Unitika resin

Uniterm system Unitika Unitika resin Unit processes... 

Although several companies have produced polyarylates, Unitika in Japan and Hoechst-Celanese are the only ones active in the marketplace. Unitika resin is marketed in the United States by Amoco Performance Polymers under the Ardel trademark. The reason for this decline may be the competition of PC, polyester carbonates, and polysulfone resins. Worldwide sales are quite small, probably less than 1000 t/yr. 

The high tendency to homopolymerization of the 4-acetoxybenzoic acid relative to transesterification is responsible for the nonuniform distribution. In order to obtain copolymers with HBA units randomly distributed along the chains, the monomer 4-acetoxybenzoic acid may be added in portions rather than in a singla batch. Unitika (Suenaga and Okada, 1989) advanced the production process so that the HBA and PET moieties are uniformly distributed in the copolymers. With the advanced process the resins ( Rodrun LC-5000 ) showed almost 100% solubility in a hot (150 °C-160 °C) 50/50 mixed solvent of tetrachloroethane and phenol, while that produced by the old (Jackson and Kuhfuss, 1973) method has an insoluble residue of about 30 wt-%. The 13C-NMR spectra also showed that... 

In this and the following two sections we consider the data for a PLC and for different blends of that PLC with isotactic polypropylene (PP). The PLC used in this study was liquid crystalline copolyester PET/0.6PHB, where PET = poly (ethylene terephthalate), PHB = p-hydroxybenzoic acid and 0.6 is the mole fraction of PHB in the copolymer, manufactured by Unitika Ltd, Kyoto, Japan. The content of the PLC in the blends with PP was varied from 0 to 20 wt%. The samples were prepared by injection molding. PP, resin VB65 llB, was supplied by Neste OY, Finland. 

F. Matsuoka, K. Ueda, T. Matsumoto, and Y. Oogi, Biodegradable resin foam sheet, biodegradable resin foam article and biodegradable resin molded container, US Patent 7 972 669, assigned to Unitika Ltd. (Hyogo, JP), July 5, 2011. 

Non-compatibilized blends of PS with either PEST or PEST and PMMA have been used for decorative applications or as the so-called plastic paper (Kamata et al. 1980). Similarly, PAr blends with either SAN (Brandstetter et al. 1983a, b, c) or high-performance blends of LCP with thermoplastic polymers (e.g., PP, PS, PC, PI) (Haghighat et al. 1992) showed adequate performance for the envisaged applications. However, most PS blends with engineering resins require compatibi-lization. Thus, for example, PS with PA-6 was compatibilized by addition of either methylmethacrylate-styrene copolymer (SMM) (Fayt et al. 1986b) or SMA (e.g., used in PARA/PS blends) (Lee and Char 1994). POM was blended with a small amount of either PS poly(a-methyl styrene) (MPS) or SAN and with particulate fillers (Tajima et al. 1991). PAr/PS blends were compatibilized with PAr-PS segmented copolymer (Unitika Ltd. 1983). 

In Japan four companies, namely, Kanebo Gohsen Ltd., Unitika Fibers Ltd., Kuraray Co. Ltd. and Mitsubishi Plastics Inc. are receiving a supply of PLA resins from Nature Works. Of the four, the first three companies are synthetic fiber producers. 

Aromatic polyesters or polyarylates have become an important class of high performance thermoplastic resins. Polymers based on bisphenol A with a mixture of isophthalic and terephthalic acids (APE) have been commercially available since the early 1970 s when Unitika first commercialized its U-Polymer in Japan. Since that time, other companies worldwide have entered the market with polymers of similar composition. Among those which have been active in this area are Teijin, Hooker, Union Carbide, Bayer and Dynamit Nobell>2.3,4. 

In 1971 Unitika Co. Ltd. issued a series of patent applications for blends of polyarylates (produced by polycondensation of iso- and terephthahc adds with bisphenol-A), PAr, with 30 % ABS, polyacrylate rubber, PP, EVAc, PE, with 5 - 90 % PC, and 50 % PET. The later blends with excellent processability, moldabiUty, good toughness and impact strength were commercialized as U-8000. Over the years PAr has been blended with nearly all commerdal resins, including ABS, EPDM, lonomers, LCP, PA, PB,... 

Polymer material is Nylon6 and Ruoromica nano-composites (Unitika , M1030D, PA-6 addition 4.7wt% Fluoromica) thermoplastic resin, and more experimental details are in reference [4,5]. Experimental parameters are as tablet. 

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