CN112708382A

CN112708382A - Rock plate back net reinforcing adhesive and preparation method thereof

Info

Publication number: CN112708382A
Application number: CN202011599235.9A
Authority: CN
Inventors: 钟雪琴; 万如意; 何伟; 祝蓓; 郑保昌
Original assignee: Hunan Kosen New Material Co ltd
Current assignee: Hunan Kosen New Material Co ltd
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2021-04-27

Abstract

The invention discloses a rock back mesh reinforcing adhesive and a preparation method thereof, belonging to the technical field of new materials, wherein the rock back mesh reinforcing adhesive comprises a component A and a component B, wherein the component A and the component B are used in a matching way according to the volume ratio of 100: 45-55; the component A comprises the following raw material components in parts by weight: 50-80 parts of epoxy resin; 1-3 parts of a coupling agent; 3-10 parts of a toughening agent; 0.5-2 parts of an anti-aging auxiliary agent; the component B comprises the following raw material components in parts by weight: 20-30 parts of dendritic amine curing agent; 15-25 parts of modified polyamide curing agent. The preparation method comprises the following steps: s1, weighing; s2, preparing a component A; s3, preparing a component B. The rock back mesh reinforcing adhesive has good dimensional stability and excellent adhesive force, and the adhesive layer also has good impact strength.

Description

Rock plate back net reinforcing adhesive and preparation method thereof

Technical Field

The invention relates to the technical field of new materials, in particular to a rock back mesh reinforcing adhesive and a preparation method thereof.

Background

The ceramic rock plate is made of natural raw materials through a special process, is pressed by a press with the help of more than ten thousand tons (more than 15000 tons), is combined with an advanced production technology, is fired at a high temperature of more than 1200 ℃, and can withstand the processing procedures of cutting, drilling, polishing and the like. The ceramic rock plate is mainly used in the field of household and kitchen plates. As a new species in the field of home furnishing, compared with other home furnishing products, the rock plate home furnishing has the characteristics of large specification, strong plasticity, various colors, high temperature resistance, abrasion resistance, seepage prevention, acid and alkali resistance, zero formaldehyde, environmental protection, health and the like.

In order to reduce the damage of the ceramic rock plate during the transportation, the subsequent reprocessing and the use, and improve the decorative effect of the surface of the product, the ceramic rock plate is generally required to be subjected to treatments such as back screening, front glue scraping, defect repairing and the like. The adhesive is used for reinforcing the back net of the ceramic rock plate, and the performance of the adhesive directly influences the quality of the ceramic rock plate and even endangers the safety of buildings. The back-screening process of ceramic rock boards generally comprises a reinforcing procedure of covering a layer of fiber mesh on the back surface of a rock board and uniformly coating an adhesive on the whole back surface of a stone material.

The traditional ceramic rock plate back-screening process adopts unsaturated resin adhesive for back-screening in a large quantity. The unsaturated resin adhesive is prepared by dissolving a linear high molecular compound formed by condensation polymerization of saturated or unsaturated dibasic acid and dihydric alcohol in a monomer (generally referred to as styrene), and is also called as unsaturated polyester resin. Unsaturated polyester resins are thermosetting resins that cure to a high molecular weight network polymer when exposed to heat or an initiator. When the unsaturated resin adhesive is used for the back net of the rock plate, the following defects are mainly present:

1. the adhesive is only coated on the surface of the stone without permeation effect, does not play a role in strengthening the essence of the stone, and plates with the thickness of 12mm and less than 12mm made of unsaturated resin are extremely easy to break in the process of grinding and polishing, and are also made into large-sized plates.

2. The bonding force between the unsaturated resin adhesive and the stone is poor, and the unsaturated resin adhesive is easy to fall off in the processing process to cause the damage of the board surface;

3. for wet mounting, when the large plate is mounted, a layer of isolation is formed between the large plate and mortar due to the back net, and the affinity of the unsaturated resin adhesive and cement is poor, so that the bonding strength of the stone and a wall surface or a ground is greatly reduced, and a plurality of pathological changes such as hollowing, water spots and the like in the later period of the stone are caused. Therefore, in order to reduce or avoid the pathological changes, the back net is generally shoveled off when the back net is installed in a wet mode, so that the construction cost is increased, and the damage rate of the stone net is increased;

4. the unsaturated resin adhesive needs to be additionally added with an initiator, an accelerant, a diluent and the like in the using process, and the substances are toxic substances with strong pungent odor, so that the unsaturated resin adhesive is not beneficial to the operation of workers and environmental protection.

In view of the above, the invention provides a back mesh reinforcing adhesive suitable for a 3mm rock plate and a preparation method thereof.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a rock back mesh reinforcing adhesive and a preparation method thereof, wherein the reinforcing adhesive has good dimensional stability and excellent adhesive force, and the adhesive layer has good impact strength and does not influence the later installation and paving.

In order to achieve the purpose, the invention provides the following technical scheme:

a rock back mesh reinforcing adhesive comprises a component A and a component B, wherein the component A and the component B are used in a matching way according to the volume ratio of 100: 45-55;

the component A comprises the following raw material components in parts by weight: 50-80 parts of epoxy resin; 1-3 parts of a coupling agent; 3-10 parts of a toughening agent; 0.5-2 parts of an anti-aging auxiliary agent;

the component B comprises the following raw material components in parts by weight: 20-30 parts of dendritic amine curing agent; 15-25 parts of modified polyamide curing agent.

More preferably: the component A and the component B are matched according to the volume ratio of 100: 50:

the component A comprises the following raw material components in parts by weight: 60 parts of epoxy resin; 2 parts of a coupling agent; 5 parts of a toughening agent; 1 part of an anti-aging auxiliary agent;

the component B comprises the following raw material components in parts by weight: 25 parts of dendritic amine curing agent; 20 parts of modified polyamide curing agent.

More preferably: the epoxy resin is one or more of standard bisphenol A epoxy resin 128R, low-viscosity modified bisphenol A epoxy resin 816 and bisphenol F epoxy resin 862.

More preferably: the epoxy resin is prepared from bisphenol F epoxy resin 862 and low-viscosity modified bisphenol A epoxy resin 816 according to the weight ratio of 1:1 is prepared by compounding.

More preferably: the toughening agent is one or more of polyether polyol (PPG with molecular weight of 2000), carboxyl-terminated hyperbranched polyester (CYH-227) and nano core-shell rubber (MX).

More preferably: the coupling agent is a silane coupling agent and is one or more of KH602, KH551, KH792 and KH 560.

More preferably: the anti-aging auxiliary agent is prepared from a hindered phenol antioxidant and a hindered amine stabilizer according to the mass ratio of 1: 20.

More preferably: the modified polyamide curing agent adopts one or two of a curing agent V140 and a curing agent XH 429;

and/or the dendritic amine curing agent is dendritic integral polyamide-amine.

A preparation method of a rock plate back mesh reinforcing adhesive comprises the following steps:

s1, weighing: weighing epoxy resin, a coupling agent, a toughening agent, an anti-aging auxiliary agent, a dendritic amine curing agent and a modified polyamide curing agent according to the weight parts of the rock back mesh reinforcing adhesive;

s2, preparation of the component A: adding epoxy resin, a coupling agent, a toughening agent and an anti-aging auxiliary agent into a reaction kettle, stirring at 40-55 ℃, and vacuumizing to-0.1 Mpa in the stirring process; keeping vacuum high-speed stirring at 1500-2000r/min, stirring for 1-2.5h, then carrying out heat preservation and ultrasonic dispersion for 45min, and then cooling to 20-40 ℃ for defoaming to obtain a component A;

s3, preparation of a component B: adding the dendritic amine curing agent and the modified polyamide curing agent into a reaction kettle, stirring at 40-55 ℃, and vacuumizing to-0.1 Mpa in the stirring process; keeping vacuum high-speed stirring at 1500-2000r/min, stirring for 1-2.5h, then preserving heat, ultrasonically dispersing for 45min, and then cooling to 20-40 ℃ for defoaming to obtain the component B.

More preferably: the reaction kettle comprises a kettle body, a jacket, a motor, an ultrasonic transducer, an inner cylinder and a stirring mechanism;

the jacket is sleeved on the surface of the kettle body, the motor and the ultrasonic transducer are both installed at the top of the kettle body, the inner cylinder is located in the kettle body, the upper end and the lower end of the inner cylinder are both provided with openings, a connecting rod is fixed between the inner cylinder and the kettle body, the inner cylinder is fixed in the kettle body through the connecting rod, and the side wall of the inner cylinder is provided with a through hole;

the stirring mechanism comprises a main shaft, a pushing mechanism and a stirring paddle, the main shaft is connected with the motor output shaft, the main shaft is vertically arranged, the central shaft is overlapped with the central shafts of the kettle body and the inner barrel, the pushing mechanism comprises a spiral groove, a circular groove, a push plate, a sleeve and a sliding block, the spiral groove is formed in the circumferential surface of the main shaft along the axial direction of the main shaft, the circular groove is formed in the circumferential surface of the main shaft and communicated with the spiral groove, the circular groove is located at the upper end of the spiral groove, the sleeve is sleeved on the main shaft, the sliding block is fixed on the inner surface of the sleeve and embedded in the spiral groove, and the sliding block is used for sliding in the spiral groove and;

the push plate is fixed on the sleeve and is in contact with the inner side of the inner barrel, a notch is formed in the push plate, a guide plate matched with the notch is fixed on the inner side of the inner barrel, the guide plate is inserted into the notch, and the stirring paddle is fixed on the main shaft.

In conclusion, the invention has the following beneficial effects: the epoxy adhesive is basically odorless, no small molecular substance is released in the curing process, the glue has good dimensional stability and excellent adhesive force, the glue layer also has good impact strength, and the later installation and paving are not affected. The reinforcing glue for the back net of the rock plate mainly has the following characteristics:

1. the rock plate has better compression shear strength, tensile strength and the like, and can enhance the impact resistance and the breaking strength of the rock plate;

2. the size stability is good, the curing time is short, and the shrinkage is not generated in the curing process;

3. the adhesive force is good, and the adhesive strength between the back net and the rock plate is improved;

4. the method has the advantages that the rock plate installation cannot be influenced, when the paving is carried out, the rock plate back screen is coated with a layer of ceramic tile back glue, and then the ceramic tile back glue is bonded with the wall body through cement mortar.

Drawings

FIG. 1 is a block flow diagram of an embodiment, which is mainly used for embodying a method for preparing a reinforcing adhesive for a rock back net;

FIG. 2 is a schematic structural diagram of an embodiment, which is mainly used for embodying the internal structure of a reaction kettle;

FIG. 3 is a partial schematic structural view of the embodiment, mainly used for embodying the structure of the pushing mechanism;

fig. 4 is a partially sectional schematic view of the embodiment, mainly used for embodying the structure of the pushing mechanism.

In the figure, 1, a kettle body; 2. a jacket; 3. a motor; 4. an ultrasonic transducer; 5. an inner barrel; 6. a through hole; 7. a guide plate; 8. a connecting rod; 91. a main shaft; 92. a pushing mechanism; 921. a helical groove; 922. a circular groove; 923. pushing the plate; 924. a notch; 925. a sleeve; 926. a slider; 93. a stirring paddle; 94. a support bar; 10. a feeding pipe orifice; 11. a discharge pipe orifice; 12. a heat exchange medium inlet; 13. a heat exchange medium outlet; 14. supporting a lug; 15. a manhole.

Detailed Description

The invention is described in detail below with reference to the figures and examples.

Example 1: a rock back mesh reinforcing adhesive and a preparation method thereof are provided, the rock back mesh reinforcing adhesive comprises a component A and a component B, the component A and the component B are used in a matching way according to the volume ratio of 100: 50: the formula of the component A is as follows: 60g of epoxy resin; 2g of coupling agent; 5g of toughening agent; 1g of an anti-aging auxiliary agent; the formula of the component B is as follows: 25g of dendritic amine curing agent; 20g of modified polyamide curing agent.

In the formula of the component A, the epoxy resin is bisphenol F epoxy resin 862 and low-viscosity modified bisphenol A epoxy resin 816 according to the weight ratio of 1:1 is compounded; the toughening agent is polyether polyol (PPG with molecular weight of 2000); the coupling agent is silane coupling agent KH 602; the anti-aging auxiliary agent is prepared from a hindered phenol antioxidant and a hindered amine stabilizer according to the mass ratio of 1: 20.

In the formula of the component B, the modified polyamide curing agent is curing agent V140; the dendritic amine curing agent is dendritic integral polyamide-amine.

The preparation method, as shown in figure 1, comprises the following steps:

s1, weighing: respectively weighing epoxy resin, a coupling agent, a toughening agent, an anti-aging auxiliary agent, a dendritic amine curing agent and a modified polyamide curing agent according to the formula of the component A and the formula of the component B;

s2, preparation of the component A: adding epoxy resin, a coupling agent, a toughening agent and an anti-aging auxiliary agent into a reaction kettle, stirring at 50 ℃, and vacuumizing to-0.1 Mpa in the stirring process; keeping vacuum high-speed stirring for 1800r/min, stirring for 2h, then preserving heat, ultrasonically dispersing for 45min, and then cooling to 25 ℃ for defoaming to obtain a component A;

s3, preparation of a component B: adding the dendritic amine curing agent and the modified polyamide curing agent into a reaction kettle, stirring at 50 ℃, and vacuumizing to-0.1 Mpa in the stirring process; keeping vacuum and stirring at a high speed of 1800r/min, stirring for 2h, then preserving heat, ultrasonically dispersing for 45min, and then cooling to 25 ℃ for defoaming to obtain a component B.

As the cured epoxy resin has high brittleness, the toughening agent is selected to toughen the cured epoxy resin system, and the balance between the toughness and the mechanical property is strived to be achieved. The epoxy resin containing two or more epoxy groups is reacted with a curing agent to form a three-dimensional cross-linked network structure compound, and for this reason, the epoxy resin of this embodiment is composed of bisphenol F epoxy resin 862 and low-viscosity modified bisphenol a epoxy resin 816 in a weight ratio of 1:1 is prepared by compounding.

Referring to fig. 2-4, in the preparation process of the rock back mesh reinforcing adhesive, the reaction kettle comprises a kettle body 1, a jacket 2, a motor 3, an ultrasonic transducer 4, an inner cylinder 5 and a stirring mechanism. The kettle body 1 is cylindrical, the jacket 2 is sleeved on the surface of the kettle body 1, the jacket 2 is provided with a heat exchange medium inlet 12 and a heat exchange medium outlet 13, the heat exchange medium inlet 12 is positioned at the lower part of the jacket 2, and the heat exchange medium outlet 13 is positioned at the upper part of the jacket 2. The heat exchange medium can be a heat medium or a cold medium. The motor 3 and the ultrasonic transducer 4 are both arranged at the top of the kettle body 1, the motor 3 is positioned at the center of the top of the kettle body 1, and the ultrasonic transducer 4 is positioned at one side of the top of the kettle body 1. The ultrasonic transducer 4 is a conventional transducer, and its specific structure and operation principle are not described herein. The top of the kettle body 1 is also provided with a manhole 15 and a feeding pipe opening 10, the manhole 15 and the feeding pipe opening 10 are respectively positioned at two opposite sides of the motor 3, and the center of the bottom of the kettle body 1 is provided with a discharging pipe opening 11. The lateral part of the kettle body 1 is welded with the support lugs 14, and the support lugs 14 are arranged on two opposite sides of the kettle body 1.

Referring to fig. 2-4, the inner cylinder 5 is positioned in the kettle body 1, the upper end and the lower end of the inner cylinder are both provided with openings, a connecting rod 8 is fixed between the inner cylinder 5 and the kettle body 1, and the inner cylinder 5 is fixed in the kettle body 1 through the connecting rod 8. In order to stably fix the inner cylinder 5 in the kettle body 1, preferably, the connecting rods 8 are arranged in an upper group and a lower group, each group is provided with a plurality of connecting rods 8, and the connecting rods 8 are wound around the inner cylinder 5. A plurality of through holes 6 are formed in the side wall of the inner cylinder 5, and the through holes 6 are uniformly distributed around the inner cylinder 5. The stirring mechanism comprises a main shaft 91, a pushing mechanism 92, a stirring paddle 93 and a supporting rod 94. The main shaft 91 is vertically arranged, the upper end of the main shaft is connected with the output shaft of the motor 3, and the lower end of the main shaft extends downwards and is close to the bottom in the kettle body 1. The stirring paddle 93 is fixed at the lower extreme of main shaft 91, and specifically, the bracing piece 94 upper end is fixed with main shaft 91 lower extreme, and the lower extreme is fixed with stirring paddle 93 to make stirring paddle 93 be connected with main shaft 91 through bracing piece 94.

Referring to fig. 2-4, the main shaft 91 is vertically arranged, the central axis of the main shaft coincides with the central axes of the kettle body 1 and the inner cylinder 5, two pushing mechanisms 92 are arranged, and the two pushing mechanisms 92 are vertically arranged on the main shaft 91. The pushing mechanism 92 includes a spiral groove 921, an annular groove 922, a push plate 923, a sleeve 925, and a slider 926. The spiral groove 921 is opened on the main shaft 91 circumferential surface along the main shaft 91 axial direction, and the annular groove 922 is opened on the main shaft 91 circumferential surface and is communicated with the spiral groove 921, and the annular groove 922 is located the spiral groove 921 upper end. The sleeve 925 is sleeved on the main shaft 91, the sliding block 926 is fixed on the inner surface of the sleeve 925 and embedded in the spiral groove 921, and the sliding block 926 is used for sliding in the spiral groove 921 and the circular groove 922. Push pedal 923 is fixed on sleeve 925 and with the inboard contact of inner tube 5, in order to prevent push pedal 923 at the 5 internal rotations of inner tube, specifically, breach 924 has been seted up on push pedal 923, and breach 924 sets up in the relative both sides of push pedal 923. The inner side of the inner cylinder 5 is fixed with a guide plate 7 matched with the gap 924, the guide plate 7 is inserted into the gap 924, and the guide plate 7 is vertically arranged.

In above-mentioned technical scheme, during the stirring, starter motor 3, so that main shaft 91 at the internal rotation of cauldron body 1, when main shaft 91 rotated, stirring rake 93 will be at the internal rotation of cauldron 1, thereby the internal misce bene of stirred tank, when main shaft 91 rotated in addition, slider 926 will slide in spiral groove 921, so that push pedal 923 reciprocates, after slider 926 moved the ring groove 922, push pedal 923 will not reciprocate, thereby keep moving the height position, when needing push pedal 923 to push down, restart motor 3, so that main shaft 91 reverses, slider 926 will follow ring groove 922 and slide into spiral groove 921 at this moment. When push pedal 923 reciprocated, push pedal 923 will promote the material in the inner tube 5 to make the inside and outside material of inner tube 5 fully mix, stir through stirring rake 93 simultaneously, have better stirring effect, accelerate reaction and compounding.

It should be noted that step S2 and step S3 are both performed in the reaction kettle, the temperature rise and fall is controlled by the heat exchange medium in the jacket, the ultrasonic dispersion is realized by the ultrasonic transducer 4, and the stirring is realized by the stirring mechanism.

Example 2: compared with the example 1, the rock back net reinforcing adhesive and the preparation method thereof are different in that the component A does not contain a coupling agent. The rest of the formulation, weight, preparation method, etc. are the same as example 1.

Example 3: the difference between the rock back mesh reinforcing adhesive and the preparation method thereof and the embodiment 1 is that the coupling agent in the component A is a silane coupling agent KH 550. The rest of the formulation, weight, preparation method, etc. are the same as example 1.

Example 4: the difference between the rock back mesh reinforcing adhesive and the preparation method thereof and the embodiment 1 is that the coupling agent in the component A is a silane coupling agent KH 560. The rest of the formulation, weight, preparation method, etc. are the same as example 1.

Example 5: the difference between the rock back mesh reinforcing adhesive and the preparation method thereof and the embodiment 1 is that the coupling agent in the component A is a silane coupling agent KH 551. The rest of the formulation, weight, preparation method, etc. are the same as example 1.

For examples 1-5, the effect of different types of coupling agents on the curing of the reinforcement glue was analyzed to give Table 1:

TABLE 1 curing Effect of different types of coupling agents on reinforcing gums

As shown in Table 1, the silane coupling agent KH602 is preferably used in the example 1 because the curing time of the reinforcing adhesive is the shortest and the initial tack strength is the greatest after 4 hours of curing.

Example 6: the difference between the rock back mesh reinforcing adhesive and the preparation method thereof and the embodiment 1 is that the epoxy resin is standard bisphenol A epoxy resin 128R. The rest of the formulation, weight, preparation method, etc. are the same as example 1.

Example 7: the difference between the rock back mesh reinforcing adhesive and the preparation method thereof and the embodiment 1 is that the epoxy resin is low-viscosity modified bisphenol A epoxy resin 816. The rest of the formulation, weight, preparation method, etc. are the same as example 1.

Example 8: the difference between the rock back mesh reinforcing adhesive and the preparation method thereof and the embodiment 1 is that the epoxy resin is bisphenol F epoxy resin 862. The rest of the formulation, weight, preparation method, etc. are the same as example 1.

For examples 1, 6-8, the effect of different epoxy systems on the curing of the reinforcement glue was analyzed and table 2 was obtained:

TABLE 2 curing Effect of different epoxy resin systems on the reinforcing glue

As can be seen from table 2, the compression shear strength, tensile strength, and the like of the epoxy resin obtained by compounding the bisphenol F epoxy resin 862 and the low-viscosity modified bisphenol a epoxy resin 816 are better than those of the epoxy resin of a single system.

Example 9: compared with the embodiment 1, the difference of the rock back mesh reinforcing adhesive and the preparation method thereof is that the epoxy resin is bisphenol F epoxy resin 862 and low-viscosity modified bisphenol A epoxy resin 816 are mixed according to the weight ratio of 1: 5 are compounded. The rest of the formulation, weight, preparation method, etc. are the same as example 1.

Example 10: compared with the embodiment 1, the difference of the rock back mesh reinforcing adhesive and the preparation method thereof is that the epoxy resin is bisphenol F epoxy resin 862 and low-viscosity modified bisphenol A epoxy resin 816 are mixed according to the weight ratio of 1: 4 are compounded. The rest of the formulation, weight, preparation method, etc. are the same as example 1.

Example 11: compared with the embodiment 1, the difference of the rock back mesh reinforcing adhesive and the preparation method thereof is that the epoxy resin is bisphenol F epoxy resin 862 and low-viscosity modified bisphenol A epoxy resin 816 are mixed according to the weight ratio of 1: 3 is prepared by compounding. The rest of the formulation, weight, preparation method, etc. are the same as example 1.

Example 12: compared with the embodiment 1, the difference of the rock back mesh reinforcing adhesive and the preparation method thereof is that the epoxy resin is bisphenol F epoxy resin 862 and low-viscosity modified bisphenol A epoxy resin 816 are mixed according to the weight ratio of 1:2 is prepared by compounding. The rest of the formulation, weight, preparation method, etc. are the same as example 1.

Example 13: compared with the embodiment 1, the difference of the rock back mesh reinforcing adhesive and the preparation method thereof is that the epoxy resin is bisphenol F epoxy resin 862 and low-viscosity modified bisphenol A epoxy resin 816 are mixed according to the weight ratio of 2: 1 is prepared by compounding. The rest of the formulation, weight, preparation method, etc. are the same as example 1.

Example 14: compared with the embodiment 1, the difference of the rock back mesh reinforcing adhesive and the preparation method thereof is that the epoxy resin is bisphenol F epoxy resin 862 and low-viscosity modified bisphenol A epoxy resin 816 are mixed according to the weight ratio of 3: 1 is prepared by compounding. The rest of the formulation, weight, preparation method, etc. are the same as example 1.

Example 15: compared with the embodiment 1, the difference of the rock back mesh reinforcing adhesive and the preparation method thereof is that the epoxy resin is bisphenol F epoxy resin 862 and low-viscosity modified bisphenol A epoxy resin 816 are mixed according to the weight ratio of 4: 1 is prepared by compounding. The rest of the formulation, weight, preparation method, etc. are the same as example 1.

Example 16: compared with the embodiment 1, the difference of the rock back mesh reinforcing adhesive and the preparation method thereof is that the epoxy resin is bisphenol F epoxy resin 862 and low-viscosity modified bisphenol A epoxy resin 816 are added according to the weight ratio of 5: 1 is prepared by compounding. The rest of the formulation, weight, preparation method, etc. are the same as example 1.

For examples 1, 9-16, the effect of different epoxy resin (bisphenol F epoxy 862: low viscosity modified bisphenol A epoxy 816) ratios on the overall performance of the reinforcement glue was analyzed and Table 3 was obtained:

TABLE 3 Effect of different epoxy resin ratios on the overall Properties of the reinforced adhesive

As is clear from Table 3, the apparent properties of the cured product became brittle as the amount of the bisphenol F epoxy resin 862 added increased. The surface drying time is firstly reduced and then increased, the compression shear strength and the tensile shear strength are firstly increased and then reduced, and when the ratio of the bisphenol F epoxy resin 862 to the low-viscosity modified bisphenol A epoxy resin 816 is 1:1, the performances of the two resins are better. In a blending system, the low steric hindrance of the bisphenol F epoxy resin 862 and the high steric hindrance of the low-viscosity modified bisphenol A epoxy resin 816 are compounded, so that the crosslinking density of a cured product is increased, and the performance of the cured product of the bisphenol F epoxy resin 862 system is greatly improved. Therefore, when the ratio of the bisphenol F epoxy resin 862 to the low-viscosity modified bisphenol A epoxy resin 816 is 1:1, the blending composite effect is the best.

Example 17: compared with the embodiment 1, the rock back mesh reinforcing adhesive and the preparation method thereof are characterized in that the component A and the component B are used in a matching way according to the volume ratio of 100: 45: the formula of the component A is as follows: 50g of epoxy resin; 1g of coupling agent; 3g of toughening agent; 0.5g of anti-aging auxiliary agent; the formula of the component B is as follows: 20g of dendritic amine curing agent; 15g of modified polyamide curing agent.

In the formula of the component A, the epoxy resin is bisphenol F epoxy resin 862; the toughening agent is selected from nano core-shell rubber (MX); the coupling agent is silane coupling agent KH 602; the anti-aging auxiliary agent is prepared from a hindered phenol antioxidant and a hindered amine stabilizer according to the mass ratio of 1: 20.

In the formula of the component B, the modified polyamide curing agent is curing agent XH 429; the dendritic amine curing agent is dendritic integral polyamide-amine.

The preparation method comprises the following steps:

s2, preparation of the component A: adding epoxy resin, a coupling agent, a toughening agent and an anti-aging auxiliary agent into a reaction kettle, stirring at 40 ℃, and vacuumizing to-0.1 Mpa in the stirring process; stirring at high speed for 1500r/min under vacuum for 2h, maintaining the temperature, ultrasonically dispersing for 45min, and cooling to 20 ℃ for deaeration to obtain a component A;

s3, preparation of a component B: adding the dendritic amine curing agent and the modified polyamide curing agent into a reaction kettle, stirring at 40 ℃, and vacuumizing to-0.1 Mpa in the stirring process; keeping vacuum and stirring at high speed for 1500r/min, stirring for 2h, then preserving heat, ultrasonically dispersing for 45min, and then cooling to 20 ℃ for defoaming to obtain a component B.

Example 18: compared with the embodiment 1, the rock back mesh reinforcing adhesive and the preparation method thereof are characterized in that the component A and the component B are used in a matching way according to the volume ratio of 100: 45: the formula of the component A is as follows: 80g of epoxy resin; 3g of coupling agent; 10g of toughening agent; 2g of an anti-aging auxiliary agent; the formula of the component B is as follows: 30g of dendritic amine curing agent; 25g of modified polyamide curing agent.

The preparation method comprises the following steps:

s2, preparation of the component A: adding epoxy resin, a coupling agent, a toughening agent and an anti-aging auxiliary agent into a reaction kettle, stirring at 55 ℃, and vacuumizing to-0.1 Mpa in the stirring process; keeping vacuum and stirring at high speed for 2000r/min, stirring for 2h, then preserving heat, ultrasonically dispersing for 45min, and then cooling to 40 ℃ for defoaming to obtain a component A;

s3, preparation of a component B: adding the dendritic amine curing agent and the modified polyamide curing agent into a reaction kettle, stirring at 55 ℃, and vacuumizing to-0.1 Mpa in the stirring process; keeping vacuum and stirring at high speed for 2000r/min, stirring for 2h, then preserving heat, ultrasonically dispersing for 45min, and then cooling to 40 ℃ for defoaming to obtain a component B.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that several improvements and modifications without departing from the principle of the present invention will occur to those skilled in the art, and such improvements and modifications should also be construed as within the scope of the present invention.

Claims

1. A rock plate back net reinforcing adhesive is characterized in that: the composition comprises a component A and a component B, wherein the component A and the component B are used in a matching way according to the volume ratio of 100: 45-55;

2. The rock back mesh reinforcing glue of claim 1, wherein: the component A and the component B are matched according to the volume ratio of 100: 50:

3. The rock back mesh reinforcing glue of claim 1, wherein: the epoxy resin is one or more of standard bisphenol A epoxy resin 128R, low-viscosity modified bisphenol A epoxy resin 816 and bisphenol F epoxy resin 862.

4. The rock back mesh reinforcing glue of claim 3, wherein: the epoxy resin is prepared from bisphenol F epoxy resin 862 and low-viscosity modified bisphenol A epoxy resin 816 according to the weight ratio of 1:1 is prepared by compounding.

5. The rock back mesh reinforcing glue of claim 1, wherein: the toughening agent is one or more of polyether polyol (PPG with molecular weight of 2000), carboxyl-terminated hyperbranched polyester (CYH-227) and nano core-shell rubber (MX).

6. The rock back mesh reinforcing glue of claim 1, wherein: the coupling agent is a silane coupling agent and is one or more of KH602, KH551, KH792 and KH 560.

7. The rock back mesh reinforcing glue of claim 1, wherein: the anti-aging auxiliary agent is prepared from a hindered phenol antioxidant and a hindered amine stabilizer according to the mass ratio of 1: 20.

8. The rock back mesh reinforcing glue of claim 1, wherein: the modified polyamide curing agent adopts one or two of a curing agent V140 and a curing agent XH 429;

and/or the dendritic amine curing agent is dendritic integral polyamide-amine.

9. A preparation method of a rock plate back mesh reinforcing adhesive is characterized by comprising the following steps: the method comprises the following steps:

s1, weighing: weighing epoxy resin, a coupling agent, a toughening agent, an anti-aging auxiliary agent, a dendritic amine curing agent and a modified polyamide curing agent according to the weight parts of the rock back mesh reinforcing adhesive of any one of claims 1 to 8;

10. The preparation method of the rock back mesh reinforcing glue according to claim 9, characterized by comprising the following steps: the reaction kettle comprises a kettle body (1), a jacket (2), a motor (3), an ultrasonic transducer (4), an inner cylinder (5) and a stirring mechanism;

the jacket (2) is sleeved on the surface of the kettle body (1), the motor (3) and the ultrasonic transducer (4) are both installed at the top of the kettle body (1), the inner cylinder (5) is located in the kettle body (1), the upper end and the lower end of the inner cylinder are both provided with openings, a connecting rod (8) is fixed between the inner cylinder (5) and the kettle body (1), the inner cylinder (5) is fixed in the kettle body (1) through the connecting rod (8), and the side wall of the inner cylinder (5) is provided with a through hole (6);

rabbling mechanism includes main shaft (91), pushing mechanism (92) and stirring rake (93), main shaft (91) with motor (3) output shaft, main shaft (91) be vertical setting and center pin with the cauldron body (1), inner tube (5) center pin coincidence, pushing mechanism (92) include helicla flute (921), circular groove (922), push pedal (923), sleeve (925) and slider (926), helicla flute (921) is followed main shaft (91) axial direction is seted up main shaft (91) circumference surface, circular groove (922) is seted up main shaft (91) circumference surface and with helicla flute (921) intercommunication, circular groove (922) is located helicla flute (921) upper end, sleeve (925) cover is established on main shaft (91), slider (926) is fixed sleeve (925) internal surface just inlays in helicla flute (921), the sliding block (926) is used for sliding in the spiral groove (921) and the circular groove (922);

push pedal (923) are fixed on sleeve (925) and with the inboard contact of inner tube (5), breach (924) have been seted up on push pedal (923), inner tube (5) inboard be fixed with deflector (7) of breach (924) looks adaptation, deflector (7) are inserted and are established in breach (924), stirring rake (93) are fixed on main shaft (91).