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About
Kunming Donghou Science and Technology Development Co., Ltd. is one of the largest titanium dioxide manufacturers in Yunnan Province, producing titanium dioxide by sulfuric acid method. It is a modern enterprise integrating scientific research, production, sales and service.
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Products
The company's carefully crafted R-251 rutile titanium dioxide boasts excellent properties such as easy dispersion, high whiteness, high brightness, strong hiding power, and high weather resistance.
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Party Branch
Since its establishment, the company has established a new development concept, committed to developing high-tech and manufacturing high-end products. It is committed to green and environmental protection and safe, green development.
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Blog
Based on extensive absorption of advanced domestic and international production processes and management experience, a large number of technological innovations and technological transformations have been carried out
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Recruitment
Currently, the company has more than 500 employees, including 25 senior and intermediate engineers, and more than 100 employees with a junior college degree or above.
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Contact
The company adheres to the business philosophy of "customer satisfaction and respect for cooperation", and takes "quality first and honesty" as its service tenet. It uses technological innovation to promote the sustainable development of the enterprise
Ingenious manufacturing, creating the future
—— CRAFTED WITH INGENUITY, CREATING A SHARED FUTURE ——
Rutile titanium dioxide - R-251
R-251 is a versatile rutile titanium dioxide pigment designed for applications in coatings, paints, plastics, etc. It features a bluish undertone, excellent dispersibility, superior hiding power, and high gloss. Excellent particle size control, surface treatment technology, and impurity control ensure the product's superior pigment performance and good performance in various application systems.
Keywords:
Kunming Donhao
Donhao Technology
Titanium dioxide
Rutile type
Belongs to category:
R-251 is a versatile rutile titanium dioxide pigment designed for applications in coatings, paints, and plastics. It features a bluish undertone, excellent dispersibility, superior hiding power, and high gloss. Its excellent particle size control technology, surface treatment technology, and impurity control technology ensure excellent pigment performance and good performance in various application systems.
| Parameters | Value |
| TiO2 content, % | ≥93.0 |
| Inorganic surface treatment | ZrO 2 . nH 2 O、Al 2 O 3 . nH 2 O |
| Organic surface treatment | Polyols |
| Brightness | ≥94.5 |
| Tinting strength (Reynold's number) | ≥1880 |
| Oil absorption, g/100g pigment | ≤18 |
| 105°C volatiles, % | ≤0.5 |
| 105°C volatiles, % | 6.0~9.0 |
| 45μm residue, % | ≤0.02 |
| Water extract resistivity, Q . M | ≥80 |
| Rutile content, % | ≥98.0 |
| Dispersibility (Hegman number) | ≥6.25 |
| True density, g/cm3 | 4.1 |
| International Standard ISO 591 Classification | R2 |
| American Society for Testing and Materials ASTM D476 Classification | V |
| Application | Value |
| Coatings | Excellent whiteness, dispersibility, hiding power, and weather resistance |
| Paints | Excellent whiteness, dispersibility, hiding power, gloss, and weather resistance; low oil absorption |
| Plastics | Bluish undertone, excellent whiteness, tinting strength, hiding power, and weather resistance |
| Color pastes, color chips | Bluish undertone, excellent whiteness, tinting strength, hiding power, low oil absorption and viscosity |
Application Cases
Plastic
Paint
Coatings
WeChat Official Account
Mobile Website
Company Address
Beiying Village Committee, Yongding Street Office, Fumin County, Kunming City, Yunnan Province
Contact Number
0871-68832208
Enterprise Email
kmdhkj@yeah.net
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