CN110396279B - Water-based self-breathing binder for pavement seal and preparation method thereof - Google Patents

Abstract

The invention discloses an aqueous self-breathing bonding material for a TIT embedding sealing layer and a preparation method thereof, wherein the aqueous bonding material comprises the following components: the water-based epoxy curing agent, the epoxy resin emulsion, the waste with low water absorption, the pigment and filler, the stabilizer, the flatting agent and the defoaming agent, the hardness of the embedded sealing layer is more than 2H after the water-based self-breathing consolidation material is cured, the drawing strength is more than 1.5MPa, and the pendulum friction value is more than or equal to 75. The water-based consolidation material has the advantages of self-breathing property, water resistance, no toxicity, no combustion, safe use, high hardness, strong adhesive force, wear resistance, long service life and the like, is convenient for mechanical spraying and rapid construction, can be used for TIT (triangulated irregular T) embedding sealing layers in occasions such as roads, bridges, tunnels and the like, and can also be used for floor materials with various colors indoors and outdoors.

Description

Water-based self-breathing binder for pavement seal and preparation method thereof

technical field

The invention belongs to the field of road consolidation materials, and in particular relates to a water-based self-breathing consolidation material for a TIT embedding and sealing layer and a preparation method thereof.

Background technique

TIT is the acronym for Thermosetting Inserting Technology in English, and embedded is the abbreviation for embedded thermosetting technology. TIT embedded sealing layer is a kind of pavement surface treatment sealing layer formed by natural air-drying by using the embedded sealing layer sprayer to spray the consolidation material and anti-slip aggregate on the road surface simultaneously.

At present, the TIT embedding and sealing layer mainly adopts water-based epoxy resin binder. A stable dispersion system was obtained. Compared with traditional epoxy resins, waterborne epoxy resins can not only meet the current environmental protection requirements, but also have better operating performance, especially when used in conjunction with other waterborne system materials, they can complement each other and give full play to their respective properties. . The outstanding advantage of waterborne epoxy resin is that it can be cured both at room temperature and in a humid environment, with reasonable curing time and high crosslinking density.

At present, the water-based epoxy resin used in the TIT embedding and sealing layer will form a dense film after curing and drying. Of course, it can ensure that the water on the road surface cannot penetrate under the road surface and play a protective role, but the water vapor under the water-based epoxy resin dense film cannot penetrate. Through the thin film, the groundwater vapor produces bubbles, bulging, etc., which lead to the shelling of the TIT embedding and sealing layer, resulting in the failure of the TIT embedding and sealing layer in a short time, which greatly reduces the use time. In order to prevent the TIT embedding and sealing layer from falling off and peeling easily, it is urgent to develop a water-based self-breathing binder for the TIT embedding and sealing layer.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a kind of water-based self-breathing consolidation of the water-based self-breathing material for the existing TIT embedding and sealing layer, such as poor self-breathing performance, easy falling off, peeling, and short service life. materials and methods for their preparation.

In order to achieve the above purpose, the present invention adopts the following technical scheme: a water-based self-breathing binder for a TIT embedding and sealing layer, comprising: water-based epoxy curing agent, epoxy resin emulsion, low water absorption waste, coupling agent , pigments and fillers, stabilizers, leveling agents and defoaming agents, the embedded sealing layer has a hardness of more than 2H after curing with an aqueous self-breathing binder, a tensile strength of more than 1 MPa, and a pendulum friction value of more than 70.

Further, the mass ratio of epoxy resin emulsion: low water absorption waste: pigment and filler: stabilizer: leveling agent: defoamer is 100: (5-15): (20-40): (0.5-2) : (0.5 to 2.5): (0.2 to 2).

Further, the ratio of the amount of amino active hydrogen contained in the aqueous epoxy curing agent and the epoxy resin emulsion to the amount of the epoxy group contained in the epoxy resin emulsion is 0.8-1.2:1.

Further, the mass ratio of the low water absorption waste and the coupling agent is 100:1-3.

Further, the low water absorption waste is one or a mixture of waste wood chips, waste bagasse, waste rice husks, waste polyurethane foam and waste phenolic foam.

Further, the pigments and fillers are one or a mixture of iron oxide red, carbon black, silicon dioxide, calcium sulfate, talc, clay, and calcium carbonate.

Further, the stabilizer is one or a mixture of heat stabilizers, ultraviolet absorbers, and ultraviolet shielding agents.

Further, the leveling agent is one of polyorganosiloxane, polyether-modified polyorganosiloxane or fluorine-containing surfactant; the defoamer is an aqueous defoamer.

Further, the coupling agent is a silane coupling agent or a titanate coupling agent. [gamma]-glycidyl etheroxypropyltrimethoxysilane (KH560) is preferred.

A preparation method of water-based self-breathing binder for TIT embedding and sealing layer comprises the following steps:

(1) Preparation of low water absorption waste slurry: After pulverizing the low water absorption waste, put it into a reactor with stirring, add a coupling agent and react at 90 to 120 ° C for 1 to 2 hours; then cool down to room temperature, add deionized water, stir and disperse to obtain low water absorption waste slurry with a solid content of 10% to 20%;

(2) Preparation of epoxy resin slurry: put the epoxy resin emulsion into the stirring tank, start stirring, slowly add low water absorption waste slurry, pigment and filler, stabilizer, leveling agent and foaming agent in sequence, filter Prepare epoxy resin slurry;

(3) Preparation of water-based self-breathing binder for TIT embedding and sealing layer: add water-based epoxy curing agent and epoxy resin slurry, stir evenly, and filter to obtain water-based self-breathing binder for TIT embedding and sealing layer .

Low water absorption waste refers to a type of waste from crops or industrial products with low water absorption, such as waste wood chips, waste bagasse, waste rice husks, waste polyurethane foam, waste phenolic foam, etc. These low water absorption wastes can be pulverized to obtain low water absorption waste powder. After surface modification, a low water absorption waste slurry can be obtained. The slurry has good compatibility with epoxy resin emulsion. After embedding the sealing layer with water-based self-breathing binder, it is applied to the pavement surface treatment. After the consolidation material is cured, with the volatilization of water, capillary pores are formed in situ at the low water absorption waste, which is only permeable to steam but not water, thus fundamentally solving the self-respiration of the water-based consolidation material of the TIT embedded sealing layer. It can prevent the TIT embedded seal layer from falling off and peeling easily; if it encounters water on the road surface, the low water absorption waste will absorb water and expand, but due to the low expansion rate, it can not only prevent water from leaking to the bottom of the road, but also It can increase the strength of the road surface and prevent the damage of the TIT embedded sealing layer.

Beneficial effects of the present invention: (1) Compared with the solvent-based consolidation material currently used in the market, the water-based self-breathing consolidation material of the TIT embedded sealing layer of the present invention is non-toxic, non-flammable, safe to use, and non-polluting environment, etc. (2) Compared with the water-based binder currently used in the market, the water-based self-breathing binder for the TIT embedding and sealing layer of the present invention has the advantages of simple preparation process, low cost, high adhesion, high hardness, wear resistance, etc. advantage. (3) The present invention comprehensively considers the requirement that the water-based self-breathing cementitious material of the TIT embedding layer is used for the road surface substrate, and the low water absorption waste is modified by the silane coupling agent to improve the low water absorption waste. High compatibility and stability with water-based epoxy resin; through dehydration of low water-absorbing waste, capillary pores are formed in situ, and the water vapor in the lower layer of the road is easy to pass through, so that the self-breathing performance of the water-based binder of the TIT embedded sealing layer In the presence of water, it absorbs water and expands with low water, which can not only prevent the leakage of water to the bottom of the road, but also increase the strength of the road, which can greatly improve the service life of the water-based self-breathing cementitious material for the TIT embedded sealant. .

Specific implementation method

In order to make those skilled in the art better understand the solutions of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present application, not All examples. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the scope of protection of the present application.

It should be noted that the terms "comprising" and "having" in the description and claims of the present application and the above-mentioned drawings, as well as any modifications thereof, are intended to cover non-exclusive inclusion, for example, including a series of steps or units The processes, methods, systems, products or devices are not necessarily limited to those steps or units expressly listed, but may include other steps or units not expressly listed or inherent to such processes, methods, products or devices.

Example 1

(1) Preparation of low water absorption waste slurry:

100 parts of waste wood chips were pulverized, added to the reactor with stirring, and 1 part of KH560 was added to react at 90° C. for 2 hours. It is then cooled to room temperature, 400 parts of deionized water are added, and the mixture is stirred and dispersed to obtain a low water absorption waste slurry with a solid content of 20%.

(2) Preparation of epoxy resin slurry:

Put 100 parts of epoxy emulsion (Zhejiang Anbang New Material Development Co., Ltd., AB-EP-12 (W60)) into the stirring tank, start stirring, slowly add 5 parts of low water absorption waste slurry, 10 parts of oxidized Iron red, 10 parts talc, 0.5 part

Heat stabilizer 1010, 0.5 part of polyorganosiloxane leveling agent and 0.2 part of water-based defoamer were filtered to obtain epoxy resin slurry. (3) Preparation of water-based self-breathing binder for TIT embedding and sealing layer:

Add water-based epoxy curing agent (Zhejiang Anbang New Material Development Co., Ltd., AB -HGD) and epoxy resin slurry, stir evenly and filter to obtain the water-based self-breathing binder for the TIT embedding and sealing layer.

Example 2

(1) Preparation of low water absorption waste slurry:

70 parts of waste bagasse and 30 parts of waste polyurethane foam were pulverized respectively, put into a reactor with stirring, added with 2 parts of KH560, and reacted at 100° C. for 1.5 hours. It was then cooled to room temperature, 570 parts of deionized water was added, and the mixture was stirred and dispersed to obtain a low water absorption waste slurry with a solid content of 15%.

(2) Preparation of epoxy resin slurry:

Put 100 parts of epoxy emulsion (Shanghai Hanzhong Paint Co., Ltd., H190) into the stirring kettle, start stirring, and slowly add 10 parts of low water absorption waste slurry, 10 parts of calcium sulfate, 20 parts of clay, and 0.5 parts of thermal stabilization. agent 1010, 1.0 part of ultraviolet absorber UV-531, 1.5 part of polyether-modified polyorganosiloxane leveling agent and 1.0 part of water-based defoamer, and filtered to obtain epoxy resin slurry.

(3) Preparation of water-based self-breathing binder for TIT embedding and sealing layer:

Add water-based epoxy curing agent (Shanghai Hanzhong Paint Co., Ltd., H201B) and epoxy resin according to the ratio of the amount of amino active hydrogen contained in the water-based epoxy curing agent to the epoxy group contained in the epoxy resin emulsion as 1:1. Oxygen resin slurry, stir evenly and filter to obtain water-based self-breathing binder for TIT embedding and sealing layer.

Example 3

(1) Preparation of low water absorption waste slurry:

50 parts of waste polyurethane foam, 20 parts of waste phenolic foam and 30 parts of waste rice husks were pulverized respectively, added to the reactor with stirring, added with 3 parts of KH560, and reacted at 120° C. for 1 hour. It is then cooled to room temperature, 900 parts of deionized water is added, and the mixture is stirred and dispersed to obtain a low water absorption waste slurry with a solid content of 10%.

(2) Preparation of epoxy resin slurry:

Put 100 parts of epoxy emulsion (Suzhou Meiguowang Flooring Material Co., Ltd., WG827) into the stirring tank, start stirring, and slowly add 15 parts of low water absorption waste slurry, 10 parts of carbon black, and 10 parts of calcium sulfate. , 20 parts of carbon black, 1.0 part of heat stabilizer 264, 1.0 part of ultraviolet absorber UV-327, 2.5 parts of fluorine-containing surfactant leveling agent and 2 parts of water-based defoamer, and filtered to obtain epoxy resin slurry.

(3) Preparation of water-based self-breathing binder for TIT embedding and sealing layer:

The water-based epoxy curing agent (Suzhou Meiguowang Flooring Material Co., Ltd., WG802) and epoxy resin slurry, stir evenly and filter to obtain water-based self-breathing cementitious material for TIT embedding and sealing layer.

Comparative Example 1

(1) Preparation of epoxy resin slurry:

Put 100 parts of epoxy emulsion (Zhejiang Anbang New Material Development Co., Ltd., AB-EP-12 (W60)) into the stirring kettle, start stirring, slowly add 10 parts of calcium sulfate, 20 parts of clay, 0.5 parts of thermal stabilizer agent 1010, 1.0 part of ultraviolet absorber UV-531, 1.5 part of polyether-modified polyorganosiloxane leveling agent and 1.0 part of water-based defoamer, and filtered to obtain epoxy resin slurry.

(3) Preparation of water-based binder for TIT embedding and sealing layer:

Add water-based epoxy curing agent (Zhejiang Anbang New Material Development Co., Ltd., AB -EP-12(W60)) and epoxy resin slurry, stir evenly and filter to obtain water-based binder for TIT embedding and sealing layer.

The performance test results are shown in Table 1:

Table 1 Performance test results

Note: a is tested in dry state; b is tested in wet state

After the water-based binder is cured, the hardness, water permeability, adhesion and abrasion resistance of Examples 1-3 are improved to a certain extent compared with Comparative Example 1; The water-absorbent waste generates capillary pores in situ due to dehydration, and water vapor is easy to pass through; and the water vapor transmission rate is not much different in the wet state, because the low-absorbent waste absorbs water and expands low in the presence of water, preventing water vapor transmission. water vapor permeates.

The TIT embedding and sealing layer of the invention has excellent performance of water-based self-breathing binder, good compatibility of the system, low cost of raw materials, high production efficiency, easy industrialization, wide application, no toxic solvent release in the whole process, and high production efficiency. A non-toxic and non-polluting environment-friendly consolidation material for TIT embedded solid sealing layer.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (7)

1. A water-based self-breathing binder for TIT embedding and sealing layer is characterized in that comprising: water-based epoxy curing agent, epoxy resin emulsion, low water absorption waste, coupling agent, pigment and filler, stabilizer, Leveling agent and defoaming agent, the hardness of the embedded sealing layer after curing with water-based self-breathing binder is greater than 2H, the pull-out strength is greater than 1MPa, and the pendulum friction value is greater than or equal to 70; The mass ratio of the epoxy resin emulsion: low water absorption waste: pigment and filler: stabilizer: leveling agent: defoaming agent is 100: (5-15): (20-40): (0.5-2): (0.5～2.5): (0.2～2); The mass ratio of the low water absorption waste and the coupling agent is 100:1-3; The low water absorption waste is one or several mixtures of waste wood chips, waste bagasse, waste rice husks, waste polyurethane foam and waste phenolic foam; The consolidation material is prepared by the following steps: (1) Preparation of low water absorption waste slurry: After pulverizing the low water absorption waste, put it into a reactor with stirring, add a coupling agent and react at 90 to 120 ° C for 1 to 2 hours; then cool down to room temperature, add deionized water, stir and disperse to obtain low water absorption waste slurry with a solid content of 10% to 20%; (2) Preparation of epoxy resin slurry: put the epoxy resin emulsion into the stirring tank, start stirring, slowly add low water absorption waste slurry, pigments and fillers, stabilizers, leveling agents and defoaming agents in sequence, The epoxy resin slurry was obtained by filtration; (3) Preparation of water-based self-breathing binder for TIT embedding and sealing layer: add water-based epoxy curing agent and epoxy resin slurry, stir evenly, and filter to obtain water-based self-breathing binder for TIT embedding and sealing layer . 2. the water-based self-breathing binder of TIT embedding layer according to claim 1, it is characterized in that: described water-based epoxy curing agent and epoxy resin emulsion are by the amino active hydrogen that water-based epoxy curing agent comprises The ratio to the amount of epoxy groups contained in the epoxy resin emulsion is 0.8 to 1.2:1. 3. water-based self-breathing cementitious material for TIT embedding and sealing layer according to claim 1, is characterized in that: described pigments and fillers are red iron oxide, carbon black, silicon dioxide, calcium sulfate, talcum powder, china clay , one or several mixtures of calcium carbonate. 4. the water-based self-breathing binder of TIT embedding layer according to claim 1, is characterized in that: described stabilizing agent is one or more mixtures in heat stabilizer, ultraviolet absorber, ultraviolet shielding agent . 5. The water-based self-breathing binder of TIT embedding and sealing layer according to claim 1 is characterized in that: the leveling agent is polyorganosiloxane, polyether-modified polyorganosiloxane or One of the fluorine-containing surfactants; the defoamer is an aqueous defoamer. 6 . The water-based self-breathing binder for the TIT embedding and sealing layer according to claim 1 , wherein the coupling agent is a silane coupling agent or a titanate coupling agent. 7 . 7. according to the preparation method of the water-based self-breathing binder of the arbitrary described TIT embedding and sealing layer of claim 1 to 6, it is characterized in that comprising the following steps: (1) Preparation of low water absorption waste slurry: After pulverizing the low water absorption waste, put it into a reactor with stirring, add a coupling agent and react at 90 to 120 ° C for 1 to 2 hours; then cool down to room temperature, add deionized water, stir and disperse to obtain low water absorption waste slurry with a solid content of 10% to 20%; (2) Preparation of epoxy resin slurry: put the epoxy resin emulsion into the stirring tank, start stirring, slowly add low water absorption waste slurry, pigments and fillers, stabilizers, leveling agents and defoaming agents in sequence, The epoxy resin slurry was obtained by filtration; (3) Preparation of water-based self-breathing binder for TIT embedding and sealing layer: add water-based epoxy curing agent and epoxy resin slurry, stir evenly, and filter to obtain water-based self-breathing binder for TIT embedding and sealing layer .