Polyacetal trade names

ALTERNATIVE NAMES, TRADE NAMES Polyacetal, polyoxymethylene, acetal, Delrin , Celcon (copwlymer), Ultraform (copolymer)... 

Uses Antioxidant, stabilizer for polyolefins, elastomers, styrenics, polyacetals, cellulosics, polyesters, PU, PVC, petroleum prods., org. substrates, food-grade polymers antioxidant in lubricants for incidental food-contact use Regulatory FDA 21CFR 178.2010, 178.3570 Manuf./Distrib. Ciba Spec. Chems./Plastic Addit. http //www. cibasc. com Trade Name Synonyms Irganox 259 [Ciba Spec. Chems./Plastic Addit. http //www. cibasc. com]... 

Polyacetals prepared from formaldehyde are engineering thermoplastics, which have found use in traditional metal applications. Some trade names of these polymers are Delrin acetal homopolymer (DuPont) Celcon acetal copolymer (Celanese/Hoechst) Duracon acetal copolymer (Celanese and Diacel—joint venture) Tenac acetal homopolymer by Asahi Chemical in Japan and Ultraform acetal copolymer jointly by BASF and Degussa, in Germany. The polymers have the basic structure shown below ... 

Polyacetal can be divided into two basic types, acetal homoploymer and acetal copolymer. Both homopolymer and copolymer are available in a range of molecular weights (M = 20 000-100 000). The homopolymer is a polymer of formaldehyde with a molecular structure of repeated oxymethylene units (Staudinger, 1932). Large-scale production of polyformaldehyde, i.e. polyacetal, commenced in 1958 in the USA (US Patent 2 768 994,1956) (British patent 770 717,1957). Delrin (1959) was the first trade mark for this polymer by Du Pont Company. The copolymers were introduced by the Celanese Corporation of America, and the first commercial product named Celcon (1960). One of the major advantages of copolymerization is to stabilize polyacetal because the homopolymer tends to depolymerize and eliminate formaldehyde. The most important stabilization method is structural modification of the polymer by, for example, copolymerization with cyclic ether. 

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