Polymer modified colored antiskid coating and construction process thereof

Abstract

The invention discloses a polymer modified colored antiskid coating which is prepared from the following components in parts by weight: 50-70 parts of modified epoxy resin, 20-30 parts of a curing agent, 0.2-0.4 part of an interface agent, 0.2-0.5 part of a light stabilizer and 5-8 parts of colored color paste. The problems that a conventional color protective coating is poor in bonding performance with a pavement, cracks, ages and the like are solved, epoxy resin is subjected to grafting modification through a chemical reaction grafting method, cyanate ester groups are introduced, the flexibility of the coating is improved, meanwhile, the epoxy resin cross-linked structure is remarkably increased through introduction of the cyanate ester groups, and the service life of the coating is prolonged. And the adhesion of the colored protective paint and the road base surface is further improved by the adhesion agent. The invention further discloses a construction process of the colored anti-skid coating, and the colored anti-skid coating has the characteristics of simple preparation process, low cost and the like.

Description

Technical Field

[0001] The 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-slip pavement at intersections, urban slow lanes, pedestrian bridges, bus stops, slopes, toll stations, 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 occurrence of accidents.

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

[0004] The colored anti-skid core is a coating material. After being uniformly mixed with the anti-skid aggregate curing agent, it is scraped or sprayed on 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] Currently, most coating materials on the market use epoxy and polyurethane colored coatings. Among them, polyurethane coatings are more expensive and the quality on the market varies greatly. Conventional epoxy resin coatings are prone to cracks, discoloration, and voids, which makes it impossible to guarantee the service life of colored anti-slip pavement. Summary of the invention

[0006] The present invention solves the problems of poor adhesion between conventional color protective coatings and road surfaces, cracking and aging. Through the method of chemical reaction grafting, the epoxy resin is grafted and modified to introduce cyanate groups to increase the flexibility of the coating. At the same time, the introduction of cyanate groups significantly increases the cross-linking structure of the epoxy resin, and together with the interface agent, the adhesion between the color protective coating and the road base surface is further improved.

[0007] In order to solve the above technical problems, a technical solution adopted by the present invention is: a polymer-modified colored anti-slip coating, which is made of the following components: 50~70 parts of modified epoxy resin, 20~30 parts of curing agent, 0.2~0.4 parts of interface agent, Light stabilizer 0.2~0.5 parts, Color paste 5~8 parts, The above parts are all by weight.

[0008] The modified epoxy resin contains a cyanate group, and 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 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; (2) Add the first esterification reaction liquid to the polypropylene glycol of the same mass as in step (1) and mix them evenly, then heat the system to 80° C. and carry out a second esterification reaction under nitrogen protection to obtain a modified epoxy resin.

[0009] 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).

[0010] Preferably, the catalyst in step (1) of the modified epoxy resin preparation method is one of stannous isooctanoate, dibutyltin dilaurate and stannous octoate.

[0011] Preferably, in step (1) of the modified epoxy resin preparation method, the mass ratio of epoxy resin to catalyst is (60-70):(2-5).

[0012] Preferably, in the steps of 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.

[0013] Preferably, the curing agent is one or more of isophoronediamine, diethylenetriamine and ethylenediamine.

[0014] Preferably, the interface agent is polyether-modified polysiloxane.

[0015] Preferably, the light stabilizer is UV 119.

[0016] The present invention also provides a construction process of the polymer-modified colored anti-slip coating, comprising the following steps: (1) Clean the dust on the road surface and repair the original road surface damage to ensure that the road surface is flat, clean and dry; (2) adding a color paste, an interface 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) Scrape and 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 to 3 mm; maintain for 1 to 2 hours, and remove floating sand; (4) Spray fluorocarbon topcoat and maintain for 2 to 4 hours before opening to traffic.

[0017] Preferably, the Mohs hardness of the ceramic aggregate is not less than 7, and the abrasion value is not more than 17%.

[0018] The beneficial effects of the present invention are as follows: different from the prior art, the present invention introduces cyanate groups by chemically grafting modified epoxy resin, which can improve the flexibility of the epoxy resin coating and avoid cracking caused by 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 effect 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

[0020] The present invention will be further understood by the following specific examples and comparative examples of the present invention, but they are not intended to limit the present invention.

[0021] 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 weather resistance of the polymer modified colored anti-skid coating all adopt the standards specified in "Pavement Anti-skid Coatings" (JT / T 712-2008).

[0022] Sources of raw materials in the following examples: Epoxy resin (E51): Jiangyin Wanqian Chemicals Co., Ltd.; Isophorone diisocyanate: Shanghai Hongzhuang Chemical Technology Co., Ltd.; Polypropylene glycol: Shanghai Hongzhuang Chemical Technology Co., Ltd.; Dibutyltin dilaurate: Shandong Maofa Chemical Co., Ltd.; Stannous octoate: Shandong Poly Chemical Co., Ltd. Stannous 2-octanoate: Shandong Poly Chemical Co., Ltd. Isophorone diamine: Shanghai Hongzhuang Chemical Technology Co., Ltd.; Diethylenetriamine: Jiangsu Rayen Environmental Protection Technology Co., Ltd.; Ethylenediamine: Jiangsu Rayen Environmental Protection Technology Co., Ltd.; Polyether modified polysiloxane: Evonik Specialty Chemicals (Shanghai) Co., Ltd.; UV 119: Shenzhen Longdi Chemical Co., Ltd.; In the following examples, all reagents are expressed in parts by weight.

[0023] Embodiment 1: Preparation of modified epoxy resin: (1) placing a mixture of 60 parts of epoxy resin (E51), 6 parts of isophorone diisocyanate and 8 parts of polypropylene glycol in a reaction device, heating the mixture to 60° C. under nitrogen protection, adding 2 parts of dibutyltin dilaurate to carry out a first esterification reaction, and reacting the mixture for 4 hours to obtain a first esterification reaction liquid; (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.

[0024] The construction process of the polymer modified colored anti-slip coating includes the following steps: (1) Clean the dust on the road surface and repair the original road surface damage to ensure that the road surface is flat, clean and dry; (2) Adding 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, mechanically stirring for 10 minutes, and then adding 25 parts of isophorone diamine, mechanically stirring for 10 minutes, to obtain a polymer-modified colored anti-slip coating; (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 2.5 mm; maintain for 1 hour, and remove floating sand; (4) Spray fluorocarbon topcoat and maintain for 4 hours before opening to traffic.

[0025] Embodiment 2: Preparation of modified epoxy resin: (1) placing a mixture of 70 parts of epoxy resin (E51), 4 parts of isophorone diisocyanate and 10 parts of polypropylene glycol in a reaction device, heating the mixture to 60° C. under nitrogen protection, adding 5 parts of stannous octoate to carry out a first esterification reaction, and reacting the mixture for 4 hours to obtain a first esterification reaction liquid; (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.

[0026] The construction process of the polymer modified colored anti-slip coating includes the following steps: (1) Clean the dust on the road surface and repair the original road surface damage to ensure that the road surface is flat, clean and dry; (2) Add 8 parts of color paste, 0.4 parts of interface agent and 0.5 parts of light stabilizer to 70 parts of modified epoxy resin in order by weight, stir mechanically for 15 minutes, then add 30 parts of diethylenetriamine, stir mechanically for 5 minutes, and obtain a polymer modified color anti-slip coating; (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 3 mm; maintain for 2 hours, and remove floating sand; (4) Spray fluorocarbon topcoat and maintain for 4 hours before opening to traffic.

[0027] Embodiment 3: Preparation of modified epoxy resin: (1) placing a mixture of 65 parts of epoxy resin (E51), 7 parts of isophorone diisocyanate and 8.5 parts of polypropylene glycol in a reaction device, heating the mixture to 60° C. under nitrogen protection, adding 3.5 parts of dibutyltin dilaurate to carry out a first esterification reaction, and reacting the mixture for 3.5 hours to obtain a first esterification reaction liquid; (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.

[0028] The construction process of the polymer modified colored anti-slip coating includes the following steps: (1) Clean the dust on the road surface and repair the original road surface damage to ensure that the road surface is flat, clean and dry; (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, and then 20 parts of ethylenediamine were added, and mechanically stirred for 10 minutes to obtain a polymer-modified colored anti-slip coating; (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 3 mm; maintain for 1 hour, and remove floating sand; (4) Spray fluorocarbon topcoat and maintain for 4 hours before opening to traffic.

[0029] Comparative Example 1: According to weight parts, 6 parts of color paste and 0.3 parts of light stabilizer were added in sequence to 55 parts of commercially available epoxy resin (E51), and the mixture was mechanically stirred for 10 minutes. Subsequently, 20 parts of ethylenediamine were added, and the mixture was mechanically stirred for 10 minutes to obtain a colored anti-slip coating.

[0030] Scrape and 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 floating sand; spray fluorocarbon topcoat, maintain for 4 hours, and then open to traffic.

[0031] The elongation at break of the modified epoxy resins of Examples 1-3 and the commercially available epoxy resin (E51) were tested respectively, as shown in Table 1.

[0032] The performance indicators of Examples 1-3 and Comparative Example 1 are shown in Table 2 with reference to "Anti-skid Paint for Pavement" (JT / T 712-2008).

[0033] Table 1 Test results of elongation at break of epoxy resin project Comparative Example 1 Example 1 Example 2 Example 3 Elongation at break 4.1% 43% 51% 55% It can be seen from Table 1 that, by comparison with Comparative Example 1, the flexibility of the epoxy resins in Examples 1 to 3 is significantly improved by grafting cyanate groups.

[0034] Table 2 Test results of coating physical and chemical properties It can be seen from Table 2 that 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, 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.

[0035] 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 specification 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, Light stabilizer 0.2~0.5 parts, Color paste 5~8 parts, The above parts are all by weight. The modified epoxy resin contains a cyanate group. 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 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; (2) Add the first esterification reaction liquid to the polypropylene glycol of the same mass as in step (1) and mix them evenly, then heat the system to 80° C. and carry out 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 epoxy resin to 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 surface and repair the original road surface damage to ensure that the road surface is flat, clean and dry; (2) adding a color paste, an interface 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) Scrape and 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 to 3 mm; maintain for 1 to 2 hours, and remove floating sand; (4) Spray fluorocarbon topcoat and maintain for 2 to 4 hours before opening to traffic.

10. The polymer modified colored anti-slip coating construction process 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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