Founded in 2002, Dowhon Group is a modern management enterprise integrating R&D, Production, Sales and Service, headquartered in Chengdu National Industrial Park- Meishan Jinxiang Chemical Industrial Park.
Dowhon currently has 10 sets of fluoroelastomer precompound and compound production lines with total production capacity over 8,000 tons/year. We also have a 100,000 class purification workshop with 3 production lines specializing in the production of fluoroelastomer compound for smart wearable devices, annual production capacity over 3,000 tons/year. A 10,000 class purification workshop specializing in the production of FFKM rubber parts for semiconductors, aerospace,etc.
Dowhon always insists on bringing in the world's leading technology and gathering high-tech talents. We have gathered a large number of local and foreign high-end technical talents in the fields of production, R&D, and sales. To support our business, Dowhon built specialized in FFKM R&D laboratory, smart wearable engneering center and a extrusion application of fluoroelastomer research laboratory, etc.
We are strictly controlled under IATF 16949:2016, GB/T 28001-2011,GB/24001-2004. Our products are widely used in the automotive industry, semiconductor, consumer electronics, aerospace, chemical and other fields, and are also irreplaceable key materials in the cutting-edge defense industry. Our products are sold to many domestic provinces and cities, and also exported to more than 30 countries and regions such as Europe, America, South Korea, Japan, Southeast Asia, the Middle East and etc...
PVMQ Gum contains a large number of phenyl groups. In addition to the high temperature resistance and dielectric properties common to general methyl vinyl silicone rubber, it also has better radiation resistance, ablation resistance, physical and mechanical properties and excellent low temperature performance. This product is insoluble in water, soluble in toluen, etc. It has the excellent characteristics of small compression deformation and resistance to saturated vapor pressure.
In aviation, electronics, machinery, chemical industry and other industrial sectors, it can be used to manufacture high and low temperature resistant sealing materials and waterproof and moisture -proof insulating materials; Because of its physiological inertia, it can be used for blood refrigeration sealing and medical tubes in medical and health aspects; It can also be used to manufacture sealing materials and molded products with special properties such as radiation resistance, high temperature resistance, ablation resistance, etc.
It has certain flexibility at minus 110ºC, the products produced as basic raw materials can be used well in ultra -low temperature working environment;
Features:
- Good damping performance;
- Good radiation resistance;
- Long term storage stability;
- High consistency, low volatility, no odor, excellent thermal stability.
Grades details:
| Product Name |
Vinyl Content % |
MW |
VOC |
Phenyl Content |
Termination |
DHS004
|
0.04-0.06 |
480-690thousand |
≤3% |
4%-40% |
Vinyl |
DHS008
|
0.08-0.11 |
480-690thousand |
≤3% |
4%-40% |
Vinyl |
DHS023
|
0.21-0.24 |
480-690thousand |
≤3% |
4%-40% |
Vinyl |
Application:
The use of phenyl silicone rubber with different structures will directly affect the performance of the final product, but for methyl phenyl vinyl rubber, the vinyl content, distribution, etc. will also greatly affect the physical properties and vulcanization properties of the vulcanizate; The low temperature resistance, damping property and radiation resistance of vulcanizate were greatly affected by different phenyl content.
(1) Vinyl content
With the increase of vinyl content in silicone gum, the crosslinking ratio increased, the hardness and tensile strength of vulcanizate increased correspondingly, and the elongation and compression set decreased.
(2) Vinyl position and distribution
The properties of the vulcanizate obtained from vinyl terminated silicone gumwere better than those from non vinyl terminated general grade silicone gum . This is because the vinyl end group has the role of molecular chain growth during crosslinking, so the physical and mechanical properties of the vulcanizate are improved. Our company uses D4 as raw material to make silicone gum . The vinyl raw silicone gum on the side chain is more evenly distributed, so as to improve the cross -linking density and rebound better.
(3) Phenyl content
Different phenyl content in silicone gum determines the functionality of phenyl silica gel. Low phenyl content of silicone gum is the best for low temperature resistance, and medium phenyl content can obviously improve the damping property of silica gel; High phenyl silica gel can obviously reflect the radiation resistance of silica gel.
Packaging And Storage:
Packed in cartons lined with plastic bags, 20kg/box. Store in a cool, dry, well ventilated place, away from strong oxidants. Avoid contact with strong acid, alkali and metal lead. Transport as non dangerous goods. Handle with care to prevent package damage. During transportation, it shall be rain proof, moisture -proof, sun proof and prevent acid, alkali and other impurities from penetrating
Shelf Life:
In the unopened original package, it shall be stored for 24 months from the date of production under 40 ºC .
ISO9001, ISO14001, ISO16949
Currently has 65 patents, 15 invention patents are under application, participated in the formulation of 4 National Standards.
1, What's your MOQ?
BY air MOQ is 20-25KG, by sea MOQ is 100KG.
2, What's your delivery time?
For stock goods, we can arrange delivery within 3 working days, otherwise delivery time is around 7-14 working days.
3, What's your package?
Usually goods are packaged with PE film in carton. The weight is 20-25kg net per carton. 500kgs/625kgs/700kgs in a pallet.
4, How can we select the exactly grade which suit for our usage?
Please contact our sales, we'll recommend suitable grade according to your typical physical properties and other related information.
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