Celanese ester

The monophenol fraction was extracted with 10% sodium hydroxide to separate it into phenolics and neutral oils. The neutral oils were found to be about 20% of the monophenols fraction. After removing the neutral oils, individual phenols were identified by gas chromatography using the retention times on three separate columns, (1) 25% Celanese ester 9 on Chromosorb W, (2) 25% diethylene glycol succinate on Chromosorb W, and (3) 20% silicone SE-30 on Chromosorb W. Quantitative estimates were made using the celanese ester column. 

Acrylate Esters, A Guide to Safety and Handling, compiled by Badische Corp., Celanese Chemical Co. Inc., Rohm and Haas Co., and Union Carbide Corp., 1984. 

Aromatic polyesters were particularly good candidates for this new field of thermotropic main-chain polymers, since the relatively low energy of association of the ester groups led to low inter-chain forces. Further research led to the discovery that incorporation of 2,6-naphthylene or of 4,4 -biphenylyl groups, in addition to p-phenylene groups, as components of aromatic polyesters, introduced a useful new degree of randomness. Particularly useful, and the basis of the commercial products Vectra (polymer) and Vectran (fibre) from Hoechst-Celanese and Kuraray, are the copolymers formed by polymerisation of mixtures of p-acetoxybenzoic acid and 6-acetoxy-2-naphthoic acid. Within a range of... 

The basic cellulose unit contains three hydroxyl groups. The triester cellulose triacetate forms when cellulose is reacted with glacial acetic acid. Hydrolysis removes some of the acetate groups to form a secondary ester, which averages about 2.4 acetyl groups per unit rather than three. The secondary ester is then dissolved in acetone and the solution ejected through a spinneret to form fibers. Cellulose acetate processed in this manner is referred to as acetate rayon, but it may be more commonly known by its trade name Celanese. 

Suitable fire retardant materials include halogen compounds in combination with antimony compounds, including, tetrabromobis-phenol A and antimony trioxide. Examples for halogen free flame retardants are phosphate esters, such as Hoechst Celanese AP422 or Hoechst Celanese IFR 23. 

Douglas A, Eckel, E. I. Du Pont de Nemours Sc Co.. Inc., Wilmington. DE, http //www.dupom.com/ag/. Information Retrieval Varadaraj Elango, Hnechst Celanese Corporniion. Corpus Cltrisli. TX, Esters, Organic... 

George A. Serad, Hoechst Celanese Corporation, Charlotte. NC. hup // w ww.cdanesc.com/. Fibers Cellulose Esters Raymond B. Seymour, University of Houston. Houston. TX. hlip //www. 

Kwoliang D. Tau, Hoethsl Celanese Corporation. Corpus Christi. TX, Esters, Organic... 

The copolymerization between trioxane and suitable comonomers (ethylene oxide, 1,3-dioxolane, diethylene glycol formal, 1,4-butane diol formal in amounts of 2-5% by weight) is performed using cationic initiators. The cationic initiators could be Lewis acids, such as BF3 or its etherate BF3Bu20 which was used, for example by Celanese (the mechanism of this reaction was studied in detail [163,164]) or protic acids such as perchloric acid, perfluoroalkane sulfonic acids and their esters and anhydrides. Heteropoly acids were used and also a series of carbenium, oxocarbenium salts, onium compounds, and metal chelates. To regulate the molecular weight chain-transfer agents, such as methylal and butylal, are added. 

A whole series of high-performance polyester LCPs was introduced in 1985. They were assembled from p-hydroxybenzoic acid and 6-hydroxy-2-naphthoic acid. Polyarylates (PARs) - amorphous phenolic esters derived from aromatic dicarboxylic acids (mixtures of terephthalic acid and isophthalic acid) and biphenols such as bisphenol A - are produced by Amoco (Ardel ), Celanese (Durel ) and DuPont (Arylon ) at a volume of approx. 2000 t/a. 

Difunctional cyanate ester monomers were discovered 30 years ago by Ernst Grigat, an organic chemist now retired from Bayer of Levetkusen, Germany, who was also the first to succeed in making organic cyanate esters at all. Bayer licensed dicyanate/polycyanurate technology to Mitsubishi Gas Chemical Co., Tokyo, and to the then Celanese Corp., New York City. Mitsubishi improved the resin by copolymerization of bisphenol A dicyanate with the bis-(maleimide) of 4,4 -methylenedianiline. 

Genagen. [Hoechst Celanese/Colorants Surf. Hoechst AG] Ethoxylated ethers or esters detergent, lubricant... 

Lubricant EHS. [Hoechst Celanese/ Colorants Surf.] Fatty acid ester heat-stable boundary lubricant for microemulsions for heavy-duty machining of aluminum. 

Phosphate Ester 123. [Hoechst Celanese] Phosphoric acid ester, corrosion inhibitor, lutoicant... 

Elhyl-l-hexyl acrylate 2-Ethylhexyl 2-ptopenoate 2-Ethylhexyl acrylale 2-Ethylhexylester kyseliny akrylove HSDB 1121 Mono(2-elhylhexyl) acrylate NSC 4803 Octyl acrylale 2-Propenoic acid, 2-ethylhexyl ester. Liquid mpn -90° bp60 = 123-127° d o 0.880 insoluble in H2O (< 1 mg/ml). BASF Corp. Hoechst Celanese Sartomer Union Carbide Corp. 

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