Performance characteristics and application of waterborne nano-ceramic coatings for new environmentally friendly decorative materials

Date of issue:2022-04-29 00:00 Source:http://en.cn-stg.com Click:

Summary:As technology advances With the rapid development of the national economy, people's awareness of environmental protection is increasing, the requirements for health are getting higher and higher, and environmental protection regulations are becoming more and more perfect.

Keywords:Waterborne Ceramic Coatings; Nano ; Fire retardant; Energy saving

1. Preface

With the rapid development of urban construction and rail transit construction in China, tunnels, gymnasiums, subway stations and other public places The construction of the building is increasing day by day, the demand for light building decorative panels is increasing, and the quality requirements are getting higher and higher. Now not only good color decoration is required, but also environmental protection, high hardness, scratch resistance, fire retardant, good weather resistance, easy cleaning and other performance requirements. Since traditional solvent-based coatings can no longer meet new performance requirements, new water-based nano-ceramic coatings have launched new environmentally friendly coatings that meet market demand through continuous technological innovation and improvement.

2. Performance characteristics of water-based nano-ceramic coatings

2.1 Environmentally Friendly

Water-based nano-ceramic coatings use water as a solvent, saving a lot of resources; eliminating the fire hazard during construction; In the production process, no organic solvent is added, and no harmful or pathogenic materials such as atmospheric toxic pollutants HAJP (such as benzene, glycol ether, etc.), heavy metals, free, etc. are added, which improves the working environment conditions. After construction, there is no toxic gas overflow, which is non-toxic and non-polluting to the environment and human body, and the effect of saving resources is remarkable.

2.2 Incombustibility

Stujia water-based nano-ceramic coating has been tested by the National Fire Protection Material Inspection Center, and its flammability is in accordance with the GB8624-2012 standard , In the product smoke density, smoke tip height, smoke humidity and the average value of the remaining length of combustion have reached and exceeded the A1 level non-combustible standard. Its good non-combustible performance can provide good protection for public places, and can reduce the harm caused by fire. No thick smoke and no poisonous gas can save time for personnel to escape and improve the safety factor. Fully meet the fire protection design requirements of decoration materials such as subway stations and tunnels.

2.3 Excellent coating performance

Water-based nano-ceramic coatings are environmentally friendly coatings diluted with water, with outstanding performance and high hardness: up to 6H- 9H; high wear resistance; excellent scratch resistance; high temperature resistance, up to 600℃; high weather resistance (over 30 years); QUV aging test 4000 h; damp heat resistance, corrosion resistance; acid and alkali resistance , salt, solvent medium corrosion. And implement the national standard GB/T23443-2009 "Aluminum Veneer for Architectural Decoration", the measured data of performance testing is shown in Figure 1:

The performance characteristics and applications of water-based nano-ceramic coatings for new environmentally friendly decorative materials Apply

2.4 High self-cleaning performance

Water-based nano-ceramic paint film is uniform and flat. Good flattening property; inner cavity, weld seam, edges and corners, and edge parts can be coated with a certain thickness of coating film, which has good protection. The coating can eliminate static electricity, is not easy to generate electrostatic adsorption, has good non-stick performance, and is therefore widely used in the kitchenware and small household appliance industries. When used as building exterior curtain wall paint, the curtain wall can be kept clean only by natural washing and purification of rainwater, saving the cost of curtain wall cleaning.

3. Performance comparison with fluorocarbon coatings and enamel steel plates

Water-based nano-ceramic coatings and fluorocarbon coatings both implement the national standard GB/T23443-2009 "Aluminum Sheets for Architectural Decoration" However, due to the stricter environmental protection policies implemented by the state in recent years, fluorocarbon aluminum panels made of fluorocarbon coatings will cause high pollution during production, and currently belong to the high pollution and high environmental risk products named by the state. Enamelled steel plate is also a high energy consumption product due to the extremely high energy consumption in the production process. Based on the current market building curtain wall materials are mainly composed of fluorocarbon aluminum plate, enamel steel plate and ceramic aluminum veneer made of water-based nano-ceramic coatings, so the following material performance comparisons are made:

Number	project	Fluorocarbon Aluminum Sheet	Enamel Steel	Porcelain aluminum veneer
1	Environmental Health	National Environmental Protection Named High Pollution High Environmental Risk Products	Traditional products, high power consumption	New water-based nano-ceramic coatings, industrial policies focus on encouraging products, very low VOC emissions
2	Base Material	Aluminum	Steel	Aluminum plate
3	Substrate Density	2710kg/m3	7850kg/m3	2710kg/m3
4	Cure Temperature	180-250℃, low power consumption	Above 850℃, high power consumption	180-250℃, low power consumption
5	Hardness	H-2H	9H	6H-9H
6	Salt spray resistance	General	The enamel layer is easy to collapse and fall off after being impacted, exposing the substrate and easy to corrode.	In the case of damage to the coating, there is still an anti-corrosion layer to protect the substrate, which is not easy to corrode.
7	Wearability	best	Excellent	Excellent
8	temperature resistance	<260℃	>450℃	>600℃
9	Weather Resistant	good weather resistance	good weather resistance	Excellent weatherability
10	Heat and Cold Shock Resistant	better	Poor	better
11	Scratch Resistance	Severe scratches	No Scratches - Minor Scratches	No Scratches - Minor Scratches
12	Shock resistance	The coating has good impact resistance and not easy to break	The enamel layer is thick, and it is easy to collapse and fall off, exposing the substrate.	The particle size of the coating is micro-nano, and it is not easy to fall off after being impacted.
13	Fire Rating	A2 flammable	A1 class non-combustible	A1 class non-combustible
14	Fire performance	Temperature resistance, soft at high temperature, easy to decompose, producing harmful smoke	non-flammable, smoke-free, non-toxic	non-flammable, smoke-free, non-toxic, not afraid of cigarette butts
15	High temperature toxicity	Organic coatings Release toxic gases at high temperatures	Inorganic coating High temperature without any toxic gas release	Inorganic coating High temperature without any toxic gas release
16	Glossy	matte	Highlight	matte, glossy
17	Colors	colors limited	Can only use high temperature paint, color is limited	Colorful
18	Self-cleaning	General	General	Easy to clean, easy to erase with markers, good anti-graffiti and anti-paste performance
19	Painting	Pre-treatment chrome, three coats and two bakes, more complicated	It has high requirements on the substrate, generally high carbon cast iron is used, due to the large thermal expansion and contraction of the substrate during high temperature curing , the yield is low	Sandblasted
20	Construction	Three coats and one bake, the construction is more complicated	Three painting and two baking, complex	One coat and one bake or two coats and one bake, easy to apply
21	Installation	The board itself is light and dry-hanging Easy to install	The board itself is heavy and difficult to transport and install	The board itself is lighter, and the dry-hanging installation is simple and convenient
22	Integrated Social Benefits	relatively low	relatively low	relatively tall

According to the above performance comparison, the water-based nano-ceramic coatings combine the characteristics of organic and inorganic coatings, and the construction is biased towards organic coatings , The coating performance is inclined to inorganic coating, the performance is as good as that of enamel steel plate, the construction is convenient, and the cost is low. In the fierce market competition, it is bound to become a new trend in the development of the water-based coating industry.

4. Application of water-based nano-ceramic coatings

Nowadays, "energy saving and environmental protection" has become an industrial policy of the state to encourage enterprise development. Enterprises have seized this opportunity to strengthen the concept of environmental protection, develop green products, expand the green market, and establish an environmental protection image in order to win the first opportunity in the future market. Under this environment, companies have turned to "water-based", optimistic about the prospects of the water-based market, taking environmental protection as their responsibility, attaching importance to the production of non-polluting products, attaching importance to the quality of the working and living environment, and advocating green consumption. A huge driving force for the development of China's coatings industry. Therefore, the promotion and application of water-based nano-ceramic coatings will drive the entire coating industry to a new level.

Water-based nano-ceramic coatings, due to factors such as excellent product performance, convenient construction and low cost, have been gradually It is well known that the water-based nano-ceramic coatings produced by Stuttgart have been widely used:a) Subway station interior decoration project (cases: Shenyang Metro, Tianjin Metro, Hefei Metro, Urumqi Metro, Chengdu Metro, etc.);b)Tunnel interior decoration board: Guiyang Tuyunguan Tunnel;c) Gymnasium interior decoration project: Tianjin People's Gymnasium

Now the research, production and application of water-based nano-ceramic coatings are advancing at an unprecedented speed. Building materials industry standard drafted by Shenzhen Situjia Technology Co., Ltd.The quasi-JC/T2349-2018 "Porcelain Aluminium Sheet for Architectural Decoration" was officially implemented on September 1, 2018. With the continuous improvement of new standards and new technologies, the market space for water-based coatings has been further expanded. Especially due to the rising price of raw materials, the price of oil-based coatings is higher than that of some water-based coatings in the market, which is also a rare opportunity to boost the development of water-based coatings.

5. Summary

In recent years, the harm of volatile organic compounds in coatings to the environment and human body has attracted increasing attention. Compared with traditional solvent-based coatings, water-based coatings can greatly reduce VOC emissions and effectively reduce the impact on the environment. It also helps to reduce the potential probability of occupational diseases, reduce fire risks and hidden dangers in storage, simplify and reduce the process and cost of enterprise ventilation, water treatment, etc. Therefore, the development of water-based coatings is in an important strategic opportunity period. Under the requirements of policy orientation and environmental protection regulations, my country's coatings industry will inevitably move towards the road of environmental protection and water-based coatings, and water-based coatings will also usher in a broader development space.

Reference: National Standard GB8624-2012 "Classification of Combustion Properties of Building Materials and Products"

National Standard GB/T23443-2009 "Aluminum Veneer for Architectural Decoration"

Building Materials Industry Standard JC/T2349-2018 "Porcelain Aluminium Sheet for Architectural Decoration"