Industries Inc

Cytec Industries Inc. CYASORB UV Absorbers and Light Stabilizers  

Cytec s family of light stabilizers includes Cyasorb UV absorbers, which prevent photo-degradation of polymers by competitive UV light absorption, energy quenchers, radical scavengers, and hydroperoxide decomposers. 

Low molecular weight benzophenophenone UV absorber recommended for un-saturated polyester and rigid PVC. 

A very compatible, cost-efficient benzophenone UV absorber 

High performance benzophenone OV absorber recommended for polyester film. 

A high molecular weight hindered phenol recommended for high performance polypropylene fiber applications. 

A high performance, gas fade-resistant trisphenol, characterized by low volatility, recommended for polyolefins and polyurethane elastOBwrs. 

A blend of Cyanox 1790 antioxidant and phosphite providing outstanding melt processing stabilization of polyolefins without pinking problems. 

Cytec Industries Inc. CYMIOX AntiMidants ThloMtar Antioxidants  

A sulfur synergist for phenolic antioxidants recommended primarily for in-service thermal stabilization of polyethylenes. 

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In 1987, Toray Industries, Inc., announced the development of a new process for making aromatic nitriles which reportedly halved the production cost, reduced waste treatment requirements, and reduced production time by more than two-thirds, compared with the vapor-phase process used by most producers. The process iavolves the reaction of ben2oic acid (or substituted ben2oic acid) with urea at 220—240°C ia the presence of a metallic catalyst (78). 

The Aromax process was developed in the early 1970s by Toray Industries, Inc. in Japan (95—98). The adsorption column consists of a horizontal series of independent chambers containing fixed beds of adsorbent. Instead of a rotary valve, a sequence of specially designed on—off valves under computer control is used to move inlet and withdrawal ports around the bed. Adsorption is carried out in the Hquid phase at 140°C, 785—980 kPA, and 5—13 L/h. PX yields per pass is reported to exceed 90% with a typical purity of 99.5%. The first Aromax unit was installed at Toray s Kawasaki plant in March 1973. In 1994, IFP introduced the Eluxyl adsorption process (59,99). The proprietary adsorbent used is designated SPX 3000. Individual on-off valves controlled by a microprocessor are used. Raman spectroscopy to used to measure concentration profiles in the column. A 10,000 t/yr demonstration plant was started and successfully operated at Chevron s Pascagoula plant from 1995—96. IFP has Hcensed two hybrid units. 

Johnson—Matthey/AESAR group, Aldrich Chemical, and EM Industries, Inc. Ultrahigh purity (99.999%) material is available only from Air Products and Chemicals, Inc. of Allentown, Peimsylvania. The price varies depending on the purity of the material from 25/kg (99%) through 250/kg (99.99%), to 1500—2500/kg (99.999%). Consumption of ZrF in the United States is less than 5000 kg/yr. 

Testing and Standards. Requirements for extmsion and mol ding grades are cited in ASTM specifications (79) and in Federal specification LP-389A of May 1964 (80). For fabricated shapes, FEP film and sheet are covered by Aeronautical Material Specifications (AMS) 3647 and LP-523 (81). Besides the specifications covered by the Fluorocarbons Division of the Society of the Plastics Industry, Inc. (82), other specifications are Hsted in Reference 83. 

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