PBT/Celanese

The lecturers on Polyphenlene Sulfide (Phillips) Aromatic Polycarbonate (GE), Acetal Homopolymers (DuPont), PBT (Celanese), PET (DuPont), Polysulfone and Polyarylate (UCC),... 

Poly(ethylene terephthalate), the predominant commercial polyester, has been sold under trademark names including Dacron (Du Pont), Terylene (ICI), Eortrel (Wellman), Trevira (Hoechst-Celanese), and others (17). Other commercially produced homopolyester textile fiber compositions iaclude p oly (1,4-cyc1 oh exa n e- dim ethyl en e terephthalate) [24936-69-4] (Kodel II, Eastman), poly(butylene terephthalate) [26062-94-2] (PBT) (Trevira, Hoechst-Celanese), and poly(ethylene 4-oxyben2oate) [25248-22-0] (A-Tell, Unitika). Other polyester homopolymer fibers available for specialty uses iaclude polyglycoHde [26124-68-5] polypivalolactone [24937-51-7] and polylactide [26100-51-6],... 

PEN film for audio- and videotape and various electronic appHcations and blow molded PEN containers for hot-fill appHcations are already being marketed in Japan. NDA is unlikely to ever become as inexpensive as terephthaUc acid but novel NDA-based polyesters will become available if a market need exists. One example could be the experimental polyester PBN (Celanese Corp.) this is the NDA analogue of PBT, poly(l,4-butylene naphthalene-2,6-dicarboxylate) [28779-82-0]. It has a high rate of crystallization, faster even than that of PBT, and its combination of physical properties is weU-suited for injection molding. 

The basic composition of matter patents had long since expired when Celanese sampled the market in 1970 with a glass fiber reinforced PBT product designated X-917. This product was subsequently called Celanex polyester molding compound. Eastman Kodak followed Celanese early in 1971, and General Electric followed Eastman Kodak later in the same year with Valox PBT polyester resin. Since that time a dozen or more additional companies around the world have entered (and some have subsequently exited) the business. 

Celanex . (Hoechst Celanese/Engineer-ing Plastics Hoechst UK] PBT polyesters, some glass and/or mineral filled for automotive body components, un-der-the-hood applies., computers, business machines, power tools, marine nrntor housings, ctmnecttus, switches, terminal boards, bobbins, reltys, heavy-duty ctmveyance equip. 

PBT, polymerizahon in laboratory (DMT from China Petrochemical Co., and BDO from Merck), and (Celanex 2001, Celanese Co.) EPR (EPCAR 306, Mooney viscosity = 30, B.E. Goodrich) DCP (Merck) detailed experimental conditions were not... 

PBT/Acrylic Hoeehst Celanese Vandar None Crystalline/ Amorphous... 

PBT/copoly(ether-ester) elastomer blend molded parts exhibit excellent surface finish and good paint adhesion without the need for primers. About 3 kton/y of this blend is being used for painted, flexible bumper fascias in selected luxury model cars in the USA. Because of the excellent surface esthetics of the blend, molded-in colors are also being evaluated to reduce the painting costs. Lower levels (< 20%) of copoly(ether-ester) elastomers have also been blended with PBT for high impact strength molding resin applications (Celanex , Hoechst-Celanese). 

Linear aliphatic chols are widely used as raw materials for polymers. Polymers synthesized from even-carbon diols tend to show excellent polymer properties. 1,4-Butanediol is very important as raw material for various polymers such as urethanes and polybutylene terephthalate (PBT), which is an engineering plastic. Since Celanese Corporation described a PBT resin in 1970, the demand for PBT resin, which is mainly used for automotive, electrical, and electronic equipment parts, has been expanding rapidly [1]. THF is also a major 1,4-butanediol derivative as a raw material for poly(tetramethylene ether) glycol used for artificial leather and elastic fibers in addition to being a high-performance solvent. Significant growth in demand for these 1,4-butanediol derivatives is expected in Asia, primarily in China. 

Poly(butylenes terephthalate), often abbreviated to PBT or PBTP, is manufactured by condensation polymeri2ation of dimethyl terephthalate and butane-1,4-diol in the presence of tetrabutyl titanate. The polymer is also known as poly(tetramethylene terephthalate), PTMT in short. Some trade names for this engineering thermoplastic are Tenite PTMT (Eastman Kodak), Valox (General Electric), Celanex (Celanese) in America and Amite PBTP (Akzo), Ultradur (BASF), Pocan (Bayer), and Crastin (Ciba-Geigy) in Europe. 

DuraloyA andar Celanese/Hoechst POM/TPU or PBT GF Automotive, electronics... 

Vandar 8001 Hoechst - Celanese PBT blend Yes Exterior automotive body panels... 

Celanese Corporation [85] claimed it was possible to heat stabilise filled PTT or PBT with low levels (0.25-1 wt%) of a polyamide such as Nylon 6, Nylon 6,6 or Nylon 6,10. 

Figure 4.30 Stress vs. strain at various temperatures for Celanese Celanex 2500— general purpose, nucleated, easy flow PBT resin [3].

Figure 4.40 Tensile stress at break vs. temperature for Celanese Celanex general purpose PBT resins [3].

Figure 4.42 Flexural modulus vs. temperature for Celanese Celanex flame retardant, glass fiber reinforced PBT resins.

Figure 4.79 Dielectric strength vs. thickness for Celanese Celanex PBT resins.

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