A polymer-modified colored anti-slip coating and its construction process

Abstract

The present invention discloses a polymer-modified colored anti-skid coating, comprising the following components: 50-70 parts of a modified epoxy resin, 20-30 parts of a curing agent, 0.2-0.4 parts of an interface agent, 0.2-0.5 parts of a light stabilizer, and 5-8 parts of a color paste. All parts are by weight. The present invention addresses the problems of poor adhesion to road surfaces, cracking, and aging associated with conventional colored protective coatings. By grafting the epoxy resin through a chemical reaction grafting method, cyanate groups are introduced, increasing the coating's flexibility. Simultaneously, the cyanate groups significantly enhance the epoxy resin's cross-linking structure, which, together with the interface agent, further improves the color protective coating's adhesion to the road surface. The present invention also discloses a construction process for the colored anti-skid coating, which boasts a simple preparation process and low cost.

Description

Technical Field

[0001] The present invention relates to the field of colored paving, in particular to a polymer-modified colored anti-slip coating and a preparation process thereof. Background Art

[0002] In order to effectively prevent and reduce the occurrence of traffic accidents, my country has sprayed eye-catching road markings and warning slogans and laid colored anti-skid pavement at intersections, urban slow lanes, pedestrian overpasses, bus stops, slopes, toll booths, tunnel entrances and exits, and areas where traffic accidents are frequent, to prompt drivers to make timely judgments and quickly slow down, thereby reducing the incidence of accidents.

[0003] By laying colored anti-slip pavement, we can achieve the perfect unity of functionality and aesthetics in road construction, and provide citizens with smooth, comfortable and safe travel conditions.

[0004] The core of the colored anti-skid material is the coating material. After being evenly mixed with the anti-skid aggregate curing agent, it is scraped or sprayed onto the road surface to form a wear-resistant and anti-skid layer with a thickness of 4mm to 5mm, which plays a warning and anti-skid role.

[0005] The existing coating materials on the market mostly use epoxy and polyurethane colored coatings. Among them, polyurethane coatings are more expensive and the quality on the market is uneven; conventional epoxy resin coatings are prone to cracks, discoloration, voids and other problems, making the service life of colored anti-slip pavement unable to be guaranteed. Summary of the Invention

[0006] This invention addresses the problems of poor adhesion to the road surface, cracking, and aging associated with conventional color protective coatings. By grafting epoxy resin through a chemical reaction grafting method, cyanate groups are introduced to increase the coating's flexibility. Simultaneously, the introduction of cyanate groups significantly enhances the epoxy resin's cross-linking structure, which, together with the interface agent, further improves the color protective coating's adhesion to the road surface.

[0007] To solve the above technical problems, the present invention adopts a technical solution: a polymer-modified colored anti-slip coating, which is made of the following components:

[0008] 50~70 parts of modified epoxy resin,

[0009] 20~30 parts of curing agent,

[0010] 0.2~0.4 parts of interface agent,

[0011] 0.2~0.5 parts of light stabilizer,

[0012] 5~8 parts of color paste,

[0013] The above parts are all parts by weight.

[0014] The modified epoxy resin contains a cyanate group, and the preparation method of the modified epoxy resin is as follows:

[0015] (1) placing a mixture of epoxy resin, isophorone diisocyanate and polypropylene glycol in a reaction device, heating the mixture to 60° C. under nitrogen protection, adding a catalyst to carry out a first esterification reaction, and obtaining a first esterification reaction liquid;

[0016] (2) The first esterification reaction liquid is added with the same mass of polypropylene glycol as in step (1) and mixed evenly. The system is heated to 80° C. and a second esterification reaction is carried out under nitrogen protection to obtain a modified epoxy resin.

[0017] Preferably, in step (1) of the modified epoxy resin preparation method, the mass ratio of epoxy resin, diisocyanate and polypropylene glycol is (60-70): (4-10): (8-10).

[0018] Preferably, the catalyst in step (1) of the modified epoxy resin preparation method is one of stannous isooctanoate, dibutyltin dilaurate and stannous octoate.

[0019] Preferably, in step (1) of the modified epoxy resin preparation method, the mass ratio of the epoxy resin to the catalyst is (60-70):(2-5).

[0020] Preferably, in the modified epoxy resin preparation method, the first esterification reaction time is 3 to 4 hours, and the second esterification reaction time is 4 to 5 hours.

[0021] Preferably, the curing agent is one or more of isophoronediamine, diethylenetriamine and ethylenediamine.

[0022] Preferably, the interface agent is polyether-modified polysiloxane.

[0023] Preferably, the light stabilizer is UV 119.

[0024] The present invention also provides a construction process for the polymer-modified colored anti-slip coating, comprising the following steps:

[0025] (1) Clean the dust on the road base surface and repair the original road surface damage to ensure that the road base surface is flat, clean and dry;

[0026] (2) Adding color paste, interface agent and light stabilizer to the modified epoxy resin in order according to parts by weight, mechanically stirring for 10 to 15 minutes, then adding curing agent, and mechanically stirring for 5 to 10 minutes to obtain a polymer-modified colored anti-slip coating;

[0027] (3) Scrape the polymer modified colored anti-skid coating described in step (2) onto the road base surface, and simultaneously spread ceramic aggregate to a coating thickness of 2 to 3 mm; maintain for 1 to 2 hours and remove floating sand;

[0028] (4) Spray fluorocarbon topcoat and maintain for 2 to 4 hours before opening to traffic.

[0029] Preferably, the Mohs hardness of the ceramic aggregate is not less than 7, and the abrasion value is not greater than 17%.

[0030] The beneficial effects of the present invention are: different from the prior art, the present invention introduces cyanate groups by chemically grafting and modifying the epoxy resin, which can improve the flexibility of the epoxy resin coating and avoid cracking due to thermal expansion and contraction of the road base surface; on the other hand, the cyanate groups have high activity in outdoor scenes and can react with water to generate urea bonds. The formation of urea bonds can increase the cross-linking density of the coating and improve the wear resistance of the coating; at the same time, the role of the interface agent is utilized to significantly improve the bonding performance between the color coating and the road surface, which has the characteristics of simple process and low cost. DETAILED DESCRIPTION

[0031] The present invention will be further understood by the following specific examples and comparative examples, but they are not intended to limit the present invention.

[0032] In addition, in the embodiments of the present invention, the coating film appearance, water resistance, alkali resistance, low-temperature crack resistance, skid resistance and artificial accelerated weathering resistance of the polymer-modified colored anti-skid coating all adopt the standards specified in "Pavement Anti-skid Coatings" (JT / T 712-2008).

[0033] Sources of raw materials in the following examples:

[0034] Epoxy resin (E51): Jiangyin Wanqian Chemicals Co., Ltd.;

[0035] Isophorone diisocyanate: Shanghai Hongzhuang Chemical Technology Co., Ltd.

[0036] Polypropylene glycol: Shanghai Hongzhuang Chemical Technology Co., Ltd.;

[0037] Dibutyltin dilaurate: Shandong Maofa Chemical Co., Ltd.;

[0038] Stannous octoate: Shandong Polychemical Co., Ltd.

[0039] Stannous 2-ethylhexanoate: Shandong Polychemical Co., Ltd.

[0040] Isophorone diamine: Shanghai Hongzhuang Chemical Technology Co., Ltd.;

[0041] Diethylenetriamine: Jiangsu Leien Environmental Protection Technology Co., Ltd.;

[0042] Ethylenediamine: Jiangsu Leien Environmental Protection Technology Co., Ltd.;

[0043] Polyether-modified polysiloxane: Evonik Specialty Chemicals (Shanghai) Co., Ltd.

[0044] UV 119: Shenzhen Longdi Chemical Co., Ltd.

[0045] In the following examples, all reagents are expressed in parts by weight.

[0046] Example 1:

[0047] Preparation of modified epoxy resin:

[0048] (1) A mixture of 60 parts of epoxy resin (E51), 6 parts of isophorone diisocyanate, and 8 parts of polypropylene glycol was placed in a reaction apparatus, heated to 60°C under nitrogen protection, and 2 parts of dibutyltin dilaurate were added to carry out a first esterification reaction. The reaction was continued for 4 hours to obtain a first esterification reaction liquid;

[0049] (2) After adding 8 parts of polypropylene glycol to the first esterification reaction liquid and mixing evenly, the system was heated to 80°C and a second esterification reaction was carried out under nitrogen protection for 4 hours to obtain a modified epoxy resin.

[0050] The construction process of the polymer modified colored anti-slip coating includes the following steps:

[0051] (1) Clean the dust on the road base surface and repair the original road surface damage to ensure that the road base surface is flat, clean and dry;

[0052] (2) Add 6 parts of color paste, 0.2 parts of interface agent and 0.2 parts of light stabilizer to 50 parts of modified epoxy resin in order by weight, stir mechanically for 10 minutes, then add 25 parts of isophorone diamine and stir mechanically for 10 minutes to obtain a polymer modified color anti-slip coating;

[0053] (3) Apply the polymer modified colored anti-skid coating described in step (2) to the road base surface, and simultaneously spread ceramic aggregate to a coating thickness of 2.5 mm; maintain for 1 hour and remove floating sand;

[0054] (4) Spray fluorocarbon topcoat and maintain for 4 hours before opening to traffic.

[0055] Example 2:

[0056] Preparation of modified epoxy resin:

[0057] (1) A mixture of 70 parts of epoxy resin (E51), 4 parts of isophorone diisocyanate and 10 parts of polypropylene glycol was placed in a reaction apparatus, heated to 60°C under nitrogen protection, and 5 parts of stannous octoate were added to carry out a first esterification reaction. The reaction was carried out for 4 hours to obtain a first esterification reaction liquid;

[0058] (2) After adding 10 parts of polypropylene glycol to the first esterification reaction liquid and mixing evenly, the system was heated to 80°C and a second esterification reaction was carried out under nitrogen protection for 5 hours to obtain a modified epoxy resin.

[0059] The construction process of the polymer modified colored anti-slip coating includes the following steps:

[0060] (1) Clean the dust on the road base surface and repair the original road surface damage to ensure that the road base surface is flat, clean and dry;

[0061] (2) 8 parts of color paste, 0.4 parts of interface agent and 0.5 parts of light stabilizer were added to 70 parts of modified epoxy resin in order by weight, and mechanically stirred for 15 minutes. Then, 30 parts of diethylenetriamine were added and mechanically stirred for 5 minutes to obtain a polymer-modified colored anti-slip coating;

[0062] (3) Apply the polymer modified colored anti-skid coating described in step (2) to the road base surface, and simultaneously spread ceramic aggregate to a coating thickness of 3 mm; maintain for 2 hours and remove floating sand;

[0063] (4) Spray fluorocarbon topcoat and maintain for 4 hours before opening to traffic.

[0064] Example 3:

[0065] Preparation of modified epoxy resin:

[0066] (1) A mixture of 65 parts of epoxy resin (E51), 7 parts of isophorone diisocyanate, and 8.5 parts of polypropylene glycol was placed in a reaction apparatus, heated to 60°C under nitrogen protection, and 3.5 parts of dibutyltin dilaurate were added to carry out a first esterification reaction. The reaction was continued for 3.5 hours to obtain a first esterification reaction liquid;

[0067] (2) After adding 8.5 parts of polypropylene glycol to the first esterification reaction liquid and mixing evenly, the system was heated to 80°C and a second esterification reaction was carried out under nitrogen protection for 4.5 hours to obtain a modified epoxy resin.

[0068] The construction process of the polymer modified colored anti-slip coating includes the following steps:

[0069] (1) Clean the dust on the road base surface and repair the original road surface damage to ensure that the road base surface is flat, clean and dry;

[0070] (2) 7 parts of color paste, 0.3 parts of interface agent and 0.3 parts of light stabilizer were added to 55 parts of modified epoxy resin in order by weight, and mechanically stirred for 10 minutes. Then, 20 parts of ethylenediamine were added and mechanically stirred for 10 minutes to obtain a polymer-modified colored anti-slip coating;

[0071] (3) Apply the polymer modified colored anti-skid coating described in step (2) to the road base surface, and simultaneously spread ceramic aggregate to a coating thickness of 3 mm; maintain for 1 hour and remove floating sand;

[0072] (4) Spray fluorocarbon topcoat and maintain for 4 hours before opening to traffic.

[0073] Comparative Example 1:

[0074] 6 parts of color paste and 0.3 parts of light stabilizer were added to 55 parts of commercially available epoxy resin (E51) in order by weight, and the mixture was mechanically stirred for 10 minutes. Then, 20 parts of ethylenediamine were added and mechanically stirred for 10 minutes to obtain a colored anti-slip coating.

[0075] Apply colored anti-skid paint to the road base surface, and spread ceramic aggregate simultaneously, with a coating thickness of 3mm; maintain for 1 hour and remove loose sand; spray fluorocarbon topcoat, maintain for 4 hours, and then open to traffic.

[0076] The elongation at break of the modified epoxy resins of Examples 1-3 and a commercially available epoxy resin (E51) were tested, as shown in Table 1.

[0077] The performance indicators of Examples 1-3 and Comparative Example 1 are shown in Table 2 with reference to the "Anti-Slip Coatings for Pavement" (JT / T 712-2008).

[0078] Table 1 Test results of epoxy resin elongation at break

[0079] project Comparative Example 1 Example 1 Example 2 Example 3 Elongation at break 4.1% 43% 51% 55%

[0080] As can be seen from Table 1, by comparison with Comparative Example 1, Examples 1 to 3 significantly improve the flexibility of the epoxy resin by grafting cyanate groups.

[0081] Table 2 Test results of coating physical and chemical properties

[0082]

[0083] As can be seen from Table 2, the base material adhesion of the anti-skid road coating of the present invention is significantly improved. In addition, after the artificial accelerated weathering test, the performance of the three embodiments of the present invention has changed. In summary, it can be concluded that the anti-skid road coating of the present invention has excellent weather resistance and base material adhesion, and meets the relevant technical requirements of the current specifications.

[0084] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the description of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A polymer-modified colored anti-slip coating, characterized in that: Made from the following components: 50-70 parts of modified epoxy resin, 20-30 parts of curing agent, 0.2-0.4 parts of interface agent, 0.2-0.5 parts of light stabilizer, 5 to 8 parts of color paste, The above parts are all by weight; The modified epoxy resin contains a cyanate group that is active and reacts with water to form a urea bond in outdoor environments. The preparation method of the modified epoxy resin is as follows: (1) placing a mixture of epoxy resin, isophorone diisocyanate, and polypropylene glycol in a reaction apparatus, heating the mixture to 60° C. under nitrogen protection, adding a catalyst to carry out a first esterification reaction, and obtaining a first esterification reaction liquid; (2) Adding the same mass of polypropylene glycol as in step (1) to the first esterification reaction liquid and mixing them evenly, heating the system to 80° C. and performing a second esterification reaction under nitrogen protection to obtain a modified epoxy resin.

2. The polymer-modified colored anti-slip coating according to claim 1, characterized in that: In step (1) of the modified epoxy resin preparation method, the mass ratio of epoxy resin, diisocyanate and polypropylene glycol is (60-70): (4-10): (8-10).

3. The polymer-modified colored anti-slip coating according to claim 1, characterized in that: The catalyst in step (1) of the modified epoxy resin preparation method is one of stannous isooctanoate, dibutyltin dilaurate and stannous octoate.

4. The polymer-modified colored anti-slip coating according to claim 1, characterized in that: In step (1) of the modified epoxy resin preparation method, the mass ratio of the epoxy resin to the catalyst is (60-70): (2-5).

5. The polymer-modified colored anti-slip coating according to claim 1, characterized in that: In the modified epoxy resin preparation method, the first esterification reaction time is 3 to 4 hours, and the second esterification reaction time is 4 to 5 hours.

6. The polymer-modified colored anti-slip coating according to claim 1, characterized in that: The curing agent is one or more of isophoronediamine, diethylenetriamine and ethylenediamine.

7. The polymer-modified colored anti-slip coating according to claim 1, characterized in that: The interface agent is polyether-modified polysiloxane.

8. The polymer-modified colored anti-slip coating according to claim 1, characterized in that: The light stabilizer is UV119.

9. A construction process for the polymer-modified colored anti-slip coating according to any one of claims 1 to 8, characterized in that: The steps include: (1) Clean the dust on the road base surface and repair the original road surface damage to ensure that the road base surface is flat, clean and dry; (2) adding a color paste, an interfacial agent, and a light stabilizer to the modified epoxy resin in order according to parts by weight, mechanically stirring for 10 to 15 minutes, and then adding a curing agent, mechanically stirring for 5 to 10 minutes, to obtain a polymer-modified colored anti-slip coating; (3) applying the polymer modified colored anti-skid coating described in step (2) to the road base surface, and simultaneously spreading ceramic aggregate to a coating thickness of 2 to 3 mm; curing for 1 to 2 hours, and removing floating sand; (4) Spray fluorocarbon topcoat and maintain for 2 to 4 hours before opening to traffic.

10. The construction process of the polymer modified colored anti-slip coating according to claim 9, characterized in that: The Mohs hardness of the ceramic aggregate is not less than 7, and the abrasion value is not more than 17%.

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