Chemical Information and Process Technology
Mass Balance on POM (Polyoxymethylene)
3 Formaldehyde à Trioxane
Trioxane + 3 Ethylene Glycol à 3 Dioxolane + 3 Water
Polymerization of Trioxane + Dioxolane à 6 POM Copolymer
To produce 1 ton (1000kg) of POM, using the above equation; raw materials needed are as shown in Table below:
Raw Materials | Amount (kg) |
Formaldehyde | 2000 |
Ethylene Glycol | 1000 |
Additional raw materials needed are boron trifluoride etherate and water.
Calculation
The total equation for POM is as follows
12 Formaldehyde + 3 Ethylene Glycol à 6 POM Copolymer
And the chemical formulas for each are:
12 H2CO + 3 C2H6O2 à 6 [OCH2]
2 H2CO + 0.5 C2H6O2 à 1 [OCH2]
The equation is already balanced and for each 1 mol of POM,
- 2 mols of Formaldehyde is needed
- 0.5 mols of Ethylene Glycol is needed
Using the periodic table, the mass for each chemical can be obtained through back-calculation using their respective molecular weight. This is governed by the equation, mol = mass/molecular weight. The molecular mass for each is as follows:
H2CO = (2 + 12 + 16)* 2 = 60
C2H6O2 = (24 + 6 + 32) * 0.5 = 31
OCH2 = (16 + 12 + 2)* 1 = 30
Market Information (Major Producers)
Company | POM Tradename | Type of POM |
DuPont | Delrin | Copolymer |
Korean Engineering Plastics | Kepital | Homopolymer |
Ticona Engineering Plastics | Celcon, Hostaform | Homopolymer |
BASF | Ultraform | Homopolymer |
DuPont, Ticona, and BASF make up 90% of the French POM market. Demand increased by 8% in the United States, with a growth rate of 5% in Europe. In Asia, POM is mainly used in the electronics sector (CDs, videocassettes). In contrast, in Europe, it is largely used in the automobile industry and the electrical appliance sector.
KEPEL maintains 65% of Korea’s domestic market share. KEP POM production capability is at over 65,000 MT/yr, which can cover about 10% of worldwide copolymer demand since its third expansion of manufacturing facilities. KEP is now recognized worldwide for its product quality as evidenced by a number of certifications.
DuPont Overview
After four years of development DuPont patented its POM in 1956 and began construction of a 20-million pound annual-capacity production plant at Parkersburg, West Virginia, completed in 1960. As manufacture commenced, total research and development costs for the project topped $50 million dollars. DuPont fully expected to recover these costs by marketing Delrin® as a general substitute for nonferrous metals, but a patent dispute and stiff competition held profitability down. As a result, DuPont focused subsequent research efforts on more sophisticated and specialized engineering polymers.
Despite its troubled beginnings, Delrin® thrived in the long run and has been steadily improved over the years.
Today, Delrin® is widely acclaimed as
-
lightweight but durable low wear,
low friction plastic for electronic office equipment, advanced conveyor technology, and automotive applications.
Ticona Overview
Celcon / Hostaform POM is the world market leader of polyoxymethylene copolymers. The POM range includes grades for all processing methods and many different applications in various industries.It is characterized by excellent toughness and dimensional stability, outstanding spring and slip properties and good heat deflection temperature ratings and chemical resistance.
It is characterized by:
-
excellent toughness and dimensional stability
outstanding spring and slip properties
good heat deflection temperature ratings and chemical resistance.
Korea Engineering Plastics (KEP) Overview
KEP was the first Company producing Polyacetal resin in Korea. The first commercial production of its POM began in 1988 under the brand name "KEPITAL". Ever since, KEP has been one of the engines for the growth of the Korean engineering plastic industry. KEPITAL copolymer resins can be found in engineered structural components of cutting-edge products, such as, automotive, electrical, electronics and industrial machinery.
KEPITAL has its own distinctive features such as:
-
excellent thermal stability at molding
-
exhibits better flow enabling high speed production
-
ensures low deposit on the mold surface during processing.
BASF Overview
A line of acetal polyoxymethylene (POM) copolymer products under the tradename Ultraform® are available from BASF. BASF's Ultraform® is known for its:
-
Ultraform has high strength and creep resistance.
-
High abrasion and fatigue resistance together with the low friction are of major importance for the maintenance-free performance of the machine.
-
Dimensional stability not only in production but during full product life and resistance to moisture, chemicals and
-
The ball bearings made of Ultraform need no lubricant and withstand operating temperatures between - 40° and + 80° C. They can operate at rotation speeds of more than 5000 rpm. Other typical applications are in copiers, printers, pool cleaners, rotating beacons and domestic appliances.
-
Chemical resistance of Ultraform® acetal, particularly with respect to conventional grades of gasoline (even those containing methanol and ethanol) as well as to diesel fuels
LIST of Other Global POM Producers
Table below shows the list of companies that produce POM worldwide:
Company Name | POM Tradename |
Quadrant Engineering Plastic Products | Acetron® |
Polymer Technology & Services |
|
RTP Company |
|
API - Kolon | Kocetal® |
Aclo | Accucomp |
ALBIS PLASTICS |
|
Asahi | Lynex-T |
Ashley Polymers | Ashlene® |
BASF | Ultraform |
Centroplast | Centrodal |
Chase Plastics | CP Pryme® |
Chem Polymer | Formax |
Custom Resins | Duratel™ |
DSM Engineering Plastics | Plaslube® |
DuPont | Delrin® |
Ensinger | Tecaform™ |
Global Polymers |
|
Korea Engineering Plastics (KEP) | Kepital® |
Lati | Latan |
Lati | Latilub |
LG Chemicals | Lucet® |
LNP | Lubriloy® |
Mitsubishi | Iupital® |
MRC Polymers | Talnex |
Noveon | Stat-Tech™ |
Omnia Plastica |
|
Owens Corning |
|
Oxford Polymers |
|
Polymer Resources |
|
Polymersan | Polipom® |
PolyOne | Edgetek® |
Techmer Lehvoss | Plaslube® |
Ticona | Celcon® |
Ticona | Hostaform |
Westlake Plastics | Pomalux® |
Westlake Plastics | Dielux® |
Zakłady Azotowe | Tarnoform |
Zell-Metall | Zellamid® |
Other Plant Location and Capacities
Asahi-DuPont POM (Zhangjiagang) Co. Ltd. is a joint venture between DuPont China Holding Co. Ltd. and Asahi Kasei Corporation of Japan. The JV company is focused on acetal copolymer resins in China production. The facility was started in spring 2004 with an initial annual production capacity of 20,000 tons that will be stepped up progressively to 60,000 tons.