoxy resin PNE-172, 160g of cycloaliphatic glycidyl ether epoxy resin CER-170, and 40g of epoxy resin toughening agent QS-BN, add them to a 2L planetary disperser, and heat to the glue while stirring Stir at a medium speed for 15 minutes at a temperature of 70°C, add 40g of epoxy diluent 1,2-hexanediol diglycidyl ether CD-1180, add 8g of organic bentonite, stir and disperse for 30 minutes; add 50g of 3000 mesh activated kaolin; add 1000 mesh white corundum powder 418g, high-speed stirring and dispersing for 30 minutes; add chopped glass fiber 60g, medium-speed stirring and dispersing for 10 minutes, cool down to 40°C and control the temperature, add coupling agent KH560 5g, antioxidant 3g, UV absorber 6g , stirred at a medium speed for 15 minutes; added 50 g of yellow paste and 10 g of white carbon black, and stirred at a high speed to disperse for 20 minutes; vacuumized and stirred at a low speed for 30 minutes, filtered, and discharged (1Kg in total).

B component preparation:

Weigh 240g of alicyclic amine, 100g of isophoronediamine, 90g of aminoethylpiperazine, 30g of 2,4,6-tris(dimethylaminomethyl)phenol, 5g of organic bentonite in 2L biscuit Planetary power mixing kettle, stir at medium speed for 30 minutes; add 40g of 3000 mesh kaolin, 405g of 1000 mesh white corundum, and stir at high speed for 15 minutes; add 40g of chopped glass fiber, stir at medium speed for 10 minutes, add 50g of white carbon black, and stir at high speed for 20 hours ; Vacuumize and stir at a low speed for 30 minutes, discharging (total amount 1Kg);

Adhesive use:

Use an electric mixer to stir component A for 3 minutes, weigh in proportion, weigh components A and B in a ratio of 100:22, mix with the mixer for 5 minutes (or mix evenly with a shovel), place it on the sizing surface, and according to the coating The toothed scraper of corresponding specifications is selected for the thickness, the scraping is smooth, and it is cured at room temperature for more than 24 hours.

Example 4:

Preparation of yellow color paste: (with embodiment 1)

A component preparation:

Weigh novolac epoxy resin PNE-172 180g, alicyclic glycidyl ether epoxy resin CER-170103g, epoxy resin toughening agent CYH-277 60g, add them to a 2L planetary disperser, and heat until glued together while stirring. Liquid temperature is 70°C, stirring at medium speed for 15 minutes, adding epoxy diluent 1,2-hexanediol diglycidyl ether CD-1180 50g, adding organic bentonite 8g, stirring and dispersing for 30 minutes; adding 3000 mesh active treated kaolin 30g; Add 450g of 1000 mesh white corundum powder, stir and disperse at high speed for 30 minutes; add 40g of chopped glass fiber, stir and disperse at medium speed for 10 minutes, cool down to 40°C and control the temperature, add 7g of coupling agent KH560, 6g of antioxidant, and UV absorber 8g, stir at medium speed for 15 minutes; add 50g of yellow paste and 10g of white carbon black, stir and disperse at high speed for 20 minutes; vacuumize and stir at low speed for 30 minutes, filter and discharge (total amount 1Kg).

B component preparation:

Weigh 214g of cycloaliphatic amine, 125g of isophorone diamine, 70g of aminoethylpiperazine, 25g of 2,4,6-tris(dimethylaminomethyl)phenol, 6g of organic bentonite in 2L biscuit Planetary power mixing kettle, stir at medium speed for 30 minutes; add 40g of 3000 mesh kaolin, 450g of 1000 mesh white corundum, and stir at high speed for 15 minutes; add 40g of chopped glass fiber, stir at medium speed for 10 minutes, add 30g of white carbon black, and stir at high speed for 20 hours ; Vacuumize and stir at a low speed for 30 minutes, discharging (total amount 1Kg);

Adhesive use:

Use an electric mixer to stir component A for 3 minutes, weigh in proportion, weigh components A and B in a ratio of 100:20, mix with the mixer for 5 minutes (or mix evenly with a shovel), and place it on the sizing surface. The toothed scraper of corresponding specifications is selected for the thickness, the scraping is smooth, and it is cured at room temperature for more than 24 hours.

Example 5:

Preparation of yellow color paste: (with embodiment 1)

A component preparation:

Weigh 210g of phenolic epoxy resin PNE-172, cycloaliphatic glycidyl ether epoxy resin CER-17080g, and epoxy resin toughening agent QS-BN60g, add them to a 2L planetary disperser, and heat to the glue while stirring Stir at a medium speed for 15 minutes at a temperature of 70°C, add 60g of epoxy diluent 1,2-hexanediol diglycidyl ether CD-1180, add 7g of organic bentonite, stir and disperse for 30 minutes; add 35g of 3000 mesh activated kaolin; add 1000 mesh white corundum powder 420g, high-speed stirring and dispersing for 30 minutes; add chopped glass fiber 50g, medium-speed stirring and dispersing for 10 minutes, cool down to 40°C and control the temperature, add coupling agent KH560 8g, antioxidant 4g, UV absorber 6g , stirred at a medium speed for 15 minutes; added 50 g of yellow paste and 20 g of white carbon black, and stirred at a high speed to disperse for 20 minutes; vacuumized and stirred at a low speed for 30 minutes, filtered and discharged (total amount 1Kg).

B component preparation:

Weigh 220g of cycloaliphatic amine, 120g of isophorone diamine, 75g of aminoethylpiperazine, 21g of 2,4,6-tris(dimethylaminomethyl)phenol, 6g of organobentonite in 2L biscuit Planetary power mixing kettle, stir at medium speed for 30 minutes; add 60g of 3000 mesh kaolin, 400g of 1000 mesh white corundum, and stir at high speed for 15 minutes; add 60g of chopped glass fiber, stir at medium speed for 10 minutes, add 40g of white carbon black, and stir at high speed for 20 hours ; Vacuumize and stir at a low speed for 30 minutes, discharging (total amount 1Kg);

Adhesive use:

Use an electric mixer to stir component A for 3 minutes, weigh in proportion, weigh components A and B in a ratio of 100:19, mix with the mixer for 5 minutes (or mix evenly with a shovel), and place it on the sizing surface. The toothed scraper of corresponding specifications is selected for the thickness, the scraping is smooth, and it is cured at room temperature for more than 24 hours.

Comparative example:

Preparation of yellow color paste: Weigh 800g of bisphenol A epoxy resin E-51, 200g of chrome yellow pigment in the coating, mix and moisten with a shovel; adjust the gap between the rollers of the three-roll mill, pass the mixture three times to obtain yellow color paste.

A component preparation:

Weigh 320g of bisphenol A epoxy resin E-51 and 50g of epoxy resin toughening agent QS-BN, add them to a 2L planetary disperser, heat to the temperature of the glue solution while stirring, stir for 15 minutes at a medium speed, add Epoxy diluent 1, 50g of 6-hexanediol diglycidyl ether, add 5g of organic bentonite, stir and disperse for 30 minutes; add 37g of 3000 mesh active treated kaolin; add 450g of 1000 mesh white corundum powder, stir and disperse at high speed for 30 minutes; add chopped 60g of glass fiber, stirred at medium speed for 10 minutes, cooled to 40°C and controlled the temperature, added 10g of coupling agent KH560, 3g of antioxidant, 5g of UV absorber, stirred at medium speed for 15 minutes; added 50g of yellow paste (containing E -51 epoxy resin 40g), white carbon black 10g, high-speed stirring and dispersing for 20 minutes; vacuumize and low-speed stirring for 30 minutes, filter and discharge (total amount 1Kg).

B component preparation:

(prepared with the component of embodiment 4B)

Adhesive use:

Use an electric mixer to stir component A for 3 minutes, weigh in proportion, weigh components A and B in a ratio of 100:20, mix with the mixer for 5 minutes (or mix evenly with a shovel), and place it on the sizing surface. The toothed scraper of corresponding specifications is selected for the thickness, the scraping is smooth, and it is cured at room temperature for more than 24 hours.

The wear-resistant, weather-resistant epoxy coating adhesives prepared in the above-mentioned examples 1-5 and comparative examples were subjected to mechanical performance test, relative wear rate test, glass transition temperature test and ultraviolet artificial accelerated aging test according to the adhesive test standard , the data are shown in Table 1, Table 2, and Table 3.

1, embodiment and comparative example mechanical performance test contrast, see table 1

Table 1

Note *: It is 45# steel-45# steel sandblasting test piece.

Note**: The body casting sample is cured at room temperature for 168 hours

2. The abrasion resistance test and glass transition temperature (Tg) of the examples and comparative examples are compared in Table 2

Table 2

Note*: Casting paddle-type specimens are used, 60% 30# silicon carbide-water, 200 rpm for 72 hours continuously.

3. Examples and comparative examples are compared according to GB/T14522-93 ultraviolet light and climate resistance artificial accelerated aging test, see Table 3

table 3

Note*: Fluorescent UV lamp test chamber is used, 313nmUVB, 50-60°C condensation-lighting are each 4-hour cycle.

Through above-mentioned embodiment and comparative example test, test data comparison, embodiment has remarkable comprehensive performance, especially after ultraviolet artificial accelerated aging test, embodiment sample still has good tensile strength, and comparative example sample, The appearance has been whitened and powdered, and the mechanical properties have been seriously attenuated.

The present invention adopts the combination of novolak epoxy resin, alicyclic epoxy resin and cyclohexanediol diglycidyl ether diluent, and adopts the combination of alicyclic amine curing agent with high reactivity to make the prepared epoxy coating Layer glue has: low viscosity, good construction performance; normal temperature curing, high bonding performance and mechanical strength after curing; phenolic epoxy, alicyclic epoxy resin and alicyclic amine curing system provide high crosslinking Density, so that the coating has good wear resistance and impact resistance; especially the wear-resistant and weather-resistant epoxy resin coating adhesive of the present invention has outstanding ultraviolet radiation resistance and weather resistance, and is suitable for outdoor marking lines, protection In terms of coating application, it has significant and substantial characteristics.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within range.

Claims (4)

1. wear-resistant, a weathe resistance epoxy resin coating adhesive is processed by epoxy resin ingredient that is referred to as the A component and the curing agent component that is referred to as the B component, and the weight ratio of A component and B component is 100: 18～22, it is characterized in that:

Described A component comprise weight part for 6-16 part alicyclic tetraglycidel ether epoxy resin, the novolac epoxy of 15-25 part, the epoxy active diluent of 4-6 part, the reactive toughner of 4-6 part, the coupling agent of 0.5-1.2 part, the organobentonite of 0.4-0.8 part, the oxidation inhibitor of 0.3-0.5 part, the UV light absorber of 0.4-0.8 part, the white alundum powder of 40-45 part, the filler powder of 3-5 part, the short glass fiber of 4-6 part, 5 parts yellow color and the WHITE CARBON BLACK of 1-2 part;

Described B component comprises that weight part is the aliphatic cyclic amine of 15-25 part, the isophorone diamine of 10-15 part, the aminoethyl piperazine of 6-9 part, the curing catalyst of 2-3 part, the white alundum powder of 40-45 part, the short glass fiber of 4-6 part, the filler powder of 4-6 part and the WHITE CARBON BLACK of 3-5 part.

2. a kind of wear-resistant, weathe resistance epoxy resin coating adhesive according to claim 1 is characterized in that described alicyclic glycidyl ether is to contain wherein a kind of of the saturated fat ring structure of two epoxy group(ing) and alicyclic glycidyl ether that oxirane value is 0.45-0.55; Described novolac epoxy is that line style phenolic aldehyde polyglycidyl ether and epoxy equivalent (weight) are the liquid phenolic epoxy resin of 165-175g/eq; Described epoxide resin reactive diluent is that oxirane value is 1 of 0.50～0.60eq/100g, the 2-cylohexanediol diglycidyl ether; Described reactive toughner be meant have branched structure, epoxide resin reactive toughner many active end groups flexibility compound or that solidify to divide the elastic granule disperse phase that coordinates; Described coupling agent is the silane coupling agent that contains epoxy functionality, comprises γ-glycidyl ether oxygen propyl trimethoxy silicane or γ-methacryloxypropyl trimethoxy silane; Described organobentonite is 200 order organobentonite dry powder through surface-active-treatment; Described oxidation inhibitor is Hinered phenols 2,6-tri-tert-4-methylphenol or four [methyl-β-(3, the 5-di-tert-butyl-hydroxy phenyl) propionic ester] pentaerythritol ester; 5 parts of yellow colors were meant by 4 parts of cycloaliphatic epoxy resins and 1 part of prefabricated forming of coating medium chrome yellow medium yellow pigment during described A component was formed; Described UV light absorber is the UV light absorber of benzotriazole category, comprises 2-(2 '-hydroxyl-3 ', 5 '-two uncle's phenyl)-5-chlorination benzotriazole.

3. a kind of wear-resistant, weathe resistance epoxy resin protective coating glue according to claim 1; It is characterized in that described aliphatic cyclic amine is that hydrogenation m-xylene diamine or the reactive hydrogen equivalent of 35.5g/Eq is 1 of 35.5g/Eq for the reactive hydrogen equivalent, two (aminomethyl) hexanaphthenes of 4-; Described isophorone diamine be meant the reactive hydrogen equivalent be 42.6g/Eq aliphatic cyclic amine; Described aminoethyl piperazine is meant that the reactive hydrogen equivalent is the aliphatic cyclic amine of 15g/Eq; Described curing catalyst is a tertiary amines promotor 2,4, the 6-tri(dimethylaminomethyl)phenol; Described white alundum powder is commercially available abrasive material level 1000# white alundum powder with trigonal system; Described filler powder be meant powder surface through coupling agent active handle, finely disseminated 1000 orders calcining α-AL in resin and curing component ₂0 ₃Powder or 3000 order calcined kaolins; Described short glass fiber is meant that fine footpath is at 8-12um, the length short glass fiber powder less than 0.5mm; Described WHITE CARBON BLACK is meant that specific surface area is 200M ²The fumed silica of/g.

4. prepare the method for described a kind of wear-resistant, the weathe resistance epoxy resin protective coating glue of claim 1, comprise yellow color preparation method, A method for preparing ingredients thereof and B method for preparing ingredients thereof:

Yellow color preparation method comprises:

1) takes by weighing alicyclic tetraglycidel ether epoxy resin, coating medium chrome yellow medium yellow pigment, mix wetting with scoop;

2) roller is crossed three times with compound in adjustment three-roll grinder rod gap, gets yellow color.

The A method for preparing ingredients thereof comprises:

1) novolac epoxy, alicyclic tetraglycidel ether epoxy resin, reactive toughner are placed planetary dispersion machine, be heated to 70 ℃ of glue temperatures;

2) added epoxide resin reactive diluent, organobentonite dispersed with stirring 30 minutes;

3) add filler powder, the dispersion of white alundum powder high-speed stirring 30 minutes;

4) add short glass fiber, dispersed with stirring 10 minutes is cooled to 40 ℃ and temperature control;

5) adding coupling agent, oxidation inhibitor, uv-absorbing agent stirred 15 minutes;

6) add yellow color, WHITE CARBON BLACK, high-speed stirring was disperseed 20 minutes;

7) vacuumize and stirring at low speed 30 minutes;

8) filtration, discharging;

The B method for preparing ingredients thereof comprises:

1) aliphatic cyclic amine, isophorone diamine, aminoethyl piperazine, curing catalyst are placed planetary dispersion machine, dispersed with stirring 10 minutes;

2) add organobentonite, dispersed with stirring 30 minutes;

3) temperature control is 50 ℃, adds filler powder, white alundum powder, dispersed with stirring 20 minutes;

4) add short glass fiber, dispersed with stirring 10 minutes;

5) add WHITE CARBON BLACK, dispersed with stirring 20 minutes vacuumizes and stirring at low speed 30 minutes;

6) filter discharging.