CN105693914B - A kind of anti-tire trace resin emulsion sealing and its construction method - Google Patents

Abstract

The invention discloses an anti-tire trace resin emulsion sealing layer and a construction method thereof. It is prepared in the following way: mix the emulsifier, acrylic monomer and deionized water, heat up and stir to obtain a one-stage pre-emulsion; add drop-wise a one-stage pre-emulsion to the initiator solution to obtain a nuclear emulsion; The two-stage pre-emulsion with the initiator solution is added dropwise to the obtained nuclear emulsion, and the temperature is kept at 72-76 ° C for 1.5-2.5 hours, then the temperature is raised to 79-81 ° C, the reaction is continued for 1.5-2.5 hours, and then lowered to room temperature; Neutralize and add ADH crosslinking agent to obtain thermosetting acrylic resin emulsion material. The emulsion with core-shell structure was synthesized by the method of emulsion polymerization, which has high polymerization stability and storage stability. It has excellent comprehensive mechanical properties and can reduce the wear between the road surface and the tire.

Description

A kind of anti-tyre resin emulsion sealing layer and its construction method

technical field

The invention belongs to the technical field of road engineering, and relates to an anti-tyre resin emulsion sealing layer and a construction method thereof.

Background technique

During the development of colored pavement, problems such as easy residue of tire marks and difficulty in cleaning have always been important problems hindering its large-scale promotion. Due to the friction work between the tire and the road surface, the residue of black traces is inevitable, usually on colored pavement. After opening to traffic, there will be residual tire marks, which will affect the color function of the colored pavement, such as pavement color wear, surface color replaced by tire marks, etc. In addition, the most important function of colored pavement is the effect of color, and due to the influence of the use environment, such as insufficient oil pollution (or soil pollution) ability and poor anti-ultraviolet radiation ability, the colored asphalt pavement is easily polluted and quickly loses its color. function, while the daily maintenance costs are higher. Therefore, in view of the problems faced by the current application of colored pavement, an effective material and method are urgently needed at this stage to solve or prevent tire trace residues on colored pavement.

Contents of the invention

The object of the present invention is to provide a protective seal material for colored pavement, which can effectively avoid or reduce the residue of tire marks and improve the color durability of colored pavement.

In order to achieve the above purpose, the following technical solutions are adopted:

A colored pavement protection sealing material is prepared in the following manner:

1) Mix 5.5-5.8 parts by mass of emulsifier, 52-58 parts by mass of acrylic monomer and 58-62 parts by mass of deionized water in a container, heat up to 54°C and stir for 300 minutes to obtain one-stage pre-emulsification liquid;

Add 3 to 4 parts by mass of initiator solution into a reaction vessel at 72-76°C, add 87 to 94 parts by mass of a one-stage pre-emulsion dropwise, finish the drop within 1 hour, and add 1 to 3 parts by mass when the drop is halfway The initiator solution of part, obtains nuclear emulsion;

2) Stir and pre-emulsify 65-69 parts by mass of acrylic monomer, 3-6 parts by mass of emulsifier, and 58-62 parts by mass of deionized water for 1 hour to obtain a two-stage pre-emulsion;

Slowly drop 1.3 to 1.8 parts by mass of the initiator solution into the two-stage pre-emulsion of 128 to 133 parts by mass, and then slowly add the two-stage pre-emulsion mixed with the initiator solution dropwise to the nuclear emulsion obtained in step 1) , the dropwise addition is completed within 1 hour, add 0.7-1.2 parts by mass of initiator solution when the drop is halfway through, add 2-4 parts by mass of initiator solution after dropping, keep the temperature at 72-76°C for 1.5-2.5 hours Raise the temperature to 79-81°C, continue the reaction for 1.5-2.5h, and then cool down to room temperature; neutralize it with ammonia water and slowly add 0.25-0.27 parts by mass of 10wt% ADH crosslinking agent aqueous solution to finally obtain thermosetting acrylic acid Resin-like emulsion materials.

According to the above scheme, the emulsifier in step 1) is a mixture of 2.8-3.0 parts by mass of octylphenol polyoxyethylene ether and 2.5-2.7 parts by mass of sodium lauryl sulfate.

According to the above scheme, the acrylic monomer in step 1) is a mixture of 26-30 parts by mass of methyl methacrylate, 24-28 parts by mass of butyl acrylate, and 1.5-2.5 parts by mass of acrylic acid.

According to the above scheme, the emulsifier in step 2) is a mixture of 2.8-3.2 parts by mass of octylphenol polyoxyethylene ether and 0.8-1.2 parts by mass of sodium lauryl sulfate.

According to the above scheme, the acrylic monomer in step 2) is 31-35 parts by mass of methyl methacrylate, 30-32 parts by mass of butyl acrylate, 2.4-2.8 parts by mass of acrylic acid, 0.25-0.27 parts by mass of bis Mixture of acetone acrylamide.

According to the above scheme, the initiator solution is an aqueous solution of ammonium persulfate with a concentration of 0.1 g/mL.

According to the above scheme, the ADH cross-linking agent is adipic acid dihydrazide.

Thermosetting acrylic resin emulsion is formed by reacting monomer, initiator and distilled water together through emulsion polymerization. The emulsion is milky white liquid before curing, and its relative molecular weight is low. Under the construction viscosity, the solid content of the emulsion Usually around 45%. Because acrylic monomers have carbon-carbon unsaturated double bonds, the acrylic resin formed by polymerization not only has high light, heat and chemical stability, but also has high transparency, excellent color retention, good film-forming properties, and safe use. Features.

The curing of the thermosetting acrylic resin emulsion of the present invention is mainly divided into three stages: the first is the evaporation of water and the concentration of colloidal particles; the second is the deformation of latex particles and the coalescence of particles; the third is the bonding between particles to form a continuous phase. Uniform latex coating. Artificially spraying a layer of thermosetting acrylic resin emulsion of the present invention on the surface of traditional colored pavement can reduce the residue of tire marks on the road surface and facilitate cleaning, and increase the water tightness of the surface layer of the colored pavement on the other hand.

The beneficial effects of the present invention are:

The provided thermosetting acrylic resin emulsion sealing material is designed with a particle structure, and a core-shell structure emulsion is synthesized by emulsion polymerization, which has high polymerization stability and storage stability, and is transparent after the emulsion is cured and formed into a film , Good color retention, safe and environmentally friendly to use, can better improve the adhesion to the colored road surface, and has excellent comprehensive mechanical properties, which can reduce the wear between the road surface and the tire.

After artificial spraying on the surface of the colored pavement, it can effectively improve the stain resistance of the colored pavement and the ability to resist the residual tire marks while ensuring the good anti-skid performance of the pavement, and increase the water tightness of the surface of the colored pavement.

detailed description

The following examples further illustrate the technical content of the present invention, but are not intended to limit the protection scope of the present invention.

The preparation of thermosetting type acrylic resin emulsion of the present invention:

The pre-emulsification process of acrylic resin emulsion: 56g methyl methacrylate (MMA), 52g butyl acrylate (BA) and 4g acrylic acid (AA) three acrylic monomers, and 6g octylphenol polyoxyethylene ether (OP-10), 5g sodium dodecyl sulfate (SDS), and 120g deionized water were added to a 1000mL four-necked bottle, and an electric stirrer, a condenser tube, and a dropping funnel were respectively installed, and the temperature was raised to 54°C and started Stir for about 300min to prepare the first-stage pre-emulsion.

66g methyl methacrylate (MMA), 62g butyl acrylate (BA), 5.2g acrylic acid (AA) and 0.52g diacetone acrylamide (DAAM) four acrylic monomers, and 6g octylphenol polyoxygen Vinyl ether (OP-10), 2g sodium dodecyl sulfate (SDS), and 120g deionized water were added to a 1000mL four-necked bottle, and stirred for about 1 hour at room temperature using a magnetic stirrer to prepare the second-stage pre-emulsion .

1.6 g of ammonium persulfate (APS) initiator was dissolved in 16 mL of water to prepare an aqueous initiator (APS) solution.

Next, the preparation of the seed emulsion: take 1/4 of the first-stage pre-emulsion and pour it into a four-neck bottle separately, add 4 mL of APS solution after heating up to 74°C, and react for about 30 minutes to prepare the seed emulsion.

Preparation of nuclear emulsion: keep the reaction temperature at 74°C, add 3mL of APS aqueous solution to the reaction bottle, and drop the remaining 3/4 of the first-stage pre-emulsion, and drop it within 1h. Additional 2 mL of APS aqueous solution was added.

Preparation of the shell emulsion: transfer the second-stage pre-emulsion to the dropping funnel, add 3mL of APS aqueous solution, and then slowly add dropwise to the core emulsion, add 2mL of APS aqueous solution when the drop is halfway, drop within 1h After the addition was complete, the remaining APS aqueous solution was added, and the heating temperature was maintained at 74°C for 2h, then the temperature was raised to 80°C, the reaction was continued for 2h, and finally it was lowered to room temperature.

Finally, neutralize the polymerized emulsion with ammonia water (NH ₃ H ₂ O), and slowly add 0.52 g of 10% adipic acid dihydrazide (ADH) cross-linking agent aqueous solution, stir for about 10 minutes until uniform, and filter , and discharged to obtain a milky white thermosetting acrylic resin emulsion showing blue light.

Construction steps of the anti-tire track resin emulsion sealant material provided by the invention:

The spraying of the anti-tyre track resin sealant emulsion can be operated in the form of artificial spraying, and the spraying amount is 0.75～1.25kg/m ² ;

Before spraying, the emulsification can be diluted with water at a ratio of 3:1 to reduce the solid content in the unit emulsion.

The thermosetting acrylic resin emulsion is sprayed on the road surface to form an anti-tire resin emulsion seal layer. During the spraying process of the resin emulsion, once the amount of spraying is too large, the milky white liquid is easy to gather in the texture of the surface of the micro-surface, accumulating Because the emulsion material is not easy to evaporate and demulsify, it gradually forms a white solid that adheres to the surface of the colored pavement, thereby affecting the color of the colored pavement; For trace colored pavement, water should be used to dilute the resin sealing emulsion to achieve the purpose of effectively controlling the amount of emulsion.

Secondly, the spraying of the anti-tire marking resin sealant emulsion can be carried out in the form of artificial spraying, and the spraying amount is 0.1kg/m ² . Due to the high solid content of the resin sealant emulsion, when the amount of spraying is too large, the resin emulsion breaks and easily forms a white solid object due to precipitation, which not only blocks the color of the road surface, but also easily reduces the anti-skid performance of the surface . Therefore, before spraying, dilute the emulsion with water at a ratio of 3:1 to reduce the solid content in the unit emulsion. After that, artificial spraying can improve the spraying state of the emulsion, making it less likely to precipitate during the coagulation process, and can ensure the coverage and uniformity of the spraying.

The performance indicators of the thermosetting acrylic resin emulsion obtained in the examples are shown in Table 1.

Table 1

project Thermosetting acrylic resin emulsion experiment method Exterior white solid, no impurities GB/T1721-2008 Adhesion level 2 GB/T1720-1979 Impact strength 48kg·cm GB/T1732-1993 Water resistance (immersion 48h) basically no change GB/T1733-1993 Heat resistance (90℃) No bubbles, no wrinkle GB/T1735-1989 oil resistance No stickiness, no air bubbles GB/T1734-1993 UV aging resistance (1000h) no change GB/T5263-2010

The performance is excellent, in line with national standards. In addition, it is worth noting during the construction that: after the original road surface is fully cleaned, the surface should be artificially sprayed with anti-tire trace resin emulsion sealing layer; before the resin emulsion is solidified, the excessively sprayed area can be spread evenly with a brush ; After the resin emulsion is solidified, check that the coverage of the road emulsion seal layer should be greater than 95%, and repair the unsprayed areas in time; pay attention to the construction environment in advance, and avoid artificial spraying in bad weather such as snow, rain, and high temperature.

Claims (6)

1. a kind of colored road surface protects sealing material, it is characterised in that be prepared in the following ways：

1) going the emulsifying agent of 5.5~5.8 mass parts, the acrylic monomer of 52~58 mass parts and 58~62 mass parts Ionized water mixing in a reservoir, is warming up to 54 DEG C of stirring 300min, obtains a stage pre-emulsion；

The initiator solution of 3~4 mass parts is added in 72-76 DEG C of reaction vessel, a stage of 87~94 mass parts is added dropwise Pre-emulsion, is dripped off in 1h, and the initiator solution of 1~3 mass parts is added when dripping to half, obtains core emulsion；

2) by the acrylic monomer of 65~69 mass parts, the emulsifying agent of 3~6 mass parts, 58~62 mass parts deionized water Pre-emulsification 1h is stirred, two-stage pre-emulsion is obtained；

The initiator solution of 1.3~1.8 mass parts is slowly dropped into the two-stage pre-emulsion of 128~133 mass parts, then The two-stage pre-emulsion for being mixed with initiator solution is slowly dropped to step 1) gained core emulsion in, be added dropwise to complete in 1h, drip The initiator solution of 0.7~1.2 mass parts is added during to half, the initiator solution of 2~4 mass parts is added after dripping off, is kept Temperature continues to react 1.5-2.5h, is then down to room temperature to be warming up to 79-81 DEG C after 72-76 DEG C of reaction 1.5-2.5h；Use ammoniacal liquor It is neutralized to neutral and is slowly added in the 10wt% adipic dihydrazide aqueous solution of 0.25~0.27 mass parts, finally obtains thermosetting Type acrylic resin emulsion material.

2. colored road surface as claimed in claim 1 protects sealing material, it is characterised in that step 1) in emulsifying agent be 2.8~3.0 The mixing of the lauryl sodium sulfate of the Polyethylene Octylphenol Ether of mass parts and 2.5~2.7 mass parts.

3. colored road surface as claimed in claim 1 protects sealing material, it is characterised in that step 1) in acrylic monomer be 26 The methyl methacrylate of~30 mass parts, the butyl acrylate of 24~28 mass parts, the acrylic acid of 1.5~2.5 mass parts Mixing.

4. colored road surface as claimed in claim 1 protects sealing material, it is characterised in that step 2) in emulsifying agent be 2.8~3.2 The mixing of the Polyethylene Octylphenol Ether of mass parts, the lauryl sodium sulfate of 0.8~1.2 mass parts.

5. colored road surface as claimed in claim 1 protects sealing material, it is characterised in that step 2) in acrylic monomer be 31 The methyl methacrylate of~35 mass parts, the butyl acrylate of 30~32 mass parts, the acrylic acid of 2.4~2.8 mass parts, The mixing of the DAAM of 0.25~0.27 mass parts.

6. colored road surface as claimed in claim 1 protects sealing material, it is characterised in that the initiator solution is ammonium persulfate The aqueous solution, concentration is 0.1g/mL.