Composite carbon black material for artificial stone as well as preparation method and application of composite carbon black material

Abstract

The invention provides a composite carbon black material for artificial stone as well as a preparation method and application thereof, the composite carbon black material for artificial stone comprises the following raw materials in parts by weight: 10 parts of carbon black and 3 parts of a siloxane complexing agent, the moisture content of the composite carbon black material is less than 1%, and the particle size is less than or equal to 10 microns. The composite carbon black material for the artificial stone can be applied to production of quartz plates, and the composite carbon black accounts for 2-6% of the mass of the quartz plates. According to the composite carbon black material for the artificial stone as well as the preparation method and the application of the composite carbon black material, the compatibility with a quartzite base material can be enhanced, and the water absorption rate of a plate is reduced, so that the anti-knock performance and the waterproof and impermeable performance are improved.

Description

Technical Field

[0001] This invention relates to the field of building materials, specifically to a composite carbon black material for artificial stone, its preparation method, and its application. Background Technology

[0002] Artificial stone boasts advantages such as adjustable colors and patterns, seamless color matching in large-area paving, utilization of scraps from natural stone quarries, and energy efficiency and environmental friendliness, making it a significant direction for the development of the decorative stone industry. Artificial stone is a type of stone made by using high-molecular polymers, inorganic binders, or mixtures of both as adhesives, with natural stone fragments (powders), aluminum hydroxide powder, and other raw materials as main ingredients, along with pigments and other auxiliary agents, through processes such as mixing, coagulation, and curing.

[0003] Zero-silica quartz slabs have unique advantages in the decoration field because they do not contain silica additives. However, dark-colored (especially black) zero-silica quartz slabs are prone to cracking due to insufficient compatibility between carbon black and the substrate and high water absorption rate during production and use. This can cause uneven internal stress caused by water penetration. In addition, their poor waterproof and seepage-proof performance limits their application range. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies, this invention provides a composite carbon black material for artificial stone, which can enhance compatibility with quartz stone substrates, reduce the water absorption rate of the slabs, and thus improve explosion resistance and waterproof and seepage prevention performance.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A composite carbon black material for artificial stone comprises the following raw materials in parts by weight: 10 parts carbon black, 3 parts siloxane composite agent, the moisture content of the composite carbon black material is less than 1%, and the particle size is less than or equal to 10 micrometers.

[0007] The present invention also provides a method for preparing the above-mentioned composite carbon black material for artificial stone, comprising the following steps:

[0008] S1. Add 10 parts of carbon black to a mixing device, add 3 parts of siloxane composite agent while stirring, stir for 30-40 minutes to obtain a mixture;

[0009] S2. Place the mixture in a drying device and dry it at 80-100℃ for 8-10 hours until the moisture content of the mixture is less than 1%;

[0010] S3. Place the dried mixture into a grinding device and grind it until the particle size of the mixture is less than or equal to 10 micrometers to obtain composite carbon black.

[0011] The present invention also provides the application of the above-mentioned composite carbon black material for artificial stone, wherein the composite carbon black is added to the quartz stone raw material, mixed evenly and then pressed into a quartz stone slab, and the composite carbon black accounts for 2-6% of the mass of the quartz stone slab.

[0012] Optionally, the quartz stone raw material is black quartz stone raw material, and the composite carbon black accounts for 2-5% of the mass of the quartz plate.

[0013] Furthermore, the black quartz stone raw material includes 80 parts by weight of quartz sand, 10 parts of resin, and 2 parts of additives.

[0014] Optionally, the quartz stone raw material is white quartz stone raw material, and the composite carbon black accounts for 3-6% of the mass of the quartz plate.

[0015] Compared with the prior art, the present invention has the following beneficial technical effects:

[0016] 1. Improved explosion-proof performance of the slab. Through the full compounding of the composite agent and carbon black, the interfacial bonding force between carbon black and quartz stone substrate is enhanced, reducing internal stress concentration caused by poor material compatibility, and significantly reducing the risk of quartz stone slab explosion.

[0017] 2. Improved waterproof performance of the board. The composite carbon black surface forms a stable protective layer, effectively blocking moisture penetration, reducing the water absorption rate of the board, and improving its waterproof and anti-seepage performance.

[0018] 3. Strong process applicability. The compounding, drying, crushing, and grinding processes are simple and controllable, making them suitable for industrial production. Detailed Implementation

[0019] Numerous specific details are set forth in the following description to provide a full understanding of the invention. However, the invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0020] Example 1

[0021] A composite carbon black material for artificial stone comprises the following raw materials: 500g carbon black, 150g siloxane composite agent, the moisture content of the composite carbon black material is less than 1%, and the particle size is less than or equal to 10 micrometers.

[0022] The preparation method of the above-mentioned composite carbon black material for artificial stone is as follows:

[0023] S1. Add 500g of carbon black to a mixing device, add 150g of siloxane composite agent while stirring, stir for 35 minutes to obtain a mixture;

[0024] S2. Place the mixture in a drying device and dry it at 90°C for 9 hours until the moisture content of the mixture is less than 1%;

[0025] S3. Place the dried mixture in a three-roll mill and grind it until the particle size of the mixture is less than or equal to 10 micrometers to obtain composite carbon black.

[0026] The above-mentioned composite carbon black material for artificial stone is applied to black zero-silica quartz slabs, and the preparation steps are as follows:

[0027] Composite carbon black is added to the black quartz stone raw material. The composite carbon black accounts for 5% of the mass of the quartz slab. The black quartz stone raw material includes 800g of quartz sand, 100g of resin, and 20g of additives. After all the raw materials are mixed evenly, they are pressed into 200mm×200mm×6mm slabs and cured to obtain black zero-silica quartz stone slabs.

[0028] Performance tests showed that the water absorption rate of this black zero-silica quartz slab was reduced to below 2.5%, and it showed no signs of cracking or breakage after 50 cycles of hot and cold cycling (-20℃ to 60℃).

[0029] Example 2

[0030] The composite carbon black material for artificial stone and its preparation method are the same as in Example 1, except that this composite carbon black material is applied to white quartz stone slabs, and the preparation steps are as follows:

[0031] Composite carbon black is added to the white quartz stone raw material, with the composite carbon black accounting for 4% of the mass of the quartz slab. After all the raw materials are mixed evenly, they are pressed into 200mm×200mm×6mm slabs and cured to obtain white quartz stone slabs.

[0032] Performance tests showed that the white quartz stone slab had a smooth surface with no obvious defects, and its stain resistance was improved by more than 20%.

[0033] Effect verification test

[0034] I. Experimental Objective

[0035] The study verified the effect of the composite carbon black material prepared in this invention on improving the anti-explosion properties (stability of thermal cycling), water absorption rate and waterproofness of black zero-silica quartz slabs, and compared it with untreated carbon black and conventional slabs.

[0036] II. Experimental Materials and Equipment

[0037] Raw materials: carbon black (particle size 20-30nm), siloxane composite agent (industrial grade), zero-silica quartz substrate (90% glass sand + 10% modified resin, without silica additives), deionized water.

[0038] Equipment: High-speed mixer, drying oven, crusher, three-roll mill, pressure molding machine, thermal cycling test chamber, water absorption meter.

[0039] III. Experimental Grouping

[0040] 1. Experimental group: The composite carbon black material prepared in Example 1 of this invention was used.

[0041] 2. Comparison Group 1: Untreated pure carbon black (without any composite treatment).

[0042] 3. Comparison Group 2: Carbon black with low proportion of composite treatment (the amount of composite agent is 10% of the mass of carbon black, and other processes are the same as the experimental group).

[0043] IV. Test Procedure

[0044] 1. Experimental Group

[0045] (1) Composite treatment: Weigh 500g of carbon black and add it to a high-speed mixer. Slowly add 150g of siloxane composite agent at a speed of 1200r / min and continue stirring for 35 minutes until the mixture is uniform.

[0046] (2) Drying: Place the mixture in an oven and dry at 85°C for 9 hours to remove free moisture and obtain dry composite carbon black particles;

[0047] (3) Crushing and grinding: The dried particles are crushed to 80 mesh by a crusher and then ground by a three-roll mill (gap 8μm) to obtain fine composite carbon black slurry (particle size ≤10μm).

[0048] 2. Control Group 1

[0049] Take 500g of pure carbon black directly, without compounding, and grind it into a slurry with the same particle size as the experimental group.

[0050] 3. Control Group 2

[0051] Weigh 500g of carbon black, add 50g of siloxane composite agent (10% dosage), and follow the same steps as the experimental group to prepare a low-proportion composite carbon black slurry.

[0052] 3. Preparation of Black Zero-Silica Quartz Slabs

[0053] (1) Add the carbon black slurry of the corresponding group to the zero-silica quartz stone substrate (800g quartz sand, 100g modified resin, 20g additives) at a ratio of 7% (relative to the total mass of the substrate) and stir for 10 minutes until uniform.

[0054] (2) Press the sheet metal blank with a pressure of 20 MPa using a pressure forming machine to obtain a sheet metal blank of 200 mm × 200 mm × 6 mm;

[0055] (3) Curing in a 60℃ curing oven for 24 hours yields the finished board.

[0056] 4. Performance Testing

[0057] (1) Water absorption test: According to GB / T 3810.3-2016 standard, the sample was soaked in deionized water for 24 hours and the water absorption rate was calculated;

[0058] (2) Cold and hot cycle explosion resistance test: The sample was placed in a cold and hot cycle chamber. One cycle was frozen at -20℃ for 2 hours and baked at 60℃ for 2 hours. A total of 50 cycles were performed to observe whether cracking or warping (explosion) occurred.

[0059] (3) Waterproof and seepage-proof test: Add 0.5 mL of deionized water to the sample surface, let it stand for 24 hours, and observe whether the water seeps in (whether the back is wet).

[0060] V. Test Results

[0061] Table 1 Comparison of Results of Three Groups of Experiments

[0062] Test Project experimental group Comparison Group 1 Comparison Group 2 Water absorption rate (%) 2.3 6.8 4.5 State after 50 cycles of heating and cooling No cracks, no warping Edge cracks and board warping Local microcracks Waterproof and seepage-proof Dry on the back Moist on the back Slightly damp on the back

[0063] VI. Results Analysis

[0064] 1. The water absorption rate of the experimental group was significantly lower than that of the control group, indicating that the protective layer formed by the composite treatment effectively blocked water penetration;

[0065] 2. After thermal cycling, the experimental group did not experience any plate bursting, while the control group showed obvious cracking due to poor compatibility between carbon black and the substrate and internal stress concentration, proving that the present invention can effectively improve the explosion resistance.

[0066] 3. In the waterproof penetration test, the experimental group performed best, further verifying the role of composite treatment in improving waterproof performance.

[0067] In summary, this invention, by treating carbon black with a 30% siloxane composite agent, can significantly improve the explosion resistance and water resistance of black zero-silica quartz slabs, with better results than untreated and low-ratio treatment solutions.

[0068] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. However, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A composite carbon black material for artificial stone, characterized in that: The raw materials include the following parts by weight: 10 parts carbon black, 3 parts siloxane composite agent, and the composite carbon black material has a moisture content of less than 1% and a particle size of less than or equal to 10 micrometers.

2. A method for preparing a composite carbon black material for artificial stone, characterized in that, Includes the following steps: S1. Add 10 parts of carbon black to a mixing device, add 3 parts of siloxane composite agent while stirring, stir for 30-40 minutes to obtain a mixture; S2. Place the mixture in a drying device and dry it at 80-100℃ for 8-10 hours until the moisture content of the mixture is less than 1%; S3. Place the dried mixture into a grinding device and grind it until the particle size of the mixture is less than or equal to 10 micrometers to obtain composite carbon black.

3. The application of the composite carbon black material for artificial stone as described in claim 1, characterized in that: Composite carbon black is added to the quartz stone raw material, mixed evenly, and then pressed into quartz stone slabs. The composite carbon black accounts for 2-6% of the mass of the quartz stone slab.

4. The application of the composite carbon black material for artificial stone according to claim 3, characterized in that: The raw material for the quartz stone is black quartz stone, and the composite carbon black accounts for 2-5% of the mass of the quartz slab.

5. The application of the composite carbon black material for artificial stone according to claim 4, characterized in that: The raw material for black quartz stone includes 80 parts by weight of quartz sand, 10 parts by weight of resin, and 2 parts by weight of additives.

6. The application of the composite carbon black material for artificial stone according to claim 3, characterized in that: The raw material for the quartz stone is white quartz stone, and the composite carbon black accounts for 3-6% of the mass of the quartz slab.