Coating material containing agilawood component as well as preparation method and application of coating material

Abstract

The invention discloses a coating material containing an agilawood component and a preparation method and application thereof, and belongs to the technical field of coating materials, a coating is composed of agilawood powder, paprika powder, natural glutinous rice glue, agilawood hydrolat and water, diatomite or beeswax emulsion can be selectively added, the oil content of the agilawood powder is larger than or equal to 15%, linalool is larger than or equal to 1.2 mg / g, and the agilawood powder is subjected to airflow crushing treatment; the glutinous rice glue is prepared by hydrolyzing starch, and the solid content is 25-35%; agilawood hydrolat is extracted through steam distillation, the concentration of agilawood alcohol is larger than or equal to 0.8 mg / mL, during preparation, raw materials are mixed and then stirred for 10-20 min at the high speed of 2500-3500 r / min at the temperature of 20-40 DEG C to form a stable system, the VOC content of the coating is smaller than 10 g / L, the coating meets the GB18582-2020 standard, the escherichia coli inhibition rate and the staphylococcus aureus inhibition rate are 95% and 98% respectively, the initial aroma intensity is 8.5 min (10 min), the coating is kept for 7.2 min after 12 months, the adhesive force is 0 grade, the pencil hardness is 2-4 H, and the coating is suitable for being applied to the field of medical care. The coating has the advantages of no less than 5000 times of washing resistance, no less than 91% of performance retention rate after 500 hours of ultraviolet aging, and suitableness for coating wall surfaces, furniture and handicrafts, and has the characteristics of aromatic physical therapy, antibiosis and environmental protection.

Description

Technical Field

[0001] A coating material containing agarwood components, a preparation method thereof, and an application thereof. The present invention belongs to the technical field of coating materials, and specifically relates to a coating material containing agarwood components, a preparation method thereof, and the technical field of application thereof. Background Art

[0002] Environmental bottlenecks: Traditional solvent-based paints generally have VOC levels exceeding 100g / L. For example, polyurethane paints contain benzene, which releases harmful gases over the long term. Water-based paints contain less than 30% natural ingredients and rely on synthetic resins, resulting in poor biodegradability. Functionality limitations: Commercially available coatings only provide basic protection. For example, diatom mud easily saturates with formaldehyde (adsorption capacity ≤ 1.5mg / g), and lime paint has an antibacterial rate against E. coli of less than 30%, lacking the combined benefits of "aromatherapy + long-term protection."

[0003] Barriers to the application of natural ingredients: Agarwood powder is highly hydrophobic and has a high oil content (≥15%). It is difficult to disperse it evenly using the traditional stirring process (rotation speed ≤1000r / min). The particle size D90 is greater than 20μm, and the aroma drying loss rate is greater than 60%. Traditional glutinous rice glue has weak adhesion (cross-hatch adhesion level 2, tensile strength <1.0MPa), and the interfacial interaction force with the agarwood powder is insufficient, causing the coating to crack and fall off easily. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the existing defects and provide a coating material containing agarwood components and its preparation method and application, thereby solving the problems of difficult dispersion of agarwood, volatile aroma and insufficient bonding performance of glutinous rice glue through formula innovation and process optimization, and realizing efficient utilization and performance synergy of natural ingredients in the coating.

[0005] To achieve the above object, the present invention provides the following technical solutions: A coating material containing agarwood components is prepared from the following raw materials in parts by weight: 1-3 parts of agarwood powder (80 mesh), 0.005-0.03 parts of pepper powder, 2-6 parts of natural glutinous rice glue, 3-9 parts of agarwood hydrosol, and 2-6 parts of water; the agarwood powder is derived from the genus Aquilaria of the Thymelaeaceae family, has an oil content of ≥15%, and a linalool content of ≥1.2 mg / g.

[0006] As a preferred technical solution of the present invention, agarwood powder complies with the "Pharmacopoeia of the People's Republic of China (2020)", T / HFS002-2024 and DB / T421-2017 standards. Artificial agarwood formation adopts physical trauma stimulation method (including drilling method, cutting method, fire hole method, burning method, nailing method, skin knocking method, branch / root breaking method, etc.), and the agarwood formation time is 12-36 months.

[0007] As a preferred technical solution of the present invention, the agarwood powder is processed to 80 mesh using airflow crushing technology, with a specific surface area of ​​5-8m² / g and a moisture content of ≤8%.

[0008] As a preferred technical solution of the present invention, the natural glutinous rice glue is prepared by vacuum concentration after hydrolysis of glutinous rice starch by α-amylase, with a solid content of 25%-35% and a pH value of 6.5-7.5.

[0009] As a preferred technical solution of the present invention, the agarwood hydrosol is a condensate extracted from agarwood by steam distillation, the linalool content is ≥0.8 mg / mL, and the distillation temperature during the extraction process is ≤90°C.

[0010] As a preferred technical solution of the present invention, 5-10 parts of diatomaceous earth or 0.5-1 part of beeswax emulsion can also be added; the coating has a pH value of 6.5-7.5, a VOC content of <10g / L, a particle size of Sichuan pepper powder <100 mesh, and contains Sichuan pepper amide ≥2%.

[0011] As a preferred technical solution of the present invention, a method for preparing a coating material comprises: (1) Mix agarwood hydrosol, water and natural glutinous rice glue to form an aqueous phase, filter through a 50-mesh filter cloth, and add agarwood powder and pepper powder under low-speed stirring; (2) Stir at 2500-3500 r / min for 10-20 minutes at 20-40°C.

[0012] As a preferred technical solution of the present invention, a planetary mixer is used, the stirring paddle is a combination of a frame paddle and a dispersion disk, the stirring temperature is controlled at 25-30°C, and the sedimentation volume ratio is ≥0.95.

[0013] As a preferred technical solution of the present invention, the coating material is used for coating the surface of walls, furniture or handicrafts, with a coating thickness of 0.5-1.5mm, and is surface dried for 2-6 hours at 18-36°C to form a coating hardness of 2H-4H and a wear resistance of ISO2409 standard 0 As a preferred technical solution of the present invention, after the coating is subjected to UV aging for 500 hours, the fragrance intensity retention rate is ≥91.8%, the antibacterial rate retention rate is ≥96.8%, and the adhesion level remains unchanged.

[0014] Compared with the prior art, the beneficial effects of the present invention are: the coating material is environmentally friendly, the VOC content is less than 10g / L, and it complies with the GB18582-2020 interior decoration standard; it has diverse functions, such as aromatherapy, antibacterial, and antioxidant functions, and the antibacterial rates against Escherichia coli and Staphylococcus aureus are 95% and 98% respectively, and the fragrance is slowly released for a long time, with an initial fragrance intensity of 8.5 points (out of 10 points) and maintaining 7.2 points after 12 months; it has excellent mechanical properties, with adhesion of level 0 (grid method), a pencil hardness of 2H-4H, scrub resistance ≥5000 times, and a performance retention rate of ≥91% after 500 hours of UV aging. DETAILED DESCRIPTION

[0015] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0016] The present invention provides a technical solution: Coating material formula (parts by weight) Optional additives: Diatomaceous earth (5-10 parts): 500 mesh porous structure, easy to diffuse fragrance, making the surface feel more delicate while increasing the overall hardness; Beeswax emulsion (0.5-1 part): solid content 50%, after emulsification, it fills the pores of the film and enhances adhesion.

[0017] Key performance indicators: project index Test standards Environmental protection VOC content<10g / L GB18582-2020 Antibacterial properties The antibacterial rate of Escherichia coli is ≥95%, and the antibacterial rate of Staphylococcus aureus is ≥98%. GB / T21866-2008 Aroma slow release Initial strength: 8.5 points (out of 10), ≥ 7.2 points after 12 months Sensory evaluation combined with GC-MS testing Mechanical properties Adhesion level 0 (cross-hatch method), pencil hardness 2H-4H, scrub resistance ≥5000 times GB / T9286, GB / T6739, GB / T9266 Weather resistance After 500h of UV aging, the aroma retention rate is ≥91.8%, and the antibacterial rate retention rate is ≥96.8%. GB / T1865-2009 Preparation method: Process steps (1) Premixing stage: Add agarwood hydrosol, deionized water and glutinous rice glue into a planetary mixer according to the ratio, stir at a low speed of 200r / min for 5 minutes to form an aqueous phase, add agarwood powder and pepper powder in turn (addition rate ≤1kg / min), continue stirring for 10 minutes until preliminary dispersion, and filter through a 50-mesh filter cloth.

[0018] (2) High-speed dispersion stage: adjust the temperature to 25-30℃, stir at 2500-3500r / min for 10-20 minutes (revolution 20-30r / min, rotation 3000r / min, turbulence intensity ≥10 4 s⁻¹), real-time monitoring of sedimentation volume ratio ≥0.95, viscosity 100±10s (coating-4 cup method).

[0019] (3) Filter the material: Filter through a 50-mesh filter cloth to remove impurities and obtain a uniform suspended slurry.

[0020] Quality Control Intermediate product testing: Dispersion uniformity: no visual precipitation, conductivity fluctuation ≤5%; Microbial contamination: total colony count ≤100 CFU / g (GB4789.2-2022).

[0021] Finished product testing: Aroma components: GC-O detection of characteristic aroma substances (such as 2-(2-phenylethyl) chromone); Safety: Oral acute toxicity LD50>5000mg / kg (GB15193.3-2014), no adverse reactions in skin irritation test.

[0022] Application Scenario (1) Wall coating Process: spray twice (4 hours interval), coating rate 8-10m² / kg, thickness 0.5-1.5mm, surface drying at 18-36℃ for 2-6 hours.

[0023] Performance: Formaldehyde purification rate 89% (GB / T18801-2015), TVOC removal rate 75% (12-hour dynamic test).

[0024] (2) Furniture decoration Process: Apply on the surface of mahogany / oak with a thickness of 0.5-1.5mm and let it dry for 3 hours to form a protective film.

[0025] Performance: Resists 50 wipes with 75% ethanol without loss of gloss, which means: (use a wipe such as cotton cloth or sponge soaked in 75% ethanol to wipe back and forth 50 times on the tested surface. After wiping, the surface gloss of the tested object remains unchanged without dulling, fading, fogging, peeling or flaking.) Better than traditional beeswax coating (20 scratches).

[0026] (3) Handicraft processing Process: Dip coating for ceramic crafts, thickness 0.3-1.0mm, drying for 24 hours.

[0027] Performance: Hardness 4H, resistant to the impact of a 1kg steel ball falling without damage, and has both olfactory and visual artistic effects.

[0028] Example 1: Standard wall coating Raw materials: 2kg agarwood powder, 0.02kg Dahongpao pepper powder, 4kg glutinous rice glue (solid content 30%), 6kg agarwood hydrosol, and 4kg deionized water.

[0029] preparation: The water phase temperature is controlled at 25°C, and the powder is added with low-speed stirring to avoid agglomeration; Stir at high speed for 15 minutes (speed 3000r / min, temperature 28±2℃).

[0030] Performance: Sedimentation volume ratio 0.97, pH=7.2; after 500h of UV aging, aroma score 7.5, antibacterial rate 93%, adhesion level 0.

[0031] Example 2: High Adhesion Furniture Coating Adjustment: Add 0.8kg beeswax emulsion (solid content 50%) and increase glutinous rice glue to 5kg.

[0032] Process: Add beeswax emulsion at the 12th minute of stirring, emulsify at 2000r / min for 3 minutes to fill the pores of the film.

[0033] Effect: Oak surface adhesion is level 0, can withstand water immersion for 48 hours without blistering, and the aroma lasts for 14 months.

[0034] Example 3: Coating for Ultra-Thin Crafts Raw materials: 1kg agarwood powder, 0.01kg pepper powder, 2kg glutinous rice glue, 3kg agarwood hydrosol, 2kg water, 6kg diatomaceous earth (500 mesh).

[0035] Process: Add diatomaceous earth and powder simultaneously, stir at high speed for 20 minutes to form a thixotropic slurry.

[0036] Performance: Thickness 0.5mm, wear resistance weight loss 0.03g (750g / 1000r), suitable for increasing the wear resistance of ceramic glaze.

[0037] IV. Beneficial Effects of the Invention Environmental breakthrough: natural ingredients account for more than 90%, VOC content is far lower than the national standard, and meets the requirements of green building materials.

[0038] Functional collaborative innovation: Dual-phase fragrance release system: quick release of agarwood hydrosol (60% in the initial stage) + sustained release of agarwood powder (72% retained in 12 months), the duration of fragrance is 4 times longer than that of commercially available products.

[0039] Antibacterial synergistic network: Sichuan pepper and agarwood work together to inhibit bacteria, with efficiency increased by 40%, and the retention rate after UV aging is ≥96.8%.

[0040] Industrial performance improvement: Agarwood powder is dispersed to D90=8.5μm, the specific surface area is increased by 70%, and the aroma retention rate is increased from 40% to 78%; The bonding strength of glutinous rice glue is increased from 1.2MPa to 2.8MPa, the adhesion reaches level 0, and the washability is increased by 10 times.

[0041] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A coating material containing agarwood components, characterized in that: The invention is prepared from the following raw materials in parts by weight: 1-3 parts of agarwood powder (80 mesh), 0.005-0.03 parts of pepper powder, 2-6 parts of natural glutinous rice glue, 3-9 parts of agarwood hydrosol, and 2-6 parts of water; the agarwood powder is derived from the genus Aquilaria of the Thymelaeaceae family, has an oil content of ≥15%, and a linalool content of ≥1.2 mg / g.

2. The coating material according to claim 1, characterized in that The agarwood powder complies with the "Pharmacopoeia of the People's Republic of China (2020)", T / HFS002-2024 and DB / T421-2017 standards. The artificial agarwood formation adopts the physical trauma stimulation method, and the agarwood formation time is 12-36 months.

3. The coating material according to claim 1, characterized in that The agarwood powder is processed to 80 mesh by air flow grinding technology, with a specific surface area of ​​5-8m² / g and a moisture content of ≤8%.

4. The coating material according to claim 1, characterized in that The natural glutinous rice glue is prepared by vacuum concentration after hydrolyzing glutinous rice starch with α-amylase, with a solid content of 25%-35% and a pH value of 6.5-7.

5.

5. The coating material according to claim 1, characterized in that The agarwood hydrosol is a condensate extracted from agarwood by steam distillation, with a linalool content of ≥0.8 mg / mL and a distillation temperature of ≤90°C.

6. The coating material according to claim 1, characterized in that 5-10 parts of diatomaceous earth or 0.5-1 part of beeswax emulsion can also be added; the coating has a pH value of 6.5-7.5, a VOC content of <10g / L, a particle size of pepper powder <100 mesh, and contains pepper amide ≥2%.

7. A method for preparing a coating material according to any one of claims 1 to 6, characterized in that: include: (1) Mix agarwood hydrosol, water and natural glutinous rice glue to form an aqueous phase, filter through a 50-mesh filter cloth, and add agarwood powder and pepper powder under low-speed stirring; (2) Stir at 2500-3500 r / min for 10-20 minutes at 20-40°C.

8. The preparation method according to claim 7, characterized in that A planetary mixer is used, and the stirring paddle is a combination of a frame paddle and a dispersion disk. The stirring temperature is controlled at 25-30°C, and the sedimentation volume ratio is ≥0.

95.

9. Use of the coating material according to any one of claims 1 to 6, characterized in that: Used for coating on walls, furniture or handicrafts, with a coating thickness of 0.5-1.5mm. It will dry for 2-6 hours at 18-36℃, forming a coating with a hardness of 2H-4H and a wear resistance of ISO2409 standard level 0.

10. The use according to claim 9, characterized in that After 500 hours of UV aging, the coating has a fragrance intensity retention rate of ≥91.8%, an antibacterial rate retention rate of ≥96.8%, and an adhesion level that remains unchanged.